10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2024

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from __________________ to __________________

Commission File Number: 001-39438

Disc Medicine, Inc.

(Exact name of registrant as specified in its charter)

Delaware	85-1612845
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
321 Arsenal Street, Suite 101 Watertown, Massachusetts	02472
(Address of principal executive offices)	(Zip Code)

(617) 674-9274

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, $0.0001 Par Value	IRON	The Nasdaq Global Market

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☐	Accelerated filer	☐
Non-accelerated filer	☒	Smaller reporting company	☒
		Emerging growth company	☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

As of November 7, 2024 there were 29,757,732 shares of Common Stock, $0.0001 par value per share, outstanding.

Table of Contents

		Page
FORWARD LOOKING STATEMENTS		1
RISK FACTOR SUMMARY		3
PART I.	FINANCIAL INFORMATION	5
Item 1.	Financial Statements (Unaudited)	5
	Condensed Consolidated Balance Sheets	5
	Condensed Consolidated Statements of Operations and Comprehensive Loss	6
	Condensed Consolidated Statements of Stockholders’ Equity	7
	Condensed Consolidated Statements of Cash Flows	9
	Notes to Unaudited Condensed Consolidated Financial Statements	10
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	21
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	30
Item 4.	Controls and Procedures	30
PART II.	OTHER INFORMATION	31
Item 1.	Legal Proceedings	31
Item 1A.	Risk Factors	31
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	81
Item 3.	Defaults Upon Senior Securities	81
Item 4.	Mine Safety Disclosures	81
Item 5.	Other Information	81
Item 6.	Exhibits	82
Signatures		83

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FORWARD LOOKING STATEMENTS

This Quarterly Report on Form 10-Q, or Quarterly Report, of Disc Medicine, Inc., or the Company, contains or incorporates statements that constitute forward-looking statements within the meaning of the federal securities laws. Our forward-looking statements include, but are not limited to, statements regarding our or our management team’s expectations, hopes, beliefs, intentions or strategies regarding the future. In addition, any statements that refer to projections, forecasts or other characterizations of future events or circumstances, including any underlying assumptions, are forward-looking statements. The words “anticipate,” “believe,” “contemplate,” “continue,” “could,” “estimate,” “expect,” “intends,” “may,” “might,” “plan,” “possible,” “potential,” “predict,” “project,” “should,” “will,” “would” and similar expressions may identify forward-looking statements, but the absence of these words does not mean that a statement is not forward-looking. Forward-looking statements in this Quarterly Report on Form 10-Q may include, for example, statements about:

•the initiation, timing, progress, results, and cost of our research and development programs and our current and future preclinical studies and clinical trials, including our planned APOLLO clinical trial of bitopertin, our ongoing Phase 1b/2 clinical trials of DISC-0974 and our ongoing Phase 1 clinical trial of DISC-3405, and including statements regarding the timing of initiation and completion of studies or trials and related preparatory work, the period during which the results of the trials will become available, and our research and development programs;

•our ability to efficiently discover and develop product candidates;

•our ability and the potential to successfully manufacture our drug substances and product candidates for preclinical use, for clinical trials and on a larger scale for commercial use, if approved;

•our ability to obtain funding for our operations necessary to complete further development and commercialization of our product candidates;

•our ability to use the U.S. Food and Drug Administration’s, or FDA’s, Accelerated Approval Program for bitopertin;

•our ability to obtain and maintain regulatory approval of our product candidates;

•our ability to commercialize our products, if approved;

•the pricing and reimbursement of our product candidates, if approved;

•the implementation of our business model, and strategic plans for our business and product candidates;

•the scope of protection we are able to establish and maintain for intellectual property rights covering our product candidates;

•estimates of our future expenses, revenues, capital requirements, and our needs for additional financing;

•the potential benefits of strategic collaboration agreements, our ability to enter into strategic collaborations or arrangements, and our ability to attract collaborators with development, regulatory and commercialization expertise;

•future agreements with third parties in connection with the commercialization of product candidates and any other approved product;

•the size and growth potential of the markets for our product candidates, and our ability to serve those markets;

•our financial performance;

•the rate and degree of market acceptance of our product candidates;

•regulatory developments in the United States and foreign countries;

•our ability to contract with third-party suppliers and manufacturers and their ability to perform adequately;

•our ability to produce our products or product candidates with advantages in turnaround times or manufacturing cost;

•the success of competing therapies that are or may become available;

•our ability to attract and retain key scientific or management personnel;

•the impact of laws and regulations;

•developments relating to our competitors and our industry;

•the impact of global economic and political developments on our business, including rising inflation and capital market disruptions, the current conflicts between Russia and Ukraine and between Israel and Hamas, economic sanctions and economic slowdowns or recessions that may result from such developments which could harm our research and development efforts as well as the value of our common stock and our ability to access capital markets; and

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•other risks and uncertainties, including those listed under the caption “Risk Factors.”

These forward-looking statements are based on information available to us at the time of this Quarterly Report on Form 10-Q and current expectations, forecasts and assumptions, and involve a number of judgments, risks and uncertainties. Accordingly, forward-looking statements should not be relied upon as representing our views as of any subsequent date, and we do not undertake any obligation to update forward-looking statements to reflect events or circumstances after the date they were made, whether as a result of new information, future events or otherwise, except as may be required under applicable securities laws.

The outcome of the events described in these forward-looking statements is subject to known and unknown risks, uncertainties, and other factors. As a result of a number of known and unknown risks and uncertainties, our actual results or performance may be materially different from those expressed or implied by these forward-looking statements. Factors that could cause actual results to differ include, but are not limited to, those discussed in the section titled “Risk Factors” included under Part II, Item 1A of this Quarterly Report on Form 10-Q.

2

RISK FACTOR SUMMARY

Below is a summary of the principal factors that make an investment in our common stock speculative or risky. This summary does not address all of the risks that we face. Additional discussion of the risks summarized in this risk factor summary and other risks that we believe are material to our investors can be found below under the heading “Item 1A. Risk Factors” and should be carefully considered, together with other information in this Quarterly Report on Form 10-Q and our other filings with the SEC, before making an investment decision regarding our common stock.

•Our limited operating history may make it difficult for you to evaluate the success of our business to date and to assess our future viability.

•We have incurred significant net losses since our inception and anticipate that we will continue to incur losses for the foreseeable future.

•We have no products approved for commercial sale and have not generated any revenue from product sales.

•Our existing and any future indebtedness could adversely affect our ability to operate our business.

•We will need to raise substantial additional funding. If we are unable to raise capital when needed or on terms acceptable to us, we may be forced to delay, reduce, or eliminate some of our product development programs or commercialization efforts.

•We have not yet progressed any product candidates into a Phase 3 clinical trial and may be unable to successfully complete any additional clinical trials for any product candidates we develop. Certain of our programs are still in preclinical development and may never advance to clinical development.

•Our programs are focused on the development of therapeutics for patients with hematologic diseases, which is a rapidly evolving area of science, and the approach we are taking to discover and develop product candidates is novel and may never lead to approved or marketable products.

•Interim, top-line, initial and preliminary data from our clinical trials that we announce or publish from time to time may change as more patient data become available and are subject to confirmation, audit, and verification procedures that could result in material changes in the final data.

•If we experience delays or difficulties in the enrollment of patients in clinical trials, our receipt of necessary regulatory approvals could be delayed or prevented.

•Results from early preclinical studies and clinical trials of our programs and product candidates are not necessarily predictive of the results of later preclinical studies and clinical trials of our programs and product candidates. If we cannot replicate the results from earlier preclinical studies and clinical trials of our programs and product candidates in our later preclinical studies and clinical trials, we may be unable to successfully develop, obtain regulatory approval for and commercialize our product candidates.

•Our clinical trials or those of our future collaborators may reveal significant adverse events not seen in prior preclinical studies or clinical trials and may result in a safety profile that could inhibit regulatory approval or market acceptance of any of our product candidates.

•Some of our product candidates modulate pathways for which there are currently no approved or effective therapies, which may result in greater research and development expenses, regulatory issues that could delay or prevent approval, or discovery of unknown or unanticipated adverse effects on safety or efficacy.

•We are currently conducting clinical trials for bitopertin in Australia and may in the future conduct additional clinical trials of our product candidates outside the United States, and the FDA and comparable foreign regulatory authorities may not accept data from such trials.

•If we are not able to obtain, or if there are delays in obtaining, required regulatory approvals for our product candidates, we will not be able to commercialize, or will be delayed in commercializing, our product candidates, and our ability to generate revenue will be materially impaired.

•We face substantial competition, which may result in others discovering, developing or commercializing products before or more successfully than we do.

•If our current product candidates or any future product candidates do not achieve broad market acceptance, the revenue that we generate from our sales may be limited, and we may never become profitable.

•We rely on third parties to conduct our Phase 2 clinical trials of bitopertin, Phase 1b/2 clinical trials of DISC-0974 and Phase 1 clinical trial of DISC-3405 (formerly MWTX-003) and expect to rely on third parties to conduct our planned APOLLO clinical trial of bitopertin and other clinical trials for our product candidates, as well as potential investigator-sponsored clinical

3

trials of our product candidates. If these third parties do not successfully carry out their contractual duties, comply with regulatory requirements, meet expected deadlines, or if the prior work conducted by these third parties is incomplete, we may not be able to obtain regulatory approval for or commercialize our product candidates and our business could be substantially harmed.

•We might not realize the anticipated benefits of our current collaborations with Mabwell or NIH, or any other collaborations we enter into in the future.

•We contract with third parties for the manufacture of our product candidates for preclinical development and clinical testing and expect to continue to do so for commercialization. This reliance on third parties increases the risk that we will not have sufficient quantities of our product candidates or products or such quantities at an acceptable cost, which could delay, prevent, or impair our development or commercialization efforts.

•If we are unable to obtain and maintain patent and other intellectual property protection for our technology and product candidates, or if the scope of the intellectual property protection obtained is not sufficiently broad, our competitors could develop and commercialize technology and drugs similar or identical to ours, and our ability to successfully commercialize our technology and drugs may be impaired, and we may not be able to compete effectively in our market.

•We may not obtain or grant licenses or sublicenses to intellectual property rights in all markets on equally or sufficiently favorable terms with third parties.

•Intellectual property rights do not guarantee commercial success of current or future product candidates or other business activities. Numerous factors may limit any potential competitive advantage provided by our intellectual property rights.

•Obtaining and maintaining regulatory approval of our product candidates in one jurisdiction does not mean that we will be successful in obtaining regulatory approval of our product candidates in other jurisdictions.

•We may seek approval from the FDA for bitopertin or any of our other current or future product candidates through the use of the Accelerated Approval Program. If we are not able to use such program, we may be required to conduct additional clinical trials beyond those that are contemplated, which would increase the expense of obtaining, and delay the receipt of, necessary marketing approvals, if we receive them at all. In addition, even if the Accelerated Approval Program is available to us, it may not lead to expedited approval of our product candidates, or approval at all.

•Our future success depends on our ability to retain key executives and experienced scientists and to attract, retain, and motivate qualified personnel.

•Adverse developments affecting the financial services industry, such as actual events or concerns involving liquidity, defaults, or non-performance by financial institutions or transactional counterparties, could adversely affect the Company’s current and projected business operations and its financial condition and results of operations.

•Unfavorable global economic conditions could adversely affect our business, financial condition or results of operations.

•The market price of our common stock is expected to be volatile.

•We will continue to incur increased costs and increased demands upon management as a result of complying with the laws and regulations affecting public companies.

•Once we are no longer an emerging growth company, a smaller reporting company or otherwise no longer qualify for applicable exemptions, we will be subject to additional laws and regulations affecting public companies that will increase our costs and the demands on management and could harm our operating results.

•Provisions in our charter documents and under Delaware law could make an acquisition of us more difficult and may discourage any takeover attempts our stockholders may consider favorable, and may lead to entrenchment of management.

This section contains forward-looking statements. You should refer to the explanation of the qualifications and limitations on forward-looking statements beginning on page 1.

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PART I—FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

DISC MEDICINE, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except share and per share amounts)

(Unaudited)

	September 30, 2024			December 31, 2023
Assets
Current assets:
Cash and cash equivalents	$	192,638		$	360,382
Marketable securities		294,725			—
Prepaid expenses and other current assets		5,789			5,280
Total current assets		493,152			365,662
Property and equipment, net		79			170
Right-of-use assets, operating leases		1,678			1,930
Other assets		236			234
Total assets	$	495,145		$	367,996
Liabilities and Stockholders’ Equity
Current liabilities:
Accounts payable	$	3,553		$	12,629
Accrued external research and development expenses		16,332			1,986
Other accrued expenses		5,512			6,159
Operating lease liabilities, current		76			665
Total current liabilities		25,473			21,439
Operating lease liabilities, non-current		1,712			1,436
Total liabilities		27,185			22,875
Commitments and contingencies (Note 14)
Stockholders’ equity:
Common stock, $0.0001 par value; 100,000,000 shares authorized as of September 30, 2024 and December 31, 2023; 29,748,154 and 24,360,233 shares issued and outstanding as of September 30, 2024 and December 31, 2023, respectively		3			2
Additional paid-in capital		735,761			533,764
Accumulated other comprehensive income		741			—
Accumulated deficit		(268,545	)		(188,645	)
Total stockholders’ equity		467,960			345,121
Total liabilities and stockholders’ equity	$	495,145		$	367,996

The accompanying notes are an integral part of these condensed consolidated financial statements.

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DISC MEDICINE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS

(In thousands, except share and per share amounts)

(Unaudited)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2024			2023			2024			2023
Operating expenses:
Research and development	$	24,685		$	14,419		$	71,874		$	46,699
General and administrative		8,171			4,539			23,296			14,712
Total operating expenses		32,856			18,958			95,170			61,411
Loss from operations		(32,856	)		(18,958	)		(95,170	)		(61,411	)
Other income (expense), net:
Interest income		6,362			4,843			15,454			10,120
Change in fair value of contingent value right liability		—			—			—			(1,500	)
Other income (expense)		9			13			(5	)		8
Total other income (expense), net		6,371			4,856			15,449			8,628
Loss before income taxes		(26,485	)		(14,102	)		(79,721	)		(52,783	)
Income tax expense		(114	)		(20	)		(179	)		(67	)
Net loss	$	(26,599	)	$	(14,122	)	$	(79,900	)	$	(52,850	)
Net loss attributable to common stockholders-basic and diluted	$	(26,599	)	$	(14,122	)	$	(79,900	)	$	(52,850	)
Weighted-average common shares outstanding-basic and diluted		29,935,551			24,316,817			26,809,605			21,605,202
Net loss per share attributable to common stockholders-basic and diluted	$	(0.89	)	$	(0.58	)	$	(2.98	)	$	(2.45	)
Comprehensive loss:
Net loss	$	(26,599	)	$	(14,122	)	$	(79,900	)	$	(52,850	)
Other comprehensive income:
Foreign currency translation adjustments		(48	)		—			(42	)		—
Unrealized gain on marketable securities		849			—			783			—
Total other comprehensive income		801			—			741			—
Comprehensive loss	$	(25,798	)	$	(14,122	)	$	(79,159	)	$	(52,850	)

The accompanying notes are an integral part of these condensed consolidated financial statements.

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DISC MEDICINE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(In thousands, except share and per share amounts)

(Unaudited)

	Common Stock $0.0001 Par Value				Additional Paid-In		Accumulated Other Comprehensive			Accumulated			Total Stockholders’
	Shares		Amount		Capital		Income (Loss)			Deficit			Equity
Balance at December 31, 2023		24,360,233	$	2	$	533,764	$	—		$	(188,645	)	$	345,121
Issuance of common stock upon exercise of stock options		95,467		—		806		—			—			806
Stock-based compensation expense		—		—		4,058		—			—			4,058
Sale of common stock in at-the-market offerings,    net of issuance costs of $518		234,449		—		14,790		—			—			14,790
Issuance of common stock under employee stock purchase plan		5,736		—		245		—			—			245
Net loss		—		—		—		—			(26,949	)		(26,949	)
Balance at March 31, 2024		24,695,885	$	2	$	553,663	$	—		$	(215,594	)	$	338,071
Issuance of common stock upon exercise of stock options		68,112		—		567		—			—			567
Stock-based compensation expense		—		—		4,091		—			—			4,091
Sale of common stock in registered direct offering,    net of issuance costs of $5,472		4,944,000		1		172,511		—			—			172,512
Foreign currency translation adjustments		—		—		—		6			—			6
Unrealized loss on marketable securities		—		—		—		(66	)		—			(66	)
Net loss		—		—		—		—			(26,352	)		(26,352	)
Balance at June 30, 2024		29,707,997	$	3	$	730,832	$	(60	)	$	(241,946	)	$	488,829
Issuance of common stock upon exercise of stock options		34,811		—		401		—			—			401
Stock-based compensation expense		—		—		4,332		—			—			4,332
Issuance of common stock under employee stock purchase plan		5,346		—		196		—			—			196
Foreign currency translation adjustments		—		—		—		(48	)		—			(48	)
Unrealized gain on marketable securities		—		—		—		849			—			849
Net loss		—		—		—		—			(26,599	)		(26,599	)
Balance at September 30, 2024		29,748,154	$	3	$	735,761	$	741		$	(268,545	)	$	467,960

The accompanying notes are an integral part of these condensed consolidated financial statements.

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DISC MEDICINE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (Continued)

(In thousands, except share and per share amounts)

(Unaudited)

	Common Stock $0.0001 Par Value				Additional Paid-In		Accumulated Other Comprehensive		Accumulated			Total Stockholders’
	Shares		Amount		Capital		Income (Loss)		Deficit			Equity
Balance at December 31, 2022		17,403,315	$	2	$	288,814	$	—	$	(112,216	)	$	176,600
Issuance of common stock upon exercise of stock options		74,753		—		1,067		—		—			1,067
Vesting of restricted common stock		958		—		—		—		—			—
Stock-based compensation expense		—		—		1,024		—		—			1,024
Sale of common stock in registered direct offering,    net of issuance costs of $80		1,488,166		—		34,148		—		—			34,148
Sale of pre-funded warrants in registered direct offering,    net of issuance costs of $66		—		—		28,206		—		—			28,206
Sale of common stock in at-the-market offerings,    net of issuance costs of $408		608,050		—		14,591		—		—			14,591
Net loss		—		—		—		—		(22,781	)		(22,781	)
Balance at March 31, 2023		19,575,242	$	2	$	367,850	$	—	$	(134,997	)	$	232,855
Issuance of common stock upon exercise of stock options		41,475		—		242		—		—			242
Vesting of restricted common stock		958		—		—		—		—			—
Stock-based compensation expense		—		—		1,309		—		—			1,309
Sale of common stock in follow-on public offering,    net of issuance costs of $9,272		3,015,919		—		138,508		—		—			138,508
Sale of pre-funded warrants in follow-on public offering,    net of issuance costs of $627		—		—		9,373		—		—			9,373
Sale of common stock in at-the-market offerings,    net of issuance costs of $119		217,300		—		4,879		—		—			4,879
Net loss		—		—		—		—		(15,947	)		(15,947	)
Balance at June 30, 2023		22,850,894	$	2	$	522,161	$	—	$	(150,944	)	$	371,219
Issuance of common stock upon exercise of stock options		58,963		—		607		—		—			607
Stock-based compensation expense		—		—		1,270		—		—			1,270
Issuance of common stock upon exercise of warrants		1,229,221		—		—		—		—			—
Net loss		—		—		—		—		(14,122	)		(14,122	)
Balance at September 30, 2023		24,139,078	$	2	$	524,038	$	—	$	(165,066	)	$	358,974

The accompanying notes are an integral part of these condensed consolidated financial statements.

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DISC MEDICINE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

(Unaudited)

	Nine Months Ended September 30,
	2024			2023
Cash flows from operating activities
Net loss	$	(79,900	)	$	(52,850	)
Adjustments to reconcile net loss to net cash used in operations:
Depreciation and amortization		147			75
Stock-based compensation		12,481			3,603
Amortization/accretion of investment securities		(3,092	)		—
Change in fair value of contingent value right liability		—			1,500
Noncash lease expense		324			180
Other non-cash items		(42	)		—
Changes in operating assets and liabilities:
Prepaid expenses and other current assets		(509	)		341
Accounts payable		(9,076	)		(7,710	)
Accrued external research and development expenses		14,346			132
Other accrued expenses		(647	)		(849	)
Operating lease liabilities		(385	)		(88	)
Net cash used in operating activities		(66,353	)		(55,666	)
Cash flows from investing activities
Purchases of property and equipment		(56	)		(86	)
Purchases of marketable securities		(313,850	)		—
Maturities of marketable securities		23,000			—
Net cash used in investing activities		(290,906	)		(86	)
Cash flows from financing activities
Proceeds from sale of common stock in offerings, net of issuance costs paid		172,512			192,126
Proceeds from sale of pre-funded warrants in offerings, net of issuance costs paid		—			37,579
Proceeds from sale of common stock in at-the-market offerings, net of issuance costs paid		14,790			—
Proceeds from stock option exercises		1,774			1,916
Contributions from employee stock purchase plan		441			—
Net cash provided by financing activities		189,517			231,621
Net (decrease) increase in cash, cash equivalents and restricted cash		(167,742	)		175,869
Cash, cash equivalents and restricted cash, beginning of period		360,616			194,788
Cash, cash equivalents and restricted cash, end of period	$	192,874		$	370,657
Supplemental cash flow information
Cash paid for income taxes	$	37		$	78
Supplemental disclosure of non-cash activities
Right-of-use assets obtained in exchange for new operating lease liabilities	$	—		$	1,106
Net increase (decrease) in right-of-use assets related to lease modifications and reassessment events	$	72		$	(422	)
Net increase (decrease) in operating lease liabilities related to lease modifications and reassessment events	$	72		$	(392	)
Deferred issuance costs on sale of common stock and pre-funded warrants in offerings included in accounts payable and accrued expenses	$	—		$	215

The accompanying notes are an integral part of these condensed consolidated financial statements.

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DISC MEDICINE, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1. Organization and Nature of the Business

Disc Medicine, Inc. (together with its subsidiaries, the “Company”) is a clinical-stage biopharmaceutical company focused on the discovery, development, and commercialization of novel treatments for patients suffering from serious hematologic diseases. The Company has assembled a portfolio of clinical and preclinical product candidates that aim to modify fundamental biological pathways associated with the formation and function of red blood cells, specifically heme biosynthesis and iron homeostasis. The Company’s current pipeline includes bitopertin for the treatment of erythropoietic porphyrias (“EPs”) including erythropoietic protoporphyria (“EPP”), X-linked protoporphyria (“XLP”), and Diamond-Blackfan Anemia (“DBA”); DISC-0974 for the treatment of anemia of myelofibrosis (“MF”) and anemia of chronic kidney disease (“CKD”); and DISC-3405 for the treatment of polycythemia vera (“PV”) and other hematologic disorders. In addition, the Company’s preclinical programs include DISC-0998 for the treatment of anemia associated with inflammatory diseases. The Company’s approach to product candidate development leverages well-understood molecular mechanisms that have been validated in humans. The Company believes that each of its product candidates, if approved, has the potential to improve the lives of patients suffering from hematologic diseases. The Company was founded in October 2017. The Company’s principal offices are in Watertown, Massachusetts.

The Company is subject to a number of risks and uncertainties common to development stage companies in the biotechnology industry, including, but not limited to, risks associated with completing preclinical studies and clinical trials, receiving regulatory approvals for product candidates, development by competitors of new biopharmaceutical products, dependence on key personnel, reliance on third-party organizations, protection of proprietary technology, compliance with government regulations, the impact of public health crises such as pandemics and the ability to secure additional capital to fund operations. The Company’s research and development programs will require significant additional research and development efforts, including preclinical and clinical testing and regulatory approval, prior to commercialization. Even if the Company’s product development efforts are successful, it is uncertain when, if ever, the Company will realize revenue from product sales.

Liquidity and Capital Resources

The Company’s condensed consolidated financial statements have been prepared on the basis of the Company continuing as a going concern. The Company expects that its existing cash, cash equivalents, and marketable securities as of September 30, 2024 of $487.4 million will enable the Company to fund its planned operating expense and capital expenditure requirements for at least twelve months from the date of issuance of these condensed consolidated financial statements. The Company has incurred recurring losses and negative cash flows from operations since inception. As of September 30, 2024, the Company had an accumulated deficit of $268.5 million. The Company expects its operating losses and negative operating cash flows to continue into the foreseeable future. The future viability of the Company is dependent on its ability to generate cash from operating activities or to raise additional capital to finance its operations. There can be no assurance that the Company will ever earn revenues or achieve profitability, or if achieved, that the revenues or profitability will be sustained on a continuing basis. In addition, the Company’s preclinical and clinical development activities, manufacturing and commercialization of the Company’s product candidates, if approved, will require significant additional financing.

2. Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

The significant accounting policies used in preparation of the condensed consolidated financial statements are described in the Company’s audited consolidated financial statements as of and for the year ended December 31, 2023 and the notes thereto, which are included in the Company’s Annual Report on Form 10-K.

Basis of Presentation and Principles of Consolidation

The accompanying condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation.

The Company’s condensed consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles (“GAAP”). Any reference in these notes to applicable guidance is meant to refer to the authoritative accounting principles generally accepted in the United States as found in the Accounting Standard Codification (“ASC”) and Accounting Standards Updates (“ASU”) of the Financial Accounting Standards Board (“FASB”).

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Unaudited Interim Condensed Consolidated Financial Information

The accompanying condensed consolidated financial statements as of September 30, 2024 and for the three and nine months ended September 30, 2024 and 2023 are unaudited. The financial data and other information contained in the notes hereto as of September 30, 2024 and for the three and nine months ended September 30, 2024 and 2023 are also unaudited. The condensed consolidated balance sheet data as of December 31, 2023 was derived from the Company’s audited consolidated financial statements included in the Company’s Annual Report on Form 10-K.

The unaudited interim condensed consolidated financial statements have been prepared on the same basis as the audited annual consolidated financial statements, and in the opinion of management, reflect all adjustments, which include only normal recurring adjustments necessary for the fair presentation of the Company’s financial position as of September 30, 2024 and the results of its operations and cash flows for the three and nine months ended September 30, 2024 and 2023. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements as of and for the year ended December 31, 2023, and the notes thereto, included in the Company’s Annual Report on Form 10-K.

The results for the three and nine months ended September 30, 2024 and 2023 are not necessarily indicative of results to be expected for the full years, or any other interim periods, or any future year or period.

Use of Estimates

The preparation of the Company’s condensed consolidated financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of expenses during the reporting period. Significant estimates and assumptions reflected in these condensed consolidated financial statements include, but are not limited to accrued research and development expenses; stock-based compensation expense; the fair value determinations for instruments accounted for at fair value; the fair value of the contingent value right (“CVR”) (see Note 3); the incremental borrowing rate for determining lease liabilities and right-of-use assets; and income taxes. The Company bases its estimates on historical experience, known trends and other market-specific or other relevant factors that it has concluded to be reasonable under the circumstances. On an ongoing basis, management evaluates its estimates as there are changes in circumstances, facts and experience. Changes in estimates are recorded in the period in which they become known. Actual results may differ materially from those estimates or assumptions.

Concentration of Credit Risk and of Significant Suppliers

Financial instruments that potentially subject the Company to significant concentrations of credit risk consist primarily of cash, cash equivalents, and marketable securities. The Company maintains deposits in federally insured financial institutions in excess of federally insured limits and limits its exposure to cash risk by placing its cash with high credit quality accredited financial institutions. The Company has concluded that it is not subject to unusual credit risk beyond the normal credit risk associated with commercial banking relationships.

The Company relies, and expects to continue to rely, on a small number of vendors to manufacture supplies and to process its product candidates for its development programs. These programs could be adversely affected by a significant interruption in the manufacturing process or supply chain.

Comprehensive Income (Loss)

Comprehensive income (loss) is the change in equity of a business enterprise during a period from transactions and other events and circumstances from non-owner sources. Comprehensive income (loss) includes net income (loss) and the change in accumulated other comprehensive income (loss) for the period. Accumulated other comprehensive income (loss) consisted of foreign currency translation adjustments and unrealized gains (losses) on available-for-sale marketable securities during the three and nine months ended September 30, 2024 and 2023.

Marketable Securities

The Company classifies its marketable securities as available-for-sale. All of the Company’s marketable securities are available to the Company for use in current operations. As a result, the Company classified all of these securities as current assets even though the stated maturity of some individual securities may be one year or more beyond the balance sheet date. Marketable securities are maintained by an investment manager and consist of U.S. government securities. Marketable securities are carried at fair value with the unrealized gains and losses included in accumulated other comprehensive income (loss) as a component of stockholders’ equity until realized. Any premium or discount arising at purchase is amortized and/or accreted to interest income and/or expense over the life of the underlying marketable security.

Although available to be sold to meet operating needs or otherwise, securities are generally held through maturity. The cost of securities sold is determined on a specific identification basis, and realized gains and losses are included in other income (expense), net within the condensed consolidated statements of operations and comprehensive loss.

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The Company reviews its portfolio of available-for-sale securities, using both quantitative and qualitative factors, to determine if declines in fair value below cost have resulted from a credit loss or other factors. If the decline in fair value is due to credit loss factors, a loss is recognized. To date, the Company has not experienced any credit losses and does not expect it is exposed to any significant credit risk on these investments.

Recently Issued Accounting Pronouncements Not Yet Adopted

Other accounting standards that have been issued or proposed by the FASB or other standards-setting bodies that do not require adoption until a future date are not expected to have a material impact on the Company’s condensed consolidated financial statements upon adoption.

3. Fair Value Measurements

The following tables present information about the Company’s assets and liabilities that are regularly measured and carried at fair value on a recurring basis and indicate the level within the fair value hierarchy of the valuation techniques the Company utilized to determine such fair value, which is described further within Note 2 to the consolidated financial statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023.

Financial assets and liabilities measured at fair value on a recurring basis are summarized as follows (in thousands):

	September 30, 2024
	Level 1		Level 2		Level 3
Assets
Cash equivalents:
Money market funds	$	65,006	$	—	$	—
U.S. treasury securities		—		116,104		—
Total cash equivalents		65,006		116,104		—
Marketable securities:
U.S. treasury securities		—		188,007		—
U.S. government agency securities		—		106,718		—
Total marketable securities		—		294,725		—
Total assets	$	65,006	$	410,829	$	—

	December 31, 2023
	Level 1		Level 2		Level 3
Assets
Cash equivalents:
Money market funds	$	55,001	$	—	$	—
U.S. treasury securities		—		255,419		—
Total cash equivalents		55,001		255,419		—
Total assets	$	55,001	$	255,419	$	—

The fair value of the Company’s Level 1 cash equivalents, consisting of money market funds, is based on quoted market prices in active markets with no valuation adjustment. The fair value of the Company’s Level 2 cash equivalents and marketable securities, consisting of U.S. treasury and U.S. government agency securities, with original maturities of three months or less and twelve months or less, respectively, are determined through third-party pricing services. The amortized cost of the cash equivalents approximates the fair value. There have been no impairments of the Company’s assets measured and carried at fair value nor changes in valuation techniques during the three and nine months ended September 30, 2024 and 2023. The Company did not have any non-recurring fair value measurements on any assets or liabilities during the three and nine months ended September 30, 2024 and 2023.

On August 9, 2022, Gemini Therapeutics, Inc., a Delaware corporation (“Gemini”), Gemstone Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Gemini (“Merger Sub”), and Disc Medicine, Inc., a Delaware corporation (“Private Disc”), entered into an Agreement and Plan of Merger and Reorganization (the “Merger Agreement”). The merger was completed on December 29, 2022. As described in Note 1 to the consolidated financial statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023, in connection with the merger, the stockholders of Gemini at the effective time of the merger received a CVR to receive consideration from the Company upon its receipt of certain proceeds, resulting from a disposition of Gemini’s pre-merger assets within one year after the closing of the merger, calculated in accordance with the Contingent Value Rights Agreement (the "CVR Agreement"). The disposition period ended December 29, 2023 and no dispositions of Gemini's pre-merger assets were made during the disposition period. Therefore, the CVR obligation no longer existed as of September 30, 2024 and December 31, 2023, respectively.

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The following table provides a summary of changes in fair value of the CVR liability for the nine months ended September 30, 2023 (in thousands):

	Level 3 Rollforward
Balance at December 31, 2022	$	—
Change in fair value of contingent value right liability		—
Balance at March 31, 2023		—
Change in fair value of contingent value right liability		1,500
Balance at June 30, 2023		1,500
Change in fair value of contingent value right liability		—
Balance at September 30, 2023	$	1,500

4. Marketable Securities

Marketable securities as of September 30, 2024 consisted of the following (in thousands):

			Gross Unrealized
	Amortized Cost		Gains		Losses			Estimated Fair Value
Marketable securities available-for-sale:
U.S. treasury securities	$	187,490	$	519	$	(2	)	$	188,007
U.S. government agency securities		106,452		266		—			106,718
Total available-for-sale securities	$	293,942	$	785	$	(2	)	$	294,725

Marketable securities as of December 31, 2023 were zero. As of September 30, 2024, all marketable securities had an original maturity date of twelve months or less. The aggregate fair value of marketable securities with unrealized losses was $7.0 million as of September 30, 2024 and zero as of December 31, 2023. As of September 30, 2024 and December 31, 2023, one investment and no investments, respectively, were in an unrealized loss position. All such investments have been in an unrealized loss position for less than a year and these losses are considered temporary. The Company has the ability and intent to hold these investments until a recovery of their amortized cost, which may not occur until maturity. The Company expects that U.S. treasury and U.S. government agency securities are subject to minimal credit risk. As a result, the Company did not record any charges for credit-related impairments for its available-for-sale securities for the three and nine months ended September 30, 2024 and 2023.

5. Cash, Cash Equivalents and Restricted Cash

Cash, cash equivalents and restricted cash consisted of the following (in thousands):

	September 30,		December 31,
	2024		2023
Cash and cash equivalents	$	192,638	$	360,382
Restricted cash		236		234
Total cash, cash equivalents and restricted cash as shown on the condensed    consolidated statements of cash flows	$	192,874	$	360,616

The Company's restricted cash balance, which is classified within other assets on the condensed consolidated balance sheets, consists of letters of credit related to leased and subleased office space in Watertown, Massachusetts. The Company is required to maintain a separate cash balance to secure its letters of credit.

6. Property and Equipment, Net

Property and equipment, net consisted of the following (in thousands):

	September 30,			December 31,
	2024			2023
Computer equipment	$	231		$	231
Furniture and fixtures		240			184
Less: Accumulated depreciation		(392	)		(245	)
Property and equipment, net	$	79		$	170

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7. Other Accrued Expenses

Other accrued expenses consisted of the following (in thousands):

	September 30,		December 31,
	2024		2023
Accrued employee-related expenses	$	4,567	$	5,790
Accrued professional fees		708		317
Accrued other		237		52
Total accrued expenses	$	5,512	$	6,159

8. Development and License Agreements

License and Stock Purchase Agreement with AbbVie Deutschland GmbH & Co. KG (“AbbVie”)

In September 2019, the Company entered into an agreement with AbbVie, pursuant to which AbbVie granted the Company an exclusive license, with the right to grant sublicenses, to certain AbbVie intellectual property.

Under this agreement, the Company paid a non-refundable, non-creditable upfront fee of $0.6 million. The Company is also obligated to make future payments upon the achievement of certain development, commercialization and sales-based milestones up to $18.0 million, $45.0 million and $87.5 million, respectively on a licensed product-by-licensed product basis. In addition, the Company is also obligated to pay royalties based on net sales of the licensed products on a licensed product-by-licensed product and country-by-country basis. As of September 30, 2024, none of the milestones had been achieved.

The Company’s royalty obligation expires on a licensed product-by-licensed product and country-by-country basis upon the expiration of the last-to-expire valid claim under the licensed intellectual property rights in such country. Unless terminated earlier, the agreement expires upon the expiration of the Company’s royalty obligation for all licensed products. AbbVie can terminate the agreement if the Company fails to make any payments within a specified period after receiving written notice of such failure, or in the event of a material breach by the Company and failure to cure such breach within a certain period of time.

License Agreement with F. Hoffmann-La Roche Ltd and Hoffmann-La Roche Inc. (collectively “Roche”)

In connection with a license agreement with Roche, (the "Roche Agreement"), the Company paid Roche an upfront, non-refundable exclusivity payment of $0.5 million in March 2021. Upon execution of the Roche Agreement in May 2021, the Company paid Roche an additional upfront, non-refundable payment of $4.0 million.

The Company is obligated to make contingent payments to Roche up to an aggregate of $50.0 million in development and regulatory milestone payments for development and approval in a first indication and up to an aggregate of $35.0 million in development and regulatory milestone payments for development and approval in a second indication. The Company is also obligated to make contingent payments to Roche up to an aggregate of $120.0 million based on achievement of certain thresholds for annual net sales of licensed products. As of September 30, 2024, none of the milestones had been achieved. Roche is also eligible to receive tiered royalties on net sales of commercialized products, at rates ranging from high single-digits to high teens.

License Agreement with Mabwell Therapeutics, Inc. (“Mabwell”)

In January 2023, the Company entered into an exclusive license agreement with Mabwell, pursuant to which Mabwell granted the Company an exclusive and sublicensable license to certain Mabwell intellectual property.

In connection with the agreement, the Company paid Mabwell an upfront payment of $10.0 million in March 2023. In October 2023, the Company dosed the first patient in the Phase 1 clinical trial for DISC-3405, resulting in a milestone payment of $5.0 million due to Mabwell. In addition, the Company is obligated to pay certain development and regulatory milestone payments for the licensed products, for up to three indications, up to a maximum aggregate amount of $127.5 million, as well as certain commercial milestone payments for certain licensed product net sales achievements, up to a maximum aggregate amount of $275.0 million. The Company is further obligated to pay a tiered percentage of revenue that the Company receives from its sublicensees ranging from a low third decile percentage to a low first decile percentage. In addition, the Company is obligated to pay Mabwell a royalty on annual net sales of all licensed products at a tiered rate ranging from low single-digits to high single-digits.

During the three and nine months ended September 30, 2024, the Company recorded less than $0.1 million of research and development expense related to its arrangement with Mabwell. During the three and nine months ended September 30, 2023, the Company recorded research and development expense related to its arrangement with Mabwell of zero and $10.0 million, respectively.

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9. Convertible Preferred Stock

As of September 30, 2024 and December 31, 2023, the Company was authorized to issue up to 10,000,000 shares of preferred stock at a par value of $0.0001, with no shares issued or outstanding.

10. Common Stock

As of September 30, 2024 and December 31, 2023, the authorized capital stock of the Company included 100,000,000 shares of common stock, $0.0001 par value per share. As of September 30, 2024, the Company has 2,972,432 shares of common stock reserved for the exercise of stock options and 204,081 shares of common stock reserved for the exercise of pre-funded warrants.

Underwritten Offering

In June 2024, the Company entered into an underwriting agreement with Leerink Partners related to an underwritten offering of 4,944,000 shares of common stock of the Company, par value $0.0001 per share, at a price to the public of $36.00 per share. The Company received net proceeds of $172.5 million, after deducting the underwriting discount and offering expenses of $5.5 million.

Follow-On Public Offering

In June 2023, the Company issued 3,015,919 shares of its common stock upon the completion of its public follow-on offering, which included the exercise in full by the underwriters of their option to purchase up to 420,000 additional shares of common stock, at a public offering price of $49.00 per share. The Company also sold, in lieu of shares of the Company’s common stock, pre-funded warrants to purchase an aggregate of 204,081 shares of common stock at a price of $48.9999 per pre-funded warrant. The Company received aggregate net proceeds of $147.9 million, after deducting offering expenses of $9.9 million.

The pre-funded warrants provide that the holder will not have the right to exercise any portion of its warrants if such holder, together with its affiliates, would beneficially own in excess of 24.99% of the number of shares of Common Stock outstanding immediately after giving effect to the exercise (the “Ownership Limit”). Purchasers of the pre-funded warrants may also elect to set the initial Ownership Limit at 4.99%, 9.99% or 19.99%. Upon at least 61 days’ prior notice from the holder to the Company, the holder may increase or decrease the Ownership Limit up to 24.99%, provided however that purchasers that select an Ownership Limit of 19.99% or less will only be allowed to increase the Ownership Limit above 19.99% if such increase would not result in a change of control under the rules and regulations of the Nasdaq Stock Market LLC. The pre-funded warrants meet the condition for equity classification and were therefore recorded as a component of stockholders’ equity within additional paid-in capital.

Registered Direct Offering

In February 2023, the Company entered into a securities purchase agreement, with certain investors. Pursuant to the securities purchase agreement, the Company sold an aggregate of 1,488,166 shares of the Company’s common stock, at a purchase price of $23.00 per share, and with respect to a certain investor, in lieu of shares of the Company’s common stock, pre-funded warrants to purchase an aggregate of 1,229,224 shares of the Company’s common stock, at a purchase price of $22.9999 per pre-funded warrant, for aggregate net proceeds of $62.4 million, after deducting offering expenses of $0.1 million.

The pre-funded warrants provide that the holder will not have the right to exercise any portion of its warrants if such holder, together with its affiliates, would beneficially own in excess of 9.99% of the number of shares of the Company’s common stock outstanding immediately after giving effect to such exercise (the “Beneficial Ownership Limitation”); provided, however, that the holder may increase or decrease the Beneficial Ownership Limitation by giving 61 days’ notice, but not to any percentage in excess of 19.99%. The investors or their affiliates are beneficial holders of more than 5% of the Company’s capital stock. The pre-funded warrants meet the condition for equity classification and were therefore recorded as a component of stockholders’ equity within additional paid-in capital at the time of their issuance. In September 2023, all of the pre-funded warrants were exercised in a cashless transaction which resulted in 1,229,221 shares of common stock being issued to the investor.

ATM Program

In January 2023, the Company filed a shelf registration statement on Form S-3 with the SEC, which covered the offering, issuance and sale by the Company of up to an aggregate of $300.0 million of the Company’s common stock, preferred stock, debt securities, warrants or units (the “January 2023 Shelf”). Subsequently in January 2023, the Company entered into a Sales Agreement (the “Sales Agreement”) with SVB Securities LLC, as sales agent, to provide for the offering, issuance and sale by the Company of up to $100.0 million of the Company’s common stock from time to time in “at-the-market” (“ATM”) offerings under the January 2023 Shelf. Effective June 12, 2023, the ATM program with SVB Securities LLC was suspended. Following the date of the ATM suspension, the Company did not make any further sales of its common stock pursuant to the Sales Agreement. The Sales Agreement was terminated effective September 28, 2023. In connection with the ATM suspension, the Company recognized the remaining capitalized issuance costs of $0.3 million as general and administrative expense in the condensed consolidated statements of operations and comprehensive loss for the nine months ended September 30, 2023. As of September 30, 2023, the Company had sold an aggregate of 825,350 shares of common stock in ATM offerings under the January 2023 Shelf. Aggregate gross proceeds

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from the transactions were $20.0 million and the Company received $19.5 million in net proceeds, after deducting placement agent fees and offering expenses.

In October 2023, the Company entered into an Open Market Sale Agreement with Jefferies LLC as sales agent (the “ATM Agreement”) to provide for the offering, issuance and sale by the Company of up to $59.7 million of the Company’s common stock from time to time in ATM offerings under the January 2023 Shelf.

In November 2023, the Company filed a shelf registration statement on Form S-3 with the SEC, which covered the offering, issuance and sale by the Company of up to an aggregate of $400.0 million of the Company’s common stock, preferred stock, debt securities, warrants or units (the “November 2023 Shelf”). On December 5, 2023, the Company and Jefferies LLC entered into an amendment to the ATM Agreement to increase the aggregate offering price of the shares of common stock that the Company may offer under the ATM Agreement from $59.7 million to $200.0 million. The material terms and conditions of the ATM Agreement otherwise remained unchanged. As of December 31, 2023, the Company had sold an aggregate of 141,914 shares of common stock in ATM offerings under the November 2023 Shelf and pursuant to the ATM Agreement. Aggregate gross proceeds from the transactions were $7.2 million and the Company received $7.0 million in net proceeds, after deducting placement agent fees and offering expenses.

During the three months ended March 31, 2024, the Company sold an aggregate of 234,449 shares of common stock in ATM offerings under the November 2023 Shelf and pursuant to the ATM Agreement. Aggregate gross proceeds from the transactions were $15.3 million and the Company received $14.8 million in net proceeds, after deducting placement agent fees and offering expenses. During the three months ended June 30, 2024 and September 30, 2024, respectively, the Company sold no shares in ATM offerings. As of September 30, 2024, the Company had sold an aggregate of 376,363 shares of common stock in ATM offerings under the November 2023 Shelf for aggregate gross proceeds of $22.5 million and aggregate net proceeds received of $21.8 million, after deducting placement agent fees and offering expenses.

11. Stock-Based Compensation

The Company grants stock-based awards under its 2021 Stock Option and Incentive Plan (the “2021 Plan”), which was approved by its stockholders in February 2021 and amended and restated in January 2023. The Company also has outstanding stock option awards under its 2017 Stock Option and Grant Plan (the “Private Disc Plan”), the 2017 Stock Option and Grant Plan (the “Gemini 2017 Plan”), and the 2021 Inducement Plan, but is no longer granting awards under these plans. The Company also grants awards under its 2021 Employee Stock Purchase Plan (the “2021 ESPP”), which was approved by the Company's stockholders in July 2021 and amended and restated in January 2023. In addition, subject to approval by the Company's board of directors, the Company may grant stock-based awards outside of the 2021 Plan as an inducement to its executives.

Stock-Based Compensation Expense

Total stock-based compensation expense recorded as research and development and general and administrative expenses, respectively, for employees, directors and non-employees is as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024		2023
Research and development	$	1,680	$	455	$	4,909	$	1,167
General and administrative		2,652		815		7,572		2,436
Total stock-based compensation expense	$	4,332	$	1,270	$	12,481	$	3,603

The following table summarizes unrecognized stock-based compensation expense as of September 30, 2024.

	Unrecognized Expense (In Thousands)		Weighted-Average Remaining Period of Recognition (In Years)
Restricted stock units	$	22,517		3.45
Stock options		29,356		2.93
Total unrecognized equity-based compensation expense	$	51,873

Restricted Stock Units

For purposes of calculating stock-based compensation, the Company determines the fair value of the restricted stock units based on the fair value of the Company’s common stock at the time of grant.

On February 7, 2024, the Company granted a restricted stock unit award for 36,666 shares of common stock outside of the 2021 Plan to its newly appointed Chief Financial Officer, Jean Franchi, as an inducement for entering into employment with the Company in accordance with Nasdaq Listing Rule 5635(c)(4). The restricted stock unit award vests with respect to 25% of the

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underlying shares on each of the first, second, third and fourth anniversaries of the vesting date as set by the Company policy, subject to Ms. Franchi’s continued employment with the Company.

On February 26, 2024, the Company granted a restricted stock unit award for 36,666 shares of common stock outside of the 2021 Plan to its newly appointed Chief Commercial Officer, Pamela Stephenson, as an inducement for entering into employment with the Company in accordance with Nasdaq Listing Rule 5635(c)(4). The restricted stock unit award vests with respect to 25% of the underlying shares on each of the first, second, third and fourth anniversaries of the vesting date as set by the Company policy, subject to Ms. Stephenson’s continued employment with the Company.

On September 16, 2024, the Company granted a restricted stock unit award for 36,666 shares of common stock outside of the 2021 Plan to its newly appointed Chief Regulatory Officer, Dr. Steven Caffé, as an inducement for entering into employment with the Company in accordance with Nasdaq Listing Rule 5635(c)(4). The restricted stock unit award vests with respect to 25% of the underlying shares on each of the first, second, third and fourth anniversaries of the vesting date as set by the Company policy, subject to Dr. Caffé’s continued employment with the Company.

The following table summarizes restricted stock unit activity for the nine months ended September 30, 2024.

	Number of Units			Weighted- Average Grant Date Fair Value
Restricted stock units as of December 31, 2023		—		$	—
Granted		440,562			61.38
Forfeited		(11,040	)		63.90
Restricted stock units as of September 30, 2024		429,522		$	61.31

Stock Options

For purposes of calculating stock-based compensation, the Company estimates the fair value of stock options on the grant date using the Black-Scholes option-pricing model. This model incorporates various assumptions, including the expected volatility, expected term, and interest rates.

On February 7, 2024, the Company granted an option to purchase 55,000 shares of common stock outside of the 2021 Plan to its newly appointed Chief Financial Officer, Jean Franchi, as an inducement for entering into employment with the Company in accordance with Nasdaq Listing Rule 5635(c)(4). The option award has a ten-year term, with 25% of the underlying shares vesting and becoming exercisable on February 7, 2025, and the balance of the option award vesting in equal monthly installments over 36 months thereafter, subject to Ms. Franchi’s continued employment with the Company, and has an exercise price of $65.25.

On February 26, 2024, the Company granted an option to purchase 55,000 shares of common stock outside of the 2021 Plan to its newly appointed Chief Commercial Officer, Pamela Stephenson, as an inducement for entering into employment with the Company in accordance with Nasdaq Listing Rule 5635(c)(4). The option award has a ten-year term, with 25% of the underlying shares vesting and becoming exercisable on February 26, 2025, and the balance of the option award vesting in equal monthly installments over 36 months thereafter, subject to Ms. Stephenson’s continued employment with the Company, and has an exercise price of $64.66.

On September 16, 2024, the Company granted an option to purchase 55,000 shares of common stock outside of the 2021 Plan to its newly appointed Chief Regulatory Officer, Dr. Steven Caffé, as an inducement for entering into employment with the Company in accordance with Nasdaq Listing Rule 5635(c)(4). The option award has a ten-year term, with 25% of the underlying shares vesting and becoming exercisable on September 16, 2025, and the balance of the option award vesting in equal monthly installments over 36 months thereafter, subject to Dr. Caffé’s continued employment with the Company, and has an exercise price of $47.68.

The following table summarizes stock option activity for the nine months ended September 30, 2024.

	Number of Options			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (In Years)		Aggregate Intrinsic Value (In Thousands)
Outstanding at December 31, 2023		2,459,037		$	13.82		7.81	$	109,078
Granted		796,140			59.76
Exercised		(198,390	)		8.99
Forfeited		(71,691	)		44.79
Expired		(12,664	)		110.57
Outstanding at September 30, 2024		2,972,432		$	25.29		7.77	$	80,424
Exercisable at September 30, 2024		1,571,812		$	13.53		6.93	$	57,338

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The aggregate intrinsic value of options is calculated as the difference between the exercise price of the stock options and the fair value of the Company’s common stock for those stock options that had exercise prices lower than the fair value of the common stock as of the end of the period. The aggregate intrinsic value of stock options exercised during the nine months ended September 30, 2024 and 2023 was $8.3 million and $4.5 million, respectively. The total fair value of options vested during the nine months ended September 30, 2024 and 2023 was $7.9 million and $2.9 million, respectively.

The weighted-average assumptions used to estimate the fair value of stock options granted were as follows:

	Nine Months Ended September 30,
	2024			2023
Risk-free interest rate		3.99	%		3.87	%
Expected term (in years)		6.39			7.14
Expected volatility		59	%		59	%
Expected dividend yield		0	%		0	%
Fair value per share of common stock	$	59.76		$	41.48

The weighted-average grant-date fair value of options granted during the nine months ended September 30, 2024 and 2023 was $35.55 and $25.68, respectively.

Shares of Restricted Common Stock

As of September 30, 2024, the Company had issued 63,061 shares of restricted common stock to the founders of Disc Medicine, Inc. prior to the merger (now known as Disc Medicine OpCo, Inc.), pursuant to subscription agreements and to certain key employees pursuant to the Private Disc Plan at $0.0001 per share. The stock restrictions relate to the sale and transferability of the stock and lapse over the defined vesting period in the restricted stock agreement. The vesting period is generally contingent upon continued employment or consulting services being provided to the Company. In the event of termination, the Company has the right, but not the obligation to repurchase the unvested shares at the original purchase price. As of September 30, 2024, these awards of restricted common stock were fully vested.

A summary of restricted common stock activity is as follows:

	Nine Months Ended September 30,
	2024		2023
Unvested at the beginning of the year		—		1,916
Vested		—		(1,916	)
Unvested at the end of the period		—		—

Employee Stock Purchase Plan

During the nine months ended September 30, 2024 and 2023, 11,082 shares and zero shares of common stock were issued under the 2021 ESPP, respectively.

12. Income Taxes

The Company did not record a provision or benefit for federal income taxes during the three and nine months ended September 30, 2024 and 2023. The Company recorded state income tax expense of $0.2 million and less than $0.1 million for the nine months ended September 30, 2024 and 2023, respectively, due to interest income. The Company continues to maintain a full valuation allowance against all of its deferred tax assets.

The Company has evaluated the positive and negative evidence involving its ability to realize its deferred tax assets and has considered its history of cumulative net losses incurred since inception and its lack of any commercially ready products. The Company has concluded that it is more likely than not that it will not realize the benefits of its deferred tax assets. The Company reevaluates the positive and negative evidence at each reporting period.

The Company has never been examined by the Internal Revenue Service or any other jurisdiction for any tax years and, as such, all years within the applicable statutes of limitations are potentially subject to audit.

13. Net Loss Per Share

Basic and diluted net loss per share is computed by dividing net loss attributable to common stockholders by the weighted-average common shares outstanding. The weighted-average common shares outstanding used in the basic and diluted net loss per share calculation includes the pre-funded warrants issued in connection with the Company’s follow-on public offering in June 2023 of 204,081 and registered direct offering in February 2023 of 1,229,224, as the pre-funded warrants are exercisable for nominal cash

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consideration. In September 2023, 1,229,224 of the pre-funded warrants were exercised in a cashless transaction which resulted in 1,229,221 shares of common stock being issued to the investor. As of September 30, 2024, 204,081 pre-funded warrants were outstanding.

The Company has generated a net loss in all periods presented, so the basic and diluted net loss per share are the same, as the inclusion of the potentially dilutive securities would be anti-dilutive. The Company excluded the following from the computation of diluted net loss per share attributable to common stockholders because including them would have had an anti-dilutive effect:

	September 30,
	2024		2023
Restricted stock units		429,522		—
Options to purchase common stock		2,972,432		2,558,531
Employee stock purchase program		2,436		—

14. Commitments and Contingencies

Indemnification Agreements

In the ordinary course of business, the Company may provide indemnification of varying scope and terms to its vendors, lessors, contract research organizations, business partners and other parties with respect to certain matters including, but not limited to, losses arising out of breach of such agreements or from intellectual property infringement claims made by third parties. In addition, the Company has entered into indemnification agreements with members of its Board that will require the Company, among other things, to indemnify them against certain liabilities that may arise by reason of their status or service as directors. The maximum potential amount of future payments the Company could be required to make under these indemnification agreements is, in many cases, unlimited. The Company has not incurred any material costs as a result of such indemnifications and is not currently aware of any indemnification claims.

Legal Proceedings

The Company, from time to time, may be party to litigation arising in the ordinary course of business. The Company was not subject to any material legal proceedings during the nine months ended September 30, 2024 and 2023 and, to the best of its knowledge, no material legal proceedings are currently pending or threatened.

Payments Upon Termination

The Company enters into contracts in the normal course of business with contract research organizations (“CROs”), and contract development and manufacturing organizations (“CDMOs”) and other third parties for preclinical studies, clinical trials and manufacturing services. These contracts typically do not contain minimum purchase commitments and are generally cancelable by the Company upon written notice. Payments due upon cancellation consist of payments for services provided or expenses incurred, including noncancelable obligations of the Company’s service providers, up to the date of cancellation and, in the case of certain arrangements with CROs and CDMOs, may include noncancelable fees. Under such agreements, the exact amounts owed by the Company in the event of termination will be based on the timing of the termination and the exact terms of the agreement. As of September 30, 2024, the Company has not recognized any amounts related to these contingencies as the amount and timing of such payments are not fixed and estimable.

15. Leases

The Company is a tenant under a lease and sublease of office space in Watertown, Massachusetts, both operating leases.

In August 2024, the Company amended its lease of 7,566 square feet of office space which serves as the Company’s corporate headquarters. The lease was amended to extend the term from November 30, 2026 through December 31, 2029. The Company accounted for this amendment as a modification which resulted in the application of a new incremental borrowing rate and the recognition of an additional right-of-use asset and lease liability of $0.1 million, inclusive of a tenant improvement allowance of $0.5 million.

In connection with the August 2024 amendment, the Company entered into a forward-starting lease of 9,281 square feet of office space on the second floor of its corporate headquarters, which the Company is currently subleasing through November 30, 2026. The forward-starting lease is expected to commence on December 1, 2026 immediately following the conclusion of the sublease, and has a term date of December 31, 2029. The Company expects to make undiscounted payments of $1.0 million over the term of the lease, inclusive of a tenant improvement allowance of $0.3 million. The impact of the forward-starting lease is not currently recorded on the Company’s condensed consolidated balance sheets as of the reporting date. The Company will record the impact upon lease commencement.

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In June 2023, the Company entered into a sublease for a term of approximately three and a half years through November 2026, consisting of 9,281 square feet of office space on the second floor of its corporate headquarters. Fixed lease payments include base rent, subject to annual rent increases, and a management fee. Variable lease payments include the Company’s allocated share of costs incurred for real estate taxes, utilities, and other operating expenses applicable to the leased premises. Pursuant to the lease, the Company is also obligated to pay for certain administrative costs, taxes and operating expenses.

16. Related Party Transactions

In June 2024, certain existing investors participated in the Company's underwritten offering (see Note 10).

In June 2023, an existing investor participated in the Company’s follow-on offering (see Note 10).

In March 2023, the Company executed a promissory note for an aggregate principal amount of $0.5 million from an existing investor. The Company did not use these funds and repaid the note four days later, recording a de minimis amount of interest expense based on the then Federal funds rate for short term loans of 4.5% per annum.

In February 2023, certain existing investors participated in the Company’s registered direct offering (see Note 10).

17. Subsequent Events

On November 6, 2024, the Company and certain of its subsidiaries (collectively, the “Borrower”) entered into a Loan and Security Agreement (the “Hercules Loan Agreement”) with the lenders party thereto (the “Lenders”) and Hercules Capital, Inc., as administrative agent and collateral agent (the “Agent”). The Hercules Loan Agreement provides for up to $200.0 million of senior secured term loans (the “Term Loan”) available to Borrower in multiple tranches consisting of: (a) an initial $30.0 million advance funded on the November 6, 2024; (b) up to $30.0 million of additional advances that may be drawn on or prior to September 15, 2026; (c) up to $50.0 million of additional advances that may be drawn on or prior to December 15, 2026; (d) subject to Borrower’s achievement of the Tranche 2 Milestone (as defined in the Hercules Loan Agreement), up to $25.0 million of additional advances that may be drawn on or prior to June 15, 2027; (e) subject to Borrower’s achievement of the Tranche 3 Milestone (as defined in the Hercules Loan Agreement), up to $40.0 million of additional advances that may be drawn on or prior to December 15, 2027; and (f) subject to approval by the Lenders’ investment committees in their discretion, up to $25.0 million of additional advances that may be drawn by Borrower.

The Term Loan will mature on December 1, 2029. The outstanding principal balance of the Term Loan bears cash interest at a floating annual rate equal to the greater of (a) 8.25% and (b) the prime rate plus 1.75%. Borrower may elect to reduce the cash interest rate by up to 2.00% per annum, in which case, subject to the terms and conditions of the Hercules Loan Agreement, the principal balance of the Term Loan also will bear “payment-in-kind” interest (“PIK Interest”) at a rate equal to 1.10 times such interest reduction amount, and with the PIK Interest added to the outstanding principal balance of the Term Loan. The Term Loan is payable in monthly interest-only payments through December 1, 2028, or, if Borrower achieves the Tranche 3 Milestone (as defined in the Hercules Loan Agreement), the interest-only period will be extended through December 1, 2029. At the end of the interest-only period, borrowings under the Hercules Loan Agreement are repayable in monthly payments of principal and accrued interest until the maturity date.

Borrower's obligations under the Hercules Loan Agreement are secured, subject to customary permitted liens and other agreed-upon exceptions, by a first-priority perfected security interest in all of the tangible and intangible assets of the Borrower, other than intellectual property. The Hercules Loan Agreement includes customary repayment and prepayment terms, affirmative and negative covenants and representations and warranties. The Hercules Loan Agreement also includes customary events of default. Additionally, the Hercules Loan Agreement contains a minimum cash covenant that requires Borrower to maintain certain levels of cash in accounts subject to a control agreement in favor of the Agent at all times beginning on the first day on or after January 1, 2027 (or January 1, 2028, if Borrower achieves a certain milestone) on which the aggregate principal amount of the Term Loan advances is then more than $50.0 million; provided, however, the minimum cash covenant will be waived during all times that Borrower’s market capitalization is greater than or equal to $1.0 billion.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion and analysis of our financial condition and results of operations should be read in conjunction with our unaudited condensed consolidated financial statements and related notes appearing at the beginning of this Quarterly Report on Form 10-Q and our audited consolidated financial statements and related notes appearing at the end of our Annual Report on Form 10-K for the year ended December 31, 2023. Some of the information contained in this discussion and analysis or set forth elsewhere in this Quarterly Report on Form 10-Q, including information with respect to our plans and strategy for our business, includes forward-looking statements that involve risks and uncertainties. As a result of many factors, including those factors set forth in the “Risk Factors” section of this Quarterly Report on Form 10-Q, our actual results could differ materially from the results described in, or implied by, the forward-looking statements contained in the following discussion and analysis.

Overview

We are a clinical-stage biopharmaceutical company focused on the discovery, development, and commercialization of novel treatments for patients suffering from serious hematologic diseases. We have assembled a portfolio of clinical and preclinical product candidates that aim to modify fundamental biological pathways associated with the formation and function of red blood cells, specifically heme biosynthesis and iron homeostasis. Our current pipeline includes bitopertin for the treatment of erythropoietic porphyrias, or EPs, including erythropoietic protoporphyria, or EPP, and X-linked protoporphyria, or XLP, and Diamond-Blackfan Anemia, or DBA; DISC-0974 for the treatment of anemia of myelofibrosis, or MF, and anemia of chronic kidney disease, or CKD; and DISC-3405 (formerly MWTX-003) for the treatment of polycythemia vera, or PV, and other hematologic disorders. In addition, our preclinical programs also include DISC-0998, for the treatment of anemia associated with inflammatory diseases. Our approach to product candidate development leverages well-understood molecular mechanisms that have been validated in humans. We believe that each of our product candidates, if approved, has the potential to improve the lives of patients suffering from hematologic diseases.

Bitopertin is the lead product candidate in our heme biosynthesis modulation portfolio. Bitopertin was previously evaluated by F. Hoffmann-La Roche Ltd and Hoffmann-La Roche Inc., or collectively, Roche, in a comprehensive clinical program in over 4,000 individuals in other indications which demonstrated the activity of bitopertin as a glycine transporter 1, or GlyT1, inhibitor and its effect on heme biosynthesis. We are initially developing bitopertin for the treatment of EPs, including EPP and XLP. In April 2024, we presented topline data from AURORA, a Phase 2, randomized, double-blind, placebo-controlled clinical trial of bitopertin in EPP patients conducted at sites in the United States. In June and December 2023, we presented interim data from BEACON, a Phase 2 open-label, parallel-dose clinical trial of bitopertin in EPP and XLP patients conducted at sites in Australia. Additional analyses of the BEACON and AURORA trials were presented in June 2024 and we plan to share further analyses in December 2024. All participants in AURORA and BEACON are eligible to participate in HELIOS, an ongoing open-label, long-term extension study of bitopertin in EPP and XLP. We are also planning APOLLO, a randomized, double-blind, placebo-controlled clinical trial of bitopertin in EPP and XLP patients. As a result of our end-of-Phase 2 meeting with the U.S. Food & Drug Administration, or the FDA, we agreed with the FDA on all proposed attributes of the APOLLO trial, which we plan to initiate by mid-2025. In addition, the FDA agreed with the potential for reduction of protoporphyrin IX, or PPIX, to serve as a surrogate endpoint to support a potential accelerated approval. Under the FDA's Accelerated Approval Program, we would have the potential to submit a New Drug Application, or NDA, for bitopertin in EPP and XLP based on our existing data and, subject to further discussion with the FDA, the APOLLO trial would serve as a confirmatory trial. We will be meeting with the FDA to finalize the details of APOLLO and plan to provide an update in the first quarter of 2025 on this discussion as well as timing for a potential NDA filing under an accelerated pathway. We have also entered into a collaborative research and development agreement with the National Institutes of Health, or NIH, to conduct an NIH-sponsored clinical trial of bitopertin in DBA. The FDA authorized the clinical trial to proceed and the trial began in July 2023. We are planning additional trials of bitopertin in other indications.

DISC-0974 is the lead product candidate in our iron homeostasis portfolio and was in-licensed from AbbVie Deutschland GmbH & Co. KG, or AbbVie. DISC-0974 is designed to suppress hepcidin production and increase serum iron levels. We submitted an Investigational New Drug application, or IND, to the FDA for DISC-0974 in June 2021, received clearance in July 2021, and participants completed a Phase 1 clinical trial in healthy volunteers in the U.S. in June 2022 with results showing an acceptable tolerability profile and evidence of target engagement, iron mobilization and augmented erythropoiesis. We initiated a Phase 1b/2 clinical trial in June 2022 in patients with anemia of MF, and initiated a separate Phase 1b/2 clinical trial in February 2023 in patients with non-dialysis dependent CKD and anemia. We presented interim data from both of these trials in December 2023 as well as additional interim data for anemia of MF in June 2024 and non-dialysis dependent CKD and anemia in October 2024, which additional interim data included safety and changes in hepcidin, iron, and hemoglobin levels for additional patients, as well as longer follow-up. We anticipate presenting additional analyses of the Phase 1b study in anemia of MF in December 2024. In addition, we are developing a preclinical anti-hemojuvelin, or HJV, monoclonal antibody, DISC-0998, which also targets hepcidin suppression and was in-licensed from AbbVie. DISC-0998 is designed to increase serum iron levels and has an extended serum half-life as

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compared to DISC-0974. We believe this profile may be desirable in certain subsets of patients with anemia associated with inflammatory diseases.

Lastly, we are developing DISC-3405, a monoclonal antibody against Transmembrane Serine Protease 6, or TMPRSS6, that we licensed from Mabwell Therapeutics, Inc., or Mabwell. DISC-3405 is part of our iron homeostasis portfolio and is designed to induce hepcidin production and reduce serum iron levels. An IND for DISC-3405 was cleared by the FDA, and a Phase 1 clinical trial in healthy adult volunteers was initiated in October 2023. Interim data was presented from the single-ascending dose ("SAD") portion of the Phase 1 clinical trial of DISC-3405 in healthy volunteers in June 2024. We anticipate presenting data from the multiple-ascending dose ("MAD") portion of the Phase 1 healthy volunteer study of DISC-3405 in December 2024. We expect to develop DISC-3405 for the treatment of PV and other hematologic disorders.

Financial Operations Overview

Revenue

We have not generated any revenue since our inception and do not expect to generate any revenue from the sale of products in the near future, if at all. If our development efforts are successful and result in commercialization of one or more product candidates or if we enter into collaboration or license agreements with third parties, we may generate revenue in the future from product sales, payments from such collaboration or license agreements or a combination thereof.

Operating Expenses

Research and Development Expenses

Research and development expenses consist primarily of costs incurred in connection with the research and development of our product candidates. These expenses include:

•employee-related expenses, including salaries, benefits, and stock-based compensation expense, for personnel engaged in research and development functions;

•expenses incurred in connection with our research and development activities, including under agreements with third parties such as consultants, contractors and contract research organizations, or CROs;

•costs related to contract development and manufacturing organizations, or CDMOs, that are primarily engaged to provide drug substance and product for our preclinical studies, clinical trials and research and development programs, as well as investigative sites and consultants that conduct our clinical trials, preclinical studies and other scientific development services;

•the costs of acquiring and manufacturing preclinical study and clinical trial materials, including manufacturing registration and validation batches;

•costs related to compliance with quality and regulatory requirements; and

•payments made under third-party licensing agreements.

We expense research and development costs as incurred. Costs incurred for external development activities are recognized based on an evaluation of the progress to completion of specific tasks using information provided to us by our vendors. Payments for these activities are based on the terms of the individual agreements, which may differ from the pattern of costs incurred, and may be reflected in our condensed consolidated financial statements as prepaid or accrued expenses. Nonrefundable advance payments for goods or services to be received in the future for use in research and development activities are recorded as prepaid expenses and expensed as the related goods are delivered or the services are performed or when it is no longer expected that the goods will be delivered or the services rendered.

We typically use our employee and infrastructure resources across product candidates and development programs. We track external development costs by product candidate or development program, but we do not allocate personnel costs or other internal costs to specific product candidates or development programs.

We expect that our research and development expenses will increase substantially as we advance our programs into and through clinical development. At this time, we cannot accurately estimate or know the nature, timing and costs of the efforts that will be necessary to complete the preclinical and clinical development of any product candidates we may develop. A change in the outcome of any number of variables with respect to product candidates we may develop could significantly change the costs and timing associated with the development of that product candidate. We may never succeed in obtaining regulatory approval for any

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product candidates we may develop. The successful development of any product candidate is highly uncertain. This is due to the numerous risks and uncertainties associated with product development, including the following:

•the timing and progress of preclinical and clinical development activities;

•the number and scope of preclinical and clinical programs we decide to pursue;

•the ability to raise additional funds necessary to complete clinical development of and commercialize our product candidates;

•our ability to establish new licensing or collaboration arrangements and the progress of the development efforts of third parties with whom we may enter into such arrangements;

•our ability to maintain our current research and development programs and to establish new programs;

•the successful initiation, enrollment and completion of clinical trials with safety, tolerability and efficacy profiles that are satisfactory to the FDA or any comparable foreign regulatory authority;

•the receipt and related terms of regulatory approvals from applicable regulatory authorities for any product candidates;

•the availability of raw materials for use in production of our product candidates;

•establishing agreements with third-party manufacturers for supply of product candidate components for our clinical trials;

•our ability to obtain and maintain patents, trade secret protection and regulatory exclusivity, both in the United States and internationally;

•our ability to protect our other rights in our intellectual property portfolio;

•commercializing product candidates, if and when approved, whether alone or in collaboration with others; and

•obtaining and maintaining third-party insurance coverage and adequate reimbursement for any approved products.

General and Administrative Expenses

General and administrative expenses consist primarily of salaries and related costs for personnel in executive, finance, commercial, corporate and business development, and administrative functions. General and administrative expenses also include legal fees relating to patent and corporate matters, including noncapitalizable transaction costs; professional fees for accounting, auditing, tax compliance and administrative consulting services; investor and public relations expenses; commercial planning; director and officer insurance costs and other insurance costs; and facility related expenses including maintenance and allocated expenses for rent and other operating costs.

We anticipate that our general and administrative expenses will increase substantially in the future as we increase our headcount to support our continued research and development and potential commercialization of our product candidates.

Other Income (Expense), Net

Interest Income

Interest income primarily consists of interest earned on cash equivalents, consisting of money market funds, U.S. treasury securities and certificates of deposit, and marketable securities, consisting of U.S. treasury securities and U.S. government agency securities.

Change in Fair Value of Contingent Value Right ("CVR") Liability

In December 2022, we entered into the Contingent Value Rights Agreement (the “CVR Agreement”), described in more detail in Note 1 to our consolidated financial statements in our Annual Report on Form 10-K for the year ended December 31, 2023 and Note 3 to our unaudited condensed consolidated financial statements, which provided a CVR to pre-merger common stockholders of Gemini Therapeutics, Inc. (“Gemini”) to receive common stock from the Company upon its receipt of certain proceeds, calculated in accordance with the CVR Agreement, resulting from a disposition of Gemini’s pre-merger assets within one year after the closing of the merger. The disposition period ended December 29, 2023 and no dispositions of Gemini’s pre-merger assets were made during the disposition period. Therefore, there were no CVR payments made to the holders and there will not be any future CVR payments to the holders. Prior to December 29, 2023, the CVR liability was measured at fair value as of each reporting date and the change in the fair value for the period, if any, was recorded in the condensed consolidated statements of operations and comprehensive loss in the change in fair value of contingent value right liability. The change in fair value of the CVR liability was $1.5 million for the nine months ended September 30, 2023.

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Results of Operations

Comparison of the Three Months Ended September 30, 2024 and 2023

The following table summarizes our results of operations for the three months ended September 30, 2024 and 2023 (in thousands):

	Three Months Ended September 30,
	2024			2023			Change
Operating expenses:
Research and development	$	24,685		$	14,419		$	10,266
General and administrative		8,171			4,539			3,632
Total operating expenses		32,856			18,958			13,898
Loss from operations		(32,856	)		(18,958	)		(13,898	)
Other income (expense), net:
Interest income		6,362			4,843			1,519
Other income		9			13			(4	)
Total other income (expense), net		6,371			4,856			1,515
Loss before income taxes		(26,485	)		(14,102	)		(12,383	)
Income tax expense		(114	)		(20	)		(94	)
Net loss	$	(26,599	)	$	(14,122	)	$	(12,477	)

Research and Development Expenses

The following table summarizes our research and development expenses for the three months ended September 30, 2024 and 2023 (in thousands):

	Three Months Ended September 30,
	2024		2023		Change
Bitopertin	$	7,261	$	5,018	$	2,243
DISC-3405		3,254		1,806		1,448
DISC-0974		5,671		2,103		3,568
Other research programs and expenses		1,705		1,613		92
Personnel-related (including equity-based compensation)		6,794		3,879		2,915
Total research and development expenses	$	24,685	$	14,419	$	10,266

Research and development expenses were $24.7 million for the three months ended September 30, 2024, compared to $14.4 million for the three months ended September 30, 2023. The increase of $10.3 million in research and development expenses was primarily due to a $3.6 million, $2.2 million, and $1.4 million increase in development expense for DISC-0974, bitopertin, and DISC-3405, respectively, each related to increased clinical study and drug manufacturing activity. Personnel-related costs also increased $2.9 million related to higher research and development headcount, including an increase of $1.2 million in stock-based compensation driven by the Company's annual grant to employees in January 2024.

General and Administrative Expenses

The following table summarizes our general and administrative expenses for the three months ended September 30, 2024 and 2023 (in thousands):

	Three Months Ended September 30,
	2024		2023		Change
Personnel-related (including equity-based compensation)	$	4,970	$	2,195	$	2,775
Legal, consulting and professional fees		2,423		1,478		945
Other expenses		778		866		(88	)
Total general and administrative expenses	$	8,171	$	4,539	$	3,632

General and administrative expenses were $8.2 million for the three months ended September 30, 2024, compared to $4.5 million for the three months ended September 30, 2023. The increase of $3.6 million in general and administrative expenses was primarily due to a $2.8 million increase in personnel-related costs due to higher general and administrative headcount, including an increase of $1.8 million in stock-based compensation driven by the Company's annual grant to employees in January 2024.

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Other Income (Expense), Net

Other income (expense), net was $6.4 million for the three months ended September 30, 2024, compared to other income (expense), net of $4.9 million for the three months ended September 30, 2023. The change of $1.5 million in other income (expense), net was primarily due to an increase in interest income based on larger cash, cash equivalents, and marketable securities balances.

Income Tax Expense

Income tax expense was $0.1 million for the three months ended September 30, 2024, compared to less than $0.1 million for the three months ended September 30, 2023. This expense relates to state income tax resulting from interest income.

Comparison of the Nine Months Ended September 30, 2024 and 2023

The following table summarizes our results of operations for the nine months ended September 30, 2024 and 2023 (in thousands):

	Nine Months Ended September 30,
	2024			2023			Change
Operating expenses:
Research and development	$	71,874		$	46,699		$	25,175
General and administrative		23,296			14,712			8,584
Total operating expenses		95,170			61,411			33,759
Loss from operations		(95,170	)		(61,411	)		(33,759	)
Other income (expense), net:
Interest income		15,454			10,120			5,334
Change in fair value of contingent value right liability		—			(1,500	)		1,500
Other (expense) income		(5	)		8			(13	)
Total other income (expense), net		15,449			8,628			6,821
Loss before income taxes		(79,721	)		(52,783	)		(26,938	)
Income tax expense		(179	)		(67	)		(112	)
Net loss	$	(79,900	)	$	(52,850	)	$	(27,050	)

Research and Development Expenses

The following table summarizes our research and development expenses for the nine months ended September 30, 2024 and 2023 (in thousands):

	Nine Months Ended September 30,
	2024		2023		Change
Bitopertin	$	20,742	$	11,780	$	8,962
DISC-3405		11,823		12,373		(550	)
DISC-0974		12,731		6,730		6,001
Other research programs and expenses		7,062		5,349		1,713
Personnel-related (including equity-based compensation)		19,516		10,467		9,049
Total research and development expenses	$	71,874	$	46,699	$	25,175

Research and development expenses were $71.9 million for the nine months ended September 30, 2024, compared to $46.7 million for the nine months ended September 30, 2023. The increase of $25.2 million in research and development expenses was primarily due to a $9.0 million increase in personnel-related costs related to higher research and development headcount, including an increase of $3.7 million in stock-based compensation driven by the Company's annual grant to employees in January 2024 and a $9.0 million and $6.0 million increase in development expense related to increased clinical study and drug manufacturing activity for bitopertin and DISC-0974, respectively; partially offset by a $0.6 million decrease related to the DISC-3405 program which incurred $10.0 million in an upfront license fee in the nine months ended September 30, 2023, offset by the increase in development expense in the nine months ended September 30, 2024 related to increased clinical study and drug manufacturing activity.

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General and Administrative Expenses

The following table summarizes our general and administrative expenses for the nine months ended September 30, 2024 and 2023 (in thousands):

	Nine Months Ended September 30,
	2024		2023		Change
Personnel-related (including equity-based compensation)	$	14,506	$	6,772	$	7,734
Legal, consulting and professional fees		6,177		5,197		980
Other expenses		2,613		2,743		(130	)
Total general and administrative expenses	$	23,296	$	14,712	$	8,584

General and administrative expenses were $23.3 million for the nine months ended September 30, 2024, compared to $14.7 million for the nine months ended September 30, 2023. The increase of $8.6 million in general and administrative expenses was primarily due to an increase of $7.7 million in personnel-related costs due to higher general and administrative headcount, including an increase of $5.1 million in stock-based compensation driven by the Company's annual grant to employees in January 2024.

Other Income (Expense), Net

Other income (expense), net was $15.4 million for the nine months ended September 30, 2024, compared to other income (expense), net of $8.6 million for the nine months ended September 30, 2023. The change of $6.8 million in other income (expense), net was primarily due to an increase in interest income based on larger cash, cash equivalents, and marketable securities balances and a decrease in expense of $1.5 million due to the disposition period of the CVR liability ending in December 2023.

Income Tax Expense

Income tax expense was $0.2 million for the nine months ended September 30, 2024, compared to $0.1 million for the nine months ended September 30, 2023. This expense relates to state income tax resulting from interest income.

Liquidity and Capital Resources

Sources of Liquidity

Since our inception, we have not generated any revenue from product sales and have incurred significant operating losses. We expect to continue to incur significant expenses and operating losses in the foreseeable future as we advance the clinical development of our product candidates. We expect that our research and development and general and administrative costs will continue to increase significantly, including in connection with conducting clinical trials and manufacturing for our product candidates to support commercialization and providing general and administrative support for our operations, including the costs associated with operating as a public company. As a result, we will need additional capital to fund our operations, which we may obtain from additional equity or debt financings, collaborations, licensing arrangements or other sources. See “Risk Factors” for additional risks associated with our substantial capital requirements.

To date, we have funded our operations primarily with proceeds from the sale of our convertible preferred stock and common stock, the proceeds from the merger with Gemini, proceeds from at-the-market offerings, proceeds from a registered direct offering, proceeds from a follow-on public offering, proceeds from an underwritten offering, and proceeds from borrowing under the Hercules Loan Agreement described below. Through September 30, 2024, we have received net proceeds of $144.5 million from sales of our Series Seed, Series A and Series B convertible preferred stock, $89.5 million from the merger with Gemini, $53.5 million from sales of common stock in a pre-closing private financing, $62.4 million from sales of common stock and pre-funded warrants in a registered direct offering, $147.9 million from sales of common stock and pre-funded warrants in a public follow-on offering, $172.5 million from sales of common stock in an underwritten offering and $41.3 million from at-the-market offerings. As of September 30, 2024, we had cash, cash equivalents, and marketable securities of $487.4 million.

In addition, in November 2024, we and certain of our subsidiaries, collectively referred to as the Borrower, entered into a Loan and Security Agreement, or the Hercules Loan Agreement, with the lenders party thereto and Hercules Capital, Inc., as administrative agent and collateral agent, providing for up to $200.0 million of senior secured term loans available to Borrower in multiple tranches, including an initial $30.0 million advance funded on November 6, 2024. The Hercules Loan Agreement is described in more detail in Note 17 to our unaudited condensed consolidated financial statements contained in Part I, Item I of this Quarterly Report on Form 10-Q.

We have incurred significant operating losses since inception and, as of September 30, 2024, had an accumulated deficit of $268.5 million. In addition, we expect to continue to incur significant and increasing expenses and operating losses for the foreseeable future. We believe that our current cash resources, including our borrowing of $30.0 million under the Hercules Loan Agreement as of November 6, 2024, will enable us to fund our current planned operating expense and capital expenditure

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requirements well into 2027. We may also pursue additional cash resources through public or private equity offerings, collaborations or additional debt financings.

Cash Flows

The following table provides information regarding our cash flows for each period presented (in thousands):

	Nine Months Ended September 30,
	2024			2023
Net cash (used in) provided by:
Operating activities	$	(66,353	)	$	(55,666	)
Investing activities		(290,906	)		(86	)
Financing activities		189,517			231,621
Net (decrease) increase in cash, cash equivalents and restricted cash	$	(167,742	)	$	175,869

Operating Activities

Our cash flows from operating activities are greatly influenced by our use of cash for operating expenses and working capital requirements to support our business. We have historically experienced negative cash flows from operating activities as we invested in developing our portfolio, drug discovery efforts, conducting clinical trials and manufacturing, and related infrastructure. The cash used in operating activities resulted primarily from our net losses adjusted for non-cash charges and changes in components of operating assets and liabilities, which are primarily the result of increased expenses and timing of vendor payments.

During the nine months ended September 30, 2024, net cash used in operating activities of $66.4 million was primarily due to our net loss of $79.9 million, which includes interest income of $15.5 million; partially offset by non-cash expenses of $9.8 million primarily related to stock-based compensation expense of $12.5 million offset by amortization/accretion of investment securities of $3.1 million and changes in operating assets and liabilities of $3.7 million, including a reduction in accounts payable for the payment of a milestone payment of $5.0 million to Mabwell.

During the nine months ended September 30, 2023, net cash used in operating activities of $55.7 million was primarily due to our net loss of $52.9 million and a decrease in operating liabilities of $8.5 million primarily related to the payment of merger-related costs which were included in accounts payable at December 31, 2022, partially offset by non-cash expenses of $5.4 million primarily related to stock-based compensation expense of $3.6 million and the change in fair value of the contingent value right liability of $1.5 million.

Investing Activities

During the nine months ended September 30, 2024, net cash used in investing activities was primarily due to purchases of marketable securities of $313.9 million, partially offset by maturities of marketable securities of $23.0 million.

During the nine months ended September 30, 2023, net cash used in investing activities was due to purchases of property and equipment.

Financing Activities

During the nine months ended September 30, 2024, net cash provided by financing activities of $189.5 million consisted primarily of cash net proceeds of $172.5 million from the underwritten offering and aggregate net proceeds of $14.8 million from at-the-market offerings.

During the nine months ended September 30, 2023, net cash provided by financing activities of $231.6 million consisted primarily of aggregate net proceeds of $147.9 million from sales of common stock and pre-funded warrants in a public follow-on offering, aggregate net proceeds of $62.4 million from sales of common stock and pre-funded warrants in a registered direct offering and aggregate net proceeds of $19.5 million from at-the-market offerings.

Future Funding Requirements

We expect our expenses to increase substantially in connection with our ongoing activities, particularly as we advance our product candidates into and through clinical development and operate as a public company. Our funding requirements and the timing and amount of our operating expenditures will depend largely on:

•the initiation, progress, timing, costs and results of preclinical studies and clinical trials for our product candidates or any future product candidates we may develop;

•the costs, timing and outcome of regulatory review of our product candidates;

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•changes in laws or regulations applicable to any product candidates we may develop, including but not limited to clinical trial requirements for approvals;

•the cost and timing of obtaining materials to produce adequate product supply for any preclinical or clinical development of any product candidate we may develop;

•the effect of competing technological and market developments;

•our ability to establish and maintain strategic collaborations, licensing or other arrangements and the financial terms of such arrangements;

•the payment or receipt of milestones, royalties and other collaboration-based revenues, if any;

•the costs and timing of future commercialization activities, including product manufacturing, marketing, sales and distribution, for any product candidate we may develop for which we obtain marketing approval;

•the amount and timing of revenue, if any, received from commercial sales of our product candidates for which we receive marketing approval; and

•the legal costs involved in prosecuting patent applications and enforcing patent claims and other intellectual property claims.

Identifying potential product candidates and conducting preclinical studies and clinical trials is a time consuming, expensive and uncertain process that takes years to complete, and we may never generate the necessary data or results required to obtain marketing approval and achieve product sales. In addition, our product candidates, if approved, may not achieve commercial success. Our commercial revenues, if any, will be derived from sales of products that we do not expect to be commercially available for many years, if ever. Accordingly, we will need to obtain substantial additional funds to achieve our business objectives.

Until such time, if ever, as we can generate substantial revenue from product sales, we expect to finance our cash needs through a combination of equity offerings, debt financings, collaborations, strategic alliances, and marketing, distribution or licensing arrangements with third parties. However, we may be unable to raise additional funds or enter into such other arrangements when needed on favorable terms or at all. To the extent that we raise additional capital through the sale of equity or convertible debt securities, the ownership interest of our existing stockholders may be materially diluted, and the terms of such securities could include liquidation or other preferences that adversely affect the rights of our common stockholders. Debt financing and preferred equity financing, if available, may involve agreements that include restrictive covenants that limit our ability to take specified actions, such as incurring additional debt, making capital expenditures or declaring dividends. If we raise funds through collaborations, strategic alliances or marketing, distribution or licensing arrangements with third parties, we may have to relinquish valuable rights to our technologies, future revenue streams, research programs or product candidates or grant licenses on terms that may not be favorable to us. If we are unable to raise additional funds through equity or debt financings or other arrangements when needed, we may be required to delay, reduce or eliminate our product development or future commercialization efforts, or grant rights to develop and market product candidates that we would otherwise prefer to develop and market ourselves.

Contractual Obligations and Other Commitments

The following table summarizes our contractual obligations as of September 30, 2024 and the effects that such obligations are expected to have on our liquidity and cash flows in future periods (in thousands):

	Payments Due by Period
	Total		Less Than 1 Year		1 to 3 Years		3 to 5 Years		More Than 5 Years
Operating lease commitments(1)(2)	$	4,148	$	782	$	1,395	$	1,745	$	226
Total	$	4,148	$	782	$	1,395	$	1,745	$	226

(1) Amounts reflect contractual rent payments due for our leased and subleased office spaces in Watertown, Massachusetts as of September 30, 2024 and include contractual payments due under our forward-starting lease which is expected to commence in December 2026. The term date for our existing lease is December 31, 2029 and the term date for our existing sublease is November 30, 2026.

(2) Table excludes the impact of tenant improvement allowance reimbursements of $0.8 million which are expected to be received in less than one year. Of this total, $0.5 million relates to our existing leased office space and $0.3 million relates to our forward-starting lease.

We enter into contracts in the normal course of business with CROs, CDMOs and other third parties for preclinical studies, clinical trials and manufacturing services. These contracts typically do not contain minimum purchase commitments and are generally cancelable by us upon written notice. Payments due upon cancellation consist of payments for services provided or expenses incurred, including noncancelable obligations of our service providers, up to the date of cancellation and, in the case of certain arrangements with CROs and CDMOs, may include non-cancelable fees. These payments are not included in the table above as the amount and timing of such payments are not fixed and estimable.

We have also entered into license agreements under which we are obligated to make specified milestone and royalty payments. We have not included future payments under these agreements in the table of contractual obligations above since the payment

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obligations under these agreements are contingent upon future events such as regulatory milestones or generating product sales. We are unable to estimate the timing or likelihood of achieving these milestones or generating future product sales. For additional information about our license agreements and amounts that could become payable in the future under such agreements, see our condensed consolidated financial statements.

Critical Accounting Policies and Estimates

Our management’s discussion and analysis of our financial condition and results of operations is based on our condensed consolidated financial statements, which have been prepared in accordance with U.S. generally accepted accounting principles, or GAAP. The preparation of our condensed consolidated financial statements and related disclosures requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, costs and expenses, and the disclosure of contingent assets and liabilities in our condensed consolidated financial statements. We base our estimates on historical experience, known trends and events and various other factors that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. We evaluate our estimates and assumptions on an ongoing basis. Our actual results may differ from these estimates under different assumptions or conditions. See our Annual Report on Form 10-K for the year ended December 31, 2023 for more information about critical accounting policies as well as a description of our other significant accounting policies.

There have been no material changes to our critical accounting estimates from those described in Part II, Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations” included in our Annual Report on Form 10-K for the year ended December 31, 2023.

Recently Issued and Adopted Accounting Pronouncements

A description of recently issued and certain recently adopted accounting pronouncements that have or may potentially impact our financial position and results of operations is included in Note 2 to our consolidated financial statements in our Annual Report on Form 10-K for the year ended December 31, 2023.

Emerging Growth Company and Smaller Reporting Company Status

We are an “emerging growth company,” as defined in the Jumpstart Our Business Startups Act of 2012, or the JOBS Act, and we may take advantage of certain exemptions from various reporting requirements that are applicable to other public companies that are not emerging growth companies. We may take advantage of these exemptions until we are no longer an emerging growth company under Section 107 of the JOBS Act, which provides that an emerging growth company can take advantage of the extended transition period afforded by the JOBS Act for the implementation of new or revised accounting standards. We have elected to avail ourselves of the extended transition period and, therefore, while we are an emerging growth company, we will not be subject to new or revised accounting standards at the same time that they become applicable to other public companies that are not emerging growth companies, unless we choose to early adopt a new or revised accounting standard. We will remain an emerging growth company until the earlier of (1) the last day of the fiscal year (a) following the fifth anniversary of the closing of our initial public offering which occurred in August 2020, (b) in which we have total annual gross revenue of at least $1.235 billion, or (c) in which we are deemed to be a large accelerated filer, which means the market value of our common stock that is held by non-affiliates exceeds $700 million as of the prior June 30th, and (2) the date on which we have issued more than $1.0 billion in non-convertible debt during the prior three-year period.

Additionally, we are a “smaller reporting company” as defined in Item 10(f)(1) of Regulation S-K. Smaller reporting companies may take advantage of certain reduced disclosure obligations, including, among other things, providing only two years of audited financial statements.

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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISKS

As of September 30, 2024, we had cash, cash equivalents, and marketable securities of $487.4 million, which consisted of cash, money market funds, U.S. treasury securities and U.S. government agency securities, which are classified as available-for-sale securities. As of December 31, 2023, we had cash and cash equivalents of $360.4 million, which consisted of cash, money market funds and U.S. treasury securities. Our primary investment objectives are the preservation of capital and the maintenance of liquidity, and our investment policy defines allowable investments based on quality of the institutions and financial instruments designed to minimize risk exposure. Our exposure to interest rate sensitivity is affected by changes in the general level of U.S. interest rates. Our marketable securities are subject to interest rate risk and will fall in value if market interest rates increase. Due to the short-term maturities and low risk profiles of our investments, we do not anticipate a significant exposure to interest rate risk. If market interest rates were to increase immediately and uniformly by one percentage point from levels as of September 30, 2024, the net fair value of our marketable securities would decrease by approximately $1.4 million.

Our employees and operations are primarily located in the United States. We have, from time to time, engaged in contracts with contractors or other vendors in a currency other than the U.S. dollar. To date, we have had minimal exposure to fluctuations in foreign currency exchange rates as the time period between the date that transactions are initiated, and the date of payment or receipt of payment is generally of short duration. Accordingly, we believe we do not have a material exposure to foreign currency risk.

Inflation generally affects us by increasing our cost of labor and contract research. We do not believe that inflation had a material effect on our business, financial condition or results of operations during the nine months ended September 30, 2024 and 2023.

ITEM 4. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

Our management, under the supervision and with the participation of our Principal Executive Officer (our Chief Executive Officer) and Principal Financial Officer (our Chief Financial Officer), has evaluated the effectiveness of our disclosure controls and procedures as of September 30, 2024. The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, means controls and other procedures of a company that are designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the company’s management, including its principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure.

Management recognizes that any disclosure controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives, and management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Based on the evaluation of our disclosure controls and procedures as of September 30, 2024, our Principal Executive Officer and Principal Financial Officer concluded that, as of such date, our disclosure controls and procedures were effective at the reasonable assurance level.

Changes in Internal Control Over Financial Reporting

No change in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) occurred during the nine months ended September 30, 2024 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

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PART II—OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

From time to time, we may be subject to legal proceedings and claims in the ordinary course of business. We are not currently aware of any such proceedings or claims that we believe will have, individually or in the aggregate, a material adverse effect on our business, financial condition or results of operations.

ITEM 1A. RISK FACTORS

Set forth below are the risks that we believe are material to our investors and they should be carefully considered. If any of the following risks and uncertainties actually occurs, our business, prospects, financial condition and results of operations could be materially and adversely affected. The risks described below are not intended to be exhaustive and other factors not presently known to us or that we currently believe are immaterial may affect our business, prospects, financial condition and results of operations if they occur. This section contains forward-looking statements. You should refer to the explanation of the qualifications and limitations on forward-looking statements beginning on page 1 of this Quarterly Report on Form 10-Q.

Risks Related to Our Limited Operating History, Financial Position and Capital Requirements

Our limited operating history may make it difficult for you to evaluate the success of our business to date and to assess our future viability.

We commenced operations in 2017 and are a clinical-stage biopharmaceutical company with a limited operating history. Biopharmaceutical product development is a highly speculative undertaking and involves a substantial degree of risk. Since our inception in October 2017, we have devoted substantially all of our efforts to organizing and staffing our company, business planning, capital raising, establishing and maintaining our intellectual property portfolio, building our pipeline of product candidates, conducting drug discovery activities, undertaking preclinical studies, conducting early-stage clinical trials, and providing general and administrative support for these operations. We have not yet demonstrated our ability to successfully develop any product candidate, obtain regulatory approvals, manufacture a commercial scale product or arrange for a third party to do so on our behalf, or conduct sales and marketing activities necessary for successful product commercialization. Consequently, any predictions you make about our future success or viability may not be as accurate as they could be if we had a longer operating history or a history of successfully developing and commercializing products.

In addition, as our business grows, we may encounter unforeseen expenses, difficulties, complications, delays and other known and unknown factors. We will need to transition at some point from a company with a research and development focus to a company capable of supporting commercial activities. We may not be successful in such a transition.

We have incurred significant net losses since our inception and anticipate that we will continue to incur losses for the foreseeable future.

Our net losses were $79.9 million and $52.9 million for the nine months ended September 30, 2024 and 2023, respectively. We had an accumulated deficit of $268.5 million as of September 30, 2024. Substantially all of our net losses have resulted from costs incurred in connection with our research and development programs and from general and administrative costs associated with our operations. We expect our research and development expenses to increase significantly in connection with the commencement and continuation of clinical trials of our product candidates. In addition, if we obtain regulatory approval for our product candidates, we will incur significant sales, marketing and manufacturing expenses. We also will continue to incur additional costs associated with operating as a public company and expect to continue to incur significant and increasing operating losses over the next several years and for the foreseeable future. Because of the numerous risks and uncertainties associated with developing pharmaceutical products, we are unable to predict the extent of any future losses or when we will become profitable, if at all. Even if we do become profitable, we may not be able to sustain or increase our profitability on a quarterly or annual basis.

The amount of our future losses is uncertain and our quarterly and annual operating results may fluctuate significantly in the future due to a variety of factors, many of which are outside of our control and may be difficult to predict, including the following:

•the timing and success or failure of preclinical studies and clinical trials for our product candidates or competing product candidates, or any other change in the competitive landscape of our industry, including consolidation among our competitors or partners;

•our ability to successfully open clinical trial sites and recruit and retain subjects for clinical trials and any delays caused by difficulties in such efforts;

•our ability to obtain regulatory approval for our product candidates, and the timing and scope of any such approvals we may receive;

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•the timing and cost of, and level of investment in, research and development activities relating to our product candidates, which may change from time to time;

•the cost of manufacturing our product candidates and products, should they receive regulatory approval, which may vary depending on the quantity of production and the terms of our agreements with manufacturers;

•our ability to attract, hire and retain qualified personnel;

•expenditures that we will or may incur to develop additional product candidates;

•the level of demand for our products should they receive regulatory approval, which may vary significantly;

•the risk/benefit profile, cost and reimbursement policies with respect to our product candidates, if approved, and existing and potential future therapeutics that compete with our product candidates;

•the changing and volatile U.S. and global economic environments, including as a result of public health crises; and

•future accounting pronouncements or changes in our accounting policies.

The cumulative effects of these factors could result in large fluctuations and unpredictability in our quarterly and annual operating results. As a result, comparing our operating results on a period-to-period basis may not be meaningful. This variability and unpredictability could also result in us failing to meet the expectations of industry or financial analysts or investors for any period. If our revenue or operating results fall below the expectations of analysts or investors or below any forecasts we may provide to the market, or if the forecasts we provide to the market are below the expectations of analysts or investors, the price of our common stock could decline substantially. Such a stock price decline could occur even if we have met any previously publicly stated guidance we may provide.

We have no products approved for commercial sale and have not generated any revenue from product sales.

Our ability to become profitable depends upon our ability to generate revenue. To date, we have not generated collaborative revenue from our product candidates and have not generated revenue from product sales, and do not expect to generate any revenue from the sale of products in the near future. We do not expect to generate significant revenue unless and until we obtain regulatory approval of, and begin to sell, one or more of our product candidates. Our ability to generate revenue depends on a number of factors, including, but not limited to, our ability to:

•successfully complete our ongoing and planned preclinical studies for our current and future product candidates;

•timely file and receive acceptance of our Investigational New Drug applications, or INDs, in order to commence our planned clinical trials or future clinical trials;

•successfully enroll subjects in and complete, our ongoing and planned clinical trials;

•initiate and successfully complete all safety and efficacy studies necessary to obtain U.S. and foreign regulatory approval for our product candidates;

•successfully address the prevalence, duration and severity of potential side effects or other safety issues experienced with our product candidates, if any;

•timely file New Drug Applications, or NDAs, and Biologic License Applications, or BLAs, and receive regulatory approvals for our product candidates from the U.S. Food and Drug Administration, or the FDA, and comparable foreign regulatory authorities;

•establish and maintain clinical and commercial manufacturing capabilities or make arrangements with third-party manufacturers for clinical supply and commercial manufacturing;

•obtain and maintain patent and trade secret protection or regulatory exclusivity for our product candidates;

•launch commercial sales of our products, if and when approved, whether alone or in collaboration with others;

•obtain and maintain acceptance of our products, if and when approved, by patients, the medical community and third-party payors;

•position our product candidates to effectively compete with other therapies;

•obtain and maintain healthcare coverage and adequate reimbursement;

•enforce and defend intellectual property rights and claims; and

•maintain a continued acceptable safety profile of our products following approval.

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If we do not achieve one or more of these factors in a timely manner or at all, we could experience significant delays or an inability to successfully commercialize our product candidates, which would materially harm our business. If we do not receive regulatory approvals for our product candidates, we may not be able to continue our operations.

Our existing and any future indebtedness could adversely affect our ability to operate our business.

In November 2024, we entered into a Loan and Security Agreement, or the Hercules Loan Agreement, with the lenders party thereto, or the Lenders, and Hercules Capital, Inc., as administrative agent and collateral agent, or the Agent. The Hercules Loan Agreement provides for up to $200.0 million of senior secured term loans, or the Term Loan, available to us in multiple tranches. The Term Loan will mature on December 1, 2029. Our obligations under the Hercules Loan Agreement are secured, subject to customary permitted liens and other agreed-upon exceptions, by a first-priority perfected security interest in all of our tangible and intangible assets, other than intellectual property.

The Hercules Loan Agreement contains customary affirmative and negative covenants that could prevent us from taking certain actions without the consent of the Lenders. These covenants may limit our flexibility in operating our business and our ability to take actions that might be advantageous to us and our stockholders. Affirmative covenants include, among others, a financial covenant requiring us to maintain a minimum amount of qualified cash. Negative covenants include, among others: restrictions on transferring any part of our business or intellectual property; incurring additional indebtedness; engaging in mergers or acquisitions; paying dividends or making other distributions; making investments; and creating other liens on our assets, in each case subject to customary exceptions.

The Hercules Loan Agreement also contains customary events of default, including the occurrence of a Material Adverse Effect (as defined in the Hercules Loan Agreement), and failure to make payments when due or comply with other covenants therein. We intend to satisfy our current and future debt service obligations with our then-existing cash and cash equivalents. However, we may not have sufficient funds, and may be unable to arrange for additional financing, to pay the amounts due under Hercules Loan Agreement or any other debt instruments. Upon the occurrence and continuance of an event of default, the Lenders may accelerate all of our repayment obligations and take control of our pledged assets, potentially requiring us to renegotiate our agreement on terms less favorable to us or to immediately cease operations. Any declaration by the Lenders of an event of default would therefore significantly harm our business and prospects and could cause the price of our common stock to decline.

If we raise any additional debt financing, the terms of such additional debt could further restrict our operating and financial flexibility.

We will need to raise substantial additional funding. If we are unable to raise capital when needed or on terms acceptable to us, we may be forced to delay, reduce or eliminate some of our product development programs or commercialization efforts.

The development of pharmaceutical products is capital-intensive. We are currently advancing our hematologic disease programs through preclinical and clinical development. We expect our expenses to significantly increase in connection with our ongoing activities, particularly as we continue the research and development of, initiate and complete clinical trials of, and seek regulatory approval for, our product candidates. In addition, depending on the status of regulatory approval or, if we obtain regulatory approval for any of our product candidates, we expect to incur significant commercialization expenses related to product sales, marketing, manufacturing and distribution. We may also need to raise additional funds sooner if we choose to pursue additional indications and/or geographies for our current or future product candidates or otherwise expand more rapidly than presently anticipated. Furthermore, we expect to continue to incur costs associated with operating as a public company. Accordingly, we will need to obtain substantial additional funding in connection with our continuing operations. If we are unable to raise capital when needed or on attractive terms, we may be forced to delay, reduce or eliminate certain of our research and development programs or future commercialization efforts.

We believe that we have cash, cash equivalents, and marketable securities that will enable us to fund operating expenses and capital expenditure requirements well into 2027. However, we have based this estimate on assumptions that may prove to be wrong, and we could exhaust our available capital resources sooner than expected. Our future capital requirements will depend on and could increase significantly as a result of many factors, including:

•the timing and progress of preclinical and clinical development activities;

•the number and scope of preclinical and clinical programs we decide to pursue;

•our ability to raise additional funds necessary to complete clinical development of and commercialize our product candidates;

•our ability to establish new and maintain existing licensing or collaboration arrangements and the progress of the development efforts of third parties with whom we may enter into such arrangements;

•our ability to maintain our current research and development programs and to establish new programs;

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•the successful initiation, enrollment and completion of clinical trials with safety, tolerability and efficacy profiles that are satisfactory to the FDA or any comparable foreign regulatory authority;

•the receipt and related terms of regulatory approvals from applicable regulatory authorities for any product candidates;

•the availability of raw materials for use in production of our product candidates;

•establishing agreements with third-party manufacturers for supply of product candidate components for our clinical trials;

•our ability to obtain and maintain patents, trade secret protection and regulatory exclusivity, both in the United States and internationally;

•our ability to protect our other rights in our intellectual property portfolio;

•commercializing product candidates, if and when approved, whether alone or in collaboration with others;

•obtaining and maintaining third-party insurance coverage and adequate reimbursement for any approved products; and

•the potential additional expenses attributable to adjusting our development plans (including any supply related matters) to any public health crises.

Identifying potential product candidates and conducting preclinical development testing and clinical trials is a time-consuming, expensive and uncertain process that takes years to complete, and we may never generate the necessary data or results required to obtain regulatory approval and achieve product sales. In addition, our product candidates, if approved, may not achieve commercial success. Our commercial revenue, if any, will be derived from sales of products that we do not expect to be commercially available for several years, if at all. Accordingly, we will need to continue to rely on additional financing to achieve our business objectives.

Any additional fundraising efforts may divert our management from their day-to-day activities, which may adversely affect our ability to develop and commercialize our product candidates. Disruptions in the financial markets in general may make equity and debt financing more difficult to obtain and may have a material adverse effect on our ability to meet our fundraising needs. We cannot guarantee that future financing will be available in sufficient amounts or on terms acceptable to us, if at all.

If we are unable to obtain funding on a timely basis or on acceptable terms, we may be required to significantly curtail, delay or discontinue one or more of our research or development programs or the commercialization of any product that has received regulatory approval or be unable to expand our operations or otherwise capitalize on our business opportunities as desired, which could materially affect our business, financial condition and results of operations.

Raising additional capital may cause dilution to our stockholders, restrict our operations or require us to relinquish rights to our technologies or product candidates.

Until such time, if ever, we can generate substantial product revenue, we expect to finance our cash needs through a combination of private and public equity offerings, debt financings, collaborations, strategic alliances and licensing arrangements. We do not have any committed external source of funds. The terms of any financing may adversely affect the holdings or the rights of our stockholders and the issuance of additional securities, whether equity or debt, by us, or the possibility of such issuance, may cause the market price of our shares to decline. To the extent that we raise additional capital through the sale of common stock or securities convertible or exchangeable into common stock, your ownership interest will be diluted, and the terms of those securities may include liquidation or other preferences that may materially adversely affect your rights as a common stockholder. Additional debt financing, if available, would increase our fixed payment obligations and may involve agreements that include covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, acquiring, selling or licensing intellectual property rights, and making capital expenditures, declaring dividends or other operating restrictions that could adversely impact our ability to conduct our business. We could also be required to meet certain milestones in connection with debt financing and the failure to achieve such milestones by certain dates may force us to relinquish rights to some of our technologies or product candidates or otherwise agree to terms unfavorable to us which could have a material adverse effect on our business, operating results and prospects.

We also could be required to seek funds through arrangements with collaborators or otherwise at an earlier stage than otherwise would be desirable. If we raise funds through collaborations, strategic alliances or licensing arrangements with third parties, we may have to relinquish valuable rights to our intellectual property, future revenue streams, research programs or product candidates, grant licenses on terms that may not be favorable to us or grant rights to develop and market product candidates that we would otherwise prefer to develop and market ourself, any of which may have a material adverse effect on our business, operating results and prospects.

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Risks Related to the Discovery and Development of Our Product Candidates

We have not yet progressed any product candidates into a Phase 3 clinical trial and may be unable to successfully complete any additional clinical trials for any product candidates we develop. Certain of our programs are still in preclinical development and may never advance to clinical development.

We currently only have three product candidates in clinical development, none of which has yet progressed into a Phase 3 clinical trial. As such, we have not yet demonstrated our ability to successfully complete large-scale, pivotal clinical trials, obtain regulatory approvals, manufacture a commercial scale product or arrange for a third party to do so on our behalf or conduct sales and marketing activities necessary for successful commercialization. Our programs are still in preclinical and early to mid-stage clinical development. Our clinical programs may not advance to the next stage of clinical development, and our preclinical programs may never advance to clinical development or through clinical development, as applicable. We may not initiate any clinical trial of our product candidates until we have submitted an IND to the FDA or comparable submissions with equivalent regulatory authorities and received regulatory clearance. We may not be able to submit INDs or other regulatory filings for bitopertin or any of our other product candidates on the timelines we expect, if at all. For example, we may experience manufacturing delays or other delays with IND-enabling studies. Moreover, we cannot be sure that submission of regulatory filings with the FDA or other regulatory authorities will result in such regulatory authorities allowing clinical trials to begin on a timely basis or at all, or that, once begun, such trials will be completed on schedule, if at all, or that issues will not arise that require us to revise, postpone, suspend or terminate our clinical trials. For example, we filed an IND in April 2022 with the FDA to initiate the AURORA Phase 2 trial of bitopertin in EPP patients, but the FDA initially placed the initiation of this trial on clinical hold; we received clearance to initiate the study in July 2022 after the study design was finalized with the FDA, and we initiated the study in October 2022. Commencing any of our clinical trials is subject to finalizing the trial design based on discussions with the FDA and other regulatory authorities. Any guidance we receive from the FDA or other regulatory authorities is subject to change. These regulatory authorities could change their position, including on the acceptability of our trial designs or the clinical endpoints selected, which may require us to complete additional clinical trials or result in the composition of stricter approval conditions than currently expected. For a further example, we relied on the data package generated by F. Hoffmann-La Roche Ltd. and Hoffmann-La Roche Inc., or collectively, Roche, to support our IND submission for bitopertin to initiate our AURORA Phase 2 clinical trial in patients with EPP, as well as our submission of an application with the Australian Therapeutic Goods Administration, or TGA, for our BEACON Phase 2 clinical trial in patients with EPP or XLP, and it is possible that the FDA or TGA, as applicable, may require us to conduct additional preclinical studies to support a future marketing application of bitopertin. Successful completion of our clinical trials is a prerequisite to submitting an NDA or a BLA to the FDA, a Marketing Authorisation Application, or MAA, to the European Medicines Agency, or EMA, or other marketing applications to regulatory authorities in other jurisdictions, for each product candidate and, consequently, the regulatory approval of each product candidate.

A single well-controlled clinical trial may not be sufficient for approval. In general, the FDA requires two well-controlled clinical trials to support registration of a new drug or biologic. Exceptions may be made in cases of a severe disease with few treatment options, and in principle this exception may appear applicable to many of the diseases that we seek to treat, such as EPP, XLP, anemia of MF, DBA and others. Nonetheless, the FDA and other regulators may always require additional clinical trials to support regulatory approval.

If we are required to conduct additional preclinical studies or clinical trials or other testing of our product candidates beyond those that are currently contemplated, if we are unable to successfully complete clinical trials of our product candidates or other testing, if the results of these trials or tests are not positive or are only modestly positive or if there are safety concerns, we may:

•be delayed in obtaining regulatory approval for our product candidates;

•not obtain regulatory approval at all;

•obtain regulatory approval for indications or patient populations that are not as broad as intended or desired;

•continue to be subject to post-marketing testing requirements; or

•experience having the product removed from the market after obtaining regulatory approval.

Our programs are focused on the development of therapeutics for patients with hematologic diseases, which is a rapidly evolving area of science, and the approach we are taking to discover and develop product candidates is novel and may never lead to approved or marketable products.

The discovery and development of therapeutics for patients with hematologic diseases is an emerging field, and the scientific discoveries that form the basis for our efforts to discover and develop product candidates are relatively new. The scientific evidence to support the feasibility of developing product candidates based on these discoveries is both preliminary and limited. Although we believe, based on our preclinical work that our programs have the potential to provide disease-modifying therapies, clinical results in patients may not confirm this hypothesis or may only confirm it for certain alterations or certain indications. The patient populations for our product candidates are limited to those with specific hematologic diseases. We cannot be certain that the patient

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populations for each specific disease will be large enough to allow us to successfully obtain approval and commercialize our product candidates and achieve profitability.

Clinical product development involves a lengthy and expensive process, with an uncertain outcome.

Our preclinical studies and future and ongoing clinical trials may not be successful. Currently, all of our programs are in preclinical and early clinical development. It is impossible to predict when or if any of our product candidates will prove effective and safe in humans or will receive regulatory approval. Before obtaining regulatory approval from regulatory authorities for the sale of any product candidate, we must complete preclinical studies and then conduct extensive clinical trials to demonstrate the safety and efficacy of our product candidates or the safety, purity and potency of our biological product candidates in humans. There is no guarantee that our product candidates will advance in accordance with the timelines we anticipate, if at all. Clinical testing is expensive, difficult to design and implement, can take many years to complete and outcomes are uncertain. A failure of one or more clinical trials can occur at any stage of testing. The outcome of preclinical development testing and early clinical trials may not be predictive of the success of later clinical trials, and interim, top-line, initial or preliminary results of a clinical trial do not necessarily predict final results. Moreover, preclinical and clinical data are often susceptible to varying interpretations and analyses, and many companies that have believed their product candidates performed satisfactorily in preclinical studies and clinical trials have nonetheless failed to obtain regulatory approval of their product candidates. Our preclinical studies and future and ongoing clinical trials may not be successful.

Additionally, some of the clinical trials we conduct may be open-label in study design and may be conducted at a limited number of clinical sites on a limited number of patients. An “open-label” clinical trial is one where both the patient and investigator know whether the patient is receiving the investigational product candidate or either an existing approved drug or placebo. Most typically, open-label clinical trials test only the investigational product candidate and sometimes may do so at different dose levels. Open-label clinical trials are subject to various limitations that may exaggerate any therapeutic effect as patients in open-label clinical trials are aware when they are receiving treatment. Open-label clinical trials may be subject to a “patient bias” where patients perceive their symptoms to have improved merely due to their awareness of receiving an experimental treatment. In addition, open-label clinical trials may be subject to an “investigator bias” where those assessing and reviewing the physiological outcomes of the clinical trials are aware of which patients have received treatment and may interpret the information of the treated group more favorably given this knowledge. The results from an open-label clinical trial may not be predictive of future clinical trial results when studied in a controlled environment with a placebo or active control.

In May 2021, we entered into a license agreement with Roche, or the Roche Agreement, pursuant to which, among other things, Roche granted us an exclusive and sublicensable (subject to Roche’s consent, except with respect to affiliates) worldwide license under certain of Roche’s patent rights and know-how to develop and commercialize bitopertin. Although bitopertin was originally evaluated by Roche in over 4,000 individuals, Roche did not evaluate bitopertin in EPP or XLP, so the safety data generated from Roche’s clinical trials of bitopertin may not be predictive or indicative of the results of our clinical trials. Regulatory authorities may also raise questions regarding the transition in the future from Roche-manufactured drug substance to drug substance manufactured by us or another party, and we may be required to conduct comparability assessments, which could result in delays in development and additional costs. We may face similar challenges with respect to our other product candidates, for which preclinical results may not be indicative or predictive of future clinical trial results.

Because we are developing some of our product candidates for the treatment of diseases in which there is little clinical experience and, in some cases, using new endpoints or methodologies, the FDA or other regulatory authorities may not consider the endpoints of our clinical trials to predict or provide clinically meaningful results.

Many of our product candidates are designed to treat diseases for which there are few available therapeutic options. For example, in the United States there are currently no therapies approved to treat anemia of MF and there is only one approved therapy to treat EPP. As a result, the design and conduct of clinical trials of product candidates for the treatment of these diseases may take longer, be more costly or be less effective as part of the novelty of development in these diseases. In some cases, we may use new or novel endpoints or methodologies. The FDA or other regulatory authorities may not consider the endpoints of our clinical trials to be validated or clinically meaningful and we may need to conduct proof-of-concept studies or additional work to refine our endpoints and inform the design of future studies before initiating pivotal studies of our product candidates. Even if applicable regulatory authorities do not object to our proposed endpoints in an earlier stage clinical trial, such regulatory authorities may require evaluation of additional or different clinical endpoints in later-stage clinical trials.

Even if the FDA does find our clinical trial success criteria to be sufficiently supported and clinically meaningful at the time, we may not achieve the pre-specified endpoint to a degree of statistical significance in any pivotal or other clinical trials we may conduct for our product candidates. Further, even if we do achieve the pre-specified criteria, our trials may produce results that are unpredictable or inconsistent with the results of the more traditional efficacy endpoints in the trial. The FDA also could change its view or give overriding weight to other efficacy endpoints over a primary endpoint, even if we achieve statistically significant results on that primary endpoint, if for example we do not do so on our secondary efficacy endpoints. The FDA also weighs the benefits of

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a product candidate against its risks and the FDA may view the efficacy results in the context of safety as not being supportive of approval. Other regulatory authorities in Europe and other countries may make similar findings with respect to these endpoints.

Interim, top-line, initial and preliminary data from our clinical trials that we announce or publish from time to time may change as more patient data become available and are subject to confirmation, audit and verification procedures that could result in material changes in the final data.

From time to time, we may publicly disclose interim, top-line, initial or preliminary data from our clinical trials, which is based on a preliminary analysis of then-available data, and the results and related findings and conclusions are subject to change following a more comprehensive review of the data. For example, we announced initial data from our Phase 1b/2 DISC-0974 trials in patients with anemia of MF in December 2023 and in June 2024, and in patients with anemia and NDD-CKD in December 2023 and October 2024. We also announced initial data from the SAD portion of the Phase 1 clinical trial of DISC-3405 in healthy volunteers in June 2024. We also may make assumptions, estimations, calculations and conclusions as part of our analyses of data, and may not have received or had the opportunity to fully and carefully evaluate all data. As a result, the interim, top-line, initial or preliminary results that we report may differ from future results of the same trials, or different conclusions or considerations may qualify such results, once additional data have been received and fully evaluated. Interim, top-line, initial and preliminary data from clinical trials are subject to the risk that one or more of the clinical outcomes may materially change as patient enrollment continues and more patient data become available. Interim, top-line, initial and preliminary data also remain subject to audit and verification procedures that may result in the final data being materially different from the interim, top-line, initial or preliminary data we previously published. As a result, interim, top-line, initial and preliminary data should be viewed with caution until the final data are available. Adverse differences between interim, top-line, initial or preliminary data and final data could significantly harm our business prospects and may cause the price of our common stock to fluctuate or decline.

Further, regulatory agencies and others, may not accept or agree with our assumptions, estimates, calculations, conclusions or analyses or may interpret or weigh the importance of data differently, which could adversely impact the potential of the particular program, the likelihood of obtaining regulatory approval of the particular product candidate, commercialization of any approved product and the business prospects of the company in general. In addition, the information we choose to publicly disclose regarding a particular study or clinical trial is derived from information that is typically extensive, and you or others may not agree with what we determine is material or otherwise appropriate information to include in our disclosure.

If the interim, top-line, initial or preliminary data that we report differs from actual results, or if regulatory authorities or others, disagree with the conclusions reached, our ability to obtain approval for, and commercialize, our product candidates may be significantly impaired, which could materially harm our business, operating results, prospects or financial condition.

We may incur additional costs or experience delays in initiating or completing, or ultimately be unable to complete, the development and commercialization of our product candidates.

We may experience delays in initiating or completing our preclinical studies or clinical trials, including as a result of delays in obtaining, or failure to obtain, the FDA’s authorization to initiate clinical trials under future INDs. Additionally, we cannot be certain that preclinical studies or clinical trials for our product candidates will not require redesign, will enroll an adequate number of subjects on time, or will be completed on schedule, if at all. We may experience numerous unforeseen events during, or as a result of, preclinical studies and clinical trials that could delay or prevent our ability to receive regulatory authorizations, regulatory approval or commercialize our product candidates, including:

•we may receive feedback from regulatory authorities that requires us to modify the design or implementation of our preclinical studies or clinical trials or to delay or terminate a clinical trial;

•regulators or institutional review boards, or IRBs, or ethics committees may delay or may not authorize us or our investigators to commence a clinical trial or conduct a clinical trial at a prospective trial site;

•we may experience delays in reaching, or fail to reach, agreement on acceptable terms with prospective trial sites and prospective clinical research organizations, or CROs, the terms of which can be subject to extensive negotiation and may vary significantly among different CROs and trial sites;

•preclinical studies or clinical trials of our product candidates may fail to show safety or efficacy or otherwise produce negative or inconclusive results, and we may decide, or regulators may require us, to conduct additional preclinical studies or clinical trials, or we may decide to abandon product research or development programs;

•preclinical studies or clinical trials of our product candidates may not produce differentiated or clinically significant results across indications;

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•the number of patients required for clinical trials of our product candidates may be larger than anticipated, enrollment in these clinical trials may be slower than anticipated or participants may drop out of these clinical trials or fail to return for post-treatment follow-up at a higher rate than anticipated;

•our third-party contractors may fail to comply with regulatory requirements, fail to maintain adequate quality controls, be unable to provide us with sufficient product supply to conduct or complete preclinical studies or clinical trials, fail to meet their contractual obligations to us in a timely manner, or at all, or may deviate from the clinical trial protocol or drop out of the trial, which may require that we add new clinical trial sites or investigators;

•we may elect to, or regulators or IRBs or ethics committees may require us or our investigators to, suspend or terminate clinical research for various reasons, including noncompliance with regulatory requirements or a finding that the participants in our clinical trials are being exposed to unacceptable health risks;

•the cost of clinical trials of our product candidates may be greater than anticipated;

•the supply or quality of our product candidates or other materials necessary to conduct clinical trials of our product candidates may be insufficient or inadequate, and any transfer of manufacturing activities may require unforeseen manufacturing or formulation changes;

•our product candidates may have undesirable side effects or other unexpected characteristics, causing us, regulators or IRBs or ethics committees to suspend or terminate the trials, or reports may arise from preclinical or clinical testing of other hematologic disease therapies that raise safety or efficacy concerns about our product candidates;

•any future collaborators may conduct clinical trials in ways they view as advantageous to them but that are suboptimal for us; and

•regulators may revise the requirements for approving our product candidates, or such requirements may not be as anticipated.

We could encounter delays if a clinical trial is suspended or terminated by us, by the IRBs or ethics committees of the institutions at which such trials are being conducted or by the FDA or other regulatory authorities, or if the Data Safety Monitoring Board, or DSMB, for such trial recommends suspension or termination of the trial. Such authorities may impose or recommend such a suspension or termination or clinical hold due to a number of factors, including failure to conduct the clinical trial in accordance with regulatory requirements or our clinical protocols, adverse findings upon an inspection of the clinical trial operations or trial site by the FDA or other regulatory authorities, unforeseen safety issues or adverse side effects, failure to demonstrate a benefit from using a product, changes in governmental regulations or administrative actions or lack of adequate funding to continue the clinical trial. For example, we filed an IND in April 2022 with the FDA to initiate the AURORA Phase 2 trial of bitopertin in EPP patients, but the FDA initially placed the initiation of this trial on clinical hold; we received clearance to initiate the study in July 2022 after the study design was finalized with the FDA and initiated the study in October 2022. Many of the factors that cause, or lead to, a delay in the commencement or completion of clinical trials may also ultimately lead to the denial of regulatory approval of our product candidates. Further, the FDA may disagree with our clinical trial design or our interpretation of data from clinical trials or may change the requirements for approval even after it has reviewed and commented on the design for our clinical trials.

Moreover, principal investigators for our current and future clinical trials may serve as scientific advisors or consultants to us from time to time and receive compensation in connection with such services. Under certain circumstances, we may be required to report some of these relationships to the FDA or comparable foreign regulatory authorities. The FDA or comparable foreign regulatory authority may conclude that a financial relationship between us and a principal investigator has created a conflict of interest or otherwise affected the interpretation of the trial. The FDA or comparable foreign regulatory authority may therefore question the integrity of the data generated at the applicable clinical trial site, and the utility of the clinical trial itself may be jeopardized. This could result in a delay in approval, or rejection, of our marketing applications by the FDA or comparable foreign regulatory authority, as the case may be, and may ultimately lead to the denial of regulatory approval of one or more of our product candidates.

Our product development costs will also increase if we experience delays in testing or regulatory approvals. We do not know whether any of our future clinical trials will begin as planned, or whether any of our current or future clinical trials will need to be restructured or will be completed on schedule, if at all. Significant preclinical study or clinical trial delays also could shorten any periods during which we may have the exclusive right to commercialize our product candidates or allow our competitors to bring products to market before we do, which would impair our ability to successfully commercialize our product candidates and may significantly harm our business, operating results, financial condition and prospects.

If we experience delays or difficulties in the enrollment of patients in clinical trials, our receipt of necessary regulatory approvals could be delayed or prevented.

We may not be able to initiate or continue clinical trials for our product candidates if we are unable to locate and enroll a sufficient number of eligible patients to participate in these trials as required by the FDA or comparable foreign regulatory

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authorities, or as needed to provide appropriate statistical power for a given trial. In particular, because we are focused on patients with specific rare hematologic diseases for the development of our product candidates, our ability to enroll eligible patients may be limited or may result in slower enrollment than we anticipate.

We may experience difficulties with identifying specific patient populations for any defined trial cohorts. The patient eligibility criteria defined in our trial protocols may limit the patient populations eligible for our clinical trials. We will also rely on the willingness and ability of clinicians to screen their patients, such as for specific genetic hematologic conditions, to indicate which patients may be eligible for enrollment in our clinical trials.

In addition, some of our competitors have ongoing clinical trials for product candidates that are intended to treat the same indications as our product candidates, and patients who would otherwise be eligible for our clinical trials may choose instead to enroll in clinical trials of our competitors’ product candidates.

Additionally, the process of finding patients may prove costly. We also may not be able to identify, recruit or enroll a sufficient number of patients to complete our clinical trials because of the small patient populations with rare hematologic diseases, the perceived risks and benefits of the product candidates under study, the availability and efficacy of competing therapies and clinical trials, the proximity and availability of clinical trial sites for prospective patients, and the patient referral practices of physicians. If patients are unwilling to participate in our studies for any reason, the timeline for recruiting patients, conducting studies and obtaining regulatory approval of potential products may be delayed.

Patient enrollment may be affected by other factors, including:

•the severity of the disease under investigation;

•the efforts to obtain and maintain patient consents and facilitate timely enrollment in clinical trials;

•the ability to monitor patients adequately during and after treatment;

•the risk that patients enrolled in clinical trials will drop out of the clinical trials before clinical trial completion;

•the ability to recruit clinical trial investigators with the appropriate competencies and experience;

•reporting of the preliminary results of any of our clinical trials; and

•factors we may not be able to control, including the impacts of any public health crises, that may limit patients, principal investigators or staff or clinical site availability.

Results from early preclinical studies and clinical trials of our programs and product candidates are not necessarily predictive of the results of later preclinical studies and clinical trials of our programs and product candidates. If we cannot replicate the results from earlier preclinical studies and clinical trials of our programs and product candidates in our later preclinical studies and clinical trials, we may be unable to successfully develop, obtain regulatory approval for and commercialize our product candidates.

Any results from early preclinical studies and clinical trials of bitopertin, DISC-0974, DISC-0998, DISC-3405 or our other product candidates or programs may not necessarily be predictive of the results from later preclinical studies and clinical trials. For example, we have announced positive initial data from a Phase 1b/2 clinical trial of DISC-0974 in patients with anemia of MF and from a separate Phase 1b/2 clinical trial of DISC-0974 in patients with non-dialysis dependent CKD and anemia. However, there can be no assurance that DISC-0974 will achieve the desired effects in these indications. Additionally, we initiated a Phase 1 clinical trial of DISC-3405 in healthy adult volunteers in October 2023, which may not be indicative or predictive of future clinical trial results. Similarly, even if we are able to complete our planned preclinical studies and clinical trials of our product candidates according to our current development timeline, the results from such preclinical studies and clinical trials of our product candidates may not be replicated in subsequent preclinical studies or clinical trial results.

Many companies in the biopharmaceutical and biotechnology industries have suffered significant setbacks in late-stage clinical trials after achieving positive results in early-stage development, and we cannot be certain that we will not face similar setbacks. These setbacks have been caused by, among other things, preclinical findings made while clinical trials were underway, or safety or efficacy observations made in preclinical studies and clinical trials, including previously unreported adverse events. Moreover, preclinical and clinical data are often susceptible to varying interpretations and analyses and many companies that believed their product candidates performed satisfactorily in preclinical studies and clinical trials nonetheless failed to obtain regulatory approval.

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Our clinical trials or those of our future collaborators may reveal significant adverse events not seen in prior preclinical studies or clinical trials and may result in a safety profile that could inhibit regulatory approval or market acceptance of any of our product candidates.

Before obtaining regulatory approvals for the commercial sale of any products, we must demonstrate through lengthy, complex and expensive preclinical studies and clinical trials that our product candidates regulated as drugs are safe and effective and our product candidates regulated as biologics are safe, pure and potent for use in each target indication. Clinical testing is expensive and can take many years to complete, and outcomes are inherently uncertain. Failure can occur at any time during the clinical trial process. Because our programs and product candidates are in an early stage of development, there is a high risk of failure, and we may never succeed in developing marketable products. There is typically an extremely high rate of attrition from the failure of product candidates proceeding through clinical trials. Product candidates in later stages of clinical trials also may fail to show the desired safety and efficacy profile despite having progressed through preclinical studies and initial clinical trials. For example, Roche had previously developed bitopertin as a potential therapy for certain symptoms of schizophrenia and obsessive-compulsive disorder, but discontinued the program for lack of efficacy in those indications after completing over 30 clinical trials in over 4,000 individuals. If the results of our ongoing or future preclinical studies and clinical trials are inconclusive with respect to the safety and efficacy of our programs and product candidates, if we do not meet the clinical endpoints with statistical and clinically meaningful significance, or if there are safety concerns associated with our product candidates, we may be prevented from, or delayed in, obtaining regulatory approval for such product candidates. In some instances, there can be significant variability in safety or efficacy results between different clinical trials of the same product candidate due to numerous factors, including changes in trial procedures set forth in protocols, differences in the size and type of the patient populations, changes in and adherence to the clinical trial protocols and the rate of dropout among clinical trial participants. Results of our trials could reveal a high and unacceptable severity and prevalence of side effects. In such an event, our trials could be suspended or terminated, and the FDA or comparable foreign regulatory authorities could order us to cease further development of or deny approval of our product candidates for any or all targeted indications. Treatment-related side effects could also affect patient recruitment or the ability of enrolled patients to complete the trial or result in potential product liability claims.

Further, our product candidates could cause undesirable side effects in clinical trials related to on-target toxicity. If on-target toxicity is observed, or if our product candidates have characteristics that are unexpected, we may need to abandon their development or limit development to more narrow uses or subpopulations in which the undesirable side effects or other characteristics are less prevalent, less severe or more acceptable from a risk-benefit perspective. In addition, our product candidates could cause undesirable side effects that have not yet been observed. For example, bitopertin may demonstrate toxicities in patients with hematologic diseases not previously observed by Roche when it was studied in different indications. Many compounds that initially showed promise in early-stage testing have later been found to cause side effects that prevented further development of the compound. Most product candidates that commence clinical trials are never approved as products, and there can be no assurance that any of our current or future clinical trials will ultimately be successful or support further clinical development or regulatory approval of any of our product candidates.

As is the case with many treatments for hematologic and rare diseases, it is likely that there may be side effects associated with the use of our product candidates. If significant adverse events or other side effects are observed in any of our current or future clinical trials, we may have difficulty recruiting patients to our clinical trials, patients may drop out of our trials, or we may be required to abandon the trials or development efforts of one or more product candidates altogether. We, the FDA or other applicable regulatory authorities, or an IRB may suspend or terminate clinical trials of a product candidate at any time for various reasons, including a belief that subjects in such trials are being exposed to unacceptable health risks or adverse side effects. Even if the side effects do not preclude the product from obtaining or maintaining regulatory approval, undesirable side effects may inhibit market acceptance of the approved product due to its tolerability versus other therapies. Any of these developments could materially harm our business, operating results, financial condition and prospects.

Some of our product candidates modulate pathways for which there are currently no approved or effective therapies, which may result in greater research and development expenses, regulatory issues that could delay or prevent approval or discovery of unknown or unanticipated adverse effects on safety or efficacy.

Some of our product candidates modulate pathways for which there are currently no approved or effective therapies, which may result in uncertainty. We select programs for targets based on compelling biological rationale, including evidence of expected biological effects in humans. We explore new programs based on extensive preclinical data analysis which sometimes cannot predict efficacy or safety in humans. Regulatory approval of novel product candidates such as ours can be more expensive, riskier and take longer than for other, more well-known or extensively studied pharmaceutical or biopharmaceutical product candidates due to our and regulatory agencies’ lack of experience with them. The novelty of the mechanism of action of any of our product candidates may lengthen the regulatory review process, require us to conduct additional studies or clinical trials, increase our development costs, lead to changes in regulatory positions and interpretations, delay or prevent approval and commercialization of our product candidates or lead to significant post-approval limitations or restrictions. The novel mechanism of action also means that fewer people are trained in or experienced with product candidates of this type, which may make it more difficult to find, hire and retain personnel for research, development and manufacturing positions. If our product candidates utilize a novel mechanism of action that

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has not been the subject of extensive study compared to more well-known product candidates, there is also an increased risk that we may discover previously unknown or unanticipated adverse effects during our preclinical studies and clinical trials. Our product candidates may achieve lower efficacy in patients than expected. Any such events could adversely impact our business prospects, operating results and financial condition.

We are currently conducting clinical trials for bitopertin in Australia and may in the future conduct additional clinical trials of our product candidates outside the United States, and the FDA and comparable foreign regulatory authorities may not accept data from such trials.

In July 2022, we initiated BEACON, a Phase 2 open-label, parallel-dose clinical trial of bitopertin in EPP and XLP patients conducted at sites in Australia. All participants in BEACON are eligible to participate in HELIOS, an ongoing open-label, long-term extension study of bitopertin in EPP and XLP that we are also conducting in Australia. We may in the future choose to conduct additional clinical trials of our product candidates outside the United States, including in Europe, Australia, or other foreign jurisdictions. The acceptance of trial data from clinical trials conducted outside the United States by the FDA may be subject to certain conditions. In cases where data from clinical trials conducted outside the United States are intended to serve as the sole basis for regulatory approval in the United States, the FDA will generally not approve the application on the basis of foreign data alone unless (i) the data are applicable to the United States population and United States medical practices, (ii) the trials were performed by clinical investigators of recognized competence and (iii) the data may be considered valid without the need for an on-site inspection by the FDA or, if the FDA considers such an inspection to be necessary, the FDA is able to validate the data through an on-site inspection or other appropriate means. Additionally, the FDA’s clinical trial requirements, including sufficient size of patient populations and statistical powering, must be met. Many foreign regulatory bodies have similar approval requirements. In addition, such foreign trials will be subject to the applicable local laws of the foreign jurisdictions where the trials are conducted. There can be no assurance that the FDA or any comparable foreign regulatory authority, including the TGA, will accept data from trials conducted outside of the United States or the applicable jurisdiction. If the FDA or any comparable foreign regulatory authority does not accept such data, it would result in the need for additional trials, which would be costly and time-consuming and delay aspects of our business plan, and which may result in our product candidates not receiving regulatory approval or clearance for commercialization in the applicable jurisdiction.

Although we intend to explore other therapeutic opportunities in addition to the programs and product candidates that we are currently developing, we may fail to identify viable new product candidates for clinical development for a number of reasons. If we fail to identify additional product candidates, our business could be materially harmed.

Research programs to pursue the development of our existing and planned product candidates for additional indications and to identify new product candidates and disease targets require substantial technical, financial and human resources whether or not they are ultimately successful. Our research programs may initially show promise in identifying potential indications and/or product candidates, yet fail to yield results for clinical development for a number of reasons, including:

•the research methodology used may not be successful in identifying potential indications and/or product candidates;

•potential product candidates may, after further study, be shown to have harmful adverse effects or other characteristics that indicate they are unlikely to be effective products; or

•it may take greater human and financial resources than we will possess to identify additional therapeutic opportunities for our product candidates or to develop suitable potential product candidates through internal research programs, thereby limiting our ability to develop, diversify and expand our product portfolio.

Because we have limited financial and human resources, we intend to initially focus on research programs and product candidates for a limited set of indications. As a result, we may forego or delay pursuit of opportunities with other product candidates or for other indications that later prove to have greater commercial potential or a greater likelihood of success. Our resource allocation decisions may cause us to fail to capitalize on viable commercial products or profitable market opportunities.

Accordingly, there can be no assurance that we will ever be able to identify additional therapeutic opportunities for our product candidates or to develop suitable product candidates through internal research programs, which could materially adversely affect our future growth and prospects. We may focus our efforts and resources on potential product candidates or other potential programs that ultimately prove to be unsuccessful.

If we are not able to obtain, or if there are delays in obtaining, required regulatory approvals for our product candidates, we will not be able to commercialize, or will be delayed in commercializing, our product candidates, and our ability to generate revenue will be materially impaired.

Our product candidates and the activities associated with their development and commercialization, including their design, testing, manufacture, safety, efficacy, recordkeeping, labeling, storage, approval, advertising, promotion, sale, distribution, import and export are subject to comprehensive regulation by the FDA and other regulatory agencies in the United States and by comparable foreign regulatory authorities. Before we can commercialize any of our product candidates, we must obtain regulatory approval.

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Currently, all of our product candidates are in discovery, preclinical or clinical development, and we have not received approval to market any of our product candidates from regulatory authorities in any jurisdiction. It is possible that our product candidates, including any product candidates we may seek to develop in the future, will never obtain regulatory approval. We have limited experience in filing and supporting the applications necessary to gain regulatory approvals and rely on third-party CROs and/or regulatory consultants to assist us in this process. Securing regulatory approval requires the submission of extensive preclinical and clinical data and supporting information to the various regulatory authorities for each therapeutic indication to establish the product candidate’s safety and efficacy. Securing regulatory approval also requires the submission of information about the product manufacturing process to, and inspection of manufacturing facilities by, the relevant regulatory authority. Our product candidates may not be effective, may be only moderately effective or may prove to have undesirable or unintended side effects, toxicities or other characteristics that may preclude us from obtaining regulatory approval or prevent or limit commercial use. In addition, regulatory authorities may find fault with our manufacturing process or facilities or that of third-party contract manufacturers. We may also face greater than expected difficulty in manufacturing our product candidates.

The process of obtaining regulatory approvals, both in the United States and abroad, is expensive and often takes many years. If the FDA or a comparable foreign regulatory authority requires that we perform additional preclinical studies or clinical trials, approval may be delayed, if obtained at all. The length of such a delay varies substantially based upon a variety of factors, including the type, complexity and novelty of the product candidate involved. Changes in regulatory approval policies during the development period, changes in or enactment of additional statutes or regulations, or changes in regulatory review policies for each submitted NDA, BLA, or equivalent application types, may cause delays in the approval or rejection of an application. The FDA and comparable foreign regulatory authorities have substantial discretion in the approval process and may refuse to accept any application or may decide that our data is insufficient for approval and require additional preclinical, clinical or other studies. Our product candidates could be delayed in receiving, or fail to receive, regulatory approval for many reasons, including the following:

•the FDA or comparable foreign regulatory authorities may disagree with the design or implementation of our clinical trials;

•We may not be able to enroll a sufficient number of patients in our clinical trials;

•We may be unable to demonstrate to the satisfaction of the FDA or comparable foreign regulatory authorities that a product candidate is safe and effective for its proposed indication;

•the results of clinical trials may not meet the level of statistical significance required by the FDA or comparable foreign regulatory authorities for approval;

•We may be unable to demonstrate that a product candidate’s clinical and other benefits outweigh its safety risks;

•the FDA or comparable foreign regulatory authorities may disagree with our interpretation of data from preclinical studies or clinical trials;

•the data collected from clinical trials of our product candidates may not be sufficient to support the submission of an NDA, BLA or other submission or to obtain regulatory approval in the United States or elsewhere;

•the FDA or comparable foreign regulatory authorities may find deficiencies with or fail to approve the manufacturing processes or facilities of third-party manufacturers with which we contract for clinical and commercial supplies; and

•the approval policies or regulations of the FDA or comparable foreign regulatory authorities may significantly change such that our clinical data are insufficient for approval.

Even if we were to obtain regulatory approval, regulatory authorities may approve any of our product candidates for fewer or more limited indications than we request, thereby narrowing the commercial potential of the product candidate. In addition, regulatory authorities may grant approval contingent on the performance of costly post-marketing clinical trials, or may approve a product candidate with a label that does not include the labeling claims necessary or desirable for the successful commercialization of that product candidate. Any of the foregoing scenarios could materially harm the commercial prospects for our product candidates.

If we experience delays in obtaining, or if we fail to obtain, approval of our product candidates, the commercial prospects for our product candidates may be harmed and our ability to generate revenue will be materially impaired.

A public health crisis, pandemic, epidemic, or outbreak of an infectious or highly contagious disease, may materially and adversely affect our business and financial results and could cause a disruption to the development of our product candidates.

Public health crises such as pandemics or similar outbreaks could adversely impact our business. The extent to which an outbreak of highly infectious or contagious diseases impacts our operations or those of our third-party partners, including our preclinical studies or clinical trial operations, will depend on future developments, which are highly uncertain and cannot be predicted with confidence, including the scope, severity and duration of the outbreak, actions taken to contain the outbreak or mitigate its impact, and the direct and indirect economic effects of the outbreak and containment measures, among others.

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In addition, the patient populations that our product candidates target may be particularly susceptible to highly infectious or contagious diseases, which may make it more difficult for us to identify patients able to enroll in our current and future clinical trials and may impact the ability of enrolled patients to complete any such trials.

Risks Related to Commercialization

We face substantial competition, which may result in others discovering, developing or commercializing products before or more successfully than we do.

The development and commercialization of new products in the biopharmaceutical and related industries is highly competitive. We compete in the segments of the pharmaceutical, biotechnology, and other related markets that develop therapies in the field of hematologic diseases. There are other companies focusing on developing therapies in the field of hematologic diseases. We also compete more broadly across the market for cost-effective and reimbursable treatments. Some of these competitive products and therapies are based on scientific approaches that are the same as or similar to our approach, and others are based on entirely different approaches. These companies include divisions of large pharmaceutical companies and biotechnology companies of various sizes. We face competition with respect to our current product candidates, and will face competition with respect to any product candidates that we may seek to develop or commercialize in the future, from major pharmaceutical companies, specialty pharmaceutical companies and biotechnology companies worldwide. Potential competitors also include academic institutions, government agencies and other public and private research organizations that conduct research, seek patent protection and establish collaborative arrangements for research, development, manufacturing and commercialization. See “Business—Competition” of our Annual Report on Form 10-K for the year ended December 31, 2023 for examples of the competition that our product candidates face.

Any product candidates that we successfully develop and commercialize will compete with currently approved therapies and new therapies that may become available in the future from segments of the pharmaceutical, biotechnology and other related markets. Key product features that would affect our ability to effectively compete with other therapeutics include the efficacy, safety and convenience of our products. We believe principal competitive factors to our business include, among other things, our ability to successfully transition research programs into clinical development, ability to raise capital and the scalability of the platform, pipeline and business.

Many of the companies that we compete against or which we may compete against in the future have significantly greater financial resources and expertise in research and development, manufacturing, preclinical and clinical testing, obtaining regulatory approvals and marketing approved products than we do. Mergers and acquisitions in the pharmaceutical and biotechnology industries may result in even more resources being concentrated among a smaller number of our competitors. Smaller or early-stage companies may also prove to be significant competitors, particularly through collaborative arrangements with large and established companies. These competitors also compete with us in recruiting and retaining qualified scientific and management personnel and establishing clinical trial sites and patient registration for clinical trials, as well as in acquiring technologies complementary to, or necessary for, our programs. If these or other barriers to entry do not remain in place, other companies may be able to more directly or effectively compete with us.

Our commercial opportunity could be reduced or eliminated if our competitors develop and commercialize products that are safer, more effective, have fewer or less severe side effects, are more convenient or are less expensive than any products that we or our collaborators may develop. Our competitors also may obtain FDA or other regulatory approval for their products sooner than we may obtain approval for our product candidates, which could result in our competitors establishing a strong market position before we or our collaborators are able to enter the market. The key competitive factors affecting the success of all of our product candidates, if approved, are likely to be their efficacy, safety, convenience, price, level of generic competition and availability of reimbursement from government and other third-party payors.

If the market opportunities for our programs and product candidates are smaller than we estimate or if any regulatory approval that we obtain is based on a narrower definition of the patient population, our revenue and ability to achieve profitability could be materially adversely affected.

The incidence and prevalence for the target patient populations of our programs and product candidates have not been established with precision. Our lead heme biosynthesis modulation product candidate, bitopertin, is an oral, selective inhibitor of GlyT1. We are initially focused on developing bitopertin for the treatment of EPP and XLP, which are both diseases marked by severe photosensitivity and damage to the hepatobiliary system caused by the accumulation of PPIX. We are initially focused on developing DISC-0974 for anemia of MF and anemia of non-dialysis dependent CKD. We are initially focused on developing DISC-3405 for the treatment of PV. Our projections of both the number of people who have these diseases, as well as the subset of people with these diseases who have the potential to benefit from treatment with our programs and product candidates, are based on our estimates.

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The total addressable market opportunity will ultimately depend upon, among other things, the diagnosis criteria included in the final label, the indications for which our product candidates are approved for sale, acceptance by the medical community and patient access, product pricing and reimbursement. The number of patients with erythropoietic porphyria and anemias of inflammation for which our product candidates may be approved as treatment may turn out to be lower than expected, patients may not be otherwise amenable to treatment with our products, or new patients may become increasingly difficult to identify or gain access to, all of which would adversely affect our results of operations and our business. We may not be successful in our efforts to identify additional product candidates. Due to our limited resources and access to capital, we must prioritize development of certain product candidates, which may prove to be the wrong choice and may adversely affect our business.

If our current product candidates or any future product candidates do not achieve broad market acceptance, the revenue that we generate from our sales may be limited, and we may never become profitable.

We have never commercialized a product candidate for any indication. Even if our current product candidates and any future product candidates are approved by the appropriate regulatory authorities for marketing and sale, they may not gain acceptance among physicians, patients, third-party payors, and others in the medical community. If any product candidates for which we may obtain regulatory approval do not gain an adequate level of market acceptance, we may not generate significant revenue and may not become profitable or may be significantly delayed in achieving profitability. Market acceptance of our current product candidates and any future product candidates by the medical community, patients and third-party payors will depend on a number of factors, some of which are beyond our control. For example, physicians are often reluctant to switch their patients, and patients may be reluctant to switch, from existing therapies even when new and potentially more effective or safer treatments enter the market. If public perception is influenced by claims that the use of heme biosynthesis modulation therapies or hepcidin-targeted agents is unsafe, whether related to our or our competitors’ products, our products may not be accepted by the general public or the medical community. Future adverse events in the hematologic diseases or the biopharmaceutical industry could also result in greater governmental regulation, stricter labeling requirements and potential regulatory delays in the testing or approvals of our product candidates.

In the United States and markets in other countries, patients generally rely on third-party payors to reimburse all or part of the costs associated with their treatment. Adequate coverage and reimbursement from governmental healthcare programs, such as Medicare and Medicaid, and commercial payors is critical to new product acceptance. Our ability to successfully commercialize our product candidates will depend in part on the extent to which coverage and adequate reimbursement for these products and related treatments will be available from government health administration authorities, private health insurers and other organizations. Even if coverage is provided, the approved reimbursement amount may not be high enough to allow us to establish or maintain pricing sufficient to realize a sufficient return on our investment. Government authorities and third-party payors, such as private health insurers and health maintenance organizations, decide which medications they will pay for and establish reimbursement levels.

Efforts to educate the medical community and third-party payors on the benefits of our current product candidates and any future product candidates may require significant resources and may not be successful. If our current product candidates or any future product candidates are approved but do not achieve an adequate level of market acceptance, we could be prevented from or significantly delayed in achieving profitability. The degree of market acceptance of any of our current product candidates and any future product candidates will depend on a number of factors, including:

•the efficacy of our current product candidates and any future product candidates;

•the prevalence and severity of adverse events associated with our current product candidates and any future product candidates;

•the clinical indications for which our product candidates are approved and the approved claims that we may make for the products;

•limitations or warnings contained in the product’s FDA-approved labeling or those of comparable foreign regulatory authorities, including potential limitations or warnings for our current product candidates and any future product candidates that may be more restrictive than other competitive products;

•changes in the standard of care for the targeted indications for our current product candidates and any future product candidates, which could reduce the marketing impact of any claims that we could make following FDA approval or approval by comparable foreign regulatory authorities, if obtained;

•the relative convenience and ease of administration of our current product candidates and any future product candidates;

•the cost of treatment compared with the economic and clinical benefit of alternative treatments or therapies;

•the availability of adequate coverage or reimbursement by third-party payors, including government healthcare programs such as Medicare and Medicaid and other healthcare payors;

•the price concessions required by third-party payors to obtain coverage;

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•the willingness of patients to pay out-of-pocket in the absence of adequate coverage and reimbursement;

•the extent and strength of our marketing and distribution of our current product candidates and any future product candidates;

•the safety, efficacy, and other potential advantages over, and availability of, alternative treatments already used or that may later be approved;

•distribution and use restrictions imposed by the FDA or comparable foreign regulatory authorities with respect to our current product candidates and any future product candidates or to which we agree as part of a Risk Evaluation and Mitigation Strategy, or REMS, or voluntary risk management plan;

•the timing of market introduction of our current product candidates and any future product candidates, as well as competitive products;

•our ability to offer our current product candidates and any future product candidates for sale at competitive prices;

•the willingness of the target patient population to try new therapies and of physicians to prescribe these therapies;

•the extent and strength of our third-party manufacturer and supplier support;

•the approval of other new products;

•adverse publicity about our current product candidates and any future product candidates or favorable publicity about competitive products; and

•potential product liability claims.

There is also significant uncertainty related to the insurance coverage and reimbursement of newly approved products and coverage may be more limited than the purposes for which the medicine is approved by the FDA or comparable foreign regulatory authorities. In the United States, the principal decisions about reimbursement for new medicines are typically made by the Centers for Medicare & Medicaid Services, or CMS, an agency within the U.S. Department of Health and Human Services, or HHS. CMS decides whether and to what extent a new medicine will be covered and reimbursed under Medicare and private payors tend to follow CMS to a substantial degree.

We may not be successful in addressing these or other factors that might affect the market acceptance of our product candidates. Failure to achieve widespread market acceptance of our product candidates would materially harm our business, financial condition and results of operations.

Even if we receive regulatory approval for any of our product candidates, we will be subject to ongoing regulatory obligations and continued regulatory review, which may result in significant additional expense. Additionally, our product candidates, if approved, could be subject to post-market study requirements, marketing and labeling restrictions and even recall or market withdrawal if unanticipated safety issues are discovered following approval. In addition, we may be subject to penalties or other enforcement action if we fail to comply with regulatory requirements.

If the FDA or a comparable foreign regulatory authority approves any of our product candidates, the manufacturing processes, labeling, packaging, distribution, import, export, adverse event reporting, storage, advertising, promotion, monitoring and recordkeeping for the product will be subject to extensive and ongoing regulatory requirements. These requirements include submissions of safety and other post-marketing information and reports, establishment registration and listing, as well as continued compliance with cGMPs and GCPs for any clinical trials that we conduct post-approval. Any regulatory approvals that we receive for our product candidates may also be subject to limitations on the approved indicated uses for which the product may be marketed or to the conditions of approval, or contain requirements for potentially costly post-marketing studies, including Phase 4 clinical trials, and surveillance to monitor the safety and efficacy of the product. The FDA may also require a REMS in order to approve our product candidates, which could entail requirements for a medication guide, physician communication plans or additional elements to ensure safe use, such as restricted distribution methods, patient registries and other risk minimization tools. For certain commercial prescription drug and biological products, manufacturers and other parties involved in the supply chain must also meet chain of distribution requirements and build electronic, interoperable systems for product tracking and tracing and for notifying the FDA of counterfeit, diverted, stolen and intentionally adulterated products or other products that are otherwise unfit for distribution in the United States. Additionally, under the Food and Drug Omnibus Reform Act of 2022, or FDORA, sponsors of approved drugs and biologics must provide 6 months’ notice to the FDA of any changes in marketing status, such as the withdrawal of a drug, and failure to do so could result in the FDA placing the product on a list of discontinued products, which would revoke the product’s ability to be marketed. Later discovery of previously unknown problems with a product, including adverse events of unanticipated severity or frequency, or with our third-party manufacturers or manufacturing processes, or failure to comply with regulatory requirements, may result in, among other things:

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•restrictions on the marketing or manufacturing of the product, withdrawal of the product from the market or voluntary or mandatory product recalls;

•manufacturing delays and supply disruptions where regulatory inspections identify observations of noncompliance requiring remediation;

•revisions to the labeling, including limitation on approved uses or the addition of additional warnings, contraindications or other safety information, including boxed warnings;

•imposition of a REMS which may include distribution or use restrictions;

•requirements to conduct additional post-market clinical trials to assess the safety of the product;

•clinical trial holds;

•fines, warning letters or other regulatory enforcement action;

•refusal by the FDA to approve pending applications or supplements to approved applications filed by us or suspension or revocation of approvals;

•product seizure or detention, or refusal to permit the import or export of products; and

•injunctions or the imposition of civil or criminal penalties.

The FDA’s and other regulatory authorities’ policies may change and additional government regulations may be enacted that could prevent, limit or delay regulatory approval of our product candidates. In addition, the U.S. Supreme Court’s July 2024 decision to overturn established case law giving deference to regulatory agencies’ interpretations of ambiguous statutory language has introduced uncertainty regarding the extent to which the FDA’s regulations, policies and decisions may become subject to increasing legal challenges, delays, and/or changes. If we are slow or unable to adapt to changes in existing requirements or the adoption of new requirements or policies, or if we are not able to maintain regulatory compliance, we may lose any regulatory approval that we may have obtained, which would adversely affect our business, prospects and ability to achieve or sustain profitability.

Risks Related to Our Reliance on Third Parties

We rely on third parties to conduct our Phase 2 clinical trials of bitopertin, Phase 1b/2 clinical trials of DISC-0974 and Phase 1 clinical trial of DISC-3405 and expect to rely on third parties to conduct our planned APOLLO clinical trial of bitopertin and other clinical trials for our product candidates, as well as potential investigator-sponsored clinical trials of our product candidates. If these third parties do not successfully carry out their contractual duties, comply with regulatory requirements, or meet expected deadlines, we may not be able to obtain regulatory approval for or commercialize our product candidates and our business could be substantially harmed.

We do not have the ability to independently conduct clinical trials. We rely and expect to continue to rely on medical institutions, clinical investigators, contract laboratories and other third parties, such as CROs, to conduct or otherwise support clinical trials for our product candidates, including our Phase 2 clinical trials of bitopertin, our Phase 1b/2 clinical trials of DISC-0974 in patients with anemia of MF or non-dialysis dependent CKD and anemia, our Phase 1 trial of DISC-3405, our planned APOLLO clinical trial of bitopertin in EPP, as well as any other product candidates that we develop. We may also rely on academic and private non-academic institutions to conduct and sponsor clinical trials relating to our product candidates, such as the ongoing clinical trial of bitopertin in DBA, which is being conducted by NIH under a collaborative research and development agreement. We will not control the design or conduct of any investigator-sponsored trials, and it is possible that the FDA or non-U.S. regulatory authorities will not view these investigator-sponsored trials as providing adequate support for future clinical trials, whether controlled by us or third parties, for any one or more reasons, including elements of the design or execution of the trials or safety concerns or other trial results.

Such arrangements will likely provide us certain information rights with respect to the investigator-sponsored trials, including access to and the ability to use and reference the data, including for our own regulatory filings, resulting from the investigator-sponsored trials. However, we would not have control over the timing and reporting of the data from investigator-sponsored trials, nor would we own the data from the investigator-sponsored trials. If we are unable to confirm or replicate the results from the investigator-sponsored trials or if negative results are obtained, we would likely be further delayed or prevented from advancing further clinical development of our product candidates. Further, if investigators or institutions breach their obligations with respect to the clinical development of our product candidates, or if the data proves to be inadequate compared to the first-hand knowledge we might have gained had the investigator-sponsored trials been sponsored and conducted by us, then our ability to design and conduct any future clinical trials ourself may be adversely affected.

We rely and expect to continue to rely heavily on these parties for execution of clinical trials for our product candidates and control only certain aspects of our activities. Nevertheless, we are responsible for ensuring that each of our clinical trials is conducted in accordance with the applicable protocol, legal and regulatory requirements and scientific standards, and our reliance on CROs or

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other third parties will not relieve us of our regulatory responsibilities. For any violations of laws and regulations during the conduct of our clinical trials, we could be subject to warning letters or enforcement action that may include civil penalties up to and including criminal prosecution.

We, our principal investigators and our CROs are required to comply with regulations, including GCPs, for conducting, monitoring, recording and reporting the results of clinical trials to ensure that the data and results are scientifically credible and accurate, and that the trial patients are adequately informed of the potential risks of participating in clinical trials and their rights are protected. These regulations are enforced by the FDA, the Competent Authorities of the Member States of the European Economic Area, or the EEA, and comparable foreign regulatory authorities for any products in clinical development. The FDA enforces GCP regulations through periodic inspections of clinical trial sponsors, principal investigators and trial sites. If we, our principal investigators or our CROs fail to comply with applicable GCPs, the clinical data generated in our clinical trials may be deemed unreliable and the FDA or comparable foreign regulatory authorities may require us to perform additional clinical trials before approving our marketing applications. We cannot assure you that, upon inspection, the FDA will determine that any of our future clinical trials will comply with GCPs. In addition, our clinical trials must be conducted with product candidates produced under current Good Manufacturing Practice, or cGMP, regulations. Our failure or the failure of our principal investigators or CROs to comply with these regulations may require us to repeat clinical trials, which would delay the regulatory approval process, significantly increase our expenditures and could also subject us to enforcement action. We also are required to register ongoing clinical trials and post the results of completed clinical trials on a government-sponsored database, ClinicalTrials.gov, within certain timeframes. Failure to do so can result in fines, adverse publicity and civil and criminal sanctions.

Although we designed our ongoing Phase 1b/2 clinical trials of DISC-0974, ongoing Phase 2 clinical trials of bitopertin, and ongoing Phase 1 clinical trial of DISC-3405, and intend to design our planned APOLLO clinical trial of bitopertin and other future clinical trials for our product candidates, these trials are or will be conducted by CROs and we expect CROs will conduct all of our future clinical trials. As a result, many important aspects of our development programs, including their conduct and timing, are outside of our direct control. Our reliance on third parties to conduct future clinical trials also results in less direct control over the management of data developed through clinical trials than would be the case if we were relying entirely upon our own staff. Communicating with outside parties can also be challenging, potentially leading to mistakes as well as difficulties in coordinating activities. Outside parties may:

•have staffing difficulties;

•fail to comply with contractual obligations;

•experience regulatory compliance issues;

•undergo changes in priorities or become financially distressed; or

•form relationships with other entities, some of which may be our competitors.

These factors may materially adversely affect the willingness or ability of third parties to conduct our clinical trials and may subject us to unexpected cost increases that are beyond our control. If the principal investigators or CROs do not perform clinical trials in a satisfactory manner, breach their obligations to us or fail to comply with regulatory requirements, the development, regulatory approval and commercialization of our product candidates may be delayed, we may not be able to obtain regulatory approval and commercialize our product candidates or our development program may be materially and irreversibly harmed. If we are unable to rely on clinical data collected by our principal investigators or CROs, we could be required to repeat, extend the duration of, or increase the size of any clinical trials we conduct and this could significantly delay commercialization and require significantly greater expenditures.

If any of our relationships with these third-party principal investigators or CROs terminate, we may not be able to enter into arrangements with alternative CROs. If principal investigators or CROs do not successfully carry out their contractual obligations or meet expected deadlines, if they need to be replaced or if the quality or accuracy of the clinical data they obtain is compromised due to the failure to adhere to our clinical protocols, regulatory requirements or for other reasons, any clinical trials such principal investigators or CROs are associated with may be extended, delayed or terminated, and we may not be able to obtain regulatory approval for, or successfully commercialize, our product candidates. As a result, we believe that our financial results and the commercial prospects for our product candidates in the subject indication would be harmed, our costs could increase and our ability to generate revenue could be delayed.

We might not realize the anticipated benefits of our current collaborations with Mabwell or NIH, or any other collaborations we enter into in the future.

Research, development, commercialization and/or strategic collaborations, including those that we have with Mabwell and NIH, are subject to numerous risks, which include the following:

•collaborators may have significant control or discretion in determining the efforts and resources that they will apply to a collaboration, and might not commit sufficient efforts and resources or might misapply those efforts and resources;

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•we may have limited influence or control over the approaches to research, development and/or commercialization of product candidates in the territories in which our collaboration partners lead research, development and/or commercialization;

•collaborators might not pursue research, development and/or commercialization of collaboration product candidates or might elect not to continue or renew research, development and/or commercialization programs based on preclinical studies and/or clinical trial results, changes in their strategic focus, availability of funding or other factors, such as a business combination that diverts resources or creates competing priorities;

•collaborators might delay, provide insufficient resources to, or modify or stop research or clinical development for collaboration product candidates or require a new formulation of a product candidate for clinical testing;

•collaborators with sales, marketing and distribution rights to one or more product candidates might not commit sufficient resources to sales, marketing and distribution or might otherwise fail to successfully commercialize those product candidates;

•collaborators might not properly maintain or defend our intellectual property rights or might use our intellectual property improperly or in a way that jeopardizes our intellectual property or exposes us to potential liability;

•collaboration activities might result in the collaborator having intellectual property covering our activities or product candidates, which could limit our rights or ability to research, develop and/or commercialize our product candidates;

•collaborators might not be in compliance with laws applicable to their activities under the collaboration, which could impact the collaboration and us;

•disputes might arise between a collaborator and us that could cause a delay or termination of the collaboration or result in costly litigation that diverts management attention and resources; and

•collaborations might be terminated, which could result in a need for additional capital to pursue further research, development and/or commercialization of our product candidates.

In addition, funding provided by a collaborator might not be sufficient to advance product candidates under the collaboration. If a collaborator terminates a collaboration or a program under a collaboration, including by failing to exercise a license or other option under the collaboration, whether because we fail to meet a milestone or otherwise, any potential revenue from the collaboration would be significantly reduced or eliminated. In addition, we will likely need to either secure other funding to advance research, development and/or commercialization of the relevant product candidate or abandon that program, the development of the relevant product candidate could be significantly delayed, and our cash expenditures could increase significantly if we are to continue research, development and/or commercialization of the relevant product candidates.

Any one or more of these risks, if realized, could reduce or eliminate future revenue from product candidates under our collaborations, and could have a material adverse effect on our business, financial condition, results of operations and/or growth prospects.

We have established collaborations with Mabwell and NIH and may seek to establish additional collaborations, and, if we are not able to establish them on commercially reasonable terms, or at all, we may have to alter our development and commercialization plans.

Our product development programs and the potential commercialization of our product candidates will require substantial additional cash to fund expenses. For some of our product candidates, we may decide to collaborate with pharmaceutical and biotechnology companies, such as our collaborations with Mabwell and NIH, for the development and potential commercialization of those product candidates.

We face significant competition in seeking appropriate collaborators. Whether we reach a definitive agreement for a collaboration will depend, among other things, upon our assessment of the collaborator’s resources and expertise, the terms and conditions of the proposed collaboration and the proposed collaborator’s own evaluation of a potential collaboration. Such factors a potential collaborator will use to evaluate a collaboration may include the design or results of clinical trials, the likelihood of approval by the FDA or comparable foreign regulatory authorities, the potential market for the subject product candidate, the costs and complexities of manufacturing and delivering such product candidate to patients, the potential of competing products, the existence of uncertainty with respect to our ownership of technology, which can exist if there is a challenge to such ownership without regard to the merits of the challenge and industry and market conditions generally. The collaborator may also consider alternative product candidates or technologies for similar indications that may be available to collaborate on and whether such a collaboration could be more attractive than the one with us for our product candidate. The terms of any additional collaborations or other arrangements that we may establish may not be favorable to us.

We are also restricted by Roche’s right of first negotiation under our current license agreement with them and may in the future be restricted under other license or collaboration agreements from entering into future agreements on certain terms with

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potential collaborators. Collaborations are complex and time-consuming to negotiate and document. In addition, there have been a significant number of recent business combinations among large pharmaceutical companies that have resulted in a reduced number of potential future collaborators.

We may not be able to negotiate collaborations on a timely basis, on acceptable terms, or at all. If we are unable to do so, we may have to curtail the development of the product candidate for which we are seeking to collaborate, reduce or delay our development program or one or more of our other development programs, delay our potential commercialization or reduce the scope of any sales or marketing activities, or increase our expenditures and undertake development or commercialization activities at our own expense. If we elect to increase our expenditures to fund development or commercialization activities on our own, we may need to obtain additional capital, which may not be available to us on acceptable terms or at all. If we do not have sufficient funds, we may not be able to further develop our product candidates or bring them to market and generate product revenue.

In addition, any future collaborations that we enter into may not be successful. The success of our collaboration arrangements will depend heavily on the efforts and activities of our collaborators. Collaborators generally have significant discretion in determining the efforts and resources that they will apply to these collaborations. Disagreements between parties to a collaboration arrangement regarding clinical development and commercialization matters can lead to delays in the development process or commercializing the applicable product candidate and, in some cases, termination of the collaboration arrangement. These disagreements can be difficult to resolve if neither of the parties has final decision-making authority. Collaborations with pharmaceutical or biotechnology companies and other third parties often are terminated or allowed to expire by the other party. Any such termination or expiration would adversely affect us financially and could harm our business reputation.

We contract with third parties for the manufacture of our product candidates for preclinical development and clinical testing and expect to continue to do so for commercialization. This reliance on third parties increases the risk that we will not have sufficient quantities of our product candidates or products or such quantities at an acceptable cost, which could delay, prevent, or impair our development or commercialization efforts.

We do not currently own or operate, nor do we have any plans to establish in the future, any manufacturing facilities. Although we believe we have obtained sufficient material to produce bitopertin tablets to complete our ongoing Phase 2 clinical trials, DISC-0974 vials to complete our ongoing Phase 1b/2 clinical trials, and vials to complete our Phase 1 trial of DISC-3405, we cannot be sure we have correctly estimated our drug product and API requirements or that such drug product or API will not expire before we want to use it. While we have identified a contract development and manufacturing organization, or CDMO, to produce our own GMP material, we are in the early stages of manufacturing such material. We rely, and expect to continue to rely, on third parties for the manufacture of our product candidates for preclinical development and clinical testing, including Mabwell for the supply of vials to complete our Phase 1 trial of DISC-3405. We also expect to rely on third parties for the commercial manufacture of our products if any of our product candidates receive regulatory approval. This reliance on third parties increases the risk that we will not have sufficient quantities of our product candidates or products or such quantities at an acceptable cost or quality, which could delay, prevent or impair our development or commercialization efforts.

The facilities used by our CDMOs to manufacture our product candidates must be inspected by the FDA pursuant to pre-approval inspections that will be conducted after we submit our marketing applications to the FDA. We do not control the manufacturing process of, and will be completely dependent on, our CDMOs for compliance with cGMPs in connection with the manufacture of our product candidates. If our CDMOs cannot successfully manufacture material that conforms to our specifications and the strict regulatory requirements of the FDA or others, they will not be able to pass regulatory inspections and/or maintain regulatory compliance for our manufacturing facilities. In addition, we have no control over the ability of our CDMOs to maintain adequate quality control, quality assurance and qualified personnel. If the FDA or a comparable foreign regulatory authority finds deficiencies with or does not approve these facilities for the manufacture of our product candidates or if it finds deficiencies or withdraws any such approval in the future, we may need to find alternative manufacturing facilities, which would significantly impact our ability to develop, obtain regulatory approval for or market our product candidates, if approved.

If any CDMO with whom we contract fails to perform its obligations, we may be forced to enter into an agreement with a different CDMO, which we may not be able to do on reasonable terms, if at all. In such a scenario, our clinical trials supply could be delayed significantly as we established alternative supply sources. In some cases, the technical skills required to manufacture our product candidates may be unique or proprietary to the original CDMO and we may have difficulty, or there may be contractual restrictions prohibiting us from, transferring such skills to a back-up or alternate supplier, or we may be unable to transfer such skills at all. In addition, if we are required to change CDMOs for any reason, we will be required to verify that the new CDMO maintains facilities and procedures that comply with quality standards and with all applicable regulations. We will also need to verify, such as through a manufacturing comparability study, that any new manufacturing process will produce our product candidate according to the specifications previously submitted to the FDA or another regulatory authority. The delays associated with the verification of a new CDMO could negatively affect our ability to develop product candidates or commercialize our products in a timely manner or within budget. In addition, changes in manufacturers often involve changes in manufacturing procedures and processes, which could require that we conduct bridging studies between our prior clinical supply used in our clinical trials and that of any new manufacturer. We may be unsuccessful in demonstrating the comparability of clinical supplies which could require the conduct of additional clinical trials.

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Further, our failure, or the failure of our CDMOs, to comply with applicable regulations could result in sanctions being imposed on it, including clinical holds, fines, injunctions, civil penalties, delays, suspension or withdrawal of approvals, license revocation, seizures or recalls of product candidates or products, if approved, operating restrictions and criminal prosecutions, any of which could significantly and adversely affect our business and supplies of our product candidates.

We may be unable to establish any additional agreements with CDMOs or do so on acceptable terms. Reliance on CDMOs entails additional risks, including:

•reliance on the third party for regulatory compliance and quality assurance;

•the possible breach of the manufacturing agreement by the third party;

•the possible misappropriation of our proprietary information, including our trade secrets and know-how; and

•the possible termination or nonrenewal of the agreement by the third party at a time that is costly or inconvenient for us.

Our product candidates and any products that we may develop may compete with other product candidates and approved products for access to manufacturing facilities. There are a limited number of CDMOs that operate under cGMP regulations and that might be capable of manufacturing for us.

Any performance failure on the part of our existing or future manufacturers could delay clinical development or regulatory approval. If our current CDMOs cannot perform as agreed, we may be required to replace such CDMOs. In addition, there has been increased governmental focus in the U.S. on contracting with Chinese companies for the development or manufacturing of pharmaceutical products. For example, there have been Congressional legislative proposals, such as the bill titled the BIOSECURE Act, which would, among other things, prohibit U.S. federal funding in connection with biotechnology equipment or services produced or provided by certain named Chinese “biotechnology companies of concern” (which includes WuXi AppTech (Hong Kong) Limited, or WuXi) and loans and grants to, and federal contracts with any entity that uses biotechnology equipment or services from one of these entities. The legislation also gives the federal government the authority to name additional “biotechnology companies of concern” that are engaged in research activities with the Chinese government and that pose a risk of U.S. national security. The most recent version of the BIOSECURE Act would delay the application of the BIOSECURE Act’s provisions (i) until January 1, 2032, with respect to biotechnology equipment and services provided or produced by WuXi and other named biotechnology companies of concern under a contract or agreement entered before the effective date of the legislation; and (ii) for a period of five years after the identification of new biotechnology companies of concern, with respect to biotechnology equipment and services provided or produced by an entity that the government identifies in the future as a biotechnology company of concern. We currently rely on certain foreign or foreign-owned third-party vendors, including WuXi and its affiliates, to manufacture certain materials used in clinical trials of our product candidates or to provide services in connection with certain clinical trials or certain discovery activities. Our engagement with these foreign and foreign-owned vendors may be subject to new U.S. legislation or investigations, such as the proposed BIOSECURE Act, sanctions, trade restrictions and other foreign regulatory requirements, which could cause us to need to identify alternate service providers, increase the cost or reduce the supply of materials available to us, delay the procurement or supply of these materials, delay or impact clinical trials, or have an adverse effect on our ability to secure significant commitments from governments to purchase our potential therapies, any of which could adversely affect our financial condition and business prospects. We continue to assess the legislation as it develops to determine the effect, if any, on our contractual relationships.

Our current and anticipated future dependence upon others for the manufacture of our product candidates or products may adversely affect our future profit margins and our ability to commercialize any products that receive regulatory approval on a timely and competitive basis.

The third parties upon whom we rely for the supply of the active pharmaceutical ingredients used in our product candidates are our sole sources of supply, and the loss of any of these suppliers could significantly harm our business.

The active pharmaceutical ingredients, or API, used in certain of our product candidates are supplied to us from single-source suppliers. Our ability to successfully develop our product candidates, and to ultimately supply our commercial products in quantities sufficient to meet the market demand, depends in part on our ability to obtain the API for these products in accordance with regulatory requirements and in sufficient quantities for clinical testing and commercialization. We do not currently have arrangements in place for a redundant or second-source supply of any such API in the event any of our current suppliers of such API cease their operations for any reason. We are also unable to predict how changing global economic conditions or potential global health concerns or crises will affect our third-party suppliers and manufacturers. Any negative impact of such matters on our third-party suppliers and manufacturers may also have an adverse impact on our results of operations or financial condition.

For all of our product candidates, we intend to identify and qualify additional manufacturers to provide such API prior to submission of an NDA to the FDA and/or an MAA to the EMA. We are not certain, however, that our single-source suppliers will be able to meet our demand for their products, either because of the nature of our agreements with those suppliers, our limited experience with those suppliers or our relative importance as a customer to those suppliers. It may be difficult for us to assess our

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ability to timely meet our demand in the future based on past performance. While our suppliers have generally met our demand for their products on a timely basis in the past, they may subordinate our needs in the future to their other customers.

Establishing additional or replacement suppliers for the API used in our product candidates, if required, may not be accomplished quickly. If we are able to find a replacement supplier, such replacement supplier would need to be qualified and may require additional regulatory inspection or approval, which could result in further delay. While we seek to maintain adequate inventory of the API used in our product candidates, any interruption or delay in the supply of components or materials, or our inability to obtain such API from alternate sources at acceptable prices in a timely manner could impede, delay, limit or prevent our development efforts, which could harm our business, results of operations, financial condition and prospects.

The manufacture of biologics is complex and our third-party manufacturers may encounter difficulties in production. If any of our third-party manufacturers encounter such difficulties, our ability to provide supply of product candidates for clinical trials or products for patients, if approved, could be delayed or prevented.

DISC-0974, DISC-0998, and DISC-3405 are monoclonal antibodies. Manufacturing biologics, like monoclonal antibodies, especially in large quantities, is often complex and may require the use of innovative technologies to handle living cells. Each lot of an approved biologic must undergo thorough testing for identity, strength, quality, purity and potency. Manufacturing biologics requires facilities specifically designed for and validated for this purpose, and sophisticated quality assurance and quality control procedures are necessary. Slight deviations anywhere in the manufacturing process, including filling, labeling, packaging, storage and shipping and quality control and testing, may result in lot failures, product recalls or spoilage. When changes are made to the manufacturing process, we may be required to provide preclinical and clinical data showing the comparable identity, strength, quality, purity or potency of the products before and after such changes. If microbial, viral or other contaminations are discovered at the facilities of our manufacturers, such facilities may need to be closed for an extended period of time to investigate and remedy the contamination, which could delay clinical trials and adversely harm our business.

In addition, there are risks associated with large scale manufacturing for clinical trials or commercial scale including, among others, cost overruns, potential problems with process scale-up, process reproducibility, stability issues, compliance with good manufacturing practices, lot consistency and timely availability of raw materials. Even if we obtain regulatory approval for any of our current product candidates or any future product candidates, there is no assurance that our manufacturers will be able to manufacture the approved product to specifications acceptable to the FDA or other comparable foreign regulatory authorities, to produce it in sufficient quantities to meet the requirements for the potential commercial launch of the product or to meet potential future demand. If our manufacturers are unable to produce sufficient quantities for clinical trials or for commercialization, our development and commercialization efforts would be impaired, which would have an adverse effect on our business, financial condition, results of operations and growth prospects.

Risks Related to Our Intellectual Property

If we are unable to obtain and maintain patent and other intellectual property protection for our technology and product candidates, or if the scope of the intellectual property protection obtained is not sufficiently broad, our competitors could develop and commercialize technology and drugs similar or identical to ours, and our ability to successfully commercialize our technology and drugs may be impaired, and we may not be able to compete effectively in our market.

Our commercial success depends in part on our ability to obtain and maintain proprietary or intellectual property protection in the U.S. and other countries for our current or future product candidates, including our current lead product candidates, bitopertin, DISC-0974 and DISC-3405, and our other current or future programs, including DISC-0998, as well as for their respective compositions, formulations, methods used to manufacture them and methods of treatment, in addition to successfully defending these patents against third-party challenges. We seek to protect our proprietary and intellectual property position by, among other methods, filing patent applications in the U.S. and abroad related to our proprietary technology, inventions, and improvements that are important to the development and implementation of our business. Our ability to stop unauthorized third parties from making, using, selling, offering to sell, or importing our product candidates is dependent upon the extent to which we have rights under valid and enforceable patents or trade secrets that cover these activities. We also rely on trade secrets, know-how and continuing technological innovation to develop and maintain our proprietary and intellectual property position.

We have in-licensed, and may in the future in-license, a portion of our intellectual property, and, if we fail to comply with our obligations under these license arrangements, we could lose such intellectual property rights or owe damages to the licensor of such intellectual property. In particular, we have exclusively licensed intellectual property rights from Roche to develop and commercialize bitopertin, including certain back-up compounds and derivatives, for all prophylactic and therapeutic uses. The Roche license covers know-how, and certain specified Roche patent rights, including a composition of matter patent for bitopertin that expires in 2025. We also have exclusively licensed intellectual property rights from AbbVie Deutschland GmbH & Co. KG, or AbbVie, to develop and commercialize DISC-0974 and DISC-0998. The AbbVie license covers know-how, and certain specified AbbVie patent rights, including composition of matter and methods of use patents and patent applications for DISC-0974 and DISC-0998. We also have exclusively licensed intellectual property rights from Mabwell to develop and commercialize antibody products containing Mabwell’s MWTX-001, MWTX-002, and MWTX-003 antibodies. The Mabwell license covers know-how and certain

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specified Mabwell patent rights, including composition of matter and methods of use patents and patent applications for MWTX-001, MWTX-002 and MWTX-003.

The patent position of biotechnology and pharmaceutical companies generally is highly uncertain, involves complex legal and factual questions and has in recent years been the subject of much litigation. The degree of patent protection we require to successfully commercialize our current or future product candidates may be unavailable or severely limited in some cases and may not adequately protect our rights or permit us to gain or keep any competitive advantage. We cannot provide any assurances that any of our patents have, or that any of our pending patent applications that mature into issued patents will include, claims with a scope sufficient to protect bitopertin, DISC-0974, DISC-3405 or our other current or future product candidates. In addition, if the breadth or strength of protection provided by our patent applications or any patents we may own or in-license is threatened, we could dissuade companies from collaborating with us to license, develop or commercialize current or future product candidates.

In addition, the laws of foreign countries may not protect our rights to the same extent as the laws of the U.S. For example, in jurisdictions outside the U.S., a license may not be enforceable unless all the owners of the intellectual property agree or consent to the license. Accordingly, any actual or purported co-owner of our patent rights could seek monetary or equitable relief requiring us to pay it compensation for, or refrain from, exploiting these patents due to such co-ownership. Furthermore, patents have a limited lifespan. In the U.S., and most other jurisdictions in which we have undertaken patent filings, the natural expiration of a patent is generally twenty years after it is filed, assuming all maintenance fees are paid. Various extensions may be available, on a jurisdiction-by-jurisdiction basis; however, the life of a patent, and thus the protection it affords, is limited. Additionally, our product candidates may or may not be eligible for such extensions or we may not be able to obtain such protections due to procedural or other reasons. Given the amount of time required for the development, testing and regulatory review of new product candidates, patents protecting such candidates might expire before or shortly after such candidates are commercialized. As a result, patents we may own or in-license may not provide us with adequate and continuing patent protection sufficient to exclude others from commercializing drugs similar or identical to our current or future product candidates, including generic versions of such drugs.

Other parties have developed technologies that may be related or competitive to our own, and such parties may have filed or may file patent applications, or may have received or may receive patents, claiming inventions that may overlap or conflict with those claimed in our own patent applications or issued patents, with respect to either the same compounds, methods, formulations or other subject matter, in either case that we may rely upon to dominate our patent position in the market. Publications of discoveries in the scientific literature often lag behind the actual discoveries, and patent applications in the U.S. and other jurisdictions are typically not published until at least 18 months after the earliest priority date of the patent filing, or, in some cases, not at all. Therefore, we cannot know with certainty whether we were the first to make the inventions claimed in patents we may own or in-license patents or pending patent applications, or that we were the first to file for patent protection of such inventions. As a result, the issuance, scope, validity, enforceability and commercial value of our patent rights cannot be predicted with any certainty.

In addition, the patent prosecution process is expensive and time-consuming, and we may not be able to file and prosecute all necessary or desirable patent applications at a reasonable cost or in a timely manner. Further, with respect to certain pending patent applications covering our current or future product candidates, prosecution has yet to commence. Patent prosecution is a lengthy process, during which the scope of the claims initially submitted for examination by the relevant patent office(s) may be significantly narrowed by the time they issue, if they ever do. It is also possible that we will fail to identify patentable aspects of our research and development output before it is too late to obtain patent protection. Prosecution could require that claim scope narrow such that a clinical or product candidate or program is not adequately protected by the patent. Moreover, in some circumstances, we may not have the right to control the preparation, filing and prosecution of patent applications, or to maintain the patents, covering technology that we license from or to third parties. Therefore, these patents and applications may not be prosecuted and enforced in a manner consistent with the best interests of our business.

Even if we acquire patent protection that we expect should enable us to establish and/or maintain a competitive advantage, third parties may challenge the validity, enforceability or scope thereof, which may result in such patents being narrowed, invalidated or held unenforceable. The issuance of a patent is not conclusive as to its inventorship, scope, validity or enforceability, and our patents may be challenged in the courts or patent offices in the U.S. and abroad. We may become involved in post-grant proceedings such as opposition, derivation, reexamination, inter partes review, post-grant review, invalidation, or interference proceedings challenging our patent rights or the patent rights of others from whom we may in the future obtain licenses to such rights, in the U.S. Patent and Trademark Office, or USPTO, the European Patent Office, or EPO, or in other countries. In addition, we may be subject to a third-party submission to the USPTO, the EPO, or elsewhere, that may reduce the scope or preclude the granting of claims from our pending patent applications. Competitors may allege that they invented the inventions claimed in our issued patents or patent applications prior to us, or may file patent applications before we do. Competitors may also claim that we are infringing their patents and that we therefore cannot practice our technology as claimed under our patents or patent applications. Competitors may also contest our patents by claiming to an administrative patent authority or judge that the invention was not patent-eligible, was not original, was not novel, was obvious, and/or lacked inventive step, and/or that the patent application filing failed to meet relevant requirements relating to description, basis, enablement, clarity, and/or support; in litigation, a competitor could claim that our patents, if issued, are not valid or are unenforceable for a number of reasons. If a court or administrative patent authority agrees, we would lose our protection of those challenged patents.

In addition, we may in the future be subject to claims by our former employees or consultants asserting an ownership right in our patents or patent applications, as a result of the work they performed on our behalf. Although we generally require all of our

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employees, consultants and advisors and any other third parties who have access to our proprietary know-how, information or technology to assign or grant similar rights to their inventions to us, we cannot be certain that we have executed such agreements with all parties who may have contributed to our intellectual property, nor can we be certain that our agreements with such parties will be upheld in the face of a potential challenge, or that they will not be breached, for which we may not have an adequate remedy.

An adverse determination in any such submission or proceeding may result in loss of exclusivity or freedom to operate or in patent claims being narrowed, invalidated or held unenforceable, in whole or in part, which could limit our ability to stop others from using or commercializing similar or identical technology and drugs, without payment to it, or could limit the duration of the patent protection covering our technology and current or future product candidates. Such challenges may also result in our inability to manufacture or commercialize our current or future product candidates without infringing third-party patent rights. In addition, if the breadth or strength of protection provided by our patents and patent applications is threatened, it could dissuade companies from collaborating with us to license, develop or commercialize current or future product candidates.

Even if they are unchallenged, our issued patents and our pending patent applications, if issued, may not provide us with any meaningful protection or prevent competitors from designing around our patent claims to circumvent patents we may own or in-license by developing similar or alternative technologies or products in a non-infringing manner. For example, a third-party may develop a competitive product that provides benefits similar to one or more of our current or future product candidates but that has a different composition that falls outside the scope of our patent protection. If the patent protection provided by the patents and patent applications we hold or pursue with respect to our current or future product candidates is not sufficiently broad to impede such competition, our ability to successfully commercialize our current or future product candidates could be negatively affected, which would harm our business.

Furthermore, even if we are able to issue patents with claims of valuable scope in one or more jurisdictions, we may not be able to secure such claims in all relevant jurisdictions, or in a sufficient number to meaningfully reduce competition. Our competitors may be able to develop and commercialize their products, including products identical to ours, in any jurisdiction in which we are unable to obtain, maintain or enforce such patent claims. Furthermore, generic manufacturers may develop, seek approval for and launch generic versions of our products, and may challenge the scope, validity or enforceability of our patents, requiring us to engage in complex, lengthy and costly litigation or other proceedings.

We also intend to rely on regulatory exclusivity for protection of our product candidates, if approved for commercial sale. Implementation and enforcement of regulatory exclusivity, which may consist of regulatory data protection and market protection, varies widely from country to country. Failure to qualify for regulatory exclusivity or failure to obtain or to maintain the extent or duration of such protections that we expect for our product candidates, if approved, could affect our decision on whether to market the products in a particular country or countries or could otherwise have an adverse impact on our revenue or results of operations.

Obtaining and maintaining our patent protection depends on compliance with various procedural, document submission, deadlines, fee payment and other requirements imposed by governmental patent agencies, and our patent protection could be reduced or eliminated if we fail to comply with these requirements. We may miss a filing deadline for patent protection on these inventions.

The USPTO and foreign governmental patent agencies require compliance with a number of procedural, documentary, fee payment and other similar provisions during the patent application process and after issuance of any patent. In addition, periodic maintenance fees, renewal fees, annuity fees and/or various other government fees are required to be paid periodically. While an inadvertent lapse can, in some cases, be cured by payment of a late fee, or by other means in accordance with the applicable rules, there are situations in which noncompliance can result in abandonment or lapse of the patent or patent application, resulting in partial or complete loss of patent rights in the relevant jurisdiction. Noncompliance events that could result in abandonment or lapse of a patent include, but are not limited to, failure to respond to official actions within prescribed time limits, non-payment of fees and failure to properly legalize and submit formal documents. In such an event, our competitors might be able to enter the market with similar or identical products or platforms, which could have a material adverse effect on our business prospects and financial condition.

If our trademarks and trade names for our products or company name are not adequately protected in one or more countries where we intend to market our products, we may delay the launch of product brand names, use different trademarks or tradenames in different countries, or face other potentially adverse consequences to building our product brand recognition.

Our trademarks or trade names may be challenged, infringed, diluted, circumvented or declared generic or determined to be infringing on other marks. We intend to rely on both registration and common law protection for our trademarks. We may not be able to protect our rights to these trademarks and trade names or may be forced to stop using these names, which we need for name recognition by potential partners or customers in our markets of interest. During the trademark registration process, we may receive Office Actions from the USPTO or from comparable agencies in foreign jurisdictions objecting to the registration of our trademark. Although we would be given an opportunity to respond to those objections, we may be unable to overcome such rejections. In addition, in the USPTO and in comparable agencies in many foreign jurisdictions, third parties are given an opportunity to oppose pending trademark applications and/or to seek the cancellation of registered trademarks. Opposition or cancellation proceedings may be filed against our trademark applications or registrations, and our trademark applications or registrations may not survive

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such proceedings. If we are unable to obtain a registered trademark or establish name recognition based on our trademarks and trade names, we may not be able to compete effectively and our business may be adversely affected.

If we are unable to adequately protect and enforce our trade secrets, our business and competitive position would be harmed.

In addition to the protection afforded by patents we may own or in-license, we seek to rely on trade secret protection, confidentiality agreements, and license agreements to protect proprietary know-how that may not be patentable, processes for which patents are difficult to enforce and any other elements of our product discovery and development processes that involve proprietary know-how, information or technology that may not be covered by patents. Although we require all of our employees, consultants, advisors and any third parties who have access to our proprietary know-how, information, or technology to enter into confidentiality agreements, trade secrets can be difficult to protect and we have limited control over the protection of trade secrets used by our collaborators and suppliers. We cannot be certain that we have or will obtain these agreements in all circumstances and we cannot guarantee that we have entered into such agreements with each party that may have or have had access to our trade secrets or proprietary information.

Moreover, any of these parties might breach the agreements and intentionally or inadvertently disclose our trade secret information and we may not be able to obtain adequate remedies for such breaches. In addition, competitors may otherwise gain access to our trade secrets or independently develop substantially equivalent information and techniques. Furthermore, the laws of some foreign countries do not protect proprietary rights and trade secrets to the same extent or in the same manner as the laws of the U.S. As a result, we may encounter significant problems in protecting and defending our intellectual property both in the U.S. and abroad. If we are unable to prevent unauthorized material disclosure of our intellectual property to third parties, we will not be able to establish or maintain a competitive advantage in our market, which could materially adversely affect our business, financial condition, results of operations and future prospects.

Enforcing a claim that a party illegally disclosed or misappropriated a trade secret is difficult, expensive and time-consuming, and the outcome is unpredictable. If we choose to go to court to stop a third party from using any of our trade secrets, we may incur substantial costs. These lawsuits may consume our time and other resources even if we are successful. Although we take steps to protect our proprietary information and trade secrets, including through contractual means with our employees and consultants, third parties may independently develop substantially equivalent proprietary information and techniques or otherwise gain access to our trade secrets or disclose our technology. If any of our trade secrets were to be lawfully obtained or independently developed by a competitor or other third party, we would have no right to prevent them from using that technology or information to compete with us.

Thus, we may not be able to meaningfully protect our trade secrets. It is our policy to require our employees, consultants, outside scientific collaborators, sponsored researchers and other advisors to execute confidentiality agreements upon the commencement of employment or consulting relationships with us. These agreements provide that all confidential information concerning our business or financial affairs developed or made known to the individual or entity during the course of the party’s relationship with us is to be kept confidential and not disclosed to third parties except in specific circumstances. In addition, we take other appropriate precautions, such as physical and technological security measures, to guard against misappropriation of our proprietary technology by third parties. In the case of employees, the agreements provide that all inventions conceived by the individual, and which are related to our current or planned business or research and development or made during normal working hours, on our premises or using our equipment or proprietary information, are our exclusive property. Although we require all of our employees to assign their inventions to us, we may be unsuccessful in executing such an agreement with each party who, in fact, conceives or develops intellectual property that we regard as our own. The assignment of intellectual property rights may not be self-executing, or the assignment agreements may be ineffective or breached, and we may be forced to bring claims against third parties, or defend claims that they may bring against us, to determine the ownership of what we regard as our intellectual property. Such claims could have a material adverse effect on our business, financial condition, results of operations, and prospects.

We may initiate, become a defendant in or otherwise become party to lawsuits to protect or enforce our intellectual property rights, which could be expensive, time-consuming, and unsuccessful.

Competitors may infringe any patents we may own or in-license. In addition, any patents we may own or in-license also may become involved in inventorship, priority, validity or unenforceability disputes. To counter infringement or unauthorized use, we may be required to file infringement claims, which can be expensive and time-consuming. We may not prevail in any lawsuits that we initiate, and the damages or other remedies awarded, if any, may not be commercially meaningful. In addition, in an infringement proceeding, a court may decide that one or more of any patents we may own or in-license is not valid or is unenforceable or that the other party’s use of our technology that may be patented falls under the safe harbor to patent infringement under 35 U.S.C. § 271(e)(1). There is also the risk that, even if the validity of these patents is upheld, the court may refuse to stop the other party from using the technology at issue on the grounds that any patents we may own or in-license do not cover the technology in question or that such third-party’s activities do not infringe our patent applications or any patents we may own or in-license. An adverse result in any litigation or defense proceedings could put one or more of any patents we may own or in-license at risk of being invalidated, held unenforceable, or interpreted narrowly and could put our patent applications at risk of not issuing. Such litigation or proceedings

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could substantially increase our operating losses and reduce the resources available for development activities or any future sales, marketing, patient support or distribution activities. We may not have sufficient financial or other resources to conduct such litigation or proceedings adequately. Some of our competitors may be able to sustain the costs of such litigation or proceedings more effectively than we can because of its greater financial resources and more mature and developed intellectual property portfolios. Uncertainties resulting from the initiation and continuation of patent litigation or other proceedings could have a material adverse effect on our ability to compete in the marketplace.

Post-grant proceedings provoked by third parties or brought by or before the USPTO or other patent granting authority may be necessary to determine the validity or priority of inventions with respect to our patent applications or any patents we may own or in-license. These proceedings are expensive and an unfavorable outcome could result in a loss of our current patent rights and could require us to cease using the related technology or to attempt to license rights to us from the prevailing party. Our business could be harmed if the prevailing party does not offer us a license on commercially reasonable terms. In addition to potential USPTO post-grant proceedings, we may become a party to patent opposition proceedings in the EPO, or similar proceedings in other foreign patent offices or courts where our patents may be challenged. The costs of these proceedings could be substantial, and may result in a loss of scope of some claims or a loss of the entire patent. An unfavorable result in a post-grant challenge proceeding may result in the loss of our right to exclude others from practicing one or more of our inventions in the relevant country or jurisdiction, which could have a material adverse effect on our business. Litigation or post-grant proceedings within patent offices may result in a decision adverse to our interests and, even if we are successful, may result in substantial costs and distract our management and other employees. We may not be able to prevent, misappropriation of our trade secrets or confidential information, particularly in countries where the laws may not protect those rights as fully as in the U.S.

Furthermore, because of the substantial amount of discovery required in connection with intellectual property litigation, there is a risk that some of our confidential information could be compromised by disclosure during this type of litigation. In addition, there could be public announcements of the results of hearings, motions or other interim proceedings or developments. If securities analysts or investors perceive these results to be negative, it could have a substantial adverse effect on the price of our common stock.

We may not be able to detect infringement against any patents we may own or in-license. Even if we detect infringement by a third party of any patents we may own or in-license, we may choose not to pursue litigation against or settlement with the third party. If we later sue such third-party for patent infringement, the third-party may have certain legal defenses available to it, which otherwise would not be available except for the delay between when the infringement was first detected and when the suit was brought. Such legal defenses may make it impossible for us to enforce any patents we may own or in-license against such third party.

Intellectual property litigation and administrative patent office patent validity challenges in one or more countries could cause us to spend substantial resources and distract our personnel from their normal responsibilities.

Even if resolved in our favor, litigation or other legal proceedings relating to intellectual property claims may cause us to incur significant expenses and could distract our technical and management personnel from their normal responsibilities. In addition, there could be public announcements of the results of hearings, motions or other interim proceedings or developments and if securities analysts or investors perceive these results to be negative, it could have a substantial adverse effect on the price of our common stock. Such litigation or proceedings could substantially increase our operating losses and reduce the resources available for development activities or any future sales, marketing, patient support or distribution activities. We may not have sufficient financial or other resources to conduct such litigation or proceedings adequately. As noted above, some of our competitors may be able to sustain the costs of such litigation or proceedings more effectively than we can because of their greater financial resources. Uncertainties resulting from the initiation and continuation of patent litigation or other proceedings could compromise our ability to compete in the marketplace, including compromising our ability to raise the funds necessary to continue our clinical trials, continue our research programs, license necessary technology from third parties, or enter into development collaborations that would help us commercialize our current or future product candidates, if approved. Any of the foregoing events would harm our business, financial condition, results of operations and prospects.

We may be subject to damages or settlement costs resulting from claims that we or our employees have violated the intellectual property rights of third parties, or are in breach of our agreements. We may be accused of, allege or otherwise become party to lawsuits or disputes alleging wrongful disclosure of third-party confidential information by us or by another party, including current or former employees, contractors or consultants. In addition to diverting attention and resources to such disputes, such disputes could adversely impact our business reputation and/or protection of our proprietary technology.

The intellectual property landscape relevant to our product candidates and programs is crowded, and third parties may initiate legal proceedings alleging that we are infringing, misappropriating or otherwise violating their intellectual property rights, the outcome of which would be uncertain and could have a material adverse effect on the success of our business. Our commercial success depends upon our ability to develop, manufacture, market and sell our current and future product candidates and use our proprietary technologies without infringing, misappropriating or otherwise violating the intellectual property rights of third parties.

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There is a substantial amount of litigation involving patents and other intellectual property rights in the biotechnology and pharmaceutical industries, as well as administrative proceedings for challenging patents, including derivation, interference, reexamination, inter partes review and post grant review proceedings before the USPTO or oppositions and other comparable proceedings in foreign jurisdictions. We or any of our current or future licensors or strategic partners may be party to, exposed to, or threatened with, future adversarial proceedings or litigation by third parties having patent or other intellectual property rights alleging that our current or future product candidates and/or proprietary technologies infringe, misappropriate or otherwise violate their intellectual property rights. We cannot assure you that our current or future product candidates and other technologies that we have developed, are developing or may develop in the future do not or will not infringe, misappropriate or otherwise violate existing or future patents or other valid intellectual property rights owned by third parties. For example, many of our employees were previously employed at other biotechnology or pharmaceutical companies. Although we try to ensure that our employees, consultants and advisors do not use the proprietary information or know-how of others in their work for us, we may be subject to claims that we or these individuals have used or disclosed intellectual property, including trade secrets or other proprietary information, of any such individual’s former employer. We may also be subject to claims that patents and applications we have filed to protect inventions of our employees, consultants and advisors, even those related to one or more of our current or future product candidates, are rightfully owned by their former or concurrent employer. Litigation may be necessary to defend against these claims.

While certain activities related to development and clinical testing of our current or future product candidates may be subject to safe harbor of patent infringement, such as under 35 U.S.C. §271(e)(1), upon receiving regulatory approval for such candidates we or any of our current or future licensors or strategic partners may immediately become party to, exposed to or threatened with, future adversarial proceedings or litigation by third parties having patent or other intellectual property rights alleging that such product candidates infringe, misappropriate or otherwise violate their intellectual property rights. Numerous U.S. and foreign issued patents and pending patent applications, which are owned by third parties, exist in the fields in which we are developing our current or future product candidates. As the biotechnology and pharmaceutical industries expand and more patents are issued, the risk increases that our current or future product candidates may give rise to claims of infringement of the patent rights of others. Moreover, it is not always clear to industry participants, including us, which patents cover various types of drugs, products or their methods of use or manufacture. Thus, because of the large number of patents issued and patent applications filed in our fields, there may be a risk that third parties may allege they have patent rights encompassing our current or future product candidates, technologies or methods.

If a third party claims that we infringe, misappropriate or otherwise violate its intellectual property rights, we may face a number of issues, including, but not limited to:

•infringement, misappropriation and other intellectual property claims which, regardless of merit, may be expensive and time-consuming to litigate and may divert our management’s attention from our core business and may impact our reputation;

•substantial damages for infringement, misappropriation or other violations, which we may have to pay if a court decides that the product candidate or technology at issue infringes, misappropriates or violates the third party’s rights, and, if the court finds that the infringement was willful, we could be ordered to pay treble damages and the patent owner’s attorneys’ fees;

•a court prohibiting us from developing, manufacturing, marketing or selling our current product candidates, including bitopertin, DISC-0974 and DISC-3405, or future product candidates, or from using our proprietary technologies, unless the third-party licenses its product rights to us, which we are not required to do, on commercially reasonable terms or at all;

•if a license is available from a third party, we may have to pay substantial royalties, upfront fees and other amounts, and/or grant cross-licenses to intellectual property rights for our products, or the license to us may be non-exclusive, which would permit third parties to use the same intellectual property to compete with us;

•redesigning our current or future product candidates or processes so they do not infringe, misappropriate or violate third-party intellectual property rights, which may not be possible or may require substantial monetary expenditures and time; and

•there could be public announcements of the results of hearings, motions or other interim proceedings or developments, and, if securities analysts or investors perceive these results to be negative, it could have a substantial adverse effect on the price of our common stock.

Some of our competitors may be able to sustain the costs of complex patent litigation more effectively than we can because they have substantially greater resources. In addition, any uncertainties resulting from the initiation and continuation of any litigation could have a material adverse effect on our ability to raise the funds necessary to continue our operations or could otherwise have a material adverse effect on our business, results of operations, financial condition and prospects. The occurrence of any of the foregoing could have a material adverse effect on our business, financial condition, results of operations or prospects.

We may choose to challenge the patentability of claims in a third party’s U.S. patent by requesting that the USPTO review the patent claims in an ex-parte re-exam, inter partes review or post-grant review proceedings. These proceedings are expensive and

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may consume our time or other resources. We may choose to challenge a third party’s patent in patent opposition proceedings in the EPO, or other foreign patent office. The costs of these opposition proceedings could be substantial, and may consume our time or other resources. If we fail to obtain a favorable result at the USPTO, EPO or other patent office then we may be exposed to litigation by a third party alleging that the patent may be infringed by our current or future product candidates or proprietary technologies.

Third parties may assert that we are employing their proprietary technology without authorization. Patents issued in the U.S. by law enjoy a presumption of validity that can be rebutted in U.S. courts only with evidence that is “clear and convincing,” a heightened standard of proof. There may be issued third-party patents of which we are currently unaware with claims to compositions, formulations, methods of manufacture or methods for treatment related to the use or manufacture of our current or future product candidates. Patent applications can take many years to issue. In addition, because some patent applications in the U.S. may be maintained in secrecy until the patents are issued, patent applications in the U.S. and many foreign jurisdictions are typically not published until 18 months after their earliest priority filing date, and publications in the scientific literature often lag behind actual discoveries, we cannot be certain that others have not filed patent applications covering our current or future product candidates or technology. If any such patent applications issue as patents, and if such patents have priority over our patent applications or patents we may own or in-license, we may be required to obtain rights to such patents owned by third parties which may not be available on commercially reasonable terms or at all, or may only be available on a non-exclusive basis. There may be currently pending third-party patent applications which may later result in issued patents that our current or future product candidates may infringe. It is also possible that patents owned by third parties of which we are aware, but which we do not believe are relevant to our current or future product candidates or other technologies, could be found to be infringed by our current or future product candidates or other technologies. In addition, third parties may obtain patents in the future and claim that use of our technologies infringes upon these patents. Moreover, we may fail to identify relevant patents or incorrectly conclude that a patent is invalid, not enforceable, exhausted or not infringed by our activities. If any third-party patents were held by a court of competent jurisdiction to cover the manufacturing process of our current or future product candidates, molecules used in or formed during the manufacturing process, or any final product itself, the holders of any such patents may be able to block our ability to commercialize the product candidate unless we obtained a license under the applicable patents, or until such patents expire or they are finally determined to be held invalid or unenforceable. Similarly, if any third-party patent were held by a court of competent jurisdiction to cover aspects of our formulations, processes for manufacture or methods of use, including patient selection methods, the holders of any such patent may be able to block our ability to develop and commercialize the product candidate unless we obtained a license or until such patent expires or is finally determined to be held invalid or unenforceable. In either case, such a license may not be available on commercially reasonable terms or at all. If we are unable to obtain a necessary license to a third-party patent on commercially reasonable terms, or at all, our ability to commercialize our current or future product candidates may be impaired or delayed, which could in turn significantly harm our business. Even if we obtain a license, it may be nonexclusive, thereby giving our competitors access to the same technologies licensed to us.

Parties making claims against us may seek and obtain injunctive or other equitable relief, which could effectively block our ability to further develop and commercialize our current or future product candidates. Defense of these claims, regardless of their merit, could involve substantial litigation expense and would be a substantial diversion of employee resources from our business. In the event of a successful claim of infringement, misappropriation or other violation against us, we may have to pay substantial damages, including treble damages and attorneys’ fees for willful infringement, obtain one or more licenses from third parties, pay royalties or redesign our infringing products, which may be impossible or require substantial time and monetary expenditure. We cannot predict whether any such license would be available at all or whether it would be available on commercially reasonable terms. Furthermore, even in the absence of litigation, we may need or may choose to obtain licenses from third parties to advance our research or allow commercialization of our current or future product candidates. We may fail to obtain any of these licenses at a reasonable cost or on reasonable terms, if at all. In that event, we would be unable to further develop and commercialize our current or future product candidates, which could harm our business significantly.

We may be unable to obtain patent or other intellectual property protection for our current or future product candidates or our future products, if any, in all jurisdictions throughout the world, and we may not be able to adequately enforce our intellectual property rights even in the jurisdictions where we seek protection.

We may not be able to pursue patent coverage of our current or future product candidates in all countries. Filing, prosecuting and defending patents on current or future product candidates in all countries throughout the world would be prohibitively expensive, and intellectual property rights in some countries outside the U.S. can be less extensive than those in the U.S. In addition, the laws of some foreign countries do not protect intellectual property rights to the same extent as federal and state laws in the U.S. Consequently, we may not be able to prevent third parties from practicing our inventions in all countries outside the U.S., or from selling or importing products made using our inventions in and into the U.S. or other jurisdictions. Competitors may use our technologies in jurisdictions where we have not obtained patent protection to develop their own products and further, may export otherwise infringing products to territories where we have patent protection, but where enforcement is not as strong as that in the U.S. These products may compete with our current or future product candidates and in jurisdictions where we do not have any issued patents, our patent applications or other intellectual property rights may not be effective or sufficient to prevent them from

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competing. Much of our patent portfolio is at the very early stage. We will need to decide whether and in which jurisdictions to pursue protection for the various inventions in our portfolio prior to applicable deadlines.

Many companies have encountered significant problems in protecting and defending intellectual property rights in foreign jurisdictions. The legal systems of certain countries, particularly certain developing countries, do not favor the enforcement of patents, trade secrets and other intellectual property protection, particularly those relating to biopharmaceutical products and/or methods of using biopharmaceutical products, which could make it difficult for us to stop the infringement of any patents we may own or in-license or marketing of competing products in violation of our proprietary rights generally. Proceedings to enforce any rights we may have in our patent applications or any patents we may own or in-license in foreign jurisdictions could result in substantial costs and divert our efforts and attention from other aspects of our business, could put any patents we may own or in-license at risk of being invalidated or interpreted narrowly and our patent applications at risk of not issuing and could provoke third parties to assert claims against us. We may not prevail in any lawsuits that we initiate and the damages or other remedies awarded, if any, may not be commercially meaningful. Accordingly, our efforts to enforce our intellectual property rights around the world may be inadequate to obtain a significant commercial advantage from the intellectual property that we develop or license.

Many countries have compulsory licensing laws under which a patent owner may be compelled to grant licenses to third parties. In addition, many countries limit the enforceability of patents against government agencies or government contractors. In these countries, the patent owner may have limited remedies, which could materially diminish the value of such patent. If we are forced to grant a license to third parties with respect to any patents we may own or license that are relevant to our business, our competitive position may be impaired, and our business, financial condition, results of operations, and prospects may be adversely affected.

We may not obtain or grant licenses or sublicenses to intellectual property rights in all markets on equally or sufficiently favorable terms with third parties.

It may be necessary for us to use the patented or proprietary technology of third parties to commercialize our products, in which case we would be required to obtain a license from these third parties. The licensing of third-party intellectual property rights is a competitive area, and more established companies may pursue strategies to license or acquire third-party intellectual property rights that we may consider attractive or necessary. More established companies may have a competitive advantage over us due to their size, capital resources and greater clinical development and commercialization capabilities. In addition, companies that perceive us to be a competitor may be unwilling to assign or license rights to us. We also may be unable to license or acquire third-party intellectual property rights on terms that would allow us to make an appropriate return on our investment or at all. If we are unable to license such technology, or if we are forced to license such technology on unfavorable terms, our business could be materially harmed. If we are unable to obtain a necessary license, we may be unable to develop or commercialize the affected current or future product candidates, which could materially harm our business, and the third parties owning such intellectual property rights could seek either an injunction prohibiting our sales, or, with respect to our sales, an obligation on our part to pay royalties or other forms of compensation. Even if we are able to obtain a license, it may be non-exclusive, thereby giving our competitors access to the same technologies licensed to us. Any of the foregoing could harm our competitive position, business, financial condition, results of operations and prospects.

If we fail to comply with our obligations in any agreements under which we may license intellectual property rights from third parties or otherwise experience disruptions to our business relationships with our licensors, we could lose license rights that are important to our business.

We are party to license agreements with Roche, AbbVie and Mabwell and we may from time to time in the future be party to other license and collaboration agreements with third parties to advance our research or allow commercialization of current or future product candidates. Such agreements may impose numerous obligations, such as development, diligence, payment, commercialization, funding, milestone, royalty, sublicensing, insurance, patent prosecution, enforcement and other obligations on us and may require us to meet development timelines, or to exercise commercially reasonable efforts to develop and commercialize licensed products, in order to maintain the licenses. See “Business-Collaborations and License Agreement” of our Annual Report on Form 10-K for the year ended December 31, 2023 for more information regarding our license agreements with Roche, AbbVie and Mabwell. In spite of our best efforts, our licensors might conclude that we have materially breached our license agreements and might therefore terminate the license agreements, thereby removing or limiting our ability to develop and commercialize products and technologies covered by these license agreements.

Any termination of these licenses, or if the underlying patents fail to provide the intended exclusivity, could result in the loss of significant rights and could harm our ability to commercialize our current or future product candidates, and competitors or other third parties would have the freedom to seek regulatory approval of, and to market, products identical to ours and we may be required to cease our development and commercialization of certain of our current or future product candidates. Any of the foregoing could have a material adverse effect on our competitive position, business, financial conditions, results of operations, and prospects.

Disputes may also arise between us and our licensors regarding intellectual property subject to a license agreement, including:

•the scope of rights granted under the license agreement and other interpretation-related issues;

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•whether and the extent to which our technology and processes infringe, misappropriate or otherwise violate intellectual property rights of the licensor that is not subject to the licensing agreement;

•our right to sublicense patent and other rights to third parties under collaborative development relationships;

•our diligence obligations with respect to the use of the licensed technology in relation to our development and commercialization of our current or future product candidates, and what activities satisfy those diligence obligations;

•the priority of invention of any patented technology; and

•the ownership of inventions and know-how resulting from the joint creation or use of intellectual property by our current or future licensors and us and our partners.

In addition, the agreements under which we may license intellectual property or technology from third parties are likely to be complex, and certain provisions in such agreements may be susceptible to multiple interpretations. The resolution of any contract interpretation disagreement that may arise could narrow what we believe to be the scope of our rights to the relevant intellectual property or technology, or increase what we believe to be our financial or other obligations under the relevant agreement, either of which could have a material adverse effect on our business, financial condition, results of operations and prospects. Moreover, if disputes over intellectual property that we may license prevent or impair our ability to maintain future licensing arrangements on acceptable terms, we may be unable to successfully develop and commercialize the affected current or future product candidates, which could have a material adverse effect on our business, financial conditions, results of operations and prospects.

Any granted patents we may own or in-license covering our current or future product candidates or other valuable technology could be narrowed or found invalid or unenforceable if challenged in court or before administrative bodies in the U.S. or abroad, including the USPTO and the EPO. A patent asserted in a judicial court could be found invalid or unenforceable during the enforcement proceeding. Administrative or judicial proceedings challenging the validity of our patents or individual patent claims could take months or years to resolve.

If we or our licensors or strategic partners initiate legal proceedings against a third party to enforce a patent covering one of our current or future product candidates, the defendant could counterclaim that the patent covering our product candidate, as applicable, is invalid and/or unenforceable. In patent litigation in the U.S., defendant counterclaims alleging invalidity and/or unenforceability are commonplace, and there are numerous grounds upon which a third party can assert invalidity or unenforceability of a patent. Grounds for a validity challenge could be an alleged failure to meet any of several statutory requirements, including lack of patentable subject matter, lack of written description, lack of novelty, obviousness, or non-enablement. Grounds for an unenforceability assertion could be an allegation that someone connected with prosecution of the patent withheld relevant information from the USPTO that was material to patentability, or made a misleading statement, in the process of obtaining the patent during patent prosecution. Third parties may also raise similar claims before administrative bodies in the U.S. or abroad, even outside the context of litigation. Such mechanisms include re-examination, inter partes review, post grant review and equivalent proceedings in foreign jurisdictions (such as opposition proceedings). Such proceedings could result in revocation or amendment to our patent applications or any patents we may own or in-license in such a way that they no longer cover our current or future product candidates. The outcome following legal assertions of invalidity and unenforceability is unpredictable. An adverse determination in any such submission, proceeding or litigation could reduce the scope of, or invalidate or render unenforceable, any rights we may have from our patent applications or any patents we may own or in-license, allow third parties to commercialize our current or future product candidates or other technologies and compete directly with us, without payment to us or result in our inability to manufacture or commercialize products without infringing third-party patent rights. Moreover, we may have to participate in interference proceedings declared by the USPTO to determine priority of invention or in post-grant challenge proceedings, such as oppositions in a foreign patent office, that challenge our or our current or future licensors’ priority of invention or other features of patentability with respect to our patent applications and any patents we may own or in-license. Such challenges may result in loss of patent rights, loss of exclusivity, or in patent claims being narrowed, invalidated, or held unenforceable, which could limit our ability to stop others from using or commercializing similar or identical technology and products, or limit the duration of the patent protection of our current or future product candidates and other technologies. With respect to the validity question, for example, we cannot be certain that there is no invalidating prior art, of which we or our current or future licensing partners and the patent examiner were unaware during prosecution. If a defendant were to prevail on a legal assertion of invalidity and/or unenforceability, or if we are otherwise unable to adequately protect our rights, we would lose at least part, and perhaps all, of the patent protection on our current or future product candidates. Such a loss of patent protection could have a material adverse impact on our business and our ability to commercialize or license our technology and current or future product candidates.

Such proceedings also may result in substantial cost and require significant time from our scientists and management, even if the eventual outcome is favorable to us. If we are unsuccessful in any such proceeding or other priority or inventorship dispute, we may be required to obtain and maintain licenses from third parties, including parties involved in any such interference proceedings or other priority or inventorship disputes. Such licenses may not be available on commercially reasonable terms or at all, or may be non-exclusive. If we are unable to obtain and maintain such licenses, we may need to cease the development, manufacture, and commercialization of one or more of the current or future product candidates we may develop. The loss of exclusivity or the

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narrowing of our patent application claims could limit our ability to stop others from using or commercializing similar or identical technology and products. Any of the foregoing could have a material adverse effect on our business, results of operations, financial condition and prospects.

Changes in patent law could diminish the value of patents in general, thereby impairing our ability to protect our current or future product candidates.

As is the case with other biopharmaceutical companies, our success is heavily dependent on intellectual property, particularly patents. Obtaining and enforcing patents in the biopharmaceutical industry involve both technological and legal complexity and is therefore costly, time consuming and inherently uncertain. Recent patent reform legislation in the U.S. and other countries, including the Leahy-Smith America Invents Act, or Leahy-Smith Act, signed into law on September 16, 2011, could increase those uncertainties and costs. The Leahy-Smith Act includes a number of significant changes to U.S. patent law. These include provisions that affect the way patent applications are prosecuted, redefine prior art and provide more efficient and cost-effective avenues for competitors to challenge the validity of patents. In addition, the Leahy-Smith Act has transformed the U.S. patent system into a “first inventor to file” system. The first-inventor-to-file provisions, however, only became effective on March 16, 2013. Accordingly, it is not yet clear what, if any, impact the Leahy-Smith Act will have on the operation of our business. However, the Leahy-Smith Act and its implementation could make it more difficult to obtain patent protection for our inventions and increase the uncertainties and costs surrounding the prosecution of our patent applications and the enforcement or defense of our issued patents, all of which could harm our business, results of operations and financial condition.

The U.S. Supreme Court has ruled on several patent cases in recent years, either narrowing the scope of patent protection available in certain circumstances or weakening the rights of patent owners in certain situations. Additionally, there have been recent proposals for additional changes to the patent laws of the U.S. and other countries that, if adopted, could impact our ability to obtain patent protection for our proprietary technology or our ability to enforce our proprietary technology. Depending on future actions by the U.S. Congress, the U.S. courts, the USPTO and the relevant law-making bodies in other countries, the laws and regulations governing patents could change in unpredictable ways that would weaken our ability to obtain new patents or to enforce our existing patents and patents that we might obtain in the future.

We may not identify relevant third-party patents or may incorrectly interpret the relevance, scope or expiration of a third-party patent, which might subject us to infringement claims or adversely affect our ability to develop and market our current or future product candidates.

We cannot guarantee that any of our or our licensors’ patent searches or analyses, including the identification of relevant patents, the scope of patent claims or the expiration of relevant patents, are complete or thorough, nor can we be certain that we have identified each and every third-party patent and pending patent application in the U.S. and abroad that is relevant to or necessary for the commercialization of our current or future product candidates in any jurisdiction. For example, U.S. patent applications filed before November 29, 2000 and certain U.S. patent applications filed after that date that will not be filed outside the U.S. remain confidential until patents issue. As mentioned above, patent applications in the U.S. and elsewhere are published approximately 18 months after the earliest filing for which priority is claimed, with such earliest filing date being commonly referred to as the priority date. Therefore, patent applications covering our current or future product candidates could have been filed by third parties without our knowledge. Additionally, pending patent applications that have been published can, subject to certain limitations, be later amended in a manner that could cover our current or future product candidates or the use of our current or future product candidates. The scope of a patent claim is determined by an interpretation of the law, the written disclosure in a patent and the patent’s prosecution history. Our interpretation of the relevance or the scope and/or validity of a patent or a pending application may be incorrect, which may negatively impact our ability to market our current or future product candidates. We may incorrectly determine that our current or future product candidates are not covered by a third-party patent or may incorrectly predict whether a third party’s pending application will issue with claims of relevant scope. Our determination of the expiration date of any patent in the U.S. or abroad that we consider relevant may be incorrect, which may negatively impact our ability to develop and market our current or future product candidates. Our failure to identify and correctly interpret relevant patents may negatively impact our ability to develop and market our current or future product candidates.

If we fail to identify and correctly interpret relevant patents, we may be subject to infringement claims. We cannot guarantee that we will be able to successfully settle or otherwise resolve such infringement claims. If we fail in any such dispute, in addition to being forced to pay damages, which may be significant, we may be temporarily or permanently prohibited from commercializing any of our current or future product candidates that are held to be infringing. We might, if possible, also be forced to redesign current or future product candidates so that we no longer infringes the third-party intellectual property rights. Any of these events, even if we were ultimately to prevail, could require us to divert substantial financial and management resources that we would otherwise be able to devote to our business and could adversely affect our business, financial condition, results of operations and prospects.

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Intellectual property rights do not guarantee commercial success of current or future product candidates or other business activities. Numerous factors may limit any potential competitive advantage provided by our intellectual property rights.

The degree of future protection afforded by our intellectual property rights, whether owned or in-licensed, is uncertain because intellectual property rights have limitations, and may not adequately protect our business, provide a barrier to entry against our competitors or potential competitors, or permit us to maintain our competitive advantage. Moreover, if a third party has intellectual property rights that cover the practice of our technology, we may not be able to fully exercise or extract value from our intellectual property rights. The following examples are illustrative:

•patent applications that we own or may in-license may not lead to issued patents;

•patents, should they issue, that we may own or in-license, may not provide us with any competitive advantages, may be narrowed in scope, or may be challenged and held invalid or unenforceable;

•others may be able to develop and/or practice technology, including compounds that are similar to the chemical compositions of our current or future product candidates, that is similar to our technology or aspects of our technology but that is not covered by the claims of any patents we may own or in-license, should any patents issue;

•third parties may compete with us in jurisdictions where we do not pursue and obtain patent protection;

•we, or our current or future licensors or collaborators, might not have been the first to make the inventions covered by a patent application that we own or may in-license;

•we, or our current or future licensors or collaborators, might not have been the first to file patent applications covering a particular invention;

•others may independently develop similar or alternative technologies without infringing, misappropriating or otherwise violating our intellectual property rights;

•our competitors might conduct research and development activities in the U.S. and other countries that provide a safe harbor from patent infringement claims for certain research and development activities, as well as in countries where we do not have patent rights, and may then use the information learned from such activities to develop competitive products for sale in our major commercial markets;

•we may not be able to obtain and/or maintain necessary licenses on reasonable terms or at all;

•third parties may assert an ownership interest in our intellectual property and, if successful, such disputes may preclude us from exercising exclusive rights, or any rights at all, over that intellectual property;

•we may choose not to file a patent in order to maintain certain trade secrets or know-how, and a third-party may subsequently file a patent covering such trade secrets or know-how;

•we may not be able to maintain the confidentiality of our trade secrets or other proprietary information;

•we may not develop or in-license additional proprietary technologies that are patentable; and

•the patents of others may have an adverse effect on our business.

Should any of these events occur, they could significantly harm our business, financial condition, results of operations and prospects.

Risks Related to Government Regulation

Obtaining and maintaining regulatory approval of our product candidates in one jurisdiction does not mean that we will be successful in obtaining regulatory approval of our product candidates in other jurisdictions.

Obtaining and maintaining regulatory approval of our product candidates in one jurisdiction does not guarantee that we will be able to obtain or maintain regulatory approval in any other jurisdiction, while a failure or delay in obtaining regulatory approval in one jurisdiction may have a negative effect on the regulatory approval process in others. For example, even if the FDA grants regulatory approval of a product candidate, comparable regulatory authorities in foreign jurisdictions must also approve the manufacturing, marketing and promotion of the product candidate in those countries. Approval procedures vary among jurisdictions and can involve requirements and administrative review periods different from, and greater than, those in the United States, including additional preclinical studies or clinical trials as clinical trials conducted in one jurisdiction may not be accepted by regulatory authorities in other jurisdictions. In short, the foreign regulatory approval process involves all of the risks associated with FDA approval. In many jurisdictions outside the United States, a product candidate must be approved for reimbursement before it can be approved for sale in that jurisdiction. In some cases, the price that we may intend to charge for our products will also be subject to approval.

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We may also submit marketing applications in other countries. Regulatory authorities in jurisdictions outside of the United States have requirements for approval of product candidates with which we must comply prior to marketing in those jurisdictions. Obtaining foreign regulatory approvals and compliance with foreign regulatory requirements could result in significant delays, difficulties and costs for us and could delay or prevent the introduction of our products in certain countries. If we fail to comply with the regulatory requirements in international markets and/or receive applicable regulatory approvals, our target market will be reduced and our ability to realize the full market potential of our product candidates will be harmed.

We may seek priority review designation for one or more of our product candidates, but we might not receive such designation, and even if we do, such designation may not lead to a faster regulatory review or approval process.

If the FDA determines that a product candidate offers a treatment for a serious condition and, if approved, the product would provide a significant improvement in safety or effectiveness, the FDA may designate the product candidate for priority review. A priority review designation means that the goal for the FDA to review an application is six months, rather than the standard review period of ten months. We may request priority review for our product candidates. The FDA has broad discretion with respect to whether or not to grant priority review status to a product candidate, so even if we believe a particular product candidate is eligible for such designation or status, the FDA may decide not to grant it. Moreover, a priority review designation does not necessarily result in an expedited regulatory review or approval process or necessarily confer any advantage with respect to approval compared to conventional FDA procedures. Receiving priority review from the FDA does not guarantee approval within the six-month review cycle or at all.

We may seek orphan drug designation for certain of our product candidates, and we may be unsuccessful or may be unable to maintain the benefits associated with orphan drug designation, including the potential for market exclusivity.

We have received orphan drug designation from the FDA for bitopertin for the treatment of EPP and for DISC-3405 for the treatment of PV. As part of our business strategy, we may seek orphan drug designation for certain of our product candidates and indications, as appropriate. Regulatory authorities in some jurisdictions, including the United States and Europe, may designate drugs for relatively small patient populations as orphan drugs. Under the Orphan Drug Act, the FDA may designate a drug or biologic as an orphan drug if it is a product intended to treat a rare disease or condition, which is generally defined as a patient population of fewer than 200,000 individuals annually in the United States, or a patient population of 200,000 or more in the United States where there is no reasonable expectation that the cost of developing the product will be recovered from sales in the United States. In the United States, orphan drug designation entitles a party to financial incentives such as opportunities for grant funding towards clinical trial costs, tax advantages and user-fee waivers.

Similarly, in the European Union, the European Commission, upon the recommendation of the EMA’s Committee for Orphan Medicinal Products, grants orphan designation in respect of products that are intended for the diagnosis, prevention or treatment of life-threatening or chronically debilitating conditions affecting no more than 5 in 10,000 persons in the European Union. Additionally, designation may be granted for products intended for the diagnosis, prevention, or treatment of a life-threatening, seriously debilitating or serious and chronic condition when, without incentives, it is unlikely that sales of the product in the European Union would generate sufficient return to justify the necessary investment in developing the product. In each case, there must be no satisfactory method of diagnosis, prevention, or treatment of the applicable condition which is authorized for marketing in the European Union (or, if such a method exists, the applicable product would be of significant benefit to those affected by the condition). In the European Union, orphan designation entitles a party to financial incentives such as reduction of fees or fee waivers. The European Committee for Orphan Medical Products adopted a positive opinion on Orphan Designation for bitopertin for treatment of EPP.

Generally, if a product with an orphan designation subsequently receives the first regulatory approval for the indication for which it has such designation, the product is entitled to a period of marketing exclusivity, which precludes the FDA or the EMA from approving another marketing application for the same product and indication for that time period, except in limited circumstances. The applicable period is seven years in the United States and ten years in the European Union. The European Union market exclusivity period can be reduced to six years if, at the end of the fifth year, it is determined that a product no longer meets the criteria for orphan designation, including if the product is sufficiently profitable so that market exclusivity is no longer justified.

Even if we obtain orphan drug exclusivity for one of our product candidates, that exclusivity may not effectively protect our product candidate from competition because different products can be approved for the same condition. In addition, a designated orphan drug may not receive orphan drug exclusivity if it is approved for a use that is broader than the indication for which it received orphan designation. Moreover, orphan drug exclusive marketing rights in the United States may be lost if the FDA later determines that the request for designation was materially defective or if the manufacturer is unable to assure sufficient quantity of the product to meet the needs of patients with the rare disease or condition or if another product with the same active moiety is determined to be safer, more effective, or represents a major contribution to patient care. Orphan drug designation neither shortens the development time or regulatory review time of a product nor gives the product any advantage in the regulatory review or approval

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process. While we may seek orphan drug designation for our product candidates, we may never receive such designations. Even if we do receive such designations, there is no guarantee that we will enjoy the benefits of those designations.

The FDA may further reevaluate its regulations and policies under the Orphan Drug Act. We do not know if, when or how the FDA may change its orphan drug regulations and policies in the future, and it is uncertain how any changes might affect our business. Depending on what changes the FDA may make to its orphan drug regulations and policies, our business could be adversely impacted.

We may seek rare pediatric disease designation for bitopertin. However, a marketing application for bitopertin, if approved, may not meet the eligibility criteria for a rare pediatric disease priority review voucher.

We may seek rare pediatric disease designation for bitopertin in patients with EPP and XLP. The FDA defines “rare pediatric disease” as a (i) serious or life-threatening disease in which the serious or life-threatening manifestations primarily affect ages from birth to 18 years, including age groups often called neonates, infants, children and adolescents; and (ii) a rare disease or condition within the meaning of the Orphan Drug Act. Designation of a product candidate as a product for a rare pediatric disease does not guarantee that a marketing application for such product candidate will meet the eligibility criteria for a rare pediatric disease priority review voucher at the time the application is approved. Under the Federal Food, Drug, and Cosmetic Act, we will need to request a rare pediatric disease priority review voucher in our original marketing application for our product candidates for which we have received rare pediatric disease designation. The FDA may determine that a marketing application for bitopertin, if approved, does not meet the eligibility criteria for a priority review voucher.

Under the current statutory sunset provisions, after December 20, 2024, the FDA may only award a priority review voucher for an approved rare pediatric disease product application if the sponsor has rare pediatric disease designation for the drug or biologic that is the subject of such application, and that designation was granted by December 20, 2024. After September 30, 2026, the FDA may not award any rare pediatric disease priority review vouchers. However, it is possible the authority for FDA to award rare pediatric disease priority review vouchers will be further extended by Congress. As such, if we do not obtain approval of a marketing application for bitopertin in patients with EPP and XLP on or before September 30, 2026, and if the priority review voucher program is not extended by Congressional action, we may not receive a priority review voucher.

A breakthrough therapy designation and fast track designation by the FDA, even if granted for any of our product candidates, may not lead to a faster development, regulatory review or approval process, and each designation does not increase the likelihood that any of our product candidates will receive regulatory approval in the United States.

We may seek a breakthrough therapy designation for certain of our product candidates. A breakthrough therapy is defined as a drug or biologic that is intended, alone or in combination with one or more other drugs or biologics, to treat a serious or life-threatening disease or condition and preliminary clinical evidence indicates that the drug or biologic may demonstrate substantial improvement over existing therapies on one or more clinically significant endpoints, such as substantial treatment effects observed early in clinical development. For product candidates that have been designated as breakthrough therapies, interaction and communication between the FDA and the sponsor of the trial can help to identify the most efficient path for clinical development while minimizing the number of patients placed in ineffective control regimens. Products designated as breakthrough therapies by the FDA may also be eligible for priority review and accelerated approval. Designation as a breakthrough therapy is within the discretion of the FDA. Accordingly, even if we believe one of our product candidates meets the criteria for designation as a breakthrough therapy, the FDA may disagree and instead determine not to make such designation. In any event, the receipt of a breakthrough therapy designation for a product candidate may not result in a faster development process, review or approval compared to therapies considered for approval under conventional FDA procedures and does not assure ultimate approval by the FDA. In addition, even if one or more of our product candidates are designated as breakthrough therapies, the FDA may later withdraw the designation if it determines that such product candidates no longer meet the conditions for such designation.

We were granted fast track designation by the FDA for DISC-3405 for the treatment of PV in September 2023 and for DISC-0974 for the treatment of anemia in non-dialysis dependent chronic kidney disease in February 2024, and we may seek fast track designation for certain of our product candidates. If a drug or biologic is intended for the treatment of a serious or life-threatening condition and the drug or biologic demonstrates the potential to address unmet medical needs for this condition, the sponsor may apply for fast track designation. The FDA has broad discretion whether or not to grant this designation, so even if we believe a particular product candidate is eligible for this designation, the FDA may disagree and instead decide not to grant it. Even if we do receive fast track designation, we may not experience a faster development process, review or approval compared to conventional FDA procedures. The FDA may withdraw fast track designation if it believes that the designation no longer meets the conditions for such designation. Fast track designation alone does not guarantee qualification for the FDA’s priority review procedures.

We may seek approval from the FDA for bitopertin or any of our other current or future product candidates through the use of the Accelerated Approval Program. If we are not able to use such program, we may be required to conduct additional clinical trials beyond those that are contemplated, which would increase the expense of obtaining, and delay the receipt of, necessary

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marketing approvals, if we receive them at all. In addition, even if the Accelerated Approval Program is available to us, it may not lead to expedited approval of our product candidates, or approval at all.

We may seek accelerated approval of bitopertin or any of our other current or future product candidates using the FDA’s Accelerated Approval Program. A product may be eligible for accelerated approval if it treats a serious or life-threatening condition and generally provides a meaningful advantage over available therapies. In addition, it must demonstrate an effect on a surrogate endpoint that is reasonably likely to predict clinical benefit or on a clinical endpoint that can be measured earlier than irreversible morbidity or mortality, or IMM, that is reasonably likely to predict an effect on IMM or other clinical benefit. It is possible that at the time of submission of a marketing application, the FDA may determine that our product candidate is not eligible for accelerated approval or that accelerated approval is not warranted. Moreover, FDA may revise how it implements accelerated approval, which could negatively affect the development of our current or future product candidates.

As a condition of approval, the FDA generally requires that a sponsor of a drug or biologic receiving accelerated approval perform adequate and well-controlled post-marketing clinical trials. These confirmatory trials must be completed with due diligence. Under FDORA, the FDA is permitted to require, as appropriate, that a post-approval confirmatory trial or trials be underway prior to approval or within a specified time period after the date accelerated approval is granted. FDORA also requires sponsors to send updates to the FDA every 180 days on the status of such trials, including progress toward enrollment targets, and the FDA must promptly post this information publicly. FDORA also gives the FDA increased authority to withdraw approval of a drug or biologic granted accelerated approval on an expedited basis if the sponsor fails to conduct confirmatory studies in a timely manner, send the necessary updates to the FDA, or if such post-approval trials fail to verify the product’s predicted clinical benefit. Under FDORA, the FDA is empowered to take action, such as issuing fines, against companies that fail to conduct with due diligence any post-approval confirmatory trial or submit timely reports to the agency on their progress. In addition, the FDA currently requires, unless otherwise informed by the agency, pre-approval of promotional materials for products being considered for accelerated approval, which could adversely impact the timing of the commercial launch of the product.

If we are not able to use, and obtain approval through, the Accelerated Approval Program for a product candidate, or if a product is withdrawn after accelerated approval has been granted, we may be required to conduct additional clinical trials beyond those that are contemplated, which would increase the expense of obtaining, and delay the receipt of, full FDA approval, if received at all.

In November 2024, we announced that, based on discussions with the FDA, reduction in protoporphyrin IX, or PPIX, may be sufficient to serve as a surrogate endpoint supportive of submitting an NDA for bitopertin in EPP and XLP under the FDA’s Accelerated Approval Program based on our existing data, subject to further discussion regarding the design of our planned APOLLO clinical trial as a confirmatory trial. The FDA may not agree with us on the design of any such confirmatory trial, in which case we would need to conduct the APOLLO trial as a Phase 3 clinical trial in order to support an NDA submission under the traditional registrational pathway. Even if the FDA agrees with the design of a confirmatory trial, the FDA may not accept any application we make for accelerated approval for bitopertin, may not grant this approval on a timely basis, or may not grant approval at all. Even if we do receive accelerated approval, we may not experience a faster development or regulatory review or approval process, and receiving accelerated approval does not provide assurance of ultimate full FDA approval. Even if the Accelerated Approval Program does result in a faster approval process, there is no guaranty that we will be able to begin commercialization of our product at the time of such approval.

If our drug product candidates or any of our future drug product candidates obtain regulatory approval, additional competitors could enter the market with generic versions of such products, which may result in a material decline in sales of our competing products.

Under the Drug Price Competition and Patent Term Restoration Act of 1984, or the Hatch-Waxman Amendments to the Federal Food, Drug, and Cosmetic Act, or the FDCA, a company may file an abbreviated new drug application, or ANDA, seeking approval of a generic version of an approved innovator product. Under the Hatch-Waxman Amendments, a company may also submit an NDA under section 505(b)(2) of the FDCA that references the FDA’s prior approval of the innovator product or preclinical studies and/or clinical trials that were not conducted by, or for, the applicant and for which the applicant has not obtained a right of reference. A 505(b)(2) NDA product may be for a new or improved version of the original innovator product. The Hatch-Waxman Amendments also provide for certain periods of regulatory exclusivity, which preclude FDA approval (or in some circumstances, FDA filing and review) of an ANDA or 505(b)(2) NDA. In addition to the benefits of regulatory exclusivity, an innovator NDA holder may have patents claiming the active ingredient, product formulation or an approved use of the drug, which would be listed with the product in the FDA publication “Approved Drug Products with Therapeutic Equivalence Evaluations,” known as the Orange Book. If there are patents listed in the Orange Book for the applicable, approved innovator product, a generic or 505(b)(2) applicant that seeks to market our product before expiration of the patents must include in their applications what is known as a “Paragraph IV” certification, challenging the validity or enforceability, or claiming non-infringement, of the listed patent or patents. Notice of

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the certification must be given to the patent owner and NDA holder and if, within 45 days of receiving notice, either the patent owner or NDA holder sues for patent infringement, approval of the ANDA or 505(b)(2) NDA is stayed for up to 30 months.

Accordingly, if any of our product candidates that are regulated as drugs are approved, competitors could file ANDAs for generic versions of these products or 505(b)(2) NDAs that reference our products. If there are patents listed for such drug products in the Orange Book, those ANDAs and 505(b)(2) NDAs would be required to include a certification as to each listed patent indicating whether the ANDA applicant does or does not intend to challenge the patent. We cannot predict which, if any, patents in our current portfolio or patents we may obtain in the future will be eligible for listing in the Orange Book, how any generic competitor would address such patents, whether we would sue on any such patents or the outcome of any such suit.

We may not be successful in securing or maintaining proprietary patent protection for products and technologies we develop or licenses, despite expending a significant amount of resources that could have been focused on other areas of our business. Moreover, if any of our owned or in-licensed patents that are listed in the Orange Book are successfully challenged by way of a Paragraph IV certification and subsequent litigation, the affected product could immediately face generic competition and our sales would likely decline rapidly and materially.

If approved, our investigational products regulated as biologics may face competition from biosimilars or interchangeable products approved through an abbreviated regulatory pathway.

The Biologics Price Competition and Innovation Act of 2009, or BPCIA, created an abbreviated approval pathway for biologic products that are biosimilar to or interchangeable with an FDA-licensed reference biologic product. Under the BPCIA, an application for a biosimilar or interchangeable product may not be submitted to the FDA until four years following the date that the reference product was first licensed by the FDA. In addition, the approval of a biosimilar or interchangeable product may not be made effective by the FDA until 12 years from the date on which the reference product was first licensed. During this 12-year period of exclusivity, another company may still market a competing version of the reference product if the FDA approves a BLA for the competing product containing the sponsor’s own preclinical data and data from adequate and well-controlled clinical trials to demonstrate the safety, purity, and potency of the other company’s product. The law is complex and is still being interpreted and implemented by the FDA. As a result, its ultimate impact, implementation, and meaning are subject to uncertainty.

We believe that any of our product candidates approved as a biologic product under a BLA should qualify for the 12-year period of exclusivity. However, there is a risk that this exclusivity could be shortened due to congressional action or otherwise, or that the FDA will not consider our investigational medicines to be reference products, potentially creating the opportunity for biosimilar competition sooner than anticipated. Other aspects of the BPCIA, some of which may impact the BPCIA exclusivity provisions, have also been the subject of litigation. Moreover, the extent to which a biosimilar or interchangeable product, once licensed, will be substituted for any one of our reference products in a way that is similar to traditional generic substitution for non-biologic products is not yet clear, and will depend on a number of marketplace and regulatory factors that are still developing. If competitors are able to obtain regulatory approval for biosimilars or interchangeable products referencing our products, our products may become subject to competition from such biosimilars or interchangeable products, with the attendant competitive pressure and consequences.

The FDA, the EMA and other regulatory authorities may implement additional regulations or restrictions on the development and commercialization of our product candidates, and such changes can be difficult to predict.

The FDA, the EMA and regulatory authorities in other countries have each expressed interest in further regulating biotechnology products. Agencies at both the federal and state level in the United States, as well as the U.S. Congressional committees and other governments or governing agencies, have also expressed interest in further regulating the biotechnology industry. Such action may delay or prevent commercialization of some or all of our product candidates. Adverse developments in clinical trials of products conducted by others may cause the FDA or other oversight bodies to change the requirements for approval of any of our product candidates. These regulatory review agencies and committees and the new requirements or guidelines they promulgate may lengthen the regulatory review process, require us to perform additional studies or trials, increase our development costs, lead to changes in regulatory positions and interpretations, delay or prevent approval and commercialization of our product candidates or lead to significant post-approval limitations or restrictions. As we advance our product candidates, we will be required to consult with these regulatory agencies and comply with applicable requirements and guidelines. If we fail to do so, we may be required to delay or discontinue development of such product candidates. These additional processes may result in a review and approval process that is longer than we otherwise would have expected. Delays as a result of an increased or lengthier regulatory approval process or further restrictions on the development of our product candidates can be costly and could negatively impact our ability to complete clinical trials and commercialize our current and future product candidates in a timely manner, if at all.

The FDA and other regulatory agencies actively enforce the laws and regulations prohibiting the promotion of off-label uses.

If any of our product candidates are approved and we are found to have improperly promoted off-label uses of those products, we may become subject to significant liability. The FDA and other regulatory agencies strictly regulate the promotional claims that may be made about prescription products, if approved. In particular, while the FDA permits the dissemination of truthful and

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non-misleading information about an approved product, a manufacturer may not promote a product for uses that are not approved by the FDA or such other regulatory agencies as reflected in the product’s approved labeling. The federal government has levied large civil and criminal fines against companies for alleged improper promotion of off-label use and has enjoined several companies from engaging in off-label promotion. The FDA has also requested that companies enter into consent decrees, corporate integrity agreements or permanent injunctions under which specified promotional conduct must be changed or curtailed. If we cannot successfully manage the promotion of our product candidates, if approved, we could become subject to significant liability, which would materially adversely affect our business and financial condition.

Inadequate funding for the FDA, the SEC and other government agencies, including from government shut downs, or other disruptions to these agencies’ operations, could hinder their ability to hire and retain key leadership and other personnel, prevent new products and services from being developed or commercialized in a timely manner or otherwise prevent those agencies from performing normal business functions on which the operation of our business may rely, which could negatively impact our business.

The ability of the FDA to review and approve new products can be affected by a variety of factors, including government budget and funding levels, ability to hire and retain key personnel and accept the payment of user fees, and statutory, regulatory and policy changes. Average review times at the agency have fluctuated in recent years as a result. Disruptions at the FDA and other agencies may also slow the time necessary for new product candidates to be reviewed and/or approved by necessary government agencies, which would adversely affect our business.

For example, over the last several years the U.S. government has shut down several times and certain regulatory agencies, such as the FDA and the SEC, have had to furlough critical FDA, SEC and other government employees and stop critical activities. If a prolonged government shutdown occurs, it could significantly impact the ability of the FDA to timely review and process our regulatory submissions, which could have a material adverse effect on our business. Further, future government shutdowns could impact our ability to access the public markets and obtain necessary capital in order to properly capitalize and continue our operations.

Healthcare legislative reform measures may have a material adverse effect on our business and results of operations.

The U.S. and many foreign jurisdictions have enacted or proposed legislative and regulatory changes affecting the U.S. and global healthcare systems that could prevent or delay regulatory approval of our current or future product candidates or any future product candidates, restrict or regulate post-approval activities and affect our ability to profitably sell a product for which we obtain regulatory approval. Changes in regulations, statutes or the interpretation of existing regulations could impact our business in the future by requiring, for example: (i) changes to our manufacturing arrangements, (ii) additions or modifications to product labeling, (iii) the recall or discontinuation of our products or (iv) additional record-keeping requirements. If any such changes were to be imposed, they could adversely affect the operation of our business. In the U.S., there have been and continue to be, on-going legislative initiatives to contain healthcare costs. For example, in March 2010, the Patient Protection and Affordable Care Act, or the ACA, was passed, as amended by the Health Care and Education Reconciliation Act of 2010, which substantially changed the way healthcare is financed by both governmental and private insurers, and significantly impacted the U.S. pharmaceutical industry. The ACA, among other things, subjects biological products to potential competition by lower-cost biosimilars, increases the minimum Medicaid rebates owed by manufacturers under the Medicaid Drug Rebate Program, and extends the rebate program to individuals enrolled in Medicaid managed care organizations, establishes annual fees and taxes on manufacturers of certain branded prescription drugs, creates a new Medicare Part D coverage gap discount program, in which manufacturers must agree to offer 70% point-of-sale discounts off negotiated prices of applicable brand drugs to eligible beneficiaries during their coverage gap period, as a condition for the manufacturer’s outpatient drugs to be covered under Medicare Part D, and provided incentives to programs that increase the federal government’s comparative effectiveness research. Since then, the ACA risk adjustment program payment parameters have been updated annually.

Since the ACA’s enactment, there have been numerous judicial, administrative, executive and legislative challenges to certain aspects of the ACA and we expect that there will be additional challenges and amendments to the ACA in the future. On June 17, 2021, for example, the U.S. Supreme Court dismissed the most recent judicial challenge to the ACA brought by several states without specifically ruling on the constitutionality of the ACA. In addition, President Biden has issued multiple executive orders that have sought to reduce prescription drug costs. Although a number of these and other proposed measures may require authorization through additional legislation to become effective, and the Biden administration may reverse or otherwise change these measures, both the Biden administration and Congress have indicated that they will continue to seek new legislative measures to control drug costs. It is unclear how other healthcare reform measures of the Biden administrations or other efforts, if any, to challenge repeal or replace the ACA, will impact our business.

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In addition, other legislative and regulatory changes have been proposed and adopted in the United States since the ACA was enacted:

•The U.S. Budget Control Act of 2011, for example, included aggregate reductions of Medicare payments to providers of 2% per fiscal year that will remain in effect through 2032.

•The U.S. American Taxpayer Relief Act of 2012 further reduced Medicare payments to several types of providers and increased the statute of limitations period for the government to recover overpayments to providers from three to five years.

•The Right to Try Act (2018) provides a federal framework for certain patients to access certain investigational new drug products that have completed a Phase 1 clinical trial and that are undergoing investigation for FDA approval. Under certain circumstances, eligible patients can seek treatment without enrolling in clinical trials and without obtaining FDA permission under the FDA expanded access program. There is no obligation for a pharmaceutical manufacturer to make its drug products available to eligible patients as a result of the Right to Try Act.

•CMS published a final rule that allows Medicare Advantage Plans the option of using step therapy for Part B drugs, which began January 1, 2020.

•The U.S. American Rescue Plan Act of 2021, which eliminates the statutory Medicaid drug rebate cap, previously set at 100% of a drug’s average manufacturer price, for single source and innovator multiple source drugs, effective January 1, 2024. Due to the Statutory Pay-As-You-Go Act of 2010, estimated budget deficit increases resulting from the American Rescue Plan Act of 2021, and subsequent legislation, Medicare payments to providers will be further reduced starting in 2025 absent further legislation.

There has been increasing legislative and enforcement interest in the U.S. with respect to specialty drug pricing practices. Specifically, there have been several recent U.S. Congressional inquiries and proposed federal and state legislation designed to, among other things, bring more transparency to drug pricing, reduce the cost of prescription drugs under Medicare, review the relationship between pricing and manufacturer patient programs, and reform government program reimbursement methodologies for drugs.

The Inflation Reduction Act of 2022, or the IRA, includes several provisions that may impact our business, depending on how various aspects of the IRA are implemented. Provisions that may impact our business include a $2,000 out-of-pocket cap for Medicare Part D beneficiaries, the imposition of new manufacturer financial liability on most drugs in Medicare Part D, permitting the U.S. government to negotiate Medicare Part B and Part D pricing for certain high-cost drugs and biologics without generic or biosimilar competition, requiring companies to pay rebates to Medicare for drug prices that increase faster than inflation, and delay until January 1, 2032 the implementation of the HHS rebate rule that would have limited the fees that pharmacy benefit managers can charge. Further, under the IRA, orphan drugs are exempted from the Medicare drug price negotiation program, but only if they have one orphan designation and for which the only approved indication is for that disease or condition. If a product receives multiple orphan designations or has multiple approved indications, it may not qualify for the orphan drug exemption. The implementation of the IRA is currently subject to ongoing litigation challenging the constitutionality of the IRA’s Medicare drug price negotiation program. On August 15, 2024, CMS announced the results of the first round of negotiated prices between CMS and participating drug manufacturers for the ten selected drugs under the IRA’s Medicare drug price negotiation program. The negotiated prices go into effect in 2026 unless any ongoing litigation is successful in challenging the constitutionality of the IRA’s Medicare drug price negotiation program and provides a mechanism to block the implementation of the program. The effects of the IRA on our business and the healthcare industry in general is not yet known.

At the state level, individual states are increasingly aggressive in passing legislation and implementing regulations designed to control pharmaceutical and biological product pricing, including price or patient reimbursement constraints, discounts, restrictions on certain product access and marketing cost disclosure and transparency measures, and, in some cases, designed to encourage importation from other countries and bulk purchasing. In addition, regional health care authorities and individual hospitals are increasingly using bidding procedures to determine what pharmaceutical products and which suppliers will be included in their prescription drug and other health care programs. These measures could reduce the ultimate demand for our products, once approved, or put pressure on our product pricing.

We expect that additional state and federal healthcare reform measures will be adopted in the future, any of which could limit the amounts that federal and state governments will pay for healthcare products and services, or the frequency with which any such product candidate is prescribed or used, which could result in reduced demand for our current or future product candidates or additional pricing pressures. In particular any policy changes through CMS as well as local state Medicaid programs could have a significant impact on our business.

Our revenue prospects could be affected by changes in healthcare spending and policy in the U.S. and abroad. We operate in a highly regulated industry and new laws, regulations or judicial decisions, or new interpretations of existing laws, regulations or decisions, related to healthcare availability, the method of delivery or payment for healthcare products and services could negatively impact our business, operations and financial condition.

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There have been, and likely will continue to be, legislative and regulatory proposals at the foreign, federal and state levels directed at broadening the availability of healthcare and containing or lowering the cost of healthcare. We cannot predict the initiatives that may be adopted in the future, including repeal, replacement or significant revisions to the ACA. The continuing efforts of the government, insurance companies, managed care organizations and other payors of healthcare services to contain or reduce costs of healthcare and/or impose price controls may adversely affect:

•the demand for our current or future product candidates, if we obtain regulatory approval;

•our ability to set a price that we believe is fair for our products;

•our ability to obtain coverage and reimbursement approval for a product;

•our ability to generate revenue and achieve or maintain profitability;

•the level of taxes that we are required to pay; and

•the availability of capital.

Any reduction in reimbursement from Medicare or other government programs may result in a similar reduction in payments from private payors, which may adversely affect our future profitability.

Our relationships with customers, healthcare providers, physicians and third-party payors will be subject to applicable anti-kickback, fraud and abuse and other healthcare laws and regulations, which could expose us to criminal sanctions, civil penalties, exclusion from government healthcare programs, contractual damages, reputational harm and diminished future profits and earnings.

Although we do not currently have any products on the market, once we begin commercializing our product candidates, we will be subject to additional healthcare statutory and regulatory requirements and enforcement by the federal government and the states and foreign governments in which we conduct our business. Healthcare providers, physicians and third-party payors will play a primary role in the recommendation and prescription of any product candidates for which we obtain regulatory approval. Our future arrangements with third-party payors and customers may expose us to broadly applicable fraud and abuse and other healthcare laws and regulations that may constrain the business or financial arrangements and relationships through which we market, sell and distribute our product candidates for which we obtain regulatory approval. Restrictions under applicable federal and state healthcare laws and regulations, include the following:

•the U.S. federal Anti-Kickback Statute, which prohibits, among other things, persons from knowingly and willfully soliciting, offering, receiving or providing remuneration, directly or indirectly, in cash or in kind, to induce or reward either the referral of an individual for, or the purchase, order or recommendation of, any good or service, for which payment may be made under federal and state healthcare programs such as Medicare and Medicaid. A person or entity does not need to have actual knowledge of the statute or specific intent to violate it in order to have committed a violation. Violations are subject to civil and criminal fines and penalties for each violation, plus up to three times the remuneration involved, imprisonment of up to ten years, and exclusion from government healthcare programs. In addition, the government may assert that a claim including items or services resulting from a violation of the federal Anti-Kickback Statute constitutes a false or fraudulent claim for purposes of the federal False Claims Act or federal civil money penalties. The Anti-Kickback Statute has been interpreted to apply to arrangements between pharmaceutical manufacturers, on the one hand, and prescribers, purchasers and formulary managers, on the other. The HHS, Office of Inspector General, or OIG, heavily scrutinizes relationships between pharmaceutical companies and persons in a position to generate referrals for or the purchase of their products, such as physicians, other healthcare providers, and pharmacy benefit managers, among others. However, there are a number of statutory exceptions and regulatory safe harbors protecting some common activities from prosecution;

•the federal civil and criminal false claims and civil monetary penalties laws, including the federal False Claims Act, or FCA, which imposes criminal and civil penalties, including through civil whistleblower or qui tam actions, against individuals or entities for knowingly presenting, or causing to be presented, to the federal government, claims for payment that are false or fraudulent or making a false statement to avoid, decrease or conceal an obligation to pay money to the federal government. Manufacturers can be held liable under the FCA even when they do not submit claims directly to government payors if they are deemed to “cause” the submission of false or fraudulent claims. In addition, the government may assert that a claim including items and services resulting from a violation of the federal Anti-Kickback Statute constitutes a false of fraudulent claim for purposes of the False Claims Act. The federal False Claims Act also permits a private individual acting as a “whistleblower” to bring actions on behalf of the federal government alleging violations of the federal False Claims Act and to share in any monetary recovery;

•the federal Health Insurance Portability and Accountability Act of 1996, or HIPAA, which imposes criminal and civil liability for executing a scheme to defraud any healthcare benefit program (e.g. public or private), or knowingly and willfully falsifying, concealing or covering up a material fact or making any materially false statement in connection with

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the delivery of or payment for healthcare benefits, items or services; similar to the federal Anti-Kickback Statute, a person or entity does not need to have actual knowledge of the statute or specific intent to violate it in order to have committed a violation;

•the federal physician payment transparency requirements, sometimes referred to as the “Sunshine Act” under the ACA, which require manufacturers of drugs, devices, biologics and medical supplies that are reimbursable under Medicare, Medicaid, or the Children’s Health Insurance Program to report to HHS information related to transfers of value made to physicians, nurse practitioners, certified nurse anesthetists, physician assistants, clinical nurse specialists, and certified nurse midwives as well as teaching hospitals. Manufacturers are also required to disclose ownership and investment interests held by physicians and their immediate family members;

•federal consumer protection and unfair competition laws, which broadly regulate marketplace activities and activities that potentially harm consumers; and

•federal price reporting laws, which require manufacturers to calculate and report complex pricing metrics to government programs, where such reported prices may be used in the calculation of reimbursement and/or discounts on approved products.

We are also subject to state and foreign equivalents of each of the healthcare laws and regulations described above, among others, some of which may be broader in scope and may apply regardless of the payor. Many U.S. states have adopted laws similar to the federal Anti-Kickback Statute and False Claims Act, and may apply to our business practices, including, but not limited to, research, distribution, sales or marketing arrangements and claims involving healthcare items or services reimbursed by non-governmental payors, including private insurers. In addition, some states have passed laws that require pharmaceutical companies to comply with the April 2003 Office of Inspector General Compliance Program Guidance for Pharmaceutical Manufacturers and/or the Pharmaceutical Research and Manufacturers of America’s Code on Interactions with Healthcare Professionals. Several states also impose other marketing restrictions or require pharmaceutical companies to make marketing or price disclosures to the state and require the registration of pharmaceutical sales representatives. State and foreign laws, including for example the European Union General Data Protection Regulation, also govern the privacy and security of health information in some circumstances, many of which differ from each other in significant ways and often are not preempted by HIPAA, thus complicating compliance efforts. There are ambiguities as to what is required to comply with these state requirements and if we fail to comply with an applicable state law requirement we could be subject to penalties. Finally, there are state and foreign laws governing the privacy and security of health information, many of which differ from each other in significant ways and often are not preempted by HIPAA, thus complicating compliance efforts.

In the U.S., to help patients afford our approved product, we may utilize programs to assist them, including patient assistance programs and co-pay coupon programs for eligible patients. Government enforcement agencies have shown increased interest in pharmaceutical companies’ product and patient assistance programs, including reimbursement support services, and a number of investigations into these programs have resulted in significant civil and criminal settlements. In addition, at least one insurer has directed its network pharmacies to no longer accept co-pay coupons for certain specialty drugs the insurer identified. Our co-pay coupon programs could become the target of similar insurer actions. In addition, in November 2013, the CMS issued guidance to the issuers of qualified health plans sold through the ACA’s marketplaces encouraging such plans to reject patient cost-sharing support from third parties and indicating that the CMS intends to monitor the provision of such support and may take regulatory action to limit it in the future. The CMS subsequently issued a rule requiring individual market qualified health plans to accept third-party premium and cost-sharing payments from certain government-related entities. In September 2014, the OIG of the HHS issued a Special Advisory Bulletin warning manufacturers that they may be subject to sanctions under the federal anti-kickback statute and/or civil monetary penalty laws if they do not take appropriate steps to exclude Part D beneficiaries from using co-pay coupons. Accordingly, companies exclude these Part D beneficiaries from using co-pay coupons. It is possible that changes in insurer policies regarding co-pay coupons and/or the introduction and enactment of new legislation or regulatory action could restrict or otherwise negatively affect these patient support programs, which could result in fewer patients using affected products, and therefore could have a material adverse effect on our sales, business, and financial condition.

Third party patient assistance programs that receive financial support from companies have become the subject of enhanced government and regulatory scrutiny. The OIG has established guidelines that suggest that it is lawful for pharmaceutical manufacturers to make donations to charitable organizations who provide co-pay assistance to Medicare patients, provided that such organizations, among other things, are bona fide charities, are entirely independent of and not controlled by the manufacturer, provide aid to applicants on a first-come basis according to consistent financial criteria and do not link aid to use of a donor’s product. However, donations to patient assistance programs have received some negative publicity and have been the subject of multiple government enforcement actions, related to allegations regarding their use to promote branded pharmaceutical products over other less costly alternatives. Specifically, in recent years, there have been multiple settlements resulting out of government claims challenging the legality of their patient assistance programs under a variety of federal and state laws. It is possible that we may make grants to independent charitable foundations that help financially needy patients with their premium, co-pay, and co-insurance obligations. If we choose to do so, and if we or our vendors or donation recipients are deemed to fail to comply with relevant laws, regulations or evolving government guidance in the operation of these programs, we could be subject to damages,

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fines, penalties, or other criminal, civil or administrative sanctions or enforcement actions. We cannot ensure that our compliance controls, policies, and procedures will be sufficient to protect against acts of our employees, business partners or vendors that may violate the laws or regulations of the jurisdictions in which we operate. Regardless of whether we have complied with the law, a government investigation could impact our business practices, harm our reputation, divert the attention of management, increase our expenses and reduce the availability of foundation support for our patients who need assistance.

The scope and enforcement of each of these laws is uncertain and subject to rapid change in the current environment of healthcare reform, especially in light of the lack of applicable precedent and regulations. Federal and state enforcement bodies have recently increased their scrutiny of interactions between healthcare companies and healthcare providers, which has led to a number of investigations, prosecutions, convictions and settlements in the healthcare industry.

Ensuring that our future business arrangements with third parties comply with applicable healthcare laws and regulations could involve substantial costs. It is possible that governmental authorities will conclude that our business practices do not comply with current or future statutes, regulations or case law involving applicable fraud and abuse or other healthcare laws and regulations. If our operations, including anticipated activities to be conducted by our sales team, were to be found to be in violation of any of these laws or any other governmental regulations that may apply to us, we may be subject to significant civil, criminal and administrative penalties, damages, fines, disgorgement, imprisonment, the exclusion from participation in federal and state government funded healthcare programs, such as Medicare and Medicaid, reputational harm, and the curtailment or restructuring of our operations. It may also subject us to additional reporting obligations and oversight, if we become subject to a corporate integrity agreement, deferred prosecution agreement, or other agreement to resolve allegations of non-compliance with these laws. If any of the physicians or other providers or entities with whom we expect to do business is found not to be in compliance with applicable laws, they may be subject to similar criminal, civil or administrative sanctions, including exclusions from government funded healthcare programs.

If we fail to comply with environmental, health and safety laws and regulations, we could become subject to fines or penalties or incur costs that could have a material adverse effect on the success of our business.

We are subject to numerous environmental, health and safety laws and regulations, including those governing laboratory procedures and the handling, use, storage, treatment and disposal of hazardous materials and wastes. Our operations involve the use of hazardous and flammable materials, including chemicals and biological and radioactive materials. Our operations also produce hazardous waste products. We generally contract with third parties for the disposal of these materials and wastes. We cannot eliminate the risk of contamination or injury from these materials. In the event of contamination or injury resulting from our use of hazardous materials, we could be held liable for any resulting damages, and any liability could exceed our resources. We also could incur significant costs associated with civil or criminal fines and penalties.

Although we maintain workers’ compensation insurance to cover us for costs and expenses we may incur due to injuries to our employees resulting from the use of hazardous materials, this insurance may not provide adequate coverage against potential liabilities. We do not maintain insurance for environmental liability or toxic tort claims that may be asserted against us in connection with our storage or disposal of biological, hazardous or radioactive materials. In addition, we may incur substantial costs in order to comply with current or future environmental, health and safety laws and regulations. Current or future environmental laws and regulations may impair our research, development and production efforts, which could harm our business, prospects, financial condition or results of operations.

Compliance with U.S. and global privacy and data security requirements could result in additional costs and liabilities to us or inhibit our ability to collect and process data globally, and the failure to comply with such requirements could expose us to criminal sanctions, civil penalties, contractual damages, reputational harm, administrative burdens and diminished profits and future earnings.

The regulatory framework for the collection, use, safeguarding, sharing, transfer and other processing of information worldwide is rapidly evolving and is likely to remain uncertain for the foreseeable future. We possess and process sensitive information, including patient health information. In the U.S., there are numerous federal and state privacy and data security laws and regulations governing the collection, use, disclosure and protection of personal information, including health information privacy laws, security breach notification laws and consumer protection laws. These federal and state laws, in many cases, are not preempted by HIPAA and may be subject to varying interpretations by the courts and government agencies. These varying interpretations can create complex compliance issues for us and our partners and potentially expose us to additional expense, adverse publicity and liability, any of which could adversely affect our business. There is ongoing concern from privacy advocates, regulators and others regarding data privacy and security issues, and the number of jurisdictions with data privacy and security laws has been increasing. Also, there are ongoing public policy discussions regarding whether the standards for de-identification, anonymization or pseudonymization of health information are sufficient, and the risk of re-identification sufficiently small, to adequately protect patient privacy. We expect that there will continue to be new proposed and amended laws, regulations and industry standards concerning privacy, data protection and information security in the United States. For example, California enacted the California Consumer Privacy Act, or CCPA, which took effect on January 1, 2020, and became enforceable by the California Attorney General

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on July 1, 2020. This law broadly defines personal information, gives California residents expanded rights to access and delete their personal information, and places stringent privacy and security obligations on businesses covered by the law, including obligations to provide detailed disclosures to California consumers about their data collection, use and sharing practices, and to provide such consumers with ways to opt out of certain sales or transfers of personal information. It also provides for civil penalties for violations, and allows for a private right of action for data breaches that is expected to increase data breach litigation. In addition, the California Privacy Rights Act, or CPRA, which became effective on January 1, 2023, significantly modified the CCPA by expanding consumer rights with respect to certain sensitive information, and creating a new state agency that is vested with authority to implement and enforce the CCPA.

Comprehensive laws similar to the CCPA have been passed in numerous other states outside of California and proposed in others. These laws are substantially similar in scope and contain many of the same requirements and exceptions as the CCPA, including a general exemption for clinical trial data and limited obligations for entities regulated by HIPAA. However, we cannot yet determine the full impact these laws or other such future laws, regulations and standards may have on our current or future business. Any of these laws may broaden their scope in the future, and similar laws have been proposed on both a federal level and in more than half of the states in the U.S. In addition, a number of other states have proposed new privacy laws, some of which are similar to the above discussed recently passed laws. Such proposed legislation, if enacted, may add additional complexity, variation in requirements, restrictions and potential legal risk, require additional investment of resources in compliance programs, impact strategies and the availability of previously useful data and could result in increased compliance costs and/or changes in business practices and policies. Furthermore, in addition to comprehensive privacy laws, certain states have enacted laws to focus on particular more limited privacy laws. For example, the state of Washington has passed a law to protect medical and health information not subject to HIPAA. This law has a private right of action, which further increases the relevant compliance risk. Connecticut and Nevada have also passed similar laws regulating consumer health data. In addition, other states have proposed and/or passed legislation that regulates the privacy and/or security of certain specific types of information. For example, a small number of states have passed laws that regulate biometric information. The existence of comprehensive privacy laws in different states in the country would make our compliance obligations more complex and costly and may increase the likelihood that we may be subject to enforcement actions or otherwise incur liability for noncompliance. These various privacy and security laws may impact our business activities, including our identification of research subjects, relationships with business partners and ultimately the marketing and distribution of our products. State laws are changing rapidly and there have been proposals for a new comprehensive federal data privacy law to which we may likely become subject, if enacted.

The collection, use, storage, disclosure, transfer or other processing of personal data regarding individuals in the EEA and UK, including personal health data, is subject to the EU General Data Protection Regulation 2016/679, or EU GDPR, with respect to individuals in the EEA and the UK General Data Protection Regulation (following the incorporation of the EU GDPR into UK law), or UK GDPR, with respect to individuals in the UK, and together with the EU GDPR, GDPR. The GDPR is wide-ranging in scope and imposes numerous requirements on companies that process personal data, including requirements relating to having a legal basis for processing personal data, stricter requirements relating to processing sensitive data (such as health data), where required by GDPR obtaining consent of the individuals to whom the personal data relates, providing information to individuals regarding data processing activities, implementing safeguards to protect the security and confidentiality of personal data, providing notification of data breaches, requiring data protection impact assessments for high risk processing and taking certain measures when engaging third-party processors. The GDPR permits data protection authorities to impose large penalties for violations of the GDPR, including potential fines of up to €20 million (17.5 million for the UK) or 4% of annual global revenues, whichever is greater. The GDPR also confers a private right of action on data subjects and consumer associations to lodge complaints with supervisory authorities, seek judicial remedies, and obtain compensation for damages resulting from violations of the GDPR. The GDPR increased our responsibility and liability in relation to personal data that we process where such processing is subject to the GDPR, and we may be required to put in place additional mechanisms to ensure compliance with the GDPR, including as implemented by individual countries. Compliance with the GDPR is a rigorous and time-intensive process that may increase our cost of doing business or require us to change our business practices, and despite those efforts, there is a risk that we may be subject to fines and penalties, litigation, and reputational harm in connection with our European activities.

The GDPR provides that EEA Member States may make their own further laws and regulations in relation to the processing of genetic, biometric or health data, which could result in differences between Member States, limit our ability to use and share personal data or could cause our costs to increase, and harm our business and financial condition.

The GDPR also imposes strict rules on the transfer of personal data to countries outside the EEA and UK not deemed adequate for the transfer of such personal data by competent data protection authorities, or third countries, including the United States in certain circumstances unless a derogation exists or we may need to incorporate a GDPR transfer mechanism (such as the European Commission approved standard contractual clauses, or SCCs or the UK International Data Transfer Addendum, or IDTA) into our agreements with third parties to govern such transfers of personal data and carry out transfer impact assessments. Further, the European Union and United States have adopted its adequacy decision for the EU-U.S. Data Privacy Framework, or the Framework, which entered into force on July 11, 2023. This Framework provides that the protection of personal data transferred between the European Union and the United States is comparable to that offered in the European Union. This provides a further avenue to ensuring transfers to the United States are carried out in line with GDPR. There has been an extension to the Framework to cover

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UK transfers to the United States. The Framework could be challenged like its predecessor frameworks. The international transfer obligations under the EEA and UK data protection regimes will require effort and cost and may result in us needing to make strategic considerations around where EEA/UK personal data is located and which service providers we can utilize for the processing of EEA/UK personal data.

Although the UK is regarded as a third country under the EU GDPR, the European Commission has issued an “Adequacy Decision” recognizing the UK as providing adequate protection under the EU GDPR and, therefore, transfers of personal data subject to the EU GDPR to the UK remain unrestricted. The UK government has confirmed that personal data transfers from the UK to the EEA remain free flowing. The UK Government has also now introduced a Data Protection and Digital Information Bill, or the UK Bill, into the UK legislative process with the intention for this bill to reform the UK’s data protection regime following Brexit. If passed, the final version of the UK Bill may have the effect of further altering the similarities between the UK and EU data protection regime and threaten the UK Adequacy Decision from the EU Commission. This may lead to additional compliance costs and could increase our overall risk.

All of these evolving compliance and operational requirements impose potentially significant costs, such as costs related to organizational changes, implementing additional protection technologies, training employees and engaging consultants and legal advisors, which are likely to increase over time. In addition, such requirements may require us to modify our data processing practices and policies, utilize management’s time and/or divert resources from other initiatives and projects. If we or third-party CDMOs, CROs or other contractors or consultants fail to comply with U.S. and international data protection laws and regulations, it could result in government enforcement actions (which could include civil or criminal penalties), private litigation, and/or adverse publicity and could negatively affect our operating results and business. Moreover, clinical trial subjects about whom we or our potential collaborators obtain information, as well as the providers who share this information with us, may contractually limit our ability to use and disclose the information. Claims that we have violated individuals’ privacy rights, failed to comply with data protection laws, or breached our contractual obligations, even if we are not found liable, could be expensive and time-consuming to defend and could result in adverse publicity that could harm our business, financial condition, results of operations and prospects.

The use of new and evolving technologies, such as artificial intelligence, in our business may result in spending material resources and presents risks and challenges that can impact our business including by posing security and other risks to our confidential and/or proprietary information, including personal information, and as a result we may be exposed to reputational harm and liability.

We may use and integrate artificial intelligence, or AI, into our business processes, and this innovation presents risks and challenges that could affect its adoption, and therefore our business. If we enable or offer solutions that draw controversy due to perceived or actual negative societal impact, we may experience brand or reputational harm, competitive harm or legal liability. The use of certain AI technology can give rise to intellectual property risks, including compromises to proprietary intellectual property and intellectual property infringement. To the extent we develop our own AI systems, then the risk of intellectual property infringement could arise from third party data sources being used to train our AI models, and from the output of AI systems reproducing or incorporating third party intellectual property rights, in each case without the right to do so. Further, a risk of our proprietary intellectual property rights being compromised through the use of AI could arise through third party vendors using our data to train their models and/or to generate output for other users of their systems. If our third party vendors use our data (which includes personal data) to train their AI models and/or to generate output for other users of their systems, this could also give rise to regulatory risks. Additionally, we expect to see increasing government and supranational regulation related to AI use and ethics, which may also significantly increase the burden and cost of research, development and compliance in this area. For example, the European Union’s Artificial Intelligence Act, or the AI Act, the world’s first comprehensive AI law, entered into force in August 2024 and, with some exceptions, becomes effective in August 2025. This legislation imposes significant obligations on providers and deployers of high risk AI systems, and encourages providers and deployers of AI systems to account for European Union ethical principles in their development and use of these systems. If we develop or use AI systems that are governed by the AI Act, it may necessitate ensuring higher standards of data quality, transparency, and human oversight, as well as adhering to specific and potentially burdensome and costly ethical, accountability, and administrative requirements. The rapid evolution of AI will require the application of significant resources to design, develop, test and maintain our products and services to help ensure that AI is implemented in accordance with applicable law and regulation and in a socially responsible manner and to minimize any real or perceived unintended harmful impacts. Our vendors may in turn incorporate AI tools into their offerings, and the providers of these AI tools may not meet existing or rapidly evolving regulatory or industry standards, including with respect to privacy and data security. Further, bad actors around the world use increasingly sophisticated methods, including the use of AI, to engage in illegal activities involving the theft and misuse of personal information, confidential information and intellectual property. Any of these effects could damage our reputation, result in the loss of valuable property and information, cause us to breach applicable laws and regulations, and adversely impact our business.

Laws and regulations governing any international operations we may have in the future may preclude us from developing, manufacturing and selling certain products outside of the United States and require us to develop and implement costly compliance programs.

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If we expand our operations outside of the United States, we must dedicate additional resources to comply with numerous laws and regulations in each jurisdiction in which we plan to operate. The Foreign Corrupt Practices Act, or FCPA, prohibits any U.S. individual or business from paying, offering, authorizing payment or offering of anything of value, directly or indirectly, to any foreign official, political party or candidate for the purpose of influencing any act or decision of the foreign entity in order to assist the individual or business in obtaining or retaining business. The FCPA also obligates companies whose securities are listed in the United States to comply with certain accounting provisions requiring the company to maintain books and records that accurately and fairly reflect all transactions of the corporation, including international subsidiaries, and to devise and maintain an adequate system of internal accounting controls for international operations.

Compliance with the FCPA is expensive and difficult, particularly in countries in which corruption is a recognized problem. In addition, the FCPA presents particular challenges in the pharmaceutical industry, because, in many countries, hospitals are operated by the government, and doctors and other hospital employees are considered foreign officials. Certain payments to hospitals in connection with clinical trials and other work have been deemed to be improper payments to government officials and have led to FCPA enforcement actions.

Various laws, regulations and executive orders also restrict the use and dissemination outside of the United States, or the sharing with certain non-U.S. nationals, of information classified for national security purposes, as well as certain products and technical data relating to those products. If we expand our presence outside of the United States, it will require us to dedicate additional resources to comply with these laws, and these laws may preclude us from developing, manufacturing, or selling certain products and product candidates outside of the United States, which could limit our growth potential and increase our development costs.

The failure to comply with laws governing international business practices may result in substantial civil and criminal penalties and suspension or debarment from government contracting. The SEC also may suspend or bar issuers from trading securities on U.S. exchanges for violations of the FCPA’s accounting provisions.

Risks Relating to Employee Matters and Managing Growth

Our future success depends on our ability to retain key executives and experienced scientists and to attract, retain, and motivate qualified personnel.

We are highly dependent on many of our key employees and members of our executive management team as well as the other principal members of our management, scientific and clinical teams. Although we have entered into employment letter agreements with certain of our executive officers, each of them may terminate their employment with us at any time. We do not maintain “key person” insurance for any of our executives or other employees. In addition, we rely on consultants and advisors, including scientific and clinical advisors, to assist us in formulating our research and development and commercialization strategy. Our consultants and advisors may be employed by employers other than us and may have commitments under consulting or advisory contracts with other entities that may limit their availability to us. If we are unable to continue to attract and retain high quality personnel, our ability to pursue our growth strategy will be limited.

Recruiting and retaining qualified scientific, clinical, manufacturing and sales and marketing personnel will also be critical to our success. The loss of the services of our executive officers or other key employees, including temporary loss due to illness, could impede the achievement of our research, development and commercialization objectives and seriously harm our ability to successfully implement our business strategy. Furthermore, replacing executive officers and key employees may be difficult and may take an extended period of time because of the limited number of individuals in our industry with the breadth of skills and experience required to successfully develop, gain regulatory approval of and commercialize products. Competition to hire from this limited pool is intense, and we may be unable to hire, train, retain or motivate these key personnel on acceptable terms given the competition among numerous pharmaceutical and biotechnology companies for similar personnel. We also experience competition for the hiring of scientific and clinical personnel from universities and research institutions. Failure to succeed in clinical trials may make it more challenging to recruit and retain qualified scientific personnel.

In particular, we have experienced a very competitive hiring environment in the greater Boston area of Massachusetts, where we are headquartered. Many of the other pharmaceutical companies that we compete against for qualified personnel have greater financial and other resources, different risk profiles and a longer history in the industry than we do. They also may provide more diverse opportunities and better chances for career advancement. Some of these characteristics may be more appealing to high-quality candidates than what we have to offer. If we are unable to continue to attract and retain high-quality personnel, the rate and success with which we can discover and develop product candidates and our business will be limited.

We may be unable to adequately protect our information systems and infrastructure from cyberattacks or security compromises, incidents or breaches, which could result in the disclosure of confidential or proprietary information, including personal data, damage our reputation, and subject us to significant financial and legal exposure.

We rely on information technology systems and infrastructure that we or our third-party providers operate to process, transmit and store electronic information in our day-to-day operations. In connection with our product discovery efforts, we may collect and

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use a variety of personal data and other confidential and/or proprietary data, such as names, mailing addresses, email addresses, phone numbers and clinical trial information. A successful cyberattack could result in the theft, destruction or misuse of intellectual property, data, or other misappropriation of assets, or otherwise compromise our confidential or proprietary information and disrupt our operations. Cyberattacks generally are increasing in their frequency, sophistication and intensity, and have become increasingly difficult to detect. Cyberattacks could include wrongful conduct by hostile foreign governments, employees, contractors or other third-parties and industrial espionage, wire fraud and other forms of cyber fraud, the deployment of harmful malware, denial-of-service, social engineering fraud or other means to threaten or compromise the security, confidentiality, integrity and availability of systems and information. A successful cyberattack could cause serious negative consequences for us, including, without limitation, the disruption of operations, the misappropriation of protected information or confidential business information, including personal data, financial information, trade secrets, financial loss and the disclosure of corporate strategic plans. Although we devote resources designed to protect our information systems and infrastructure, we realize that cyberattacks are a threat, and there can be no assurance that our efforts will prevent or adequately address information security compromises, incidents or breaches that would result in business, legal, financial or reputational harm to it, or would have a material adverse effect on our results of operations and financial condition. Any failure to prevent or mitigate security breaches, compromises or incidents or improper access to, use of, or disclosure of protected information, including our clinical data or patients’ personal data could result in significant liability through litigation and regulatory investigations and enforcement actions, including under state (e.g., state breach notification and consumer protection laws), federal (e.g., HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act of 2009 (HITECH)), and international law (e.g., the GDPR), and may cause a material adverse impact to our reputation, affect our ability to conduct new studies and potentially disrupt our business.

We rely on our third-party providers to implement effective security measures and identify and correct for any such failures, deficiencies, vulnerabilities, compromises, incidents or breaches. We also rely on our employees and consultants to safeguard their security credentials and follow our policies and procedures regarding use and access of computers and other devices that may contain protected information and our sensitive information. If we or our third-party providers fail to maintain or protect our information technology systems, infrastructure and data integrity effectively or fail to anticipate, plan for or manage significant disruptions to our information technology systems and infrastructure, we or our third-party providers could have difficulty preventing, detecting and controlling such cyber-attacks, and any such attacks could result in the losses described above as well as disputes with physicians, patients and our partners, regulatory sanctions or penalties, increases in operating expenses, expenses or lost revenue or other adverse consequences, any of which could have a material adverse effect on our business, results of operations, financial condition, prospects and cash flows. Any failure by such third parties to prevent or adequately mitigate security breaches, compromises or incidents or improper access to or disclosure of such information could have similarly adverse consequences for us. If we are unable to prevent or adequately mitigate the impact of such security or data privacy incidents, compromises or breaches, we could be exposed to litigation and governmental investigations, inquiries, orders, penalties or fines, which could lead to a potential disruption to our business and financial penalties or losses. By way of example, the CCPA, which was modified by the CPRA, creates individual privacy rights for California consumers and increases the privacy and security obligations of entities handling certain personal data. The CCPA provides for civil penalties of up to $7,500 per violation, as well as a private right of action for data breaches that has, and is expected to continue to, increase the volume of data breach related litigation filed in California.

We expect to expand our development and regulatory capabilities and potentially implement sales, marketing and distribution capabilities, and as a result, we may encounter difficulties in managing our growth, which could disrupt our operations.

As of October 31, 2024, we had 82 full-time employees and no part-time employees. We expect to experience significant growth in the number of our employees and the scope of our operations, particularly as we mature as a public company and in the areas of product development, regulatory affairs and, if any of our product candidates receives regulatory approval, sales, marketing and distribution. To manage our anticipated future growth, we must continue to implement and improve our managerial, operational and financial systems, expand our facilities and continue to recruit and train additional qualified personnel. Due to our limited financial resources, we may not be able to effectively manage the expansion of our operations or recruit and train additional qualified personnel. The expansion of our operations may lead to significant costs and may divert our management and business development resources. Any inability to manage growth could delay the execution of our business plans or disrupt our operations.

We may acquire additional businesses or products, form strategic alliances or create joint ventures with third parties that we believe will complement or augment our existing business. If we acquire businesses with promising markets or technologies, we may not be able to realize the benefit of acquiring such businesses if we are unable to successfully integrate them with our existing operations and company culture. We may encounter numerous difficulties in developing, manufacturing and marketing any new products resulting from a strategic alliance or acquisition that delay or prevent us from realizing their expected benefits or enhancing our business. We cannot assure you that, following any such acquisition, we will achieve the expected synergies to justify the transaction.

General Risk Factors

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Adverse developments affecting the financial services industry, such as actual events or concerns involving liquidity, defaults, or non-performance by financial institutions or transactional counterparties, could adversely affect the Company’s current and projected business operations and its financial condition and results of operations.

Events involving limited liquidity, defaults, non-performance or other adverse developments that affect financial institutions, transactional counterparties or other companies in the financial services industry or the financial services industry generally, or concerns or rumors about any events of these kinds or other similar risks, have in the past and may in the future lead to market-wide liquidity problems. For example, on March 10, 2023, Silicon Valley Bank, or SVB, was closed by the California Department of Financial Protection and Innovation, which appointed the Federal Deposit Insurance Corporation, or FDIC, as receiver. Similarly, on March 12, 2023, Signature Bank and Silvergate Capital Corp. were each placed into receivership. Although a statement by the Department of the Treasury, the Federal Reserve and the FDIC indicated that all depositors of SVB (such as our Company) would have access to all of their money after only one business day of closure, including funds held in uninsured deposit accounts, borrowers under credit agreements, letters of credit and certain other financial instruments with SVB, Signature Bank or any other financial institution that is placed into receivership by the FDIC may be unable to access undrawn amounts thereunder. Subsequent to these events, additional financial institutions have experienced similar failures and have been placed into receivership. It is possible that other banks will face similar difficulty in the future.

Although we assess our banking relationships as we believe necessary or appropriate, our access to funding sources and other credit arrangements in amounts adequate to finance or capitalize our current and projected future business operations could be significantly impaired by factors that affect the Company, the financial institutions with which the Company has credit agreements or arrangements directly, such as Hercules Capital, or the financial services industry or economy in general. These factors could include, among others, events such as liquidity constraints or failures, the ability to perform obligations under various types of financial, credit or liquidity agreements or arrangements, disruptions or instability in the financial services industry or financial markets, or concerns or negative expectations about the prospects for companies in the financial services industry. These factors could involve financial institutions or financial services industry companies with which the Company has financial or business relationships, but could also include factors involving financial markets or the financial services industry generally.

In addition, investor concerns regarding the U.S. or international financial systems could result in less favorable commercial financing terms, including higher interest rates or costs and tighter financial and operating covenants, or systemic limitations on access to credit and liquidity sources, thereby making it more difficult for us to acquire financing on acceptable terms or at all. Any decline in available funding or access to our cash and liquidity resources could, among other risks, adversely impact our ability to meet our operating expenses, financial obligations or fulfill our other obligations, result in breaches of our financial and/or contractual obligations or result in violations of federal or state wage and hour laws. Any of these impacts, or any other impacts resulting from the factors described above or other related or similar factors not described above, could have material adverse impacts on our liquidity and our current and/or projected business operations and financial condition and results of operations.

Changes in tax law may adversely affect us or our investors.

The rules dealing with U.S. federal, state and local income taxation are constantly under review by persons involved in the legislative process and by the Internal Revenue Service, or IRS, and the U.S. Treasury Department. Changes to tax laws (which changes may have retroactive application) could adversely affect us or holders of our common stock. In recent years, many such changes have been made and changes are likely to continue to occur in the future. For example, under Section 174 of the Code, in taxable years beginning after December 31, 2021, expenses that are incurred for research and development in the U.S. will be capitalized and amortized, which may have an adverse effect on our cash flow. It cannot be predicted whether, when, in what form or with what effective dates tax laws, regulations and rulings may be enacted, promulgated or issued, which could result in an increase in our or our stockholders’ tax liability or require changes in the manner in which we operate in order to minimize or mitigate any adverse effects of changes in tax law. Prospective investors should consult their tax advisors regarding the potential consequences of changes in tax law on our business and on the ownership and disposition of our common stock.

Our future taxable income may be subject to certain limitations.

As of December 31, 2023, we had federal and state net operating loss carryforwards of $88.1 million and $91.7 million, respectively. Substantially all of the federal NOLs are not subject to expiration and the state NOLs begin to expire in 2037. As of December 31, 2023, we also had federal and state research and development tax credit carryforwards of $5.8 million and $1.8 million, respectively, which begin to expire in 2032. These net operating loss and tax credit carryforwards could expire unused and be unavailable to offset future income tax liabilities. Under current law, unused U.S. federal and certain state net operating losses generated for tax years beginning after December 31, 2017 are not subject to expiration and may be carried forward indefinitely. Such U.S. federal net operating losses generally may not be carried back to prior taxable years, except that, net operating losses generated in 2019, 2020 and 2021 may be carried back to each of the five tax years preceding the tax years of such losses. For taxable years beginning after December 31, 2020, the deductibility of U.S. federal net operating losses generated for tax years beginning after December 31, 2017 is limited to 80% of our taxable income in any future taxable year. In addition, in general, under Sections 382 and 383 of the Internal Revenue Code of 1986, as amended, or the Code, a corporation that undergoes an “ownership

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change” is subject to limitations on its ability to utilize its pre-change net operating losses or tax credits, or NOLs or credits, to offset future taxable income or taxes. For these purposes, an ownership change generally occurs when one or more stockholders or groups of stockholders who each owns at least 5% of a corporation’s stock increase their aggregate stock ownership by more than 50 percentage points over their lowest ownership percentage within a specified testing period. Our existing NOLs or credits may be subject to limitations arising from previous ownership changes, and if we undergo an ownership change after the merger, our ability to utilize NOLs or credits could be further limited by Sections 382 and 383 of the Code. In addition, future changes in our stock ownership, many of which are outside of our control, could result in an ownership change under Sections 382 and 383 of the Code. Our NOLs or credits may also be impaired under state law. Accordingly, we may not be able to utilize a material portion of our NOLs or credits.

We are subject to certain U.S. and foreign anti-corruption, anti-money laundering, export control, sanctions and other trade laws and regulations. We can face serious consequences for violations.

Among other matters, U.S. and foreign anti-corruption, anti-money laundering, export control, sanctions and other trade laws and regulations, which are collectively referred to as Trade Laws, prohibit companies and their employees, agents, CROs, legal counsel, accountants, consultants, contractors and other partners from authorizing, promising, offering, providing, soliciting, or receiving directly or indirectly, corrupt or improper payments or anything else of value to or from recipients in the public or private sector. Violations of Trade Laws can result in substantial criminal fines and civil penalties, imprisonment, the loss of trade privileges, debarment, tax reassessments, breach of contract and fraud litigation, reputational harm and other consequences. We have direct or indirect interactions with officials and employees of government agencies or government-affiliated hospitals, universities, and other organizations. We also expect our non-U.S. activities to increase in time. We currently engage, and expect to continue to engage, third parties for clinical trials and/or to obtain necessary permits, licenses, patent registrations and other regulatory approvals and we can be held liable for the corrupt or other illegal activities of our personnel, agents, or partners, even if we do not explicitly authorize or have prior knowledge of such activities.

Unfavorable global economic conditions could adversely affect our business, financial condition or results of operations.

Our results of operations could be adversely affected by general conditions in the global economy and in the global financial markets. For example, in 2008, the global financial crisis caused extreme volatility and disruptions in the capital and credit markets and the COVID-19 pandemic caused significant volatility and uncertainty in U.S. and international markets. See “Risks Related to the Discovery and Development of Our Product Candidates-A pandemic, epidemic, or outbreak of an infectious or highly contagious disease may materially and adversely affect our business and financial results and could cause a disruption to the development of our product candidates.” Interest rates in the U.S. have recently increased to levels not seen in decades. In addition, the impact of geopolitical tension, such as a deterioration in the bilateral relationship between the United States and China or an escalation in conflict between Russia and Ukraine and between Israel and Hamas, including any resulting sanctions, export controls or other restrictive actions, also could lead to disruption, instability and volatility in the global markets. A severe or prolonged economic downturn could result in a variety of risks to our business, including, weakened demand for our product candidates and our ability to raise additional capital when needed on acceptable terms, if at all. A weak or declining economy could also strain our suppliers, possibly resulting in supply disruption, or cause our customers to delay making payments for our products. Any of the foregoing could harm our business and we cannot anticipate all of the ways in which the current economic climate and financial market conditions could adversely impact our business.

Our employees, principal investigators, CROs and consultants may engage in misconduct or other improper activities, including non-compliance with regulatory standards and requirements or insider trading.

We are exposed to the risk that our employees, principal investigators, CROs and consultants may engage in fraudulent conduct or other illegal activity. Misconduct by these parties could include intentional, reckless and/or negligent conduct or disclosure of unauthorized activities to us that violate the regulations of the FDA and other regulatory authorities, including those laws requiring the reporting of true, complete and accurate information to such authorities; healthcare fraud and abuse laws and regulations in the United States and abroad; or laws that require the reporting of financial information or data accurately. In particular, sales, marketing and business arrangements in the healthcare industry are subject to extensive laws and regulations intended to prevent fraud, misconduct, kickbacks, self-dealing and other abusive practices. These laws and regulations may restrict or prohibit a wide range of pricing, discounting, marketing and promotion, sales commission, customer incentive programs and other business arrangements. Other activities subject to these laws include the improper use of information obtained in the course of clinical trials or creating fraudulent data in our preclinical studies or clinical trials, which could result in regulatory sanctions and cause serious harm to our reputation. We have adopted a code of conduct applicable to all of our employees, but it is not always possible to identify and deter misconduct by employees and other third parties, and the precautions we take to detect and prevent this activity may not be effective in controlling unknown or unmanaged risks or losses or in protecting us from governmental investigations or other actions or lawsuits stemming from a failure to comply with these laws or regulations. Additionally, we are subject to the risk that a person could allege such fraud or other misconduct, even if none occurred. If any such actions are instituted against us, and we are not successful in defending ourself or asserting our rights, those actions could have a significant impact on

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our business, including the imposition of civil, criminal and administrative penalties, damages, monetary fines, possible exclusion from participation in Medicare, Medicaid and other federal healthcare programs, contractual damages, reputational harm, diminished profits and future earnings, and curtailment of our operations, any of which could adversely affect our ability to operate our business and our results of operations.

The market price of our common stock is expected to be volatile.

The market price of our common stock following the merger could be subject to significant fluctuations. Some of the factors that may cause the market price of our common stock to fluctuate include:

•results of clinical trials and preclinical studies of our product candidates, or those of our competitors or our existing or future collaborators;

•failure to meet or exceed financial and development projections we may provide to the public;

•failure to meet or exceed the financial and development projections of the investment community;

•if we do not achieve the perceived benefits of the merger as rapidly or to the extent anticipated by financial or industry analysts;

•announcements of significant acquisitions, strategic collaborations, joint ventures or capital commitments by us or our competitors;

•actions taken by regulatory agencies with respect to our product candidates, clinical studies, manufacturing process or sales and marketing terms;

•disputes or other developments relating to proprietary rights, including patents, litigation matters, and our ability to obtain patent protection for our technologies;

•additions or departures of key personnel;

•significant lawsuits, including patent or stockholder litigation;

•if securities or industry analysts do not publish research or reports about our business, or if they issue adverse or misleading opinions regarding our business and stock;

•changes in the market valuations of similar companies;

•general market or macroeconomic conditions or market conditions in the pharmaceutical and biotechnology sectors;

•sales of securities by us or our securityholders in the future;

•if we fail to raise an adequate amount of capital to fund our operations and continued development of our product candidates;

•trading volume of our common stock;

•announcements by competitors of new commercial products, clinical progress or lack thereof, significant contracts, commercial relationships or capital commitments;

•adverse publicity relating to precision medicine product candidates, including with respect to other products in such markets;

•the introduction of technological innovations or new therapies that compete with our products and services; and

•period-to-period fluctuations in our financial results.

Moreover, the stock markets in general have experienced substantial volatility that has often been unrelated to the operating performance of individual companies. These broad market fluctuations may also adversely affect the trading price of our common stock. In addition, a recession, depression or other sustained adverse market event could materially and adversely affect our business and the value of our common stock. In the past, following periods of volatility in the market price of a company’s securities, stockholders have often instituted class action securities litigation against such companies. Furthermore, market volatility may lead to increased shareholder activism if we experience a market valuation that activists believe is not reflective of our intrinsic value. Activist campaigns that contest or conflict with our strategic direction or seek changes in the composition of our board of directors could have an adverse effect on our operating results and financial condition.

We have incurred and will continue to incur increased costs and increased demands upon management as a result of complying with the laws and regulations affecting public companies.

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We will continue to incur significant legal, accounting and other expenses as a public company that we did not incur as a private company, including costs associated with public company reporting obligations under the Securities Exchange Act of 1934, as amended, or the Exchange Act. The Sarbanes-Oxley Act of 2002, the Dodd-Frank Wall Street Reform and Consumer Protection Act, the listing requirements of the Nasdaq Global Market and other applicable securities rules and regulations impose various requirements on public companies, including establishment and maintenance of effective disclosure and financial controls and corporate governance practices. Our management and other personnel devote and will need to continue to devote a substantial amount of time to these compliance initiatives. Moreover, these rules and regulations have increased and will continue to increase our legal and financial compliance costs and will make some activities more time-consuming and costly. Any changes we make to comply with these obligations may not be sufficient to allow us to satisfy our obligations as a public company on a timely basis, or at all. These reporting requirements, rules and regulations, coupled with the increase in potential litigation exposure associated with being a public company, could also make it more difficult for us to attract and retain qualified persons to serve on the board of directors or on board committees or to serve as executive officers, or to obtain certain types of insurance, including directors’ and officers’ insurance, on acceptable terms.

Once we are no longer an emerging growth company, a smaller reporting company or otherwise no longer qualify for applicable exemptions, we will be subject to additional laws and regulations affecting public companies that will increase our costs and the demands on management and could harm our operating results.

We are subject to the reporting requirements of the Exchange Act, which requires, among other things, that we file with the SEC, annual, quarterly and current reports with respect to our business and financial condition as well as other disclosure and corporate governance requirements. However, as an emerging growth company we may take advantage of exemptions from various requirements such as an exemption from the requirement to have our independent auditors attest to our internal control over financial reporting under Section 404 of the Sarbanes-Oxley Act of 2002 as well as an exemption from the “say on pay” voting requirements pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010. After we no longer qualify as an emerging growth company, we may still qualify as a “smaller reporting company” which may allow us to take advantage of some of the same exemptions from disclosure requirements including not being required to comply with the auditor attestation requirements of Section 404 of the Sarbanes-Oxley Act and reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements. Once we are no longer an emerging growth company, a smaller reporting company or otherwise qualify for these exemptions, we will be required to comply with these additional legal and regulatory requirements applicable to public companies and will incur significant legal, accounting and other expenses to do so. If we are not able to comply with the requirements in a timely manner or at all, our financial condition or the market price of our common stock may be harmed. For example, if we or our independent auditor identifies deficiencies in our internal control over financial reporting that are deemed to be material weaknesses we could face additional costs to remedy those deficiencies, the market price of our stock could decline or we could be subject to sanctions or investigations by the SEC or other regulatory authorities, which would require additional financial and management resources.

Provisions in our charter documents and under Delaware law could make an acquisition of us more difficult and may discourage any takeover attempts our stockholders may consider favorable, and may lead to entrenchment of management.

Provisions of our amended and restated certificate of incorporation and amended and restated bylaws could delay or prevent changes in control or changes in management without the consent of the board of directors. These provisions will include the following:

•a board of directors divided into three classes serving staggered three-year terms, such that not all members of the board will be elected at one time;

•no cumulative voting in the election of directors, which limits the ability of minority stockholders to elect director candidates;

•a prohibition on stockholder action by written consent, which means that all stockholder action must be taken at an annual or special meeting of the stockholders;

•a requirement that special meetings of stockholders be called only by the chairman of the board of directors, the Chief Executive Officer or by a majority of the total number of authorized directors;

•advance notice requirements for stockholder proposals and nominations for election to the board of directors;

•a requirement that no member of the board of directors may be removed from office by stockholders except for cause and, in addition to any other vote required by law, upon the approval of not less than two-thirds of all outstanding shares of voting stock then entitled to vote in the election of directors;

•a requirement of approval of not less than two-thirds of all outstanding shares of voting stock to amend any bylaws by stockholder action or to amend specific provisions of the certificate of incorporation; and

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•the authority of the board of directors to issue preferred stock on terms determined by the board of directors without stockholder approval and which preferred stock may include rights superior to the rights of the holders of common stock.

In addition, these provisions would apply even if we were to receive an offer that some stockholders may consider beneficial.

We will also be subject to the anti-takeover provisions contained in Section 203 of the DGCL, or Section 203. Under Section 203, a corporation may not, in general, engage in a business combination with any holder of 15% or more of its capital stock unless the holder has held the stock for three years or, among other exceptions, the board of directors has approved the transaction.

Our certificate of incorporation and bylaws provide that the Court of Chancery of the State of Delaware is the exclusive forum for substantially all disputes between us and our stockholders, which could limit our stockholders’ ability to obtain a favorable judicial forum for disputes with us or our directors, officers or other employees.

Our certificate of incorporation and bylaws provide that the Court of Chancery of the State of Delaware is the sole and exclusive forum for any derivative action or proceeding brought on our behalf, any action asserting a breach of fiduciary duty, any action asserting a claim against it arising pursuant to any provisions of the DGCL, our certificate of incorporation or our bylaws, or any action asserting a claim against us that is governed by the internal affairs doctrine. The exclusive forum provision does not apply to actions arising under the Exchange Act. Our amended and restated bylaws also provide that the federal district courts of the United States of America will be the exclusive forum for the resolution of any complaint asserting a cause of action under the Securities Act. The provision may limit a stockholder’s ability to bring a claim in a judicial forum that it finds favorable for disputes with us or our directors, officers or other employees, which may discourage such lawsuits against us and our directors, officers and other employees. Alternatively, if a court were to find the choice of forum provision contained in the certificate of incorporation and bylaws to be inapplicable or unenforceable in an action, we may incur additional costs associated with resolving such action in other jurisdictions, which could materially and adversely affect our business, financial condition and results of operations.

We do not anticipate that we will pay any cash dividends in the foreseeable future.

The current expectation is that we will retain our future earnings, if any, to fund the growth of our business as opposed to paying dividends. As a result, capital appreciation, if any, of our common stock will be your sole source of gain, if any, for the foreseeable future.

An active trading market for our common stock may not be sustained. If an active trading market is not sustained, our ability to raise capital in the future may be impaired.

Given the limited trading history of our common stock, there is a risk that an active trading market for our shares may not be sustained, which could put downward pressure on the market price of our common stock and thereby affect your ability to sell shares you purchased. An inactive trading market for our common stock may also impair our ability to raise capital to continue to fund our operations by selling shares and impair our ability to acquire other companies or technologies by using our shares as consideration.

Future sales of shares by existing stockholders could cause our stock price to decline.

If our existing securityholders sell, or indicate an intention to sell, substantial amounts of our common stock in the public market after legal restrictions on resale discussed in our Annual Report on Form 10-K for the year ended December 31, 2023 lapse, the trading price of our common stock could decline. As of September 30, 2024, we had 29,748,154 shares of common stock outstanding. All outstanding shares of common stock, other than shares held by our affiliates will be freely tradable, without restriction, in the public market. In addition, shares of common stock that are subject to outstanding options of ours will become eligible for sale in the public market to the extent permitted by the provisions of various vesting agreements and Rules 144 and 701 under the Securities Act. If these shares are sold, the trading price of our common stock could decline.

Our executive officers, directors and principal stockholders have the ability to control or significantly influence all matters submitted to our stockholders for approval.

As of September 30, 2024, our executive officers, directors and principal stockholders, in the aggregate, beneficially owned approximately 58% of our outstanding shares of common stock. As a result, if these stockholders were to choose to act together, they would be able to control or significantly influence all matters submitted to our stockholders for approval, as well as our management and affairs. For example, these persons, if they choose to act together, would control or significantly influence the election of directors and approval of any merger, consolidation or sale of all or substantially all of our assets. This concentration of voting power could delay or prevent an acquisition of us on terms that other stockholders may desire.

If equity research analysts do not publish research or reports, or publish unfavorable research or reports, about us, our business or our market, our stock price and trading volume could decline.

The trading market for our common stock will be influenced by the research and reports that equity research analysts publish about us and our business. Equity research analysts may elect not to provide research coverage of our common stock, and such lack

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of research coverage may adversely affect the market price of our common stock. In the event we do have equity research analyst coverage, we will not have any control over the analysts or the content and opinions included in their reports. The price of our common stock could decline if one or more equity research analysts downgrade our stock or issue other unfavorable commentary or research. If one or more equity research analysts ceases coverage of us or fails to publish reports on us regularly, demand for our common stock could decrease, which in turn could cause our stock price or trading volume to decline.

We will have broad discretion in the use of our cash, cash equivalents, and marketable securities and may invest or spend our cash, cash equivalents, and marketable securities in ways with which you do not agree and in ways that may not increase the value of your investment.

We will have broad discretion over the use of our cash, cash equivalents, and marketable securities. You may not agree with our decisions, and our use of our cash, cash equivalents, and marketable securities may not yield any return on your investment. Our failure to apply these resources effectively could compromise our ability to pursue our growth strategy and we might not be able to yield a significant return, if any, on our investment of these net proceeds. You will not have the opportunity to influence our decisions on how to use our cash resources.

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ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

(a) Recent Sales of Unregistered Securities

None.

(b) Use of Proceeds from Initial Public Offering

Not applicable.

(c) Issuer Purchases of Equity Securities

None.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

None.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

ITEM 5. OTHER INFORMATION

The following table discloses any officer (as defined in Rule 16a-1(f) under the Exchange Act) or director who entered into, modified or terminated a Rule 10b5-1 trading arrangement or non-Rule 10b5-1 trading arrangement (as such terms are defined in Item 408 of Regulation S-K) during the three months ended September 30, 2024:

Name and Title	Type of Trading Arrangement	Action Taken (Date of Action)	Duration or End Date	Aggregate Number of Securities to be Sold	Description of Trading Arrangement
John Quisel, J.D., Ph.D. President, Chief Executive Officer, and Director	Trading plan intended to satisfy the affirmative defense conditions of Securities Exchange Act Rule 10b5-1(c)	Adoption (July 2, 2024)	End Date (April 15, 2025)	Up to 45,623	Sale
William Savage, M.D., Ph.D. Chief Medical Officer	Trading plan intended to satisfy the affirmative defense conditions of Securities Exchange Act Rule 10b5-1(c)	Adoption (July 18, 2024)	End Date (December 1, 2024)	Up to 23,341	Sale
Rahul Khara, Pharm.D., J.D. General Counsel and Secretary	Trading plan intended to satisfy the affirmative defense conditions of Securities Exchange Act Rule 10b5-1(c)	Adoption (September 25, 2024)	End Date (February 28, 2025)	Up to 15,000	Sale

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ITEM 6. EXHIBITS.

The exhibits filed as part of this Quarterly Report are set forth on the Exhibit Index, which is incorporated herein by reference.

EXHIBIT INDEX

Exhibit Number	Description
2.1†	Agreement and Plan of Merger and Reorganization, dated as of August 9, 2022, by and among Gemini Therapeutics, Inc. Gemstone Merger Sub, Inc. and Disc Medicine, Inc. (incorporated by reference to Exhibit 2.1 to the Registrant’s Proxy Statement/Prospectus on Form S-4 (File No. 333-267276) filed on September 2, 2022).
3.1	Amended and Restated Certificate of Incorporation of Disc Medicine, Inc. (incorporated by reference to Annex B to Gemini Therapeutics, Inc.’s Proxy Statement/Prospectus on Form S-4/A (File No. 333-249785)).
3.2	Certificate of Amendment to the Amended and Restated Certificate of Incorporation of Disc Medicine, Inc., dated December 28, 2022 (incorporated by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K (File No. 001-39438) filed on December 29, 2022).
3.3	Certificate of Amendment to the Amended and Restated Certificate of Incorporation of Disc Medicine, Inc., dated December 29, 2022 (incorporated by reference to Exhibit 3.2 to the Registrant’s Current Report on Form 8-K (File No. 001-39438) filed on December 29, 2022).
3.4	Amended and Restated By-laws of Disc Medicine, Inc. (incorporated by reference to Annex C to Gemini Therapeutics, Inc.’s Proxy Statement/Prospectus on Form S-4/A (File No. 333-249785)).
10.1*	Second Amendment to Lease by and between Disc Medicine, Inc. and ARE-MA Region No. 75. LLC, dated August 29, 2024.
10.2††+	Loan and Security Agreement, dated as of November 6, 2024, by and among Disc Medicine, Inc., the other Borrower party thereto, the Lenders party thereto, and Hercules Capital, Inc., as Agent (incorporated by reference to Exhibit 10.1 to the Registrant's Current Report on Form 8-K (File No. 001-39438) filed on November 8, 2024).
31.1*	Certification of Principal Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2*	Certification of Principal Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1**	Certification of Principal Executive Officer and Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS	Inline XBRL Instance Document
101.SCH	Inline XBRL Taxonomy Extension Schema With Embedded Linkbase Documents
104	Cover Page Interactive Data File (embedded within the Inline XBRL document)

* Filed herewith.

** The certifications furnished in Exhibit 32.1 hereto are deemed to be furnished with this Quarterly Report on Form 10-Q and will not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, except to the extent that the Registrant specifically incorporates it by reference.

† The annexes, schedules, and certain exhibits to the Merger Agreement have been omitted pursuant to Item 601(b)(2) of Regulation S-K. The Registrant hereby agrees to furnish supplementally a copy of any omitted annex, schedule or exhibit to the Commission upon request.

†† Certain of the exhibits and schedules to the Loan and Security Agreement have been omitted pursuant to Item 601(a)(5) of Regulation S-K. The Registrant hereby agrees to furnish supplementally a copy of any omitted schedule or exhibit to the Commission upon request.

+ Portions of this exhibit are redacted in accordance with Item 601(b)(10)(iv) of Regulation S-K.

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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	DISC MEDICINE, INC.
Date: November 12, 2024	By:	/s/ John Quisel
		John Quisel, J.D., Ph.D.
		President and Chief Executive Officer (Principal Executive Officer)
Date: November 12, 2024	By:	/s/ Jean Franchi
		Jean Franchi
		Chief Financial Officer (Principal Financial and Accounting Officer)

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EX-10.1

Exhibit 10.1

SECOND AMENDMENT TO LEASE

THIS SECOND AMENDMENT TO LEASE (this “Second Amendment”) is dated as of August 29, 2024 and effective as of July 1, 2024 (the “Effective Date”), by and between ARE-MA REGION NO. 75, LLC, a Delaware limited liability company (“Landlord”), and DISC MEDICINE, INC., a Delaware corporation (“Tenant”).

RECITALS

A. Landlord and Tenant are now parties to that certain Lease Agreement dated as of October 29, 2021, as amended by that certain First Amendment to Lease (the “First Amendment”) dated as of June 21, 2023 (as amended, the “Lease”). Pursuant to the Lease, Tenant leases certain premises containing approximately 7,566 rentable square feet commonly known as Suite 101 (the “Original Premises”) in that certain building located at 321 Arsenal Street, Watertown, Massachusetts (also known as Building 312) (the “Building”), as more particularly described in the Lease. Capitalized terms used herein without definition shall have the meanings given to such terms in the Lease.

B. Tenant is also currently occupying certain premises located on the second floor of the Building, commonly known as Suite 201, containing approximately 9,281 rentable square feet (the “Expansion Premises”), pursuant to that certain Sublease dated as of June 8, 2023 (the “Forma Sublease”) by and between Tenant, as subtenant, and Forma Therapeutics, Inc., as sublandlord.

C. Both the Term of the Lease and the term of the Forma Sublease are scheduled to expire on November 30, 2026.

D. Landlord and Tenant desire, subject to the terms and conditions set forth below, to amend the Lease to, among other things, (i) expand the Original Premises to include the Expansion Premises, and (ii) extend the Term for a period of 66 months commencing on July 1, 2024 (the “Extension Term Commencement Date”) through December 31, 2029 (the “Second Amendment Expiration Date”).

NOW, THEREFORE, in consideration of the foregoing Recitals, which are incorporated herein by this reference, the mutual promises and conditions contained herein, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, Landlord and Tenant hereby agree as follows:

1.Expansion Premises; Delivery; Expansion Premises Commencement Date. In addition to the Original Premises, commencing on the Expansion Premises Commencement Date, Landlord leases to Tenant, and Tenant leases from Landlord, the Expansion Premises. The “Expansion Premises Commencement Date” shall be the earlier to occur of (i) December 1, 2026 and (ii) if the Forma Sublease terminates prior to November 30, 2026, the first calendar day following the date that the Forma Sublease terminates. The “Expansion PremisesRent Commencement Date” shall be the date that is four (4) months following the Expansion Premises Commencement Date. The period commencing on the Expansion Premises Commencement Date through the day immediately preceding the Expansion Premises Rent Commencement Date may be referred to herein as the “Abatement Period.”

Tenant’s occupancy of the Expansion Premises shall be on an “as-is” basis and, except as otherwise expressly provided in Section 8 below, Landlord shall have no obligation to provide any tenant improvement allowance or make any alterations to the Expansion Premises.

Except as set forth in this Second Amendment and subject to Landlord’s repair and maintenance obligations under Section 13 of the Lease: (i) Tenant shall accept the Expansion Premises in their condition as of the Expansion Premises Commencement Date; (ii) Landlord shall have no obligation for any defects in the Expansion Premises; and (iii) Tenant’s taking possession of the Expansion Premises shall be conclusive evidence that Tenant accepts the Expansion Premises.

Tenant agrees and acknowledges that, except as otherwise expressly set forth in this Second Amendment, neither Landlord nor any agent of Landlord has made any representation or warranty with respect to the condition of all or any portion of the Expansion Premises, and/or the suitability of the Expansion Premises for the conduct of Tenant’s business, and Tenant waives any implied warranty that the Expansion Premises are suitable for Tenant’s use.

2.Premises. As of the Expansion Premises Commencement Date, the definitions of “Premises” and “Rentable Area of Premises” on page 1 of the Lease are hereby deleted in their entirety and replaced with the following:

“Premises: Approximately 16,847 rentable square feet in the Building consisting of (i) a portion of the first floor commonly known as Suite 101, containing approximately 7,566 rentable square feet (the "Original Premises"), and (ii) a portion of the second floor commonly known as Suite 201, containing approximately 9,281 rentable square feet (the "Expansion Premises"), all as determined by Landlord as shown on Exhibit A.”

“Rentable Area of Premises: 16,847 rentable sq. ft."

As of the Expansion Premises Commencement Date, Exhibit A to the Lease is hereby amended to include Exhibit A attached to this Second Amendment.

3.Base Rent.

a.Original Premises. Commencing on the Extension Term Commencement Date, Tenant shall pay Base Rent with respect to the Original Premises in the amount of $45.00 per rentable square foot of the Original Premises per year. On July 1, 2025, and on each July 1st thereafter (each, an "Adjustment Date"), the Base Rent payable with respect to the Original Premises shall be increased by multiplying the Base Rent payable immediately before such Adjustment Date by 3% and adding the resulting amount to the Base Rent payable with respect to the Original Premises immediately before such Adjustment Date. Notwithstanding anything contained in the Lease to the contrary, so long as Tenant is not in Default under the Lease, Base Rent for the Original Premises shall be abated for the period commencing on December 1, 2026 through March 31, 2027.

Upon execution of this Second Amendment, Tenant shall receive a credit towards the next monthly payment of Base Rent due for the Original Premises equal to the portion by which the monthly Base Rent actually paid by Tenant for the month of July 2024, and if applicable the month of August 2024, exceeded the monthly Base Rent due hereunder as set forth in the first sentence of this Section 3(a).

b.Expansion Premises. Commencing on the Expansion Premises Rent Commencement Date, Tenant shall pay Base Rent for the Expansion Premises at the same per rentable square foot rate that Tenant is then paying with respect to the Original Premises, as adjusted pursuant to subsection 3(a) above; provided, however, if the Forma Sublease terminates prior to November 30, 2026, such that the Expansion Premises Rent Commencement Date occurs prior to December 1, 2026, then Tenant shall pay Base Rent for the Expansion Premises at the same per rentable square foot rate set forth in the Forma Sublease through November 30, 2026, and thereafter on December 1, 2026, the Base Rent for the Expansion Premises shall then adjust to the same per rentable square foot rate as the Original Premises as provided for in this Section 3(b).

4.Operating Expenses. As of the Expansion Premises Commencement Date, the definition of "Tenant's Share of Operating Expenses" on page 1 of the Lease is hereby deleted in its entirety and replaced with the following:

"Tenant's Share of Operating Expenses: 25.98%, subject to adjustment from time to time in accordance with Sections 5 and 45(o) hereof."

2

5.Security Deposit. Commencing on the Expansion Premises Commencement Date the defined term “Security Deposit” on Page 1 of the Lease is deleted in its entirely and replaced with the following:

“Security Deposit: $255,227"

Landlord currently holds a Security Deposit in the amount of $116,012 under the Lease. As contemplated by the First Amendment, within 30 days before the Expansion Premises Commencement Date, Tenant shall deliver to Landlord an amended Letter of Credit which increases the amount of the existing Letter of Credit being held by Landlord to $255,227 or an additional Letter of Credit in the amount of $139,215

6.Parking. Subject to the terms and conditions of Section 10 of the Lease, and in addition to the parking rights granted to Tenant thereunder with respect to the Original Premises, commencing on the Expansion Premises Commencement Date, Tenant shall have the right to park at a rate of 2.0 cars per 1,000 rentable square feet of the Expansion Premises.

7.Extension of Term. The Term of the Lease will expire with respect to both the Original Premises and the Expansion Premises on the Second Amendment Expiration Date.

8.Tenant Improvements. Landlord shall make available to Tenant a tenant improvement allowance in the maximum amount of $842,350 ($50.00 per rentable square foot of the Original Premises and Expansion Premises) (the “TI Allowance”), for the design and construction of fixed and permanent improvements desired by and performed by Tenant and reasonably acceptable to Landlord in the Original Premises and Expansion Premises (collectively, the “Tenant Improvements”), which Tenant Improvements shall be constructed pursuant to a scope of work and plans reasonable acceptable to Landlord and Tenant. The TI Allowance shall be available only for hard and soft costs of construction of the Tenant Improvements, including, but not limited to, architectural and engineering fees, data/telecom cabling and furniture reasonably acceptable to Landlord. The Tenant Improvements shall be treated as Alterations and shall be undertaken pursuant to Section 12 of the Lease. The contractor for the Tenant Improvements shall be selected by Tenant, subject to Landlord’s approval, which approval shall not be unreasonably withheld, conditioned or delayed. Prior to the commencement of the Tenant Improvements, Tenant shall deliver to Landlord a copy of any contract with Tenant’s contractors, and certificates of insurance from any contractor performing any part of the Tenant Improvements evidencing industry standard commercial general liability, automotive liability, “builder’s risk”, and workers’ compensation insurance. Tenant shall cause the general contractor to provide a certificate of insurance naming Landlord, Alexandria Real Estate Equities, Inc., as additional insureds for the general contractor’s liability coverages required above.

During the course of the design and construction of the Tenant Improvements, Landlord shall reimburse Tenant for the cost of the Tenant Improvements once a month against a reasonable form of draw request, containing evidence of payment of the applicable costs and such certifications, lien waivers (including a conditional lien release for each progress payment and unconditional lien releases for the prior month’s progress payments), inspection reports and other matters as Landlord customarily obtains, to the extent of Landlord’s approval thereof for payment, no later than 30 days following receipt of such draw request. Upon completion of the Tenant Improvements (and prior to any final disbursement of the TI Allowance) Tenant shall deliver to Landlord the following items: (i) sworn statements setting forth the names of all contractors and subcontractors who did work on the Tenant Improvements and final lien waivers from all such contractors and subcontractors; and (ii) if applicable, “as built” plans for the Tenant Improvements. Tenant acknowledges that upon the expiration of the Term of the Lease, the Tenant Improvements shall become the property of Landlord and may not be removed by Tenant. Tenant shall pay Landlord a supervisory fee in the amount of 1% of the total cost of the Tenant Improvements, which sum shall be payable from the TI Allowance. Except for the TI Allowance, Tenant shall be solely responsible for all of the costs of the Tenant Improvements. If the estimated cost of the Tenant

3

Improvements exceeds the TI Allowance, Tenant shall be required to pay such excess on a pari passu basis with the remaining portion of the TI Allowance, with a reconciliation to be conducted within thirty (30) days following the completion of the Tenant Improvements. Tenant shall have no right to any portion of the TI Allowance that is not disbursed before the last day of the month that is 24 months after the Effective Date of this Second Amendment (the “Outside Improvements Allowance Date”). Any portion of the TI Allowance which has not been disbursed before the Outside Improvements Allowance Date shall be forfeited and shall not be available for use by Tenant.

9.Right to Extend. Tenant shall continue to have one (1) five-year option to extend the Term of the Lease with respect to the entire Premises in accordance with the terms of Section 40 of the Lease

10.Tenant’s Notice Address. As of the Effective Date of this Second Amendment, Tenant’s notice address under the Lease shall be as follows:

Disc Medicine, Inc.
321 Arsenal Street, Suite 101
Watertown, MA 02472
Attn: Jean Franchi

11.OFAC. Tenant and all beneficial owners of Tenant are currently (a) in compliance with and shall at all times during the Term of the Lease remain in compliance with the regulations of the Office of Foreign Assets Control (“OFAC”) of the U.S. Department of Treasury and any statute, executive order, or regulation relating thereto (collectively, the “OFAC Rules”), (b) not listed on, and shall not during the term of the Lease be listed on, the Specially Designated Nationals and Blocked Persons List, Foreign Sanctions Evaders List, or the Sectoral Sanctions Identification List, which are all maintained by OFAC and/or on any other similar list maintained by OFAC or other governmental authority pursuant to any authorizing statute, executive order, or regulation, and (c) not a person or entity with whom a U.S. person is prohibited from conducting business under the OFAC Rules.

12.Brokers. Landlord and Tenant each represents and warrants that it has not dealt with any broker, agent or other person (collectively, “Broker”) in connection with the transaction reflected in this Second Amendment and that no Broker brought about this transaction, other than JLL and CBRE. Landlord and Tenant each hereby agrees to indemnify and hold the other harmless from and against any claims by any Broker, other than JLL and CBRE, claiming a commission or other form of compensation by virtue of having dealt with Tenant or Landlord, as applicable, with regard to this Second Amendment.

13.Miscellaneous.

a.This Second Amendment is the entire agreement between the parties with respect to the subject matter hereof and supersedes all prior and contemporaneous oral and written agreements and discussions. This Second Amendment may be amended only by an agreement in writing, signed by the parties hereto.

b.This Second Amendment is binding upon and shall inure to the benefit of the parties hereto, and their respective successors and assigns.

c.This Second Amendment may be executed in 2 or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument. Counterparts may be delivered via facsimile, electronic mail (including pdf or any electronic signature process complying with the U.S. federal ESIGN Act of 2000) or other transmission method and any counterpart so delivered shall be deemed to have been duly and validly delivered and be valid and effective for all purposes. Electronic signatures shall be deemed original

4

signatures for purposes of this Second Amendment and all matters related thereto, with such electronic signatures having the same legal effect as original signatures.

d.Except as amended and/or modified by this Second Amendment, the Lease is hereby ratified and confirmed and all other terms of the Lease shall remain in full force and effect, unaltered and unchanged by this Second Amendment. In the event of any conflict between the provisions of this Second Amendment and the provisions of the Lease, the provisions of this Second Amendment shall prevail. Whether or not specifically amended by this Second Amendment, all of the terms and provisions of the Lease are hereby amended to the extent necessary to give effect to the purpose and intent of this Second Amendment.

[Signatures are on the next page]

5

IN WITNESS WHEREOF, the parties hereto have executed this Second Amendment as of the day and year first above written.

TENANT:

DISC MEDICINE, INC.,

a Delaware corporation

By: /s/ Jean Franchi
Name: Jean Franchi
Title: Chief Finance Officer

□ I hereby certify that the signature, name, and title
above are my signature, name and title.

LANDLORD:

ARE-MA REGION NO. 75, LLC,

a Delaware limited liability company

By: ALEXANDRIA REAL ESTATE EQUITIES, L.P.,

a Delaware limited partnership,

managing member

By: ARE-QRS CORP.,

a Maryland corporation,

general partner

By: /s/ Allison Grochola
Name: Allison Grochola
Title: SVP – Real Estate Legal Affairs

6

Exhibit A

Expansion Premises

A-1

EX-31.1

Exhibit 31.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER PURSUANT TO

RULE 13A-14(A) / RULE 15D-14(A) OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED

I, John Quisel, J.D., Ph.D., certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of Disc Medicine, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 12, 2024

/s/ John Quisel

John Quisel, J.D., Ph.D.

President and Chief Executive Officer

(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER PURSUANT TO

RULE 13A-14(A) / RULE 15D-14(A) OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED

I, Jean Franchi, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of Disc Medicine, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 12, 2024

/s/ Jean Franchi

Jean Franchi

Chief Financial Officer

(Principal Financial and Accounting Officer)

EX-32.1

Exhibit 32.1

CERTIFICATIONS OF PRINCIPAL EXECUTIVE OFFICER AND PRINCIPAL

FINANCIAL OFFICER PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with this Quarterly Report on Form 10-Q of Disc Medicine, Inc. (the “Company”) for the quarter ended September 30, 2024 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned officers hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of his or her knowledge:

1.the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: November 12, 2024

/s/ John Quisel

John Quisel, J.D., Ph.D.

President and Chief Executive Officer

(Principal Executive Officer)

/s/ Jean Franchi

Jean Franchi

Chief Financial Officer

(Principal Financial and Accounting Officer)

XML

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2024	Nov. 07, 2024
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2024
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
Trading Symbol	IRON
Entity Registrant Name	Disc Medicine, Inc.
Entity Central Index Key	0001816736
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Shell Company	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Common Stock, Shares Outstanding		29,757,732
Entity File Number	001-39438
Entity Tax Identification Number	85-1612845
Entity Address, Address Line One	321 Arsenal Street, Suite 101
Entity Address, City or Town	Watertown
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02472
City Area Code	617
Local Phone Number	674-9274
Entity Incorporation, State or Country Code	DE
Title of 12(b) Security	Common Stock, $0.0001 Par Value
Security Exchange Name	NASDAQ
Document Quarterly Report	true
Document Transition Report	false

XML

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 192,638	$ 360,382
Marketable securities	294,725	0
Prepaid expenses and other current assets	5,789	5,280
Total current assets	493,152	365,662
Property and equipment, net	79	170
Right-of-use assets, operating leases	1,678	1,930
Other assets	236	234
Total assets	495,145	367,996
Current liabilities:
Accounts payable	3,553	12,629
Accrued external research and development expenses	16,332	1,986
Other accrued expenses	5,512	6,159
Operating lease liabilities, current	76	665
Total current liabilities	25,473	21,439
Operating lease liabilities, non-current	1,712	1,436
Total liabilities	27,185	22,875
Commitments and contingencies (Note 14)
Stockholders' equity:
Common stock, $0.0001 par value; 100,000,000 shares authorized as of September 30, 2024 and December 31, 2023; 29,748,154 and 24,360,233 shares issued outstanding as of September 30, 2024 and December 31, 2023, respectively	3	2
Additional paid-in capital	735,761	533,764
Accumulated other comprehensive income	741	0
Accumulated deficit	(268,545)	(188,645)
Total stockholders' equity	467,960	345,121
Total liabilities and stockholders equity	$ 495,145	$ 367,996

XML

Condensed Consolidated Balance Sheets (Parentheticals) - $ / shares	Sep. 30, 2024	Dec. 31, 2023
Common stock, par value (in Dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	29,748,154	24,360,233
Common stock, shares outstanding	29,748,154	24,360,233

XML

Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Operating expenses:
Research and development expense	$ 24,685	$ 14,419	$ 71,874	$ 46,699
General and administrative	8,171	4,539	23,296	14,712
Total operating expenses	32,856	18,958	95,170	61,411
Loss from operations	(32,856)	(18,958)	(95,170)	(61,411)
Other income (expense), net:
Interest income	6,362	4,843	15,454	10,120
Change in fair value of contingent value right liability	0	0	0	(1,500)
Other income (expense)	9	13	(5)	8
Total other income (expense), net	6,371	4,856	15,449	8,628
Loss before income taxes	(26,485)	(14,102)	(79,721)	(52,783)
Income tax expense	(114)	(20)	(179)	(67)
Net loss	(26,599)	(14,122)	(79,900)	(52,850)
Net loss attributable to common stockholders-basic	(26,599)	(14,122)	(79,900)	(52,850)
Net loss attributable to common stockholders-diluted	$ (26,599)	$ (14,122)	$ (79,900)	$ (52,850)
Weighted-average common shares outstanding-basic	29,935,551	24,316,817	26,809,605	21,605,202
Weighted-average common shares outstanding-diluted	29,935,551	24,316,817	26,809,605	21,605,202
Net loss per share attributable to common stockholders-basic	$ (0.89)	$ (0.58)	$ (2.98)	$ (2.45)
Net loss per share attributable to common stockholders-diluted	$ (0.89)	$ (0.58)	$ (2.98)	$ (2.45)
Comprehensive loss:
Net loss	$ (26,599)	$ (14,122)	$ (79,900)	$ (52,850)
Other comprehensive income:
Foreign currency translation adjustments	(48)	0	(42)	0
Unrealized gain on marketable securities	849	0	783	0
Total other comprehensive income	801	0	741	0
Comprehensive loss	$ (25,798)	$ (14,122)	$ (79,159)	$ (52,850)

XML

Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Deficit [Member]
Balance at Dec. 31, 2022	$ 176,600	$ 2	$ 288,814		$ (112,216)
Balance (in Shares) at Dec. 31, 2022		17,403,315
Issuance of common stock upon exercise of stock options	1,067		1,067
Issuance of common stock upon exercise of stock options (in Shares)		74,753
Vesting of restricted common stock (in Shares)		958
Stock-based compensation expense	1,024		1,024
Sale of common stock in registered direct offering	34,148		34,148
Sale of common stock in registered direct offering, (in shares)		1,488,166
Sale of pre-funded warrants in registered direct offering	28,206		28,206
Sale of common stock in at-the-market offerings	14,591		14,591
Sale of common stock in at-the-market offerings, (in shares)		608,050
Net loss	(22,781)				(22,781)
Balance at Mar. 31, 2023	232,855	$ 2	367,850		(134,997)
Balance (in Shares) at Mar. 31, 2023		19,575,242
Balance at Dec. 31, 2022	176,600	$ 2	288,814		(112,216)
Balance (in Shares) at Dec. 31, 2022		17,403,315
Foreign currency translation adjustments	$ 0
Issuance of common stock upon exercise of warrants	1,229,221
Net loss	$ (52,850)
Balance at Sep. 30, 2023	358,974	$ 2	524,038		(165,066)
Balance (in Shares) at Sep. 30, 2023		24,139,078
Balance at Mar. 31, 2023	232,855	$ 2	367,850		(134,997)
Balance (in Shares) at Mar. 31, 2023		19,575,242
Issuance of common stock upon exercise of stock options	242		242
Issuance of common stock upon exercise of stock options (in Shares)		41,475
Vesting of restricted common stock (in Shares)		958
Stock-based compensation expense	1,309		1,309
Sale of common stock in follow on public offering, Shares		3,015,919
Sale of common stock in In follow on public offering	138,508		138,508
Sale of pre-funded warrants in follow-on public offering	9,373		9,373
Sale of common stock in at-the-market offerings	4,879		4,879
Sale of common stock in at-the-market offerings, (in shares)		217,300
Net loss	(15,947)				(15,947)
Balance at Jun. 30, 2023	371,219	$ 2	522,161		(150,944)
Balance (in Shares) at Jun. 30, 2023		22,850,894
Issuance of common stock upon exercise of stock options	607		607
Issuance of common stock upon exercise of stock options (in Shares)		58,963
Stock-based compensation expense	1,270		1,270
Foreign currency translation adjustments	0
Issuance of common stock upon exercise of warrants		1,229,221
Net loss	(14,122)				(14,122)
Balance at Sep. 30, 2023	358,974	$ 2	524,038		(165,066)
Balance (in Shares) at Sep. 30, 2023		24,139,078
Balance at Dec. 31, 2023	345,121	$ 2	533,764		(188,645)
Balance (in Shares) at Dec. 31, 2023		24,360,233
Issuance of common stock upon exercise of stock options	806		806
Issuance of common stock upon exercise of stock options (in Shares)		95,467
Stock-based compensation expense	4,058		4,058
Sale of common stock in at-the-market offerings	14,790		14,790
Sale of common stock in at-the-market offerings, (in shares)		234,449
Issuance of common stock under employee stock purchase plan	245		245
Issuance of common stock under employee stock purchase plan (in shares)		5,736
Net loss	(26,949)				(26,949)
Balance at Mar. 31, 2024	338,071	$ 2	553,663		(215,594)
Balance (in Shares) at Mar. 31, 2024		24,695,885
Balance at Dec. 31, 2023	$ 345,121	$ 2	533,764		(188,645)
Balance (in Shares) at Dec. 31, 2023		24,360,233
Issuance of common stock upon exercise of stock options (in Shares)	198,390
Foreign currency translation adjustments	$ (42)
Net loss	(79,900)
Balance at Sep. 30, 2024	467,960	$ 3	735,761	$ 741	(268,545)
Balance (in Shares) at Sep. 30, 2024		29,748,154
Balance at Mar. 31, 2024	338,071	$ 2	553,663		(215,594)
Balance (in Shares) at Mar. 31, 2024		24,695,885
Issuance of common stock upon exercise of stock options	567		567
Issuance of common stock upon exercise of stock options (in Shares)		68,112
Stock-based compensation expense	4,091		4,091
Sale of common stock in registered direct offering	172,512	$ 1	172,511
Sale of common stock in registered direct offering, (in shares)		4,944,000
Foreign currency translation adjustments	6			6
Unrealized gain on marketable securities	(66)			(66)
Net loss	(26,352)				(26,352)
Balance at Jun. 30, 2024	488,829	$ 3	730,832	(60)	(241,946)
Balance (in Shares) at Jun. 30, 2024		29,707,997
Issuance of common stock upon exercise of stock options	401		401
Issuance of common stock upon exercise of stock options (in Shares)		34,811
Stock-based compensation expense	4,332		4,332
Foreign currency translation adjustments	(48)			(48)
Unrealized gain on marketable securities	(849)			(849)
Issuance of common stock under employee stock purchase plan	196		196
Issuance of common stock under employee stock purchase plan (in shares)		5,346
Net loss	(26,599)				(26,599)
Balance at Sep. 30, 2024	$ 467,960	$ 3	$ 735,761	$ 741	$ (268,545)
Balance (in Shares) at Sep. 30, 2024		29,748,154

XML

Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023
Common stock in registered direct offering, net of issuance costs	$ 5,472			$ 80
Pre-funded warrants in registered direct offering, net of issuance costs				66
Common stock in follow on public offering, net of issuance costs			$ 9,272
Pre-funded warrants in follow on public offering, net of issuance costs			627
Common stock in at-the-market offerings, net of issuance costs		$ 518	$ 119	$ 408

XML

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash flows from operating activities:
Net Income (Loss)	$ (79,900)	$ (52,850)
Adjustments to reconcile net loss to net cash used in operations:
Depreciation and amortization	147	75
Stock-based compensation	12,481	3,603
Amortization/ accretion of investment securities	(3,092)	0
Change in fair value of contingent value right liability	0	1,500
Noncash lease expense	324	180
Other non-cash items	(42)	0
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(509)	341
Accounts payable	(9,076)	(7,710)
Accrued external research and development expenses	14,346	132
Other accrued expenses	(647)	(849)
Operating lease liabilities	(385)	(88)
Net cash used in operating activities	(66,353)	(55,666)
Cash flows from investing activities:
Purchases of property and equipment	(56)	(86)
Purchases of marketable securities	(313,850)	0
Maturities of marketable securities	23,000	0
Net cash used in investing activities	(290,906)	(86)
Cash flows from financing activities:
Proceeds from sale of common stock in offerings, net of issuance costs paid	172,512	192,126
Proceeds from sale of pre-funded warrants in offerings, net of issuance costs paid	0	37,579
Proceeds from sale of common stock in at-the-market offerings, net of issuance costs paid	14,790	0
Proceeds from stock option exercises	1,774	1,916
Contributions from employee stock purchase plan	441	0
Net cash provided by financing activities	189,517	231,621
Net (decrease) increase in cash, cash equivalents and restricted cash	(167,742)	175,869
Cash, cash equivalents and restricted cash, beginning of period	360,616	194,788
Cash, cash equivalents and restricted cash, end of period	192,874	370,657
Supplemental cash flow information
Cash paid for income taxes	37	78
Supplemental disclosure of non-cash activities
Right-of-use assets obtained in exchange for new operating lease liabilities	0	1,106
Net increase (decrease) in right-of-use assets related to lease modifications and reassessment events	72	(422)
Net increase (decrease) in operating lease liabilities related to lease modifications and reassessment events	72	(392)
Deferred issuance costs on sale of common stock and pre-funded warrants in offerings included in accounts payable and accrued expenses	$ 0	$ 215

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Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Pay vs Performance Disclosure
Net Income (Loss)	$ (26,599)	$ (26,352)	$ (26,949)	$ (14,122)	$ (15,947)	$ (22,781)	$ (79,900)	$ (52,850)

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Insider Trading Arrangements

3 Months Ended

Sep. 30, 2024

shares

Trading Arrangements, by Individual

Material Terms of Trading Arrangement

The following table discloses any officer (as defined in Rule 16a-1(f) under the Exchange Act) or director who entered into, modified or terminated a Rule 10b5-1 trading arrangement or non-Rule 10b5-1 trading arrangement (as such terms are defined in Item 408 of Regulation S-K) during the three months ended September 30, 2024:

Name and Title	Type of Trading Arrangement	Action Taken (Date of Action)	Duration or End Date	Aggregate Number of Securities to be Sold	Description of Trading Arrangement
John Quisel, J.D., Ph.D. President, Chief Executive Officer, and Director	Trading plan intended to satisfy the affirmative defense conditions of Securities Exchange Act Rule 10b5-1(c)	Adoption (July 2, 2024)	End Date (April 15, 2025)	Up to 45,623	Sale
William Savage, M.D., Ph.D. Chief Medical Officer	Trading plan intended to satisfy the affirmative defense conditions of Securities Exchange Act Rule 10b5-1(c)	Adoption (July 18, 2024)	End Date (December 1, 2024)	Up to 23,341	Sale
Rahul Khara, Pharm.D., J.D. General Counsel and Secretary	Trading plan intended to satisfy the affirmative defense conditions of Securities Exchange Act Rule 10b5-1(c)	Adoption (September 25, 2024)	End Date (February 28, 2025)	Up to 15,000	Sale

Rule 10b5-1 Arrangement Terminated

false

Non-Rule 10b5-1 Arrangement Terminated

false

Rule 10b5-1 Arrangement Modified

false

Non-Rule 10b5-1 Arrangement Modified

false

John Quisel [Member]

Trading Arrangements, by Individual

Name

John Quisel

Title

President, Chief Executive Officer, and Director

Rule 10b5-1 Arrangement Adopted

true

Adoption Date

July 2, 2024

Expiration Date

April 15, 2025

Arrangement Duration

287 days

Aggregate Available

45,623

William Savage [Member]

Trading Arrangements, by Individual

Name

William Savage

Title

Chief Medical Officer

Rule 10b5-1 Arrangement Adopted

true

Adoption Date

July 18, 2024

Expiration Date

December 1, 2024

Arrangement Duration

136 days

Aggregate Available

23,341

Rahul Khara [Member]

Trading Arrangements, by Individual

Name

Rahul Khara

Title

General Counsel and Secretary

Rule 10b5-1 Arrangement Adopted

true

Adoption Date

September 25, 2024

Expiration Date

February 28, 2025

Arrangement Duration

156 days

Aggregate Available

15,000

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Organization and Nature of the Business

9 Months Ended

Sep. 30, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Nature of the Business

1. Organization and Nature of the Business

Disc Medicine, Inc. (together with its subsidiaries, the “Company”) is a clinical-stage biopharmaceutical company focused on the discovery, development, and commercialization of novel treatments for patients suffering from serious hematologic diseases. The Company has assembled a portfolio of clinical and preclinical product candidates that aim to modify fundamental biological pathways associated with the formation and function of red blood cells, specifically heme biosynthesis and iron homeostasis. The Company’s current pipeline includes bitopertin for the treatment of erythropoietic porphyrias (“EPs”) including erythropoietic protoporphyria (“EPP”), X-linked protoporphyria (“XLP”), and Diamond-Blackfan Anemia (“DBA”); DISC-0974 for the treatment of anemia of myelofibrosis (“MF”) and anemia of chronic kidney disease (“CKD”); and DISC-3405 for the treatment of polycythemia vera (“PV”) and other hematologic disorders. In addition, the Company’s preclinical programs include DISC-0998 for the treatment of anemia associated with inflammatory diseases. The Company’s approach to product candidate development leverages well-understood molecular mechanisms that have been validated in humans. The Company believes that each of its product candidates, if approved, has the potential to improve the lives of patients suffering from hematologic diseases. The Company was founded in October 2017. The Company’s principal offices are in Watertown, Massachusetts.

The Company is subject to a number of risks and uncertainties common to development stage companies in the biotechnology industry, including, but not limited to, risks associated with completing preclinical studies and clinical trials, receiving regulatory approvals for product candidates, development by competitors of new biopharmaceutical products, dependence on key personnel, reliance on third-party organizations, protection of proprietary technology, compliance with government regulations, the impact of public health crises such as pandemics and the ability to secure additional capital to fund operations. The Company’s research and development programs will require significant additional research and development efforts, including preclinical and clinical testing and regulatory approval, prior to commercialization. Even if the Company’s product development efforts are successful, it is uncertain when, if ever, the Company will realize revenue from product sales.

Liquidity and Capital Resources

The Company’s condensed consolidated financial statements have been prepared on the basis of the Company continuing as a going concern. The Company expects that its existing cash, cash equivalents, and marketable securities as of September 30, 2024 of $487.4 million will enable the Company to fund its planned operating expense and capital expenditure requirements for at least twelve months from the date of issuance of these condensed consolidated financial statements. The Company has incurred recurring losses and negative cash flows from operations since inception. As of September 30, 2024, the Company had an accumulated deficit of $268.5 million. The Company expects its operating losses and negative operating cash flows to continue into the foreseeable future. The future viability of the Company is dependent on its ability to generate cash from operating activities or to raise additional capital to finance its operations. There can be no assurance that the Company will ever earn revenues or achieve profitability, or if achieved, that the revenues or profitability will be sustained on a continuing basis. In addition, the Company’s preclinical and clinical development activities, manufacturing and commercialization of the Company’s product candidates, if approved, will require significant additional financing.

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Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2024

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

2. Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

The significant accounting policies used in preparation of the condensed consolidated financial statements are described in the Company’s audited consolidated financial statements as of and for the year ended December 31, 2023 and the notes thereto, which are included in the Company’s Annual Report on Form 10-K.

Basis of Presentation and Principles of Consolidation

The accompanying condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation.

The Company’s condensed consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles (“GAAP”). Any reference in these notes to applicable guidance is meant to refer to the authoritative accounting principles generally accepted in the United States as found in the Accounting Standard Codification (“ASC”) and Accounting Standards Updates (“ASU”) of the Financial Accounting Standards Board (“FASB”).

Unaudited Interim Condensed Consolidated Financial Information

The accompanying condensed consolidated financial statements as of September 30, 2024 and for the three and nine months ended September 30, 2024 and 2023 are unaudited. The financial data and other information contained in the notes hereto as of September 30, 2024 and for the three and nine months ended September 30, 2024 and 2023 are also unaudited. The condensed consolidated balance sheet data as of December 31, 2023 was derived from the Company’s audited consolidated financial statements included in the Company’s Annual Report on Form 10-K.

The unaudited interim condensed consolidated financial statements have been prepared on the same basis as the audited annual consolidated financial statements, and in the opinion of management, reflect all adjustments, which include only normal recurring adjustments necessary for the fair presentation of the Company’s financial position as of September 30, 2024 and the results of its operations and cash flows for the three and nine months ended September 30, 2024 and 2023. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements as of and for the year ended December 31, 2023, and the notes thereto, included in the Company’s Annual Report on Form 10-K.

The results for the three and nine months ended September 30, 2024 and 2023 are not necessarily indicative of results to be expected for the full years, or any other interim periods, or any future year or period.

Use of Estimates

The preparation of the Company’s condensed consolidated financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of expenses during the reporting period. Significant estimates and assumptions reflected in these condensed consolidated financial statements include, but are not limited to accrued research and development expenses; stock-based compensation expense; the fair value determinations for instruments accounted for at fair value; the fair value of the contingent value right (“CVR”) (see Note 3); the incremental borrowing rate for determining lease liabilities and right-of-use assets; and income taxes. The Company bases its estimates on historical experience, known trends and other market-specific or other relevant factors that it has concluded to be reasonable under the circumstances. On an ongoing basis, management evaluates its estimates as there are changes in circumstances, facts and experience. Changes in estimates are recorded in the period in which they become known. Actual results may differ materially from those estimates or assumptions.

Concentration of Credit Risk and of Significant Suppliers

Financial instruments that potentially subject the Company to significant concentrations of credit risk consist primarily of cash, cash equivalents, and marketable securities. The Company maintains deposits in federally insured financial institutions in excess of federally insured limits and limits its exposure to cash risk by placing its cash with high credit quality accredited financial institutions. The Company has concluded that it is not subject to unusual credit risk beyond the normal credit risk associated with commercial banking relationships.

The Company relies, and expects to continue to rely, on a small number of vendors to manufacture supplies and to process its product candidates for its development programs. These programs could be adversely affected by a significant interruption in the manufacturing process or supply chain.

Comprehensive Income (Loss)

Comprehensive income (loss) is the change in equity of a business enterprise during a period from transactions and other events and circumstances from non-owner sources. Comprehensive income (loss) includes net income (loss) and the change in accumulated other comprehensive income (loss) for the period. Accumulated other comprehensive income (loss) consisted of foreign currency translation adjustments and unrealized gains (losses) on available-for-sale marketable securities during the three and nine months ended September 30, 2024 and 2023.

Marketable Securities

The Company classifies its marketable securities as available-for-sale. All of the Company’s marketable securities are available to the Company for use in current operations. As a result, the Company classified all of these securities as current assets even though the stated maturity of some individual securities may be one year or more beyond the balance sheet date. Marketable securities are maintained by an investment manager and consist of U.S. government securities. Marketable securities are carried at fair value with the unrealized gains and losses included in accumulated other comprehensive income (loss) as a component of stockholders’ equity until realized. Any premium or discount arising at purchase is amortized and/or accreted to interest income and/or expense over the life of the underlying marketable security.

Although available to be sold to meet operating needs or otherwise, securities are generally held through maturity. The cost of securities sold is determined on a specific identification basis, and realized gains and losses are included in other income (expense), net within the condensed consolidated statements of operations and comprehensive loss.

The Company reviews its portfolio of available-for-sale securities, using both quantitative and qualitative factors, to determine if declines in fair value below cost have resulted from a credit loss or other factors. If the decline in fair value is due to credit loss factors, a loss is recognized. To date, the Company has not experienced any credit losses and does not expect it is exposed to any significant credit risk on these investments.

Recently Issued Accounting Pronouncements Not Yet Adopted

Other accounting standards that have been issued or proposed by the FASB or other standards-setting bodies that do not require adoption until a future date are not expected to have a material impact on the Company’s condensed consolidated financial statements upon adoption.

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Fair Value Measurements

9 Months Ended

Sep. 30, 2024

Fair Value Disclosures [Abstract]

Fair Value Measurements

3. Fair Value Measurements

The following tables present information about the Company’s assets and liabilities that are regularly measured and carried at fair value on a recurring basis and indicate the level within the fair value hierarchy of the valuation techniques the Company utilized to determine such fair value, which is described further within Note 2 to the consolidated financial statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023.

Financial assets and liabilities measured at fair value on a recurring basis are summarized as follows (in thousands):

	September 30, 2024
	Level 1		Level 2		Level 3
Assets
Cash equivalents:
Money market funds	$	65,006	$	—	$	—
U.S. treasury securities		—		116,104		—
Total cash equivalents		65,006		116,104		—
Marketable securities:
U.S. treasury securities		—		188,007		—
U.S. government agency securities		—		106,718		—
Total marketable securities		—		294,725		—
Total assets	$	65,006	$	410,829	$	—

	December 31, 2023
	Level 1		Level 2		Level 3
Assets
Cash equivalents:
Money market funds	$	55,001	$	—	$	—
U.S. treasury securities		—		255,419		—
Total cash equivalents		55,001		255,419		—
Total assets	$	55,001	$	255,419	$	—

The fair value of the Company’s Level 1 cash equivalents, consisting of money market funds, is based on quoted market prices in active markets with no valuation adjustment. The fair value of the Company’s Level 2 cash equivalents and marketable securities, consisting of U.S. treasury and U.S. government agency securities, with original maturities of three months or less and twelve months or less, respectively, are determined through third-party pricing services. The amortized cost of the cash equivalents approximates the fair value. There have been no impairments of the Company’s assets measured and carried at fair value nor changes in valuation techniques during the three and nine months ended September 30, 2024 and 2023. The Company did not have any non-recurring fair value measurements on any assets or liabilities during the three and nine months ended September 30, 2024 and 2023.

On August 9, 2022, Gemini Therapeutics, Inc., a Delaware corporation (“Gemini”), Gemstone Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Gemini (“Merger Sub”), and Disc Medicine, Inc., a Delaware corporation (“Private Disc”), entered into an Agreement and Plan of Merger and Reorganization (the “Merger Agreement”). The merger was completed on December 29, 2022. As described in Note 1 to the consolidated financial statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023, in connection with the merger, the stockholders of Gemini at the effective time of the merger received a CVR to receive consideration from the Company upon its receipt of certain proceeds, resulting from a disposition of Gemini’s pre-merger assets within one year after the closing of the merger, calculated in accordance with the Contingent Value Rights Agreement (the "CVR Agreement"). The disposition period ended December 29, 2023 and no dispositions of Gemini's pre-merger assets were made during the disposition period. Therefore, the CVR obligation no longer existed as of September 30, 2024 and December 31, 2023, respectively.

The following table provides a summary of changes in fair value of the CVR liability for the nine months ended September 30, 2023 (in thousands):

	Level 3 Rollforward
Balance at December 31, 2022	$	—
Change in fair value of contingent value right liability		—
Balance at March 31, 2023		—
Change in fair value of contingent value right liability		1,500
Balance at June 30, 2023		1,500
Change in fair value of contingent value right liability		—
Balance at September 30, 2023	$	1,500

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Marketable Securities

9 Months Ended

Sep. 30, 2024

Marketable Securities [Abstract]

Marketable Securities

4. Marketable Securities

Marketable securities as of September 30, 2024 consisted of the following (in thousands):

			Gross Unrealized
	Amortized Cost		Gains		Losses			Estimated Fair Value
Marketable securities available-for-sale:
U.S. treasury securities	$	187,490	$	519	$	(2	)	$	188,007
U.S. government agency securities		106,452		266		—			106,718
Total available-for-sale securities	$	293,942	$	785	$	(2	)	$	294,725

Marketable securities as of December 31, 2023 were zero. As of September 30, 2024, all marketable securities had an original maturity date of twelve months or less. The aggregate fair value of marketable securities with unrealized losses was $7.0 million as of September 30, 2024 and zero as of December 31, 2023. As of September 30, 2024 and December 31, 2023, one investment and no investments, respectively, were in an unrealized loss position. All such investments have been in an unrealized loss position for less than a year and these losses are considered temporary. The Company has the ability and intent to hold these investments until a recovery of their amortized cost, which may not occur until maturity. The Company expects that U.S. treasury and U.S. government agency securities are subject to minimal credit risk. As a result, the Company did not record any charges for credit-related impairments for its available-for-sale securities for the three and nine months ended September 30, 2024 and 2023.

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Cash, Cash Equivalents and Restricted Cash

9 Months Ended

Sep. 30, 2024

Cash and Cash Equivalents [Abstract]

Cash, Cash Equivalents and Restricted Cash

5. Cash, Cash Equivalents and Restricted Cash

Cash, cash equivalents and restricted cash consisted of the following (in thousands):

	September 30,		December 31,
	2024		2023
Cash and cash equivalents	$	192,638	$	360,382
Restricted cash		236		234
Total cash, cash equivalents and restricted cash as shown on the condensed    consolidated statements of cash flows	$	192,874	$	360,616

The Company's restricted cash balance, which is classified within other assets on the condensed consolidated balance sheets, consists of letters of credit related to leased and subleased office space in Watertown, Massachusetts. The Company is required to maintain a separate cash balance to secure its letters of credit.

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Property and Equipment, Net

9 Months Ended

Sep. 30, 2024

Property, Plant and Equipment [Abstract]

Property and Equipment, Net

6. Property and Equipment, Net

Property and equipment, net consisted of the following (in thousands):

	September 30,			December 31,
	2024			2023
Computer equipment	$	231		$	231
Furniture and fixtures		240			184
Less: Accumulated depreciation		(392	)		(245	)
Property and equipment, net	$	79		$	170

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Other Accrued Expenses

9 Months Ended

Sep. 30, 2024

Accrued Liabilities [Abstract]

Other Accrued Expenses

7. Other Accrued Expenses

Other accrued expenses consisted of the following (in thousands):

	September 30,		December 31,
	2024		2023
Accrued employee-related expenses	$	4,567	$	5,790
Accrued professional fees		708		317
Accrued other		237		52
Total accrued expenses	$	5,512	$	6,159

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Development and License Agreements

9 Months Ended

Sep. 30, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Development and License Agreements

8. Development and License Agreements

License and Stock Purchase Agreement with AbbVie Deutschland GmbH & Co. KG (“AbbVie”)

In September 2019, the Company entered into an agreement with AbbVie, pursuant to which AbbVie granted the Company an exclusive license, with the right to grant sublicenses, to certain AbbVie intellectual property.

Under this agreement, the Company paid a non-refundable, non-creditable upfront fee of $0.6 million. The Company is also obligated to make future payments upon the achievement of certain development, commercialization and sales-based milestones up to $18.0 million, $45.0 million and $87.5 million, respectively on a licensed product-by-licensed product basis. In addition, the Company is also obligated to pay royalties based on net sales of the licensed products on a licensed product-by-licensed product and country-by-country basis. As of September 30, 2024, none of the milestones had been achieved.

The Company’s royalty obligation expires on a licensed product-by-licensed product and country-by-country basis upon the expiration of the last-to-expire valid claim under the licensed intellectual property rights in such country. Unless terminated earlier, the agreement expires upon the expiration of the Company’s royalty obligation for all licensed products. AbbVie can terminate the agreement if the Company fails to make any payments within a specified period after receiving written notice of such failure, or in the event of a material breach by the Company and failure to cure such breach within a certain period of time.

License Agreement with F. Hoffmann-La Roche Ltd and Hoffmann-La Roche Inc. (collectively “Roche”)

In connection with a license agreement with Roche, (the "Roche Agreement"), the Company paid Roche an upfront, non-refundable exclusivity payment of $0.5 million in March 2021. Upon execution of the Roche Agreement in May 2021, the Company paid Roche an additional upfront, non-refundable payment of $4.0 million.

The Company is obligated to make contingent payments to Roche up to an aggregate of $50.0 million in development and regulatory milestone payments for development and approval in a first indication and up to an aggregate of $35.0 million in development and regulatory milestone payments for development and approval in a second indication. The Company is also obligated to make contingent payments to Roche up to an aggregate of $120.0 million based on achievement of certain thresholds for annual net sales of licensed products. As of September 30, 2024, none of the milestones had been achieved. Roche is also eligible to receive tiered royalties on net sales of commercialized products, at rates ranging from high single-digits to high teens.

License Agreement with Mabwell Therapeutics, Inc. (“Mabwell”)

In January 2023, the Company entered into an exclusive license agreement with Mabwell, pursuant to which Mabwell granted the Company an exclusive and sublicensable license to certain Mabwell intellectual property.

In connection with the agreement, the Company paid Mabwell an upfront payment of $10.0 million in March 2023. In October 2023, the Company dosed the first patient in the Phase 1 clinical trial for DISC-3405, resulting in a milestone payment of $5.0 million due to Mabwell. In addition, the Company is obligated to pay certain development and regulatory milestone payments for the licensed products, for up to three indications, up to a maximum aggregate amount of $127.5 million, as well as certain commercial milestone payments for certain licensed product net sales achievements, up to a maximum aggregate amount of $275.0 million. The Company is further obligated to pay a tiered percentage of revenue that the Company receives from its sublicensees ranging from a low third decile percentage to a low first decile percentage. In addition, the Company is obligated to pay Mabwell a royalty on annual net sales of all licensed products at a tiered rate ranging from low single-digits to high single-digits.

During the three and nine months ended September 30, 2024, the Company recorded less than $0.1 million of research and development expense related to its arrangement with Mabwell. During the three and nine months ended September 30, 2023, the Company recorded research and development expense related to its arrangement with Mabwell of zero and $10.0 million, respectively.

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Convertible Preferred Stock

9 Months Ended

Sep. 30, 2024

Stockholders' Equity Note [Abstract]

Convertible Preferred Stock

9. Convertible Preferred Stock

As of September 30, 2024 and December 31, 2023, the Company was authorized to issue up to 10,000,000 shares of preferred stock at a par value of $0.0001, with no shares issued or outstanding.

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Common Stock

9 Months Ended

Sep. 30, 2024

Stockholders' Equity Note [Abstract]

Common Stock

10. Common Stock

As of September 30, 2024 and December 31, 2023, the authorized capital stock of the Company included 100,000,000 shares of common stock, $0.0001 par value per share. As of September 30, 2024, the Company has 2,972,432 shares of common stock reserved for the exercise of stock options and 204,081 shares of common stock reserved for the exercise of pre-funded warrants.

Underwritten Offering

In June 2024, the Company entered into an underwriting agreement with Leerink Partners related to an underwritten offering of 4,944,000 shares of common stock of the Company, par value $0.0001 per share, at a price to the public of $36.00 per share. The Company received net proceeds of $172.5 million, after deducting the underwriting discount and offering expenses of $5.5 million.

Follow-On Public Offering

In June 2023, the Company issued 3,015,919 shares of its common stock upon the completion of its public follow-on offering, which included the exercise in full by the underwriters of their option to purchase up to 420,000 additional shares of common stock, at a public offering price of $49.00 per share. The Company also sold, in lieu of shares of the Company’s common stock, pre-funded warrants to purchase an aggregate of 204,081 shares of common stock at a price of $48.9999 per pre-funded warrant. The Company received aggregate net proceeds of $147.9 million, after deducting offering expenses of $9.9 million.

The pre-funded warrants provide that the holder will not have the right to exercise any portion of its warrants if such holder, together with its affiliates, would beneficially own in excess of 24.99% of the number of shares of Common Stock outstanding immediately after giving effect to the exercise (the “Ownership Limit”). Purchasers of the pre-funded warrants may also elect to set the initial Ownership Limit at 4.99%, 9.99% or 19.99%. Upon at least 61 days’ prior notice from the holder to the Company, the holder may increase or decrease the Ownership Limit up to 24.99%, provided however that purchasers that select an Ownership Limit of 19.99% or less will only be allowed to increase the Ownership Limit above 19.99% if such increase would not result in a change of control under the rules and regulations of the Nasdaq Stock Market LLC. The pre-funded warrants meet the condition for equity classification and were therefore recorded as a component of stockholders’ equity within additional paid-in capital.

Registered Direct Offering

In February 2023, the Company entered into a securities purchase agreement, with certain investors. Pursuant to the securities purchase agreement, the Company sold an aggregate of 1,488,166 shares of the Company’s common stock, at a purchase price of $23.00 per share, and with respect to a certain investor, in lieu of shares of the Company’s common stock, pre-funded warrants to purchase an aggregate of 1,229,224 shares of the Company’s common stock, at a purchase price of $22.9999 per pre-funded warrant, for aggregate net proceeds of $62.4 million, after deducting offering expenses of $0.1 million.

The pre-funded warrants provide that the holder will not have the right to exercise any portion of its warrants if such holder, together with its affiliates, would beneficially own in excess of 9.99% of the number of shares of the Company’s common stock outstanding immediately after giving effect to such exercise (the “Beneficial Ownership Limitation”); provided, however, that the holder may increase or decrease the Beneficial Ownership Limitation by giving 61 days’ notice, but not to any percentage in excess of 19.99%. The investors or their affiliates are beneficial holders of more than 5% of the Company’s capital stock. The pre-funded warrants meet the condition for equity classification and were therefore recorded as a component of stockholders’ equity within additional paid-in capital at the time of their issuance. In September 2023, all of the pre-funded warrants were exercised in a cashless transaction which resulted in 1,229,221 shares of common stock being issued to the investor.

ATM Program

In January 2023, the Company filed a shelf registration statement on Form S-3 with the SEC, which covered the offering, issuance and sale by the Company of up to an aggregate of $300.0 million of the Company’s common stock, preferred stock, debt securities, warrants or units (the “January 2023 Shelf”). Subsequently in January 2023, the Company entered into a Sales Agreement (the “Sales Agreement”) with SVB Securities LLC, as sales agent, to provide for the offering, issuance and sale by the Company of up to $100.0 million of the Company’s common stock from time to time in “at-the-market” (“ATM”) offerings under the January 2023 Shelf. Effective June 12, 2023, the ATM program with SVB Securities LLC was suspended. Following the date of the ATM suspension, the Company did not make any further sales of its common stock pursuant to the Sales Agreement. The Sales Agreement was terminated effective September 28, 2023. In connection with the ATM suspension, the Company recognized the remaining capitalized issuance costs of $0.3 million as general and administrative expense in the condensed consolidated statements of operations and comprehensive loss for the nine months ended September 30, 2023. As of September 30, 2023, the Company had sold an aggregate of 825,350 shares of common stock in ATM offerings under the January 2023 Shelf. Aggregate gross proceeds

from the transactions were $20.0 million and the Company received $19.5 million in net proceeds, after deducting placement agent fees and offering expenses.

In October 2023, the Company entered into an Open Market Sale Agreement with Jefferies LLC as sales agent (the “ATM Agreement”) to provide for the offering, issuance and sale by the Company of up to $59.7 million of the Company’s common stock from time to time in ATM offerings under the January 2023 Shelf.

In November 2023, the Company filed a shelf registration statement on Form S-3 with the SEC, which covered the offering, issuance and sale by the Company of up to an aggregate of $400.0 million of the Company’s common stock, preferred stock, debt securities, warrants or units (the “November 2023 Shelf”). On December 5, 2023, the Company and Jefferies LLC entered into an amendment to the ATM Agreement to increase the aggregate offering price of the shares of common stock that the Company may offer under the ATM Agreement from $59.7 million to $200.0 million. The material terms and conditions of the ATM Agreement otherwise remained unchanged. As of December 31, 2023, the Company had sold an aggregate of 141,914 shares of common stock in ATM offerings under the November 2023 Shelf and pursuant to the ATM Agreement. Aggregate gross proceeds from the transactions were $7.2 million and the Company received $7.0 million in net proceeds, after deducting placement agent fees and offering expenses.

During the three months ended March 31, 2024, the Company sold an aggregate of 234,449 shares of common stock in ATM offerings under the November 2023 Shelf and pursuant to the ATM Agreement. Aggregate gross proceeds from the transactions were $15.3 million and the Company received $14.8 million in net proceeds, after deducting placement agent fees and offering expenses. During the three months ended June 30, 2024 and September 30, 2024, respectively, the Company sold no shares in ATM offerings. As of September 30, 2024, the Company had sold an aggregate of 376,363 shares of common stock in ATM offerings under the November 2023 Shelf for aggregate gross proceeds of $22.5 million and aggregate net proceeds received of $21.8 million, after deducting placement agent fees and offering expenses.

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Stock-Based Compensation

9 Months Ended

Sep. 30, 2024

Share-Based Payment Arrangement [Abstract]

Stock-Based Compensation

11. Stock-Based Compensation

The Company grants stock-based awards under its 2021 Stock Option and Incentive Plan (the “2021 Plan”), which was approved by its stockholders in February 2021 and amended and restated in January 2023. The Company also has outstanding stock option awards under its 2017 Stock Option and Grant Plan (the “Private Disc Plan”), the 2017 Stock Option and Grant Plan (the “Gemini 2017 Plan”), and the 2021 Inducement Plan, but is no longer granting awards under these plans. The Company also grants awards under its 2021 Employee Stock Purchase Plan (the “2021 ESPP”), which was approved by the Company's stockholders in July 2021 and amended and restated in January 2023. In addition, subject to approval by the Company's board of directors, the Company may grant stock-based awards outside of the 2021 Plan as an inducement to its executives.

Stock-Based Compensation Expense

Total stock-based compensation expense recorded as research and development and general and administrative expenses, respectively, for employees, directors and non-employees is as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024		2023
Research and development	$	1,680	$	455	$	4,909	$	1,167
General and administrative		2,652		815		7,572		2,436
Total stock-based compensation expense	$	4,332	$	1,270	$	12,481	$	3,603

The following table summarizes unrecognized stock-based compensation expense as of September 30, 2024.

	Unrecognized Expense (In Thousands)		Weighted-Average Remaining Period of Recognition (In Years)
Restricted stock units	$	22,517		3.45
Stock options		29,356		2.93
Total unrecognized equity-based compensation expense	$	51,873

Restricted Stock Units

For purposes of calculating stock-based compensation, the Company determines the fair value of the restricted stock units based on the fair value of the Company’s common stock at the time of grant.

On February 7, 2024, the Company granted a restricted stock unit award for 36,666 shares of common stock outside of the 2021 Plan to its newly appointed Chief Financial Officer, Jean Franchi, as an inducement for entering into employment with the Company in accordance with Nasdaq Listing Rule 5635(c)(4). The restricted stock unit award vests with respect to 25% of the

underlying shares on each of the first, second, third and fourth anniversaries of the vesting date as set by the Company policy, subject to Ms. Franchi’s continued employment with the Company.

On February 26, 2024, the Company granted a restricted stock unit award for 36,666 shares of common stock outside of the 2021 Plan to its newly appointed Chief Commercial Officer, Pamela Stephenson, as an inducement for entering into employment with the Company in accordance with Nasdaq Listing Rule 5635(c)(4). The restricted stock unit award vests with respect to 25% of the underlying shares on each of the first, second, third and fourth anniversaries of the vesting date as set by the Company policy, subject to Ms. Stephenson’s continued employment with the Company.

On September 16, 2024, the Company granted a restricted stock unit award for 36,666 shares of common stock outside of the 2021 Plan to its newly appointed Chief Regulatory Officer, Dr. Steven Caffé, as an inducement for entering into employment with the Company in accordance with Nasdaq Listing Rule 5635(c)(4). The restricted stock unit award vests with respect to 25% of the underlying shares on each of the first, second, third and fourth anniversaries of the vesting date as set by the Company policy, subject to Dr. Caffé’s continued employment with the Company.

The following table summarizes restricted stock unit activity for the nine months ended September 30, 2024.

	Number of Units			Weighted- Average Grant Date Fair Value
Restricted stock units as of December 31, 2023		—		$	—
Granted		440,562			61.38
Forfeited		(11,040	)		63.90
Restricted stock units as of September 30, 2024		429,522		$	61.31

Stock Options

For purposes of calculating stock-based compensation, the Company estimates the fair value of stock options on the grant date using the Black-Scholes option-pricing model. This model incorporates various assumptions, including the expected volatility, expected term, and interest rates.

On February 7, 2024, the Company granted an option to purchase 55,000 shares of common stock outside of the 2021 Plan to its newly appointed Chief Financial Officer, Jean Franchi, as an inducement for entering into employment with the Company in accordance with Nasdaq Listing Rule 5635(c)(4). The option award has a ten-year term, with 25% of the underlying shares vesting and becoming exercisable on February 7, 2025, and the balance of the option award vesting in equal monthly installments over 36 months thereafter, subject to Ms. Franchi’s continued employment with the Company, and has an exercise price of $65.25.

On February 26, 2024, the Company granted an option to purchase 55,000 shares of common stock outside of the 2021 Plan to its newly appointed Chief Commercial Officer, Pamela Stephenson, as an inducement for entering into employment with the Company in accordance with Nasdaq Listing Rule 5635(c)(4). The option award has a ten-year term, with 25% of the underlying shares vesting and becoming exercisable on February 26, 2025, and the balance of the option award vesting in equal monthly installments over 36 months thereafter, subject to Ms. Stephenson’s continued employment with the Company, and has an exercise price of $64.66.

On September 16, 2024, the Company granted an option to purchase 55,000 shares of common stock outside of the 2021 Plan to its newly appointed Chief Regulatory Officer, Dr. Steven Caffé, as an inducement for entering into employment with the Company in accordance with Nasdaq Listing Rule 5635(c)(4). The option award has a ten-year term, with 25% of the underlying shares vesting and becoming exercisable on September 16, 2025, and the balance of the option award vesting in equal monthly installments over 36 months thereafter, subject to Dr. Caffé’s continued employment with the Company, and has an exercise price of $47.68.

The following table summarizes stock option activity for the nine months ended September 30, 2024.

	Number of Options			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (In Years)		Aggregate Intrinsic Value (In Thousands)
Outstanding at December 31, 2023		2,459,037		$	13.82		7.81	$	109,078
Granted		796,140			59.76
Exercised		(198,390	)		8.99
Forfeited		(71,691	)		44.79
Expired		(12,664	)		110.57
Outstanding at September 30, 2024		2,972,432		$	25.29		7.77	$	80,424
Exercisable at September 30, 2024		1,571,812		$	13.53		6.93	$	57,338

The aggregate intrinsic value of options is calculated as the difference between the exercise price of the stock options and the fair value of the Company’s common stock for those stock options that had exercise prices lower than the fair value of the common stock as of the end of the period. The aggregate intrinsic value of stock options exercised during the nine months ended September 30, 2024 and 2023 was $8.3 million and $4.5 million, respectively. The total fair value of options vested during the nine months ended September 30, 2024 and 2023 was $7.9 million and $2.9 million, respectively.

The weighted-average assumptions used to estimate the fair value of stock options granted were as follows:

	Nine Months Ended September 30,
	2024			2023
Risk-free interest rate		3.99	%		3.87	%
Expected term (in years)		6.39			7.14
Expected volatility		59	%		59	%
Expected dividend yield		0	%		0	%
Fair value per share of common stock	$	59.76		$	41.48

The weighted-average grant-date fair value of options granted during the nine months ended September 30, 2024 and 2023 was $35.55 and $25.68, respectively.

Shares of Restricted Common Stock

As of September 30, 2024, the Company had issued 63,061 shares of restricted common stock to the founders of Disc Medicine, Inc. prior to the merger (now known as Disc Medicine OpCo, Inc.), pursuant to subscription agreements and to certain key employees pursuant to the Private Disc Plan at $0.0001 per share. The stock restrictions relate to the sale and transferability of the stock and lapse over the defined vesting period in the restricted stock agreement. The vesting period is generally contingent upon continued employment or consulting services being provided to the Company. In the event of termination, the Company has the right, but not the obligation to repurchase the unvested shares at the original purchase price. As of September 30, 2024, these awards of restricted common stock were fully vested.

A summary of restricted common stock activity is as follows:

	Nine Months Ended September 30,
	2024		2023
Unvested at the beginning of the year		—		1,916
Vested		—		(1,916	)
Unvested at the end of the period		—		—

Employee Stock Purchase Plan

During the nine months ended September 30, 2024 and 2023, 11,082 shares and zero shares of common stock were issued under the 2021 ESPP, respectively.

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Income Taxes

9 Months Ended

Sep. 30, 2024

Income Tax Disclosure [Abstract]

Income Taxes

12. Income Taxes

The Company did not record a provision or benefit for federal income taxes during the three and nine months ended September 30, 2024 and 2023. The Company recorded state income tax expense of $0.2 million and less than $0.1 million for the nine months ended September 30, 2024 and 2023, respectively, due to interest income. The Company continues to maintain a full valuation allowance against all of its deferred tax assets.

The Company has evaluated the positive and negative evidence involving its ability to realize its deferred tax assets and has considered its history of cumulative net losses incurred since inception and its lack of any commercially ready products. The Company has concluded that it is more likely than not that it will not realize the benefits of its deferred tax assets. The Company reevaluates the positive and negative evidence at each reporting period.

The Company has never been examined by the Internal Revenue Service or any other jurisdiction for any tax years and, as such, all years within the applicable statutes of limitations are potentially subject to audit.

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Net Loss Per Share

9 Months Ended

Sep. 30, 2024

Earnings Per Share [Abstract]

Net Loss Per Share

13. Net Loss Per Share

Basic and diluted net loss per share is computed by dividing net loss attributable to common stockholders by the weighted-average common shares outstanding. The weighted-average common shares outstanding used in the basic and diluted net loss per share calculation includes the pre-funded warrants issued in connection with the Company’s follow-on public offering in June 2023 of 204,081 and registered direct offering in February 2023 of 1,229,224, as the pre-funded warrants are exercisable for nominal cash

consideration. In September 2023, 1,229,224 of the pre-funded warrants were exercised in a cashless transaction which resulted in 1,229,221 shares of common stock being issued to the investor. As of September 30, 2024, 204,081 pre-funded warrants were outstanding.

The Company has generated a net loss in all periods presented, so the basic and diluted net loss per share are the same, as the inclusion of the potentially dilutive securities would be anti-dilutive. The Company excluded the following from the computation of diluted net loss per share attributable to common stockholders because including them would have had an anti-dilutive effect:

	September 30,
	2024		2023
Restricted stock units		429,522		—
Options to purchase common stock		2,972,432		2,558,531
Employee stock purchase program		2,436		—

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2024

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

14. Commitments and Contingencies

Indemnification Agreements

In the ordinary course of business, the Company may provide indemnification of varying scope and terms to its vendors, lessors, contract research organizations, business partners and other parties with respect to certain matters including, but not limited to, losses arising out of breach of such agreements or from intellectual property infringement claims made by third parties. In addition, the Company has entered into indemnification agreements with members of its Board that will require the Company, among other things, to indemnify them against certain liabilities that may arise by reason of their status or service as directors. The maximum potential amount of future payments the Company could be required to make under these indemnification agreements is, in many cases, unlimited. The Company has not incurred any material costs as a result of such indemnifications and is not currently aware of any indemnification claims.

Legal Proceedings

The Company, from time to time, may be party to litigation arising in the ordinary course of business. The Company was not subject to any material legal proceedings during the nine months ended September 30, 2024 and 2023 and, to the best of its knowledge, no material legal proceedings are currently pending or threatened.

Payments Upon Termination

The Company enters into contracts in the normal course of business with contract research organizations (“CROs”), and contract development and manufacturing organizations (“CDMOs”) and other third parties for preclinical studies, clinical trials and manufacturing services. These contracts typically do not contain minimum purchase commitments and are generally cancelable by the Company upon written notice. Payments due upon cancellation consist of payments for services provided or expenses incurred, including noncancelable obligations of the Company’s service providers, up to the date of cancellation and, in the case of certain arrangements with CROs and CDMOs, may include noncancelable fees. Under such agreements, the exact amounts owed by the Company in the event of termination will be based on the timing of the termination and the exact terms of the agreement. As of September 30, 2024, the Company has not recognized any amounts related to these contingencies as the amount and timing of such payments are not fixed and estimable.

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Leases

9 Months Ended

Sep. 30, 2024

Leases [Abstract]

Leases

15. Leases

The Company is a tenant under a lease and sublease of office space in Watertown, Massachusetts, both operating leases.

In August 2024, the Company amended its lease of 7,566 square feet of office space which serves as the Company’s corporate headquarters. The lease was amended to extend the term from November 30, 2026 through December 31, 2029. The Company accounted for this amendment as a modification which resulted in the application of a new incremental borrowing rate and the recognition of an additional right-of-use asset and lease liability of $0.1 million, inclusive of a tenant improvement allowance of $0.5 million.

In connection with the August 2024 amendment, the Company entered into a forward-starting lease of 9,281 square feet of office space on the second floor of its corporate headquarters, which the Company is currently subleasing through November 30, 2026. The forward-starting lease is expected to commence on December 1, 2026 immediately following the conclusion of the sublease, and has a term date of December 31, 2029. The Company expects to make undiscounted payments of $1.0 million over the term of the lease, inclusive of a tenant improvement allowance of $0.3 million. The impact of the forward-starting lease is not currently recorded on the Company’s condensed consolidated balance sheets as of the reporting date. The Company will record the impact upon lease commencement.

In June 2023, the Company entered into a sublease for a term of approximately three and a half years through November 2026, consisting of 9,281 square feet of office space on the second floor of its corporate headquarters. Fixed lease payments include base rent, subject to annual rent increases, and a management fee. Variable lease payments include the Company’s allocated share of costs incurred for real estate taxes, utilities, and other operating expenses applicable to the leased premises. Pursuant to the lease, the Company is also obligated to pay for certain administrative costs, taxes and operating expenses.

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Related Party Transactions

9 Months Ended

Sep. 30, 2024

Related Party Transactions [Abstract]

Related Party Transactions

16. Related Party Transactions

In June 2024, certain existing investors participated in the Company's underwritten offering (see Note 10).

In June 2023, an existing investor participated in the Company’s follow-on offering (see Note 10).

In March 2023, the Company executed a promissory note for an aggregate principal amount of $0.5 million from an existing investor. The Company did not use these funds and repaid the note four days later, recording a de minimis amount of interest expense based on the then Federal funds rate for short term loans of 4.5% per annum.

In February 2023, certain existing investors participated in the Company’s registered direct offering (see Note 10).

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Subsequent Events

9 Months Ended

Sep. 30, 2024

Subsequent Events [Abstract]

Subsequent Events

17. Subsequent Events

On November 6, 2024, the Company and certain of its subsidiaries (collectively, the “Borrower”) entered into a Loan and Security Agreement (the “Hercules Loan Agreement”) with the lenders party thereto (the “Lenders”) and Hercules Capital, Inc., as administrative agent and collateral agent (the “Agent”). The Hercules Loan Agreement provides for up to $200.0 million of senior secured term loans (the “Term Loan”) available to Borrower in multiple tranches consisting of: (a) an initial $30.0 million advance funded on the November 6, 2024; (b) up to $30.0 million of additional advances that may be drawn on or prior to September 15, 2026; (c) up to $50.0 million of additional advances that may be drawn on or prior to December 15, 2026; (d) subject to Borrower’s achievement of the Tranche 2 Milestone (as defined in the Hercules Loan Agreement), up to $25.0 million of additional advances that may be drawn on or prior to June 15, 2027; (e) subject to Borrower’s achievement of the Tranche 3 Milestone (as defined in the Hercules Loan Agreement), up to $40.0 million of additional advances that may be drawn on or prior to December 15, 2027; and (f) subject to approval by the Lenders’ investment committees in their discretion, up to $25.0 million of additional advances that may be drawn by Borrower.

The Term Loan will mature on December 1, 2029. The outstanding principal balance of the Term Loan bears cash interest at a floating annual rate equal to the greater of (a) 8.25% and (b) the prime rate plus 1.75%. Borrower may elect to reduce the cash interest rate by up to 2.00% per annum, in which case, subject to the terms and conditions of the Hercules Loan Agreement, the principal balance of the Term Loan also will bear “payment-in-kind” interest (“PIK Interest”) at a rate equal to 1.10 times such interest reduction amount, and with the PIK Interest added to the outstanding principal balance of the Term Loan. The Term Loan is payable in monthly interest-only payments through December 1, 2028, or, if Borrower achieves the Tranche 3 Milestone (as defined in the Hercules Loan Agreement), the interest-only period will be extended through December 1, 2029. At the end of the interest-only period, borrowings under the Hercules Loan Agreement are repayable in monthly payments of principal and accrued interest until the maturity date.

Borrower's obligations under the Hercules Loan Agreement are secured, subject to customary permitted liens and other agreed-upon exceptions, by a first-priority perfected security interest in all of the tangible and intangible assets of the Borrower, other than intellectual property. The Hercules Loan Agreement includes customary repayment and prepayment terms, affirmative and negative covenants and representations and warranties. The Hercules Loan Agreement also includes customary events of default. Additionally, the Hercules Loan Agreement contains a minimum cash covenant that requires Borrower to maintain certain levels of cash in accounts subject to a control agreement in favor of the Agent at all times beginning on the first day on or after January 1, 2027 (or January 1, 2028, if Borrower achieves a certain milestone) on which the aggregate principal amount of the Term Loan advances is then more than $50.0 million; provided, however, the minimum cash covenant will be waived during all times that Borrower’s market capitalization is greater than or equal to $1.0 billion.

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Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2024

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

The significant accounting policies used in preparation of the condensed consolidated financial statements are described in the Company’s audited consolidated financial statements as of and for the year ended December 31, 2023 and the notes thereto, which are included in the Company’s Annual Report on Form 10-K.

Basis of Presentation and Principles of Consolidation

Basis of Presentation and Principles of Consolidation

The accompanying condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation.

The Company’s condensed consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles (“GAAP”). Any reference in these notes to applicable guidance is meant to refer to the authoritative accounting principles generally accepted in the United States as found in the Accounting Standard Codification (“ASC”) and Accounting Standards Updates (“ASU”) of the Financial Accounting Standards Board (“FASB”).

Unaudited Interim Condensed Consolidated Financial Information

Unaudited Interim Condensed Consolidated Financial Information

The accompanying condensed consolidated financial statements as of September 30, 2024 and for the three and nine months ended September 30, 2024 and 2023 are unaudited. The financial data and other information contained in the notes hereto as of September 30, 2024 and for the three and nine months ended September 30, 2024 and 2023 are also unaudited. The condensed consolidated balance sheet data as of December 31, 2023 was derived from the Company’s audited consolidated financial statements included in the Company’s Annual Report on Form 10-K.

The unaudited interim condensed consolidated financial statements have been prepared on the same basis as the audited annual consolidated financial statements, and in the opinion of management, reflect all adjustments, which include only normal recurring adjustments necessary for the fair presentation of the Company’s financial position as of September 30, 2024 and the results of its operations and cash flows for the three and nine months ended September 30, 2024 and 2023. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements as of and for the year ended December 31, 2023, and the notes thereto, included in the Company’s Annual Report on Form 10-K.

The results for the three and nine months ended September 30, 2024 and 2023 are not necessarily indicative of results to be expected for the full years, or any other interim periods, or any future year or period.

Use of Estimates

Use of Estimates

The preparation of the Company’s condensed consolidated financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of expenses during the reporting period. Significant estimates and assumptions reflected in these condensed consolidated financial statements include, but are not limited to accrued research and development expenses; stock-based compensation expense; the fair value determinations for instruments accounted for at fair value; the fair value of the contingent value right (“CVR”) (see Note 3); the incremental borrowing rate for determining lease liabilities and right-of-use assets; and income taxes. The Company bases its estimates on historical experience, known trends and other market-specific or other relevant factors that it has concluded to be reasonable under the circumstances. On an ongoing basis, management evaluates its estimates as there are changes in circumstances, facts and experience. Changes in estimates are recorded in the period in which they become known. Actual results may differ materially from those estimates or assumptions.

Concentration of Credit Risk and of Significant Suppliers

Concentration of Credit Risk and of Significant Suppliers

Financial instruments that potentially subject the Company to significant concentrations of credit risk consist primarily of cash, cash equivalents, and marketable securities. The Company maintains deposits in federally insured financial institutions in excess of federally insured limits and limits its exposure to cash risk by placing its cash with high credit quality accredited financial institutions. The Company has concluded that it is not subject to unusual credit risk beyond the normal credit risk associated with commercial banking relationships.

The Company relies, and expects to continue to rely, on a small number of vendors to manufacture supplies and to process its product candidates for its development programs. These programs could be adversely affected by a significant interruption in the manufacturing process or supply chain

Comprehensive Income (Loss)

Comprehensive Income (Loss)

Comprehensive income (loss) is the change in equity of a business enterprise during a period from transactions and other events and circumstances from non-owner sources. Comprehensive income (loss) includes net income (loss) and the change in accumulated other comprehensive income (loss) for the period. Accumulated other comprehensive income (loss) consisted of foreign currency translation adjustments and unrealized gains (losses) on available-for-sale marketable securities during the three and nine months ended September 30, 2024 and 2023.

Marketable Securities

Marketable Securities

The Company classifies its marketable securities as available-for-sale. All of the Company’s marketable securities are available to the Company for use in current operations. As a result, the Company classified all of these securities as current assets even though the stated maturity of some individual securities may be one year or more beyond the balance sheet date. Marketable securities are maintained by an investment manager and consist of U.S. government securities. Marketable securities are carried at fair value with the unrealized gains and losses included in accumulated other comprehensive income (loss) as a component of stockholders’ equity until realized. Any premium or discount arising at purchase is amortized and/or accreted to interest income and/or expense over the life of the underlying marketable security.

Although available to be sold to meet operating needs or otherwise, securities are generally held through maturity. The cost of securities sold is determined on a specific identification basis, and realized gains and losses are included in other income (expense), net within the condensed consolidated statements of operations and comprehensive loss.

The Company reviews its portfolio of available-for-sale securities, using both quantitative and qualitative factors, to determine if declines in fair value below cost have resulted from a credit loss or other factors. If the decline in fair value is due to credit loss factors, a loss is recognized. To date, the Company has not experienced any credit losses and does not expect it is exposed to any significant credit risk on these investments.

Recently Adopted and Issued Accounting Pronouncements

Recently Issued Accounting Pronouncements Not Yet Adopted

Other accounting standards that have been issued or proposed by the FASB or other standards-setting bodies that do not require adoption until a future date are not expected to have a material impact on the Company’s condensed consolidated financial statements upon adoption.

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2024

Fair Value Disclosures [Abstract]

Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis

Financial assets and liabilities measured at fair value on a recurring basis are summarized as follows (in thousands):

	September 30, 2024
	Level 1		Level 2		Level 3
Assets
Cash equivalents:
Money market funds	$	65,006	$	—	$	—
U.S. treasury securities		—		116,104		—
Total cash equivalents		65,006		116,104		—
Marketable securities:
U.S. treasury securities		—		188,007		—
U.S. government agency securities		—		106,718		—
Total marketable securities		—		294,725		—
Total assets	$	65,006	$	410,829	$	—

	December 31, 2023
	Level 1		Level 2		Level 3
Assets
Cash equivalents:
Money market funds	$	55,001	$	—	$	—
U.S. treasury securities		—		255,419		—
Total cash equivalents		55,001		255,419		—
Total assets	$	55,001	$	255,419	$	—

Summary of Changes in Fair Value of the Level 3 Liabilities

The following table provides a summary of changes in fair value of the CVR liability for the nine months ended September 30, 2023 (in thousands):

	Level 3 Rollforward
Balance at December 31, 2022	$	—
Change in fair value of contingent value right liability		—
Balance at March 31, 2023		—
Change in fair value of contingent value right liability		1,500
Balance at June 30, 2023		1,500
Change in fair value of contingent value right liability		—
Balance at September 30, 2023	$	1,500

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Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2024

Marketable Securities [Abstract]

Schedule of Marketable Securities

Marketable securities as of September 30, 2024 consisted of the following (in thousands):

			Gross Unrealized
	Amortized Cost		Gains		Losses			Estimated Fair Value
Marketable securities available-for-sale:
U.S. treasury securities	$	187,490	$	519	$	(2	)	$	188,007
U.S. government agency securities		106,452		266		—			106,718
Total available-for-sale securities	$	293,942	$	785	$	(2	)	$	294,725

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Cash, Cash Equivalents and Restricted Cash (Tables)

9 Months Ended

Sep. 30, 2024

Cash and Cash Equivalents [Abstract]

Summary of Reconciliation of Cash and Cash Equivalents and Restricted Cash

Cash, cash equivalents and restricted cash consisted of the following (in thousands):

	September 30,		December 31,
	2024		2023
Cash and cash equivalents	$	192,638	$	360,382
Restricted cash		236		234
Total cash, cash equivalents and restricted cash as shown on the condensed    consolidated statements of cash flows	$	192,874	$	360,616

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Property and Equipment, Net (Tables)

9 Months Ended

Sep. 30, 2024

Property, Plant and Equipment [Abstract]

Schedule of Property Plant and Equipment

Property and equipment, net consisted of the following (in thousands):

	September 30,			December 31,
	2024			2023
Computer equipment	$	231		$	231
Furniture and fixtures		240			184
Less: Accumulated depreciation		(392	)		(245	)
Property and equipment, net	$	79		$	170

XML

Other Accrued Expenses (Tables)

9 Months Ended

Sep. 30, 2024

Accrued Liabilities [Abstract]

Summary of Other Accrued Expenses

Other accrued expenses consisted of the following (in thousands):

	September 30,		December 31,
	2024		2023
Accrued employee-related expenses	$	4,567	$	5,790
Accrued professional fees		708		317
Accrued other		237		52
Total accrued expenses	$	5,512	$	6,159

XML

Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2024

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Summary of Stock-based Compensation Expense

Total stock-based compensation expense recorded as research and development and general and administrative expenses, respectively, for employees, directors and non-employees is as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024		2023
Research and development	$	1,680	$	455	$	4,909	$	1,167
General and administrative		2,652		815		7,572		2,436
Total stock-based compensation expense	$	4,332	$	1,270	$	12,481	$	3,603

Summary of Unrecognized Stock-based Compensation

The following table summarizes unrecognized stock-based compensation expense as of September 30, 2024.

	Unrecognized Expense (In Thousands)		Weighted-Average Remaining Period of Recognition (In Years)
Restricted stock units	$	22,517		3.45
Stock options		29,356		2.93
Total unrecognized equity-based compensation expense	$	51,873

Schedule of Restricted Stock Unit Activity

A summary of restricted common stock activity is as follows:

	Nine Months Ended September 30,
	2024		2023
Unvested at the beginning of the year		—		1,916
Vested		—		(1,916	)
Unvested at the end of the period		—		—

Schedule of Stock Option Activity

The following table summarizes stock option activity for the nine months ended September 30, 2024.

	Number of Options			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (In Years)		Aggregate Intrinsic Value (In Thousands)
Outstanding at December 31, 2023		2,459,037		$	13.82		7.81	$	109,078
Granted		796,140			59.76
Exercised		(198,390	)		8.99
Forfeited		(71,691	)		44.79
Expired		(12,664	)		110.57
Outstanding at September 30, 2024		2,972,432		$	25.29		7.77	$	80,424
Exercisable at September 30, 2024		1,571,812		$	13.53		6.93	$	57,338

Summary of Fair Value of Stock Option Granted

The weighted-average assumptions used to estimate the fair value of stock options granted were as follows:

	Nine Months Ended September 30,
	2024			2023
Risk-free interest rate		3.99	%		3.87	%
Expected term (in years)		6.39			7.14
Expected volatility		59	%		59	%
Expected dividend yield		0	%		0	%
Fair value per share of common stock	$	59.76		$	41.48

Restricted stock units [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Schedule of Restricted Stock Unit Activity

The following table summarizes restricted stock unit activity for the nine months ended September 30, 2024.

	Number of Units			Weighted- Average Grant Date Fair Value
Restricted stock units as of December 31, 2023		—		$	—
Granted		440,562			61.38
Forfeited		(11,040	)		63.90
Restricted stock units as of September 30, 2024		429,522		$	61.31

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Net Loss Per Share (Tables)

9 Months Ended

Sep. 30, 2024

Earnings Per Share [Abstract]

Schedule of Antidilutive Securities Excluded from Computation of Diluted Net Loss Per Share Attributable to Common Stock holders

The Company excluded the following from the computation of diluted net loss per share attributable to common stockholders because including them would have had an anti-dilutive effect:

	September 30,
	2024		2023
Restricted stock units		429,522		—
Options to purchase common stock		2,972,432		2,558,531
Employee stock purchase program		2,436		—

XML

Organization and Nature of the Business - Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Nature Of Business [Line Items]
Cash, cash equivalents and short-term marketable securities	$ 487,400
Accumulated deficit	$ (268,545)	$ (188,645)

XML

Reverse Merger with Gemini - Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Cash and cash equivalents	$ 192,638		$ 360,382
Stock-based compensation	$ 12,481	$ 3,603

XML

Fair Value Measurements - Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities	$ 294,725
Level 1 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	65,006	$ 55,001
Marketable securities	0
Total assets	65,006	55,001
Level 1 [Member] | Money Market Funds [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	65,006	55,001
Level 1 [Member] | U.S. Treasury securities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Marketable securities	0
Level 1 [Member] | U.S. government agency securities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities	0
Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	116,104	255,419
Marketable securities	294,725
Total assets	410,829	255,419
Level 2 [Member] | Money Market Funds [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Level 2 [Member] | U.S. Treasury securities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	116,104	255,419
Marketable securities	188,007
Level 2 [Member] | U.S. government agency securities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities	106,718
Level 3 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Marketable securities	0
Total assets	0	0
Level 3 [Member] | Money Market Funds [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Level 3 [Member] | U.S. Treasury securities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	0	$ 0
Marketable securities	0
Level 3 [Member] | U.S. government agency securities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities	$ 0

XML

Fair Value Measurements - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Fair Value Disclosures [Abstract]
Asset impairment charges	$ 0	$ 0	$ 0	$ 0

XML

Fair Value Measurements - Summary of Changes in Fair Value of the Level 3 Liabilities (Details) - FairValue Measurements Recurring [Member] - Level 3 [Member] - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Begining Balance	$ 1,500	$ 0	$ 0
Change in fair value of Contingent value right liability	0	1,500	0
Ending Balance	$ 1,500	$ 1,500	$ 0

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Marketable Securities - Schedule of Marketable Securities (Details) $ in Thousands	Sep. 30, 2024 USD ($)
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Amortized Cost	$ 293,942
Gross Unrealized Gains	785
Gross Unrealized Losses	(2)
Estimated Fair Value	294,725
US Treasury Securities [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Amortized Cost	187,490
Gross Unrealized Gains	519
Gross Unrealized Losses	(2)
Estimated Fair Value	188,007
US Government Agencies Debt Securities [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Amortized Cost	106,452
Gross Unrealized Gains	266
Gross Unrealized Losses	0
Estimated Fair Value	$ 106,718

XML

Marketable Securities - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($) Positions	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) Positions	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) Positions
Marketable Securities [Abstract]
Marketable Securities					$ 0
Aggregate fair value of marketable securities in unrealized loss	$ 7,000		$ 7,000		$ 0
Number of investments | Positions	1		1		0
Charges for credit-related impairments	$ 0	$ 0	$ 0	$ 0

XML

Cash, Cash Equivalents and Restricted Cash - Reconciliation of Cash and Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Cash and Cash Equivalents [Abstract]
Cash and cash equivalents	$ 192,638	$ 360,382
Restricted cash	236	234
Total cash, cash equivalents and restricted cash as shown on the consolidated statements of cash flows	$ 192,874	$ 360,616	$ 370,657	$ 194,788

XML

Property and Equipment, Net - Schedule of Property Plant and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Property Plant And Equipment [Line Items]
Less: Accumulated depreciation	$ (392)	$ (245)
Property and equipment, net	79	170
Computer Equipment
Property Plant And Equipment [Line Items]
Property and equipment	231	231
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property and equipment	$ 240	$ 184

XML

Other Accrued Expenses - Summary of Other Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Accrued Liabilities [Abstract]
Accrued employee-related expenses	$ 4,567	$ 5,790
Accrued professional fees	708	317
Accrued other	237	52
Total accrued expenses	$ 5,512	$ 6,159

XML

Development and License Agreements - Additional Information (Details) - USD ($)	1 Months Ended				3 Months Ended			9 Months Ended
	Oct. 31, 2023	May 31, 2021	Mar. 31, 2021	Sep. 30, 2019	Sep. 30, 2024	Sep. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Research and development expense					$ 24,685,000	$ 14,419,000		$ 71,874,000	$ 46,699,000
License and Stock Purchase Agreement | AbbVie
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Future milestone payment								0
Non refundable upfront fee				$ 600,000
License and Stock Purchase Agreement | AbbVie | Maximum
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Future payments upon the achievement of certain development				18,000,000
Future payments upon commercialization				45,000,000
Future payments upon sales based milestones				$ 87,500,000
License Agreement | Roche
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Future milestone payment								0
Non-refundable upfront payment		$ 4,000,000	$ 500,000
Additional consideration upon achievement of certain development and commercial milestones			120,000,000
License Agreement | Mabwell
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Future milestone payment	$ 5,000,000
Research and development expense					100,000	$ 0		100,000	$ 10,000,000
Upfront payment							$ 10,000,000
License Agreement | Mabwell | Maximum
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Certain development and regulatory milestone payments					127,500,000			127,500,000
Certain commercial milestone payments for certain licensed antibody product net sales achievements					$ 275,000,000			$ 275,000,000
Development and Regulatory Milestone First Indication | License Agreement | Roche
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Contingent payments			50,000,000
Development and Regulatory Milestone Second Indication | License Agreement | Roche
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Contingent payments			$ 35,000,000

XML

Convertible Preferred Stock - Additional Information (Details) - $ / shares	Sep. 30, 2024	Dec. 31, 2023
Class of Stock [Line Items]
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock par value (in Dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0

XML

Common Stock - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended						3 Months Ended			6 Months Ended	9 Months Ended		12 Months Ended
	Dec. 05, 2023	Jun. 30, 2024	Nov. 30, 2023	Oct. 31, 2023	Jun. 30, 2023	Feb. 28, 2023	Jan. 31, 2023	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2024	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Class of Stock [Line Items]
Common stock, shares authorized								100,000,000				100,000,000		100,000,000
Common stock, par value (in Dollars per share)								$ 0.0001				$ 0.0001		$ 0.0001
Common stock reserved for the exercise of stock options								2,972,432				2,972,432
Common stock reserved for the exercise of pre-funded warrants								204,081				204,081
Common stock, shares issued								29,748,154				29,748,154		24,360,233
Underwritten Offering [Member]
Class of Stock [Line Items]
Common stock, par value (in Dollars per share)		$ 0.0001							$ 0.0001		$ 0.0001
Common stock, shares issued		4,944,000							4,944,000		4,944,000
Shares issued, price per share		$ 36							$ 36		$ 36
Offering expenses		$ 5.5
Proceeds from sale of common stock		$ 172.5
ATM Program [Member]
Class of Stock [Line Items]
Sale of common stock, shares								0	0	234,449		376,363	825,350	141,914
Aggregate future offer, issuance and sale			$ 400.0	$ 59.7			$ 300.0
Offering expenses													$ 0.3
Proceeds from sale of common stock										$ 15.3		$ 22.5	20.0	$ 7.2
Net proceeds, after deducting placement agent fees and offering expenses										$ 14.8		$ 21.8	$ 19.5	$ 7.0
Registered Direct Offering [Member]
Class of Stock [Line Items]
Common stock, shares issued													1,229,221
Sale of common stock, shares						1,488,166
Offering expenses						$ 0.1
Sale of common stock, price per share						$ 23
Purchase of common stock for pre-funded warrants, shares						1,229,224
Sale of pre-funded warrant, price per warrant						$ 22.9999
Sale of pre funded warrant and common stock net proceeds						$ 62.4
Follow-On Public Offering [Member]
Class of Stock [Line Items]
Common stock, shares issued					3,015,919
Shares issued, price per share					$ 49
Offering expenses					$ 9.9
Purchase of common stock for pre-funded warrants, shares					204,081
Sale of pre-funded warrant, price per warrant					$ 48.9999
Sale of pre funded warrant net proceeds					$ 147.9
Pre-funded warrant, beneficiary ownership limitation percentage					19.99%
Description of initial ownership limit											Purchasers of the pre-funded warrants may also elect to set the initial Ownership Limit at 4.99%, 9.99% or 19.99%.
Minimum [Member] | ATM Program [Member]
Class of Stock [Line Items]
Aggregate future offer, issuance and sale	$ 59.7
Minimum [Member] | Registered Direct Offering [Member]
Class of Stock [Line Items]
Pre-funded warrant, beneficiary ownership limitation percentage						9.99%
Pre-funded warrant, beneficiary ownership limitation percentage under the notice period						19.99%
Minimum [Member] | Follow-On Public Offering [Member]
Class of Stock [Line Items]
Pre-funded warrant, beneficiary ownership limitation percentage					24.99%
Maximum [Member] | ATM Program [Member]
Class of Stock [Line Items]
Aggregate future offer, issuance and sale	$ 200.0						$ 100.0
Maximum [Member] | Follow-On Public Offering [Member]
Class of Stock [Line Items]
Option Shares Available To Purchase For Underwriter					420,000
Pre-funded warrant, beneficiary ownership limitation percentage					24.99%
Investors Or Affiliates [Member] | Registered Direct Offering [Member]
Class of Stock [Line Items]
Ownership of investors in company's capital stock						5.00%

XML

Stock-Based Compensation - Summary of Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	$ 4,332	$ 1,270	$ 12,481	$ 3,603
Research and Development [Member]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	1,680	455	4,909	1,167
General and Administrative [Member]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	$ 2,652	$ 815	$ 7,572	$ 2,436

XML

Stock-Based Compensation - Summary of Unrecognized Stock-based Compensation (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2024 USD ($)
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Unrecognized Expense	$ 51,873
Restricted stock units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Unrecognized Expense	$ 22,517
Weighted-Average Remaining Period of Recognition	3 years 5 months 12 days
Employee Stock Option
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Unrecognized Expense	$ 29,356
Weighted-Average Remaining Period of Recognition	2 years 11 months 4 days

XML

Stock-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands				9 Months Ended
	Sep. 16, 2024	Feb. 26, 2024	Feb. 07, 2024	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value				$ 8,300	$ 4,500
Share-based compensation arrangement exercise price				$ 25.29		$ 13.82
Weighted-average grant-date fair value of options granted				35.55	$ 25.68
Common Stock, Par or Stated Value Per Share				$ 0.0001		$ 0.0001
Aggregate fair value of restricted stock				$ 7,900	$ 2,900
Common stock shares issued				29,748,154		24,360,233
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount				$ 51,873
2021 Employee Stock Purchase Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock shares issued				11,082	0
Restricted Common Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock shares issued				63,061
Restricted Common Stock [Member] | Founders And Certain Employees [Member] | Disc Medicine Inc [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common Stock, Par or Stated Value Per Share				$ 0.0001
Restricted stock units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares available for options grant	36,666	36,666	36,666
Share-based compensation arrangement option award percentage	25.00%	25.00%	25.00%
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount				$ 22,517
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition				3 years 5 months 12 days
Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares available for options grant	55,000	55,000	55,000
Share-based compensation arrangement option award period	10 years	10 years	10 years
Share-based compensation arrangement vesting period	36 months	36 months	36 months
Share-based compensation arrangement option award percentage	25.00%	25.00%	25.00%
Share-based compensation arrangement exercise price	$ 47.68	$ 64.66	$ 65.25
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount				$ 29,356
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition				2 years 11 months 4 days

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Stock-Based Compensation - Schedule of Stock Option Activity (Details) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares
Share-Based Payment Arrangement [Abstract]
Outstanding at December 31, 2023 | shares	2,459,037
Granted | shares	796,140
Exercised | shares	(198,390)
Forfeited | shares	(71,691)
Expired | shares	(12,664)
Outstanding at September 30, 2024 | shares	2,972,432	2,459,037
Exercisable at September 30, 2024 | shares	1,571,812
Outstanding at December 31, 2023 | $ / shares	$ 13.82
Granted | $ / shares	59.76
Exercised | $ / shares	8.99
Forfeited | $ / shares	44.79
Expired | $ / shares	110.57
Outstanding at September 30, 2024 | $ / shares	25.29	$ 13.82
Exercisable at September 30, 2024 | $ / shares	$ 13.53
Weighted-Average Remaining Contractual Term, Outstanding	7 years 9 months 7 days	7 years 9 months 21 days
Exercisable at September 30, 2024	6 years 11 months 4 days
Aggregate intrinsic value, Outstanding | $	$ 80,424	$ 109,078
Exercisable at September 30, 2024 | $	$ 57,338

XML

Stock-Based Compensation - Summary of Fair Value of Stock Option Granted (Details) - $ / shares	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Risk-free interest rate	3.99%	3.87%
Expected term (in years)	6 years 4 months 20 days	7 years 1 month 20 days
Expected volatility	59.00%	59.00%
Expected dividend yield	0.00%	0.00%
Fair value per share of common stock	$ 59.76	$ 41.48

XML

Stock-Based Compensation - Schedule of Restricted Stock Unit Activity (Details) - $ / shares	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Restricted stock units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Beginning period, December 31, 2023	0
Granted	440,562
Forfeited	(11,040)
Ending period, September 30, 2024	429,522
Beginning period, December 31, 2023	$ 0
Granted	61.38
Forfeited	63.9
Ending period, September 30, 2024	$ 61.31
Restricted Common Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Beginning period, December 31, 2023	0	1,916
Vested	0	(1,916)
Ending period, September 30, 2024	0	0

XML

Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Operating Loss Carryforwards [Line Items]
State income tax expense			$ 200,000	$ 100,000
Federal income taxes	$ 0	$ 0	$ 0	$ 0

XML

Net Loss Per Share - Additional Information (Details) - shares	1 Months Ended		3 Months Ended		9 Months Ended
	Jun. 30, 2023	Feb. 28, 2023	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted-average common shares outstanding-basic			29,935,551	24,316,817	26,809,605	21,605,202
Weighted-average common shares outstanding-diluted			29,935,551	24,316,817	26,809,605	21,605,202
Exercise of pre-funded warrants shares				1,229,224		1,229,224
Shares issued upon exercise of warrants						1,229,221
Pre-funded warrants outstanding			204,081		204,081
Public Offering [Member] | Prefunded Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted-average common shares outstanding-basic	204,081
Weighted-average common shares outstanding-diluted	204,081
Registered Direct Offerings [Member] | Prefunded Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted-average common shares outstanding-basic		1,229,224
Weighted-average common shares outstanding-diluted		1,229,224

XML

Net Loss Per Share - Schedule of Antidilutive Securities Excluded from Computation of Diluted Net Loss Per Share Attributable to Common Stock holders (Details) - shares	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Restricted stock units [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities	429,522	0
Options to Purchase Common Stock [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities	2,972,432	2,558,531
Employee Stock [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities	2,436	0

XML

Leases - Additional Information (Detail) $ in Millions	1 Months Ended	9 Months Ended
	Aug. 31, 2024 USD ($) ft²	Sep. 30, 2024	Jun. 30, 2023 ft²
Lessee, Lease, Description [Line Items]
Term of operating lease			3 years 6 months
Area of office space | ft²	7,566		9,281
Additional lease liability	$ 0.1
Additional right-of-use asset	$ 0.1
Variable lease payment, terms and conditions		Variable lease payments include the Company’s allocated share of costs incurred for real estate taxes, utilities, and other operating expenses applicable to the leased premises.
Forward-Starting Lease
Lessee, Lease, Description [Line Items]
Area of office space | ft²	9,281
Undiscounted lease payments due, net	$ 1.0
Watertown Massachusetts
Lessee, Lease, Description [Line Items]
Tenant improvement allowance	0.5
Watertown Massachusetts | Forward-Starting Lease
Lessee, Lease, Description [Line Items]
Tenant improvement allowance	$ 0.3

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Related Party Transactions - Additional Information (Details) $ in Millions	Sep. 30, 2024 USD ($)
Related Party Transaction [Line Items]
Debt Instrument, Face Amount	$ 0.5
Short Term Bank Loans And NotesPayable Percentage	4.50%

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Subsequent Events - Additional Information (Details) - USD ($) $ in Millions	Nov. 06, 2024	Dec. 15, 2027	Jun. 15, 2027	Dec. 15, 2026	Sep. 15, 2026
Scenario Forecast [Member] | Hercules Loan Agreement [Member]
Subsequent Event [Line Items]
Initial advance	$ 30.0
Additional advances				$ 50.0	$ 30.0
Scenario Forecast [Member] | Hercules Loan Agreement [Member] | Tranche Two [Member]
Subsequent Event [Line Items]
Additional advances			$ 25.0
Scenario Forecast [Member] | Hercules Loan Agreement [Member] | Tranche Three [Member]
Subsequent Event [Line Items]
Additional advances		$ 40.0
Subsequent Event [Member]
Subsequent Event [Line Items]
Maturity date	Dec. 01, 2029
Interest Rate	8.25%
Change in Interest rate	2.00%
Current borrowing capacity	$ 50.0
Cash covenant	$ 1,000.0
Payment in kind interest rate	1.1
Subsequent Event [Member] | Prime Rate [Member]
Subsequent Event [Line Items]
Interest Rate	1.75%
Subsequent Event [Member] | Hercules Loan Agreement [Member]
Subsequent Event [Line Items]
Term loan facility	$ 200.0
Additional advances	$ 25.0