10-Q/A

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

______________________________________

FORM 10-Q/A

Amendment No. 2

______________________________________

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

For the quarterly period ended March 31, 2023

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: 001-39011

______________________________________

EXICURE, INC.

(Exact name of registrant as specified in its charter)

_____________________________________

Delaware	81-5333008
(State or other jurisdiction of incorporation or organization)	(IRS Employer Identification No.)

2430 N. Halsted St.

Chicago, IL 60614

(Address of principal executive offices)

Registrant’s telephone number, including area code (847) 673-1700

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, par value $0.0001 per share	XCUR	The Nasdaq Stock Market LLC

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 by Rule 12b-2 of the Exchange Act).     Yes  ☐   No  ☒

As of July 10, 2023, there were 8,648,307 shares of the registrant’s common stock, par value $0.0001 per share, outstanding.

EXPLANATORY NOTE

Explanatory Note to this Amendment No. 2

Exicure, Inc. (the “Company,” “Exicure,” “we,” “us” and “our”) is filing this Amendment No. 2 (“Amendment No. 2”) to its Quarterly Report on Form 10-Q for the three months ended March 31, 2023 initially filed on July 14, 2023 (the “Original Report”), as previously amended by Amendment No. 1 filed on May 16, 2024 (“Amendment No. 1” and as further amended by this Amendment No. 2, the “Form 10-Q/A”).

The sole purpose of this Amendment No. 2 is to include certifications from the Company’s principal executive officer and principal financial officer as Exhibits 31.1, 31.2 and 32.1. In Amendment No. 1, the Company inadvertently refiled certifications to the Original Report from its former principal executive and financial officer and omitted currently dated certifications from its current officers.

This Amendment No. 2 sets forth our Original Report, as amended, in its entirety. Except as described above and this Explanatory Note, no other changes have been made to Amendment No. 1. Items included in the Original Report that are not amended by this Amendment No. 2 and were not amended by Amendment No. 1 remain unchanged and are as of July 14, 2023. Items amended by Amendment No. 1 as described below remain unchanged and are as of May 16, 2024. This Amendment No. 2 does not reflect events occurring after the date of the Original Report or modify or update those disclosures that may be affected by subsequent events, and no other changes are being made to any other disclosure contained in the Original Report or Amendment No. 1. Therefore, this Amendment No. 2 should be read together with the Company’s other filings with the SEC that were made after the date of the Original Report and Amendment No. 1.

Explanatory Note to Amendment No. 1

Amendment No. 1 was filed by the Company to amend and restate its unaudited condensed consolidated interim financial statements for the three months ended March 31, 2023 included in the Original Report. Amendment No. 1 also amended certain other Items in the Original Report, as listed in “Items Amended in Amendment No. 1” below.

Restatement Background

As previously announced in our Current Report on Form 8-K filed with the SEC on December 1, 2023, the management of Exicure, after discussion with its Audit Committee of the Board of Directors (the “Audit Committee”), concluded that the Company’s previously issued unaudited condensed consolidated interim financial statements included in the Original Report contained an error related to classification of research and development expenses on the condensed consolidated statement of operations for the three months ended March 31, 2023. This error is described in further detail below. As a result of the error, management and the Audit Committee determined that the Company’s consolidated financial statements included in the Original Report should no longer be relied upon. Similarly, any previously furnished or filed reports, related earnings releases, investor presentations or similar communications of the Company describing those financial statements and other information covering this period should no longer be relied upon.

Approximately $0.6 million of expenses in the first quarter of 2023 were corrected from research and development into general and administrative. These expenses primarily related to legal costs and separation payments. There was no impact to the net loss as of March 31, 2023, and none of the other financial statements included in the Original Report were affected by this correction.

An explanation of the impact on the Company’s financial statements is contained in Note 1. Nature of the Business and Basis of Presentation - Restatement to the accompanying financial statements.

Internal Control Considerations

As a result of the restatement of the Company’s financial statements and the filing of Amendment No. 1, management has determined that a material weakness existed in the Company’s internal control over financial reporting. The identified material weakness and the Company’s remediation plan are further described in Part I, Item 4 within this Form 10-Q/A. In addition, as a result of the restatement of the Company’s financial statements and the

material weakness described above, management has reconsidered its assessment and now concludes that we did not maintain effective disclosure controls and procedures for the quarter ended March 31, 2023.

Items Amended in Amendment No. 1

Except as described below, there were no changes to any other parts of the Original Report in Amendment No. 1. The following items were amended in Amendment No. 1, solely as a result of and to reflect the restatement:

•Part I, Item 1. Financial Statements

•Part I, Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations

•Part I, Item 4. Controls and Procedures

•Part II, Item 1A. Risk Factors

EXICURE, INC.

QUARTERLY REPORT ON FORM 10-Q

TABLE OF CONTENTS

PART I - FINANCIAL INFORMATION	9
Item 1. Financial Statements	9
Unaudited Condensed Consolidated Balance Sheets	9
Unaudited Condensed Consolidated Statements of Operations	10
Unaudited Condensed Consolidated Statements of Comprehensive Loss	11
Unaudited Condensed Consolidated Statements of Changes in Stockholders’ Equity	12
Unaudited Condensed Consolidated Statements of Cash Flows	14
Notes to Unaudited Condensed Consolidated Financial Statements	16
Item 2. Management's Discussion and Analysis and Results of Operations	34
Item 3. Quantitative and Qualitative Disclosures About Market Risk	41
Item 4. Controls and Procedures	42
PART II - OTHER INFORMATION	44
Item 1. Legal Proceedings	44
Item 1A. Risk Factors	45
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	56
Item 3. Defaults Upon Senior Securities	56
Item 4. Mine Safety Disclosures	56
Item 5. Other Information	56
Item 6. Exhibits	57
Signatures	59

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CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10-Q, including the sections titled “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” contains express or implied “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended, (the “Exchange Act”). All statements other than statements of historical fact contained in this Quarterly Report on Form 10-Q are forward-looking statements. In some cases, you can identify forward-looking statements by terminology such as “may,” “could,” “will,” “would,” “should,” “expect,” “plan,”, “anticipate,” “believe,” “estimate,” “intend,” “predict,” “seek,” “contemplate,” “project,” “continue,” “potential,” “ongoing” or the negative of these terms or other comparable terminology. Forward-looking statements also include the assumptions underlying or relating to such statements.

Although we believe that the expectations reflected in the forward-looking statements contained herein are reasonable, such expectations or any of the forward-looking statements may prove to be incorrect and actual results could differ materially from those projected or assumed in the forward-looking statements. Our future financial condition and results of operations, as well as any forward-looking statements, are subject to inherent risks and uncertainties, including, but not limited to, the risk factors described in the “Risk Factor Summary” below and set forth in Part II, Item 1A “Risk Factors” below and for the reasons described elsewhere in this Quarterly Report on Form 10-Q. All forward-looking statements and reasons why results may differ included in this report are made as of the date hereof and we do not intend to update any forward-looking statements except as required by law. These forward-looking statements include, but are not limited to, statements concerning the following:

•substantial uncertainties regarding our exploration of strategic alternatives to maximize stockholder value, including whether we are able to identify potential partners and consummate transactions, in a timely manner or at all, whether we would be able to obtain sufficient funding to complete this process and whether any such transactions would generate value for stockholders;

•our ability to generate any meaningful value from sales, out-licensing or other transactions involving our historical assets;

•our ability to raise the substantial additional capital that is needed within the next few months to fund our operations and our pursuit of strategic alternatives, particularly given our current lack of a revenue source or committed financing and the substantial doubt about our ability to continue as a going concern;

•our ability to remain listed on The Nasdaq Capital Market (“Nasdaq”), including the ability to maintain minimum stockholders’ equity and stock price, and comply with applicable governance requirements, for continued listing on Nasdaq;

•any strategic plan or alternative that we may identify and pursue may involve unexpected costs, liabilities and/or delays and may not deliver anticipated benefits to our stockholders;

•our estimates of expenses, use of cash, timing of future cash needs, ongoing losses and capital requirements, including our expectations relating to our needs for additional financing and the timing thereof may prove to be inaccurate;

•uncertainty about reaction from investors and potential business partners to our recent change of control and board composition and the future direction of the Company, and the ability of our controlling stockholder and new board members to earn the confidence of investors and potential partners despite limited experience with U.S. public companies, and how these factors may impact our ability to obtain funding and execute any strategic alternatives that we may identify;

•potential turnover of senior management in the near term, and any inability to attract and retain qualified management and other key personnel, could create significant continuity risk and impair our ability to raise capital and execute on our exploration of strategic alternatives;

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•our ability to comply with all applicable laws, which may be particularly challenging given the recent turnover in our board, potential turnover in management, significant reductions in force, limited resources and the potential to enter into new business areas with which we have no past experience;

•our ability to obtain and maintain intellectual property protection for our technologies and our ability to operate our business without infringing the intellectual property rights of others;

•the impact of worsening macroeconomic conditions, including rising global inflation, actions taken by central banks to counter inflation, capital market and bank instability, exchange rate fluctuations, supply chain disruptions and energy and fuel prices;

•the impact of government laws and regulations as well as developments relating to our competitors or our industry; and

•other factors that may impact our financial results and condition and our ongoing strategic efforts.

These statements relate to future events or our future operational or financial performance, and involve known and unknown risks, uncertainties and other factors that may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by these forward-looking statements. Factors that may cause actual results to differ materially from current expectations include, among other things, those listed in Part II, Item 1A of this Quarterly Report on Form 10-Q under the section titled “Risk Factors” and elsewhere in this Quarterly Report on Form 10-Q.

Any forward-looking statement in this Quarterly Report on Form 10-Q reflects our current view with respect to future events and is subject to these and other risks, uncertainties and assumptions relating to our business, results of operations, industry and future growth. Given these uncertainties, you should not place undue reliance on these forward-looking statements. No forward-looking statement is a guarantee of future performance. You should read this Quarterly Report on Form 10-Q and the documents that we reference herein and have filed with the SEC as exhibits thereto completely and with the understanding that our actual future results may be materially different from any future results expressed or implied by these forward-looking statements. Except as required by law, we assume no, and specifically decline any, obligation to update or revise these forward-looking statements for any reason, even if new information becomes available in the future.

This Quarterly Report on Form 10-Q also contains or may contain estimates, projections and other information concerning our industry, our business and the markets for certain therapeutics, including data regarding the estimated size of those markets, their projected growth rates and the incidence of certain medical conditions. Information that is based on estimates, forecasts, projections or similar methodologies is inherently subject to uncertainties and actual events or circumstances may differ materially from events and circumstances reflected in this information. Unless otherwise expressly stated, we obtained these industry, business, market and other data from reports, research surveys, studies and similar data prepared by third parties, industry, medical and general publications, government data and similar sources. In some cases, we do not expressly refer to the sources from which these data are derived.

Except where the context otherwise requires, in this Quarterly Report on Form 10-Q, the “Company,” “Exicure,” “we,” “us” and “our” refers to Exicure, Inc., a Delaware corporation, and, where appropriate, our subsidiary.

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SUMMARY RISK FACTORS

Investing in common stock involves numerous risks, including the risks described in “Item 1A. Risk Factors” of this Quarterly Report on Form 10-Q. Below are some of these risks, any one of which could materially adversely affect our business, financial condition, results of operations and prospects.

•Our exploration of strategic alternatives may not be successful.

•We need to obtain substantial funding in the near term in order to continue operations and our exploration of strategic alternatives.

•Our controlling stockholder, executive officers and members of our board, have limited experience controlling or governing a public company in the United States.

•Turnover of senior management, and any inability to attract and retain qualified management and other key personnel, could impair our ability to implement our business plan.

•Our unaudited condensed consolidated financial statements have been prepared assuming that we will continue as a going concern.

•Our common stock may be delisted from Nasdaq, which could negatively impact the price of our common stock, liquidity and our ability to access the capital markets.

•We have a history of losses. We expect to continue to incur significant losses for the foreseeable future and may never achieve or maintain profitability, which could result in a decline in the market value of our common stock.

•Our internal computer systems, or those of contractors or consultants, may fail or suffer security breaches, which could result in a material disruption of our business operations.

•Our information technology systems could face disruptions that could adversely affect our business.

•Our business and operations could suffer in the event of system failures or unauthorized or inappropriate use of or access to our information technology systems.

•Increasing scrutiny and changing expectations from customers, regulators, investors, and other stakeholders with respect to our environmental, social and governance practices may impose additional costs on us or expose us to new or additional risks.

•Our current operations are concentrated in one location and any events affecting this location may have material adverse consequences.

•The investment of our cash, cash equivalents and fixed income marketable securities is subject to risks which may cause losses and affect the liquidity of these investments.

•If we fail to maintain proper and effective internal controls, our ability to produce accurate financial statements on a timely basis could be impaired.

•We currently license patent rights from Northwestern University. If Northwestern University does not properly or successfully obtain, maintain or enforce the patents underlying such licenses, or if they retain or license to others any competing rights, our competitive position and business prospects may be adversely affected.

•Our licensors, or any current or future strategic partners, may become subject to third-party claims or litigation alleging infringement of patents or other proprietary rights or seeking to invalidate patents or other proprietary rights, and we may need to resort to litigation to protect or enforce our patents or other proprietary rights, all of which could be costly, time consuming, or put our patents and other proprietary rights at risk.

•We may be subject to claims challenging the inventorship or ownership of our patents and other intellectual property.

•If we fail to comply with our obligations under any license, collaboration or other agreements, we may be required to pay damages and could lose intellectual property rights that are necessary for developing and protecting our therapeutic candidates or we could lose certain rights to grant sublicenses.

•Our status as a “controlled company” could make our Common Stock less attractive to some investors or otherwise harm the trading price of our Common Stock.

•The market price of our common stock has been, and is likely to continue to be, highly volatile, and you may not be able to resell your shares at or above the price you paid for them.

•Raising additional funds by issuing securities may cause dilution to existing stockholders and raising funds through lending and licensing arrangements may restrict our operations or require us to relinquish proprietary rights.

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•We are an “emerging growth company” and we cannot be certain if the reduced reporting requirements applicable to emerging growth companies will make our common stock less attractive to investors.

•Anti-takeover provisions in our charter documents and under the General Corporation Law of the State of Delaware could make an acquisition of us more difficult and may prevent attempts by our stockholders to replace or remove our management.

•Our amended and restated certificate of incorporation designates the Court of Chancery of the State of Delaware as the sole and exclusive forum for certain types of actions and proceedings that may be initiated by our stockholders, which could limit our stockholders’’ ability to obtain a favorable judicial forum for disputes with us or our directors, officers, employees or agents.

•Our ability to use our net operating loss carryforwards and certain other tax attributes may be limited.

•FINRA sales practice requirements may limit a stockholder’s ability to buy and sell our stock due to our low stock price.

•If securities or industry analysts do not publish research or reports about our business, or if they issue an adverse or misleading opinion regarding our stock, our stock price and trading volume could decline.

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PART I - FINANCIAL INFORMATION

Item 1. Financial Statements.

EXICURE, INC.

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except share and per share data)

	March 31, 2023		December 31, 2022
ASSETS
Current assets:
Cash and cash equivalents	$	9,960	$	8,577
Prepaid expenses and other assets	1,317		1,474
Total current assets	11,277		10,051
Property and equipment, net	2,279		2,530
Right-of-use asset	7,077		7,257
Other noncurrent assets	3,310		3,490
Total assets	$	23,943	$	23,328
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	452		361
Accrued expenses and other current liabilities	1,477		1,278
Common stock warrant liability	800		—
Total current liabilities	2,729		1,639
Lease liability, noncurrent	6,595		6,767
Total liabilities	9,324		8,406
Stockholders’ equity:
Preferred stock, $0.0001 par value per share; 10,000,000 shares authorized, no shares issued and outstanding, March 31, 2023 and December 31, 2022	—		—
Common stock, $0.0001 par value per share; 200,000,000 shares authorized, 8,371,462 issued and outstanding, March 31, 2023; 4,965,901 issued and outstanding, December 31, 2022	1		—
Additional paid-in capital	191,674		187,571
Accumulated deficit	(177,056)		(172,649)
Total stockholders’ equity	14,619		14,922
Total liabilities and stockholders’ equity	$	23,943	$	23,328

See accompanying notes to the unaudited condensed consolidated financial statements.

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EXICURE, INC.

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except share and per share data)

	Three Months Ended March 31,
	2023 (Restated)		2022
Revenue:
Collaboration revenue	$	—	$	2,565
Total revenue	—		2,565
Operating expenses:
Research and development expense	1,423		7,140
General and administrative expense	3,116		3,162
Total operating expenses	4,539		10,302
Operating loss	(4,539)		(7,737)
Other income (expense), net:
Dividend income	17		2
Interest income	11		2
Interest expense	—		(595)
Other income (expense), net	104		(20)
Total other income (expense), net	132		(611)
Net loss before provision for income taxes	(4,407)		(8,348)
Provision for income taxes	—		—
Net loss	$	(4,407)	$	(8,348)
Basic and diluted loss per common share	$	(0.70)	$	(2.07)
Weighted-average basic and diluted common shares outstanding	6,288,952		4,031,316

See accompanying notes to the unaudited condensed consolidated financial statements.

10

EXICURE, INC.

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS

(in thousands, except share and per share data)

	Three Months Ended March 31,
	2023		2022
Net loss	$	(4,407)	$	(8,348)
Other comprehensive (loss), net of taxes
Unrealized (loss) on available for sale securities, net of tax	—		(3)
Other comprehensive (loss)	—		(3)
Comprehensive loss	$	(4,407)	$	(8,351)

    See accompanying notes to the unaudited condensed consolidated financial statements.

11

EXICURE, INC.

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY

(in thousands, except shares)

	Common Stock
	Shares	$		Additional Paid-in- Capital		Accumulated Deficit		Accumulated Other Comprehensive Loss		Total Stockholders' Equity
Balance at January 1, 2023	4,965,901	$	—	$	187,571	$	(172,649)	$	—	$	14,922
Equity-based compensation	—	—		308		—		—		308
Reclassification of common stock warrants to liability	—	—		(800)		—		—		(800)
Vesting of restricted stock units and related repurchases	5,561	1		(2)		—		—		(1)
Issuance of common stock, net	3,400,000	—		4,597		—		—		4,597
Net loss	—	—		—		(4,407)		—		(4,407)
Balance at March 31, 2023	8,371,462	$	1	$	191,674	$	(177,056)	$	—	$	14,619

See accompanying notes to the unaudited condensed consolidated financial statements.

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EXICURE, INC.

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY

(in thousands, except shares)

	Common Stock
	Shares	$		Additional Paid-in- Capital		Accumulated Deficit		Accumulated Other Comprehensive Income		Total Stockholders' Equity
Balance at January 1, 2022	3,626,073	$	—	$	181,301	$	(170,067)	$	(2)	$	11,232
Exercise of common stock warrants	466,666	—		14		—		—		14
Equity-based compensation	—	—		342		—		—		342
Vesting of restricted stock units and related repurchases	324	—		(1)		—		—		(1)
Other comprehensive loss, net	—	—		—		—		(3)		(3)
Net loss	—	—		—		(8,348)		—		(8,348)
Balance at March 31, 2022	4,093,063	$	—	$	181,656	$	(178,415)	$	(5)	$	3,236

See accompanying notes to the unaudited condensed consolidated financial statements.

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EXICURE, INC.

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

	Three Months Ended March 31,
	2023		2022
Cash flows from operating activities:
Net loss	$	(4,407)	$	(8,348)
Adjustments to reconcile net loss to cash used in operating activities:
Depreciation and amortization	251		302
Equity-based compensation	308		342
Amortization of long-term debt issuance costs and fees	—		477
Amortization of right-of-use asset	180		169
Amortization of investments	—		(1)
Other	(105)		19
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	157		1,727
Other noncurrent assets	180		4
Accounts payable	91		(1,495)
Accrued expenses	199		(3,237)
Deferred revenue	—		(2,565)
Other liabilities	(172)		(150)
Net cash used in operating activities	(3,318)		(12,756)
Cash flows from investing activities:
Purchase of available for sale securities	—		(1,499)
Proceeds from sale or maturity of available for sale securities	—		3,500
Capital expenditures	—		(6)
Proceeds from sale of capital assets	106		—
Net cash provided by investing activities	106		1,995
Cash flows from financing activities:
Repayment of long-term debt	—		(7,500)
Payment of long-term debt fees and issuance costs	—		(506)
Proceeds from common stock offering	5,440		—
Payment of common stock financing costs	(843)		—
Proceeds from exercise of common stock warrants	—		14
Payments for minimum statutory tax withholding related to net share settlement of equity awards	(2)		(1)
Net cash provided by (used in) provided by financing activities	4,595		(7,993)
Net increase (decrease) in cash, cash equivalents, and restricted cash	1,383		(18,754)
Cash, cash equivalents, and restricted cash - beginning of period	9,777		43,844
Cash, cash equivalents, and restricted cash - end of period	$	11,160	$	25,090

See accompanying notes to the unaudited condensed consolidated financial statements.

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EXICURE, INC.

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (continued)

(in thousands)

	Three Months Ended March 31,
	2023		2022
Supplemental disclosure of cash flow information:
Non-cash financing activities:
Reclassification of common stock warrants to liability	$	800	$	—

The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the unaudited condensed consolidated balance sheets that sum to the total of the amounts shown in the unaudited condensed consolidated statements of cash flows:

	March 31, 2023		December 31, 2022
Cash and cash equivalents	$	9,960	$	8,577
Restricted cash included in other noncurrent assets	1,200		1,200
Total cash, cash equivalents, and restricted cash shown in the unaudited condensed consolidated statements of cash flows	$	11,160	$	9,777

See accompanying notes to the unaudited condensed consolidated financial statements.

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EXICURE, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

1. Description of Business, Basis of Presentation, Going Concern and Restatement of Financial Statement

Description of Business

Exicure, Inc. has historically been an early-stage biotechnology company focused on developing nucleic acid therapies targeting ribonucleic acid against validated targets. In September 2022, the Company announced a significant reduction in force, suspension of preclinical activities and halting of all research and development, and that the Company was exploring strategic alternatives to maximize stockholder value. While the foregoing efforts are continuing, the Company does not expect they will generate significant value for stockholders, at least in the near term. Therefore, the Company is engaging in a broader exploration of strategic alternatives. This effort involves exploring growth through transactions with potential partners that see opportunity in joining an existing, publicly-traded organization. The Company is exploring transactions in industries unrelated to its historical operations.

Throughout these unaudited condensed consolidated financial statements, the terms the “Company,” and “Exicure” refer to Exicure, Inc. and where appropriate, its wholly owned subsidiary, Exicure Operating Company. Exicure Operating Company holds all material assets and conducts all business activities and operations of Exicure, Inc. 

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements as of March 31, 2023 and December 31, 2022, and for the three months ended March 31, 2023 and 2022, have been presented in conformity with accounting principles generally accepted in the United States of America (“GAAP”).

Principles of Consolidation

The accompanying unaudited condensed consolidated financial statements include the accounts of Exicure and its wholly owned subsidiary, Exicure Operating Company. All intercompany transactions and accounts are eliminated in consolidation.

Unaudited Interim Financial Information

The accompanying interim condensed consolidated balance sheet as of March 31, 2023, the interim condensed consolidated statements of operations for the three months ended March 31, 2023 and 2022, the interim condensed consolidated statements of comprehensive loss for the three months ended March 31, 2023 and 2022, the interim condensed consolidated statements of changes in stockholders’ equity for the three months ended March 31, 2023 and 2022, and the interim condensed consolidated statements of cash flows for the three months ended March 31, 2023 and 2022 are unaudited. The interim unaudited condensed consolidated financial statements have been prepared on the same basis as the annual audited financial statements and with instructions to Form 10-Q and Article 10 of Regulation S-X under the Securities Exchange Act of 1934, as amended; and in the opinion of management, reflect all adjustments, which include only normal recurring adjustments necessary for the fair statement of the Company’s financial position as of March 31, 2023, the results of its operations for the three months ended March 31, 2023 and 2022, and the results of its cash flows for the three months ended March 31, 2023 and 2022. The financial data and other information disclosed in these notes related to the three months ended March 31, 2023 and 2022 are unaudited. The results for the three months ended March 31, 2023 are not necessarily indicative of results to be expected for the year ending December 31, 2023, or any other interim periods, or any future year or period.

Going Concern

At each reporting period, the Company evaluates whether there are conditions or events that raise substantial doubt about the Company’s ability to continue as a going concern for a period of one year after the date that the

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EXICURE, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

financial statements are issued. The Company is required to make certain additional disclosures if it concludes substantial doubt exists and it is not alleviated by the Company’s plans or when its plans alleviate substantial doubt about the Company’s ability to continue as a going concern.

The accompanying unaudited condensed consolidated financial statements have been prepared assuming that the Company will continue as a going concern for a period of one year after the date that the financial statements are issued. As of March 31, 2023, the Company has generated an accumulated deficit of $195,893 since inception and expects to incur significant expenses and negative cash flows for the foreseeable future. As of March 31, 2023, the Company’s cash, and cash equivalents were $9,960. Management believes that, given the Company’s current cash position, operating plans and forecasted negative cash flows from operating activities over the next twelve months, there is substantial doubt about the Company’s ability to continue as a going concern within one year after the date these financial statements are issued. Substantial additional financing will be needed by the Company to fund its operations.

Management believes that the Company’s existing cash and cash equivalents will fund its operating expenses into the fourth quarter of 2023. However, this estimate is based on assumptions about how the Company can limit spending that may prove to be wrong. It is very difficult to project the Company’s current cash burn rate given the transitional status of the Company and this estimate may prove inaccurate. Depending on the direction of the Company’s review of strategic alternatives, the Company may use available resources sooner than management currently expects. The Company has already engaged in significant cost reductions, so our ability to further cut costs and extend the Company’s operating runway is limited. As a result, substantial additional financing will be needed by the Company within the next few months to pay expenses, fund the ongoing exploration of strategic alternatives and pursue any alternatives that may be identified. The Company seeks to raise capital in the third quarter of 2023 to fund its operations through 2024. There can be no assurance that such additional financing will be available and, if available, can be obtained on acceptable terms.

The accompanying unaudited condensed consolidated financial statements have been prepared as though the Company will continue as a going concern, which contemplates the realization of assets and satisfaction of liabilities in the normal course of business. The financial statements do not include any adjustments relating to the recoverability and classification of recorded asset amounts or the amounts and classification of liabilities that might be necessary should the Company be unable to continue as a going concern.

Restatement

The Company is restating its previously issued condensed consolidated financial statements and related notes as of and for the three months ended March 31, 2023. The Company identified an error related to the incorrect classification of certain expenses as research and development expenses on the condensed consolidated statements of operations for the three months ended March 31, 2023.

The following table illustrates the effects of the error corrections to operating expenses:

	Previously Reported		Adjustments		Restated
Research and development expense	$	1,981	$	(558)	$	1,423
General and administrative expense	2,558		558		3,116
Total operating expenses	$	4,539	$	—	$	4,539

2. Significant Accounting Policies

The Company’s significant accounting policies are disclosed in the audited consolidated financial statements and the notes thereto, which are included in the in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022 filed with the U.S. Securities and Exchange Commission (“SEC”) on March 27, 2023, as amended by Amendment No. 1 filed with the SEC on May 1, 2023 (the “Annual Report”). Since the date of those

17

EXICURE, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

audited consolidated financial statements, there have been no material changes to the Company’s significant accounting policies.

Use of Estimates

The preparation of the financial statements in conformity with GAAP 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 financial statements and the reported amounts of revenues and expenses during the reporting period. Management bases its estimates on certain assumptions which it believes are reasonable in the circumstances and while actual results could differ from those estimates, management does not believe that any change in those assumptions in the near term would have a significant effect on the Company’s financial position, results of operations or cash flows. Actual results in future periods could differ from those estimates.

Significant estimates include the recording of its warrant liability. The Company calculated its warrant liability based on the Black-Scholes Model, see Note 7, Stockholders’ Equity, for further details.

Recent Accounting Pronouncements Adopted

Financial Instruments - Credit Losses

In June 2016, the FASB issued ASU 2016-13, Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). ASU 2016-13 is a new standard intended to improve reporting requirements specific to loans, receivables and other financial instruments. ASU 2016-13 requires that credit losses on financial assets measured at amortized cost be determined using an expected loss model, instead of the current incurred loss model, and requires that credit losses related to available-for-sale debt securities be recorded through an allowance for credit losses and limited to the amount by which carrying value exceeds fair value. ASU 2016-13 also requires enhanced disclosure of credit risk associated with financial assets. The effective date of ASU 2016-13 was deferred by ASU 2019-10, Financial Instruments—Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842)—Effective Dates to the annual period beginning after December 15, 2022 for companies that (i) meet the definition of an SEC filer and (ii) are eligible as “smaller reporting companies” as such term is defined by the SEC, with early adoption permitted. The Company adopted this ASU in January 2023, there was no material impact on the consolidated financial statements.

3. Supplemental Balance Sheet Information

Prepaid expenses and other current assets

	March 31, 2023		December 31, 2022
Prepaid clinical, contract research and manufacturing costs	$	51	$	213
Prepaid insurance	750		408
Other	516		853
Prepaid expenses and other current assets	$	1,317	$	1,474

18

EXICURE, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

Other noncurrent assets

	March 31, 2023		December 31, 2022
Restricted cash	$	1,200	$	1,200
Prepaid insurance	2,106		2,252
Other	4		38
Other noncurrent assets	$	3,310	$	3,490

Property and equipment, net

	March 31, 2023		December 31, 2022
Scientific equipment	$	5,932	$	6,087
Computers and software	63		63
Furniture and fixtures	30		30
Property and equipment, gross	6,025		6,180
Less: accumulated depreciation and amortization	(3,746)		(3,650)
Property and equipment, net	$	2,279	$	2,530

Depreciation and amortization expense was $251 and $302 for the three months ended March 31, 2023 and 2022, respectively. During the three months ended March 31, 2023, the Company sold scientific equipment with a net book value of $7 and recognized a gain of $99 in the accompanying statement of operations for the three months ended March 31, 2023.

Accrued expenses and other current liabilities

	March 31, 2023		December 31, 2022
Accrued clinical, contract research and manufacturing costs	$	10	$	48
Accrued restructuring costs	—		48
Lease liability	561		539
Accrued payroll-related expenses	184		32
Accrued federal and state tax payable	209		209
Accrued other expenses	513		402
Accrued expenses and other current liabilities	$	1,477	$	1,278

4. Debt

On March 15, 2022, pursuant to the terms of the Company’s Credit and Security Agreement, dated as of September 25, 2020, as amended on October 21, 2020, July 30, 2021, September 30, 2021, and December 10, 2021 with MidCap Financial Trust, as agent, and the lenders party thereto from time to time (as amended, the “MidCap Credit Agreement”), the Company repaid all remaining outstanding obligations under the MidCap Credit Agreement, including the outstanding principal balance of $7,500 and an exit fee of $506.

The Company paid interest on the MidCap Credit Agreement of $194 during the three months ended March 31, 2022.

19

EXICURE, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

5. Leases

The Company’s lease arrangements at March 31, 2023 consist of (i) a lease for office and laboratory space at its headquarters in Chicago, Illinois that commenced in July 2020 (the “Chicago Lease”) and (ii) a lease for office equipment (the “Office Equipment Lease”). The Chicago Lease and the Office Equipment Lease are classified as operating leases.

Chicago Lease

The Company has approximately thirty thousand square feet of office and laboratory space in Chicago, Illinois. The original term (the “Original Term”) of the Chicago Lease is 10 years, commencing on July 1, 2020 (the “Commencement Date”), which is the date the premises were ready for occupancy under the terms of the Chicago Lease. The Company has options to extend the term of the Chicago Lease for two additional successive periods of five years each (the “Extension Periods”) at the then prevailing effective market rental rate.

The initial annual base rent during the Original Term is approximately $1,113 for the first 12-month period of the Original Term, payable in monthly installments beginning on the Commencement Date. Base rent thereafter is subject to annual increases of 3%, for an aggregate amount of $12,761 over the Original Term. The Company must also pay its proportionate share of certain operating expenses and taxes for each calendar year during the term. During the first 12-month period of the Original Term, the base rent and the Company's proportionate share of operating expenses and taxes were subject to certain abatements.

The following table summarizes lease costs in the Company’s unaudited condensed consolidated statement of operations:

	Three Months Ended March 31,
	2023		2022
Operating lease costs	$	326	$	326
Variable lease costs	332		341
Short term lease costs	—		13
Total lease costs	$	658	$	680

The Company made cash payments for operating leases $646 and $872 during the three months ended March 31, 2023 and 2022, respectively.

Refer to Note 14, Subsequent Events, for more information on the Chicago Lease.

6. Restructuring

On September 26, 2022, the Company announced its commitment to a plan to wind down the Company’s research and development activities (the “September 2022 Restructuring”). This plan resulted in a reduction in force where the Company reduced approximately 66% of the Company’s existing workforce in early fourth quarter of 2022. Notified employees were offered separation benefits, including severance payments and temporary healthcare coverage assistance, the majority of which were paid in October 2022 as a lump sum payment. All of the severance costs associated with the September 2022 Restructuring represented cash expenditures and were recorded in research and development expense within the statement of operations during the third quarter of 2022.

The accrued liability balance at December 31, 2022 associated with the strategic reduction in force announced in December 2021 (the “December 2021 Restructuring”) consisted of separation benefits in the form of salary continuation pursuant to an employment agreement and was paid in January 2023.

20

EXICURE, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

The following table presents changes in the accrued restructuring liability balance for the period presented (in thousands):

	December 2021 Restructuring
Balance at December 31, 2022	$	48
Payments	(48)
Balance at March 31, 2023	$	—

7. Stockholders’ Equity

Preferred Stock

As of March 31, 2023 and December 31, 2022, the Company had 10,000,000 shares of preferred stock, par value $0.0001 authorized and no shares issued and outstanding.

Common Stock

As of March 31, 2023 and December 31, 2022, the Company had authorized 200,000,000 shares of common stock, par value $0.0001. As of March 31, 2023 and December 31, 2022, the Company had 8,371,462 shares and 4,965,901 shares issued and outstanding, respectively.

The holders of shares of the Company’s common stock are entitled to one vote per share on all matters to be voted upon by the Company’s stockholders and there are no cumulative rights. Subject to preferences that may be applicable to any outstanding preferred stock, the holders of shares of the Company’s common stock are entitled to receive ratably any dividends that may be declared from time to time by the Board of Directors (the “Board”) out of funds legally available for that purpose. In the event of the Company’s liquidation, dissolution or winding up, the holders of shares of the Company’s common stock are entitled to share ratably in all assets remaining after payment of liabilities, subject to prior distribution rights of preferred stock then outstanding. The Company’s common stock has no preemptive or conversion rights or other subscription rights. There are no redemption or sinking fund provisions applicable to the Company’s common stock. The outstanding shares of the Company’s common stock are fully paid and non-assessable.

September 2022 PIPE (Private Investment in Public Equity)

Securities Purchase Agreement

On September 26, 2022, the Company entered into a securities purchase agreement (the “September 2022 Securities Purchase Agreement”) with CBI USA, Inc. (“CBI USA”), pursuant to which the Company agreed to issue and sell to CBI USA in a private placement an aggregate of 3,400,000 shares (the “September 2022 PIPE Shares”) of its common stock, par value $0.0001 per share (the “Common Stock”), at a purchase price of $1.60 per share (the “September 2022 PIPE”).

The September 2022 PIPE closed on February 24, 2023. As a result of the closing of the September 2022 PIPE, CBI USA is the beneficial owner of approximately 50.4% of the Company’s outstanding shares. Pursuant to the board designation rights of CBI USA, CBI USA designated three members to the Company’s board of directors.

In February 2023, the Company received gross proceeds of $5,440 from the September 2022 PIPE (or net proceeds of $4,597 after transaction expenses).

21

EXICURE, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

September 2022 Registration Rights Agreement

In connection with the September 2022 PIPE, on September 26, 2022, the Company entered into a registration rights agreement (the “September 2022 Registration Rights Agreement”) with CBI USA, pursuant to which the Company agreed to register the resale of the September 2022 PIPE Shares. Under the September 2022 Registration Rights Agreement, the Company has agreed to file a registration statement covering the resale of the September 2022 PIPE Shares no later than the sixtieth (60th) day following the September 2022 PIPE Closing Date. The Company has agreed to use reasonable best efforts to cause such registration statement to become effective as promptly as practicable after the filing thereof but in any event on or prior to the Effectiveness Deadline (as defined in the September 2022 Registration Rights Agreement), and to keep such registration statement continuously effective until the earlier of (i) the date the September 2022 PIPE Shares covered by such registration statement have been sold or may be resold pursuant to Rule 144 without restriction, or (ii) the date that is two (2) years following the September 2022 PIPE Closing Date. The Company has also agreed, among other things, to pay all reasonable fees and expenses (excluding any underwriters’ discounts and commissions and all fees and expenses of legal counsel, accountants and other advisors for CBI USA except as specifically provided in the September 2022 Registration Rights Agreement) incident to the performance of or compliance with the September 2022 Registration Rights Agreement by the Company.

In the event the registration statement has not been filed within 90 days following the September 2022 PIPE Closing Date, subject to certain limited exceptions, then the Company has agreed to make pro rata payments to CBI USA as liquidated damages in an amount equal to 0.5% of the aggregate amount invested by CBI USA in the September 2022 PIPE Shares per 30-day period or pro rata for any portion thereof for each such month during which such event continues, subject to certain caps set forth in the September 2022 Registration Rights Agreement.

The Company has granted CBI USA customary indemnification rights in connection with the registration statement. CBI USA has also granted the Company customary indemnification rights in connection with the registration statement.

May 2022 PIPE

Securities Purchase Agreement

On May 9, 2022, the Company entered into a securities purchase agreement (the “May 2022 Securities Purchase Agreement”) with certain accredited investors (the “Investors”), pursuant to which the Company agreed to issue and sell to the Investors in a private placement an aggregate of 867,369 shares (the “May 2022 PIPE Shares”) of the Company’s Common Stock, par value $0.0001 per share, at a purchase price of $5.81 per share (the “May 2022 PIPE”). The May 2022 PIPE closed on May 18, 2022 (the “May 2022 PIPE Closing Date”). The Company received aggregate net proceeds from the May 2022 PIPE of approximately $4,886 after deducting transaction-related expenses.

Pursuant to the May 2022 Securities Purchase Agreement, in connection with the May 2022 PIPE, CBI USA will have the right to nominate a member to the Board, subject to the approval by the Board and provided such nominee qualifies as an “independent” director under Nasdaq Listing Rule 5605(a)(2), effective as of the May 2022 PIPE Closing Date. CBI USA will also have the right, effective as of the May 2022 PIPE Closing Date, to designate one individual to attend all meetings of the Board in a non-voting observer capacity.

Registration Rights Agreement

Also, on May 9, 2022, the Company entered into a registration rights agreement (the “May 2022 Registration Rights Agreement”) with the Investors, pursuant to which the Company agreed to register the resale of the May 2022 PIPE Shares. Under the May 2022 Registration Rights Agreement, the Company agreed to file a registration statement covering the resale of the Shares no later than July 18, 2022. On July 11, 2022, the Company filed a registration statement on Form S-3 with the SEC for the resale of the Shares and caused the registration statement to become effective on July 20, 2022.

22

EXICURE, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

The Company has granted the Investors customary indemnification rights in connection with the registration statement. The Investors have also granted the Company customary indemnification rights in connection with the registration statement.

Registered Direct Offering

On December 16, 2021, the Company completed a securities purchase agreement (the “Purchase Agreement”) with certain institutional purchasers (the “Purchasers”) entered into on December 14, 2021, pursuant to which the Company offered to the Purchasers, in a registered direct offering priced at-the-market consistent with the rules of Nasdaq (the “Registered Direct Offering”), (i) an aggregate of 433,553 shares (the “Shares”) of the Company’s common stock, $0.0001 par value per share, (ii) pre-funded warrants to purchase up to an aggregate of 718,981 shares of Common Stock (the “Pre-Funded Warrants”), and (iii) warrants to purchase up to 576,261 shares of Common Stock (the “Warrants”). The combined purchase price of each share of Common Stock and accompanying Warrant is $9.9780 per share. The combined purchase price of each Pre-Funded Warrant and accompanying Warrant is $9.9480 (equal to the combined purchase price per share of Common Stock and accompanying Warrant, minus $0.03). The per share exercise price for the Warrants is $8.1031, the closing bid price of the Company’s Common Stock on December 13, 2021 (and as adjusted for the reverse stock split referenced in Note 1). The Warrants will be exercisable immediately from the closing December 16, 2021, and will expire on the five-year anniversary of the date of issuance, or December 16, 2026. The Pre-Funded Warrants and Warrants, which met equity classification, were recognized as a component of permanent stockholders’ equity within additional paid-in-capital together with the net proceeds from the Registered Direct Offering. The gross proceeds to the Company from the Registered Direct Offering (excluding effect of subsequent exercises of pre-funded warrants) were $11,478 and net proceeds after deducting the placement agent’s fees and other offering expenses paid or payable by the Company were $10,226. The securities were offered by the Company pursuant to an effective shelf registration statement on Form S-3 (File No. 333-251555) previously filed with the Securities and Exchange Commission (the “SEC”) on December 21, 2020, and which was declared effective by the SEC on January 7, 2021 (the “Registration Statement”).

Each Warrant is exercisable for one share of Common Stock at an exercise price of $8.1031 per share. The Warrants are immediately exercisable as of the date of issuance of December 16, 2021 and will expire on the five-year anniversary of the date of issuance, or December 16, 2026. The Pre-Funded Warrants were offered in lieu of shares of Common Stock to one of the Purchasers whose purchase of shares of Common Stock in the Registered Direct Offering would otherwise result in said Purchaser, together with its affiliates and certain related parties, beneficially owning more than 4.99% (or, at the election of the Purchaser, 9.99%) of the Company’s outstanding Common Stock immediately following the consummation of the Registered Direct Offering. Each Pre-Funded Warrant is exercisable for one share of Common Stock at an exercise price of $0.030 per share. The Pre-Funded Warrants are immediately exercisable and may be exercised at any time until all of the Pre-Funded Warrants are exercised in full.

A holder (together with its affiliates) of the Warrant or Pre-Funded Warrant may not exercise any portion of the Warrant or Pre-Funded Warrant, as applicable, to the extent that the holder would own more than 4.99% (or, at the holder’s option upon issuance, 9.99%) of the Company’s outstanding Common Stock immediately after exercise, as such percentage ownership is determined in accordance with the terms of the Warrant or Pre-Funded Warrant, as applicable. In lieu of making the cash payment otherwise contemplated to be made to the Company upon exercise of a Warrant in payment of the aggregate exercise price, the holder may elect instead to receive upon such exercise (either in whole or in part) the net number of shares of Common Stock determined according to a formula set forth in the Warrants, provided that such cashless exercise shall only be permitted if the Registration Statement is not effective at the time of such exercise or if the prospectus to which the Registration Statement is a part is not available for the issuance of shares of Common Stock to the Warrant holder.

In lieu of making the cash payment otherwise contemplated to be made to the Company upon exercise of a Pre-Funded Warrant in payment of the aggregate exercise price, the holder may elect instead to receive upon such exercise (either in whole or in part) the net number of shares of Common Stock determined according to a formula set forth in the Pre-Funded Warrants.

23

EXICURE, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

Common Stock Warrants

In January 2022, Pre-Funded Warrants were exercised for a total exercise price of $14, resulting in the issuance of 466,666 shares of common stock. As of March 31, 2023, there are no unexercised pre-funded warrants that are outstanding.

As of March 31, 2023, warrants to purchase 576,261 shares of common stock at a price of $8.1031 per share that were acquired in the December 2021 registered-direct offering transaction remain outstanding. The warrants are classified as equity. As a result of the closing of the September 2022 PIPE, a warrant holder elected to exercise their option within 30 days of the closing of the September 2022 PIPE (February 24, 2023) to receive a cash payout for the outstanding warrants in the amount of the Black-Scholes value of each warrant as prescribed in the warrant agreement. The Company paid $800 to the warrant holder on June 23, 2023.

Accumulated Other Comprehensive Income (Loss)

The following table summarizes the changes in each component of accumulated other comprehensive loss, net of tax, for 2023:

	Unrealized losses on short-term investments
Balance at December 31, 2022	$	—
Other comprehensive loss	—
Net current period other comprehensive income	—
Balance at March 31, 2023	$	—

The following table summarizes the changes in each component of accumulated other comprehensive income (loss), net of tax, for 2022:

	Unrealized gains (losses) on short-term investments
Balance at December 31, 2021	$	(2)
Other comprehensive loss	(3)
Net current period other comprehensive loss	(3)
Balance at March 31, 2022	$	(5)

24

EXICURE, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

8. Equity-Based Compensation

2017 Equity Incentive Plan

On September 22, 2017, the Company’s stockholders approved the Exicure, Inc. 2017 Equity Incentive Plan (the “2017 Plan”), which became effective on November 15, 2017. The 2017 Plan provides for the issuance of incentive awards of up to 194,750 shares of Exicure common stock, which includes 72,330 shares of Exicure common stock to be issued to officers, employees, consultants and directors, plus a number of shares not to exceed 122,793 that are subject to issued and outstanding awards under the Exicure OpCo 2015 Equity Incentive Plan (the “2015 Plan”) and were assumed in the merger transaction on September 26, 2017. Awards that may be awarded under the 2017 Equity Incentive Plan include non-qualified and incentive stock options, stock appreciation rights, bonus shares, restricted stock, restricted stock units, performance units and cash-based awards. The number of shares of common stock reserved for issuance under the 2017 Equity Incentive Plan automatically increases on January 1 of each year, beginning on January 1, 2020, by the lesser of (i) 153,333 shares, (ii) 5% of the total number of shares of its capital stock outstanding on December 31 of the preceding calendar year, or (iii) a lesser number of shares determined by the Compensation Committee of the Board (the “Compensation Committee”). No future awards will be made under the 2015 Plan upon the effectiveness of the 2017 Plan. On January 1, 2023, pursuant to the terms of the 2017 Plan, the number of awards that are reserved and may be awarded under the 2017 Plan was automatically increased by 153,333 awards.         

As of March 31, 2023, the aggregate number of equity awards available for grant under the 2017 Equity Incentive Plan was 439,075.

Awards granted under the 2017 Plan are contingent on the participants’ continued employment or provision of non-employee services and are subject to forfeiture if employment or continued service terminates for any reason. The initial award granted to an employee or consultant generally vests 25% on the first 12-month anniversary of the grant date and vests 1/48th monthly thereafter until fully vested at the end of 48 months. Subsequent awards granted to employees or consultants generally vest 1/48th monthly until fully vested at the end of 48 months. The initial stock option grant to a non-employee director vests 1/36th monthly until fully vested at the end of 36 months. Subsequent stock option grants to a non-employee director vests 1/12th monthly until fully vested at the end of 12 months. The term of common stock option grants is 10 years unless terminated earlier as described above.

Employee Stock Purchase Plan

The 2017 Employee Stock Purchase Plan (the “ESPP”) was adopted by the Board in September 2017 and approved by the Company’s stockholders in September 2017. Through the ESPP, eligible employees may authorize payroll deductions of up to 15% of their compensation to purchase common stock. The maximum number of shares that an employee may purchase on any exercise date in an offer period will be the smaller of (i) 250 shares or (ii) such number of shares as has a fair market value (determined as of the offering date for such offer period) equal to $25,000 within one calendar year minus the fair market value of any other shares of common stock that are attributed to such calendar year. The purchase price per share at each purchase date is equal to 85% of the lower of (i) the closing market price per share of Exicure common stock on the employee’s offering date or (ii) the closing market price per share of Exicure common stock on the exercise date.

The ESPP provides that the number of shares reserved and available for issuance will automatically increase each January 1, beginning on January 1, 2018 and each January 1 thereafter through January 1, 2027, by the least of (i) 10,000 shares; (ii) 0.3% of the outstanding shares of common stock on the last day of the immediately preceding calendar year; or (iii) a lesser number of shares determined by the Board. On January 1, 2023, the number of shares of common stock available for issuance under the ESPP increased by 10,000 shares. As of March 31, 2023, there were 51,971 shares available for issuance under the ESPP.

25

EXICURE, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

Equity-based compensation expense is classified in the statements of operations as follows:

	Three Months Ended March 31,
	2023		2022
Research and development expense	$	154	$	160
General and administrative expense	154		182
	$	308	$	342

Unamortized equity-based compensation expense at March 31, 2023 was $1,415, which is expected to be amortized over a weighted-average period of 2.6 years.

The Company utilizes the Black-Scholes option-pricing model to determine the fair value of common stock option grants. The Black-Scholes option-pricing model was developed for use in estimating the fair value of traded options that have no vesting restrictions and are fully transferable. The model also requires the input of highly subjective assumptions. The following table presents the assumptions used in the Black-Scholes option-pricing model for stock options granted during the three months ended March 31, 2023; there were no stock options granted during the three months ended March 31, 2022:

	Three Months Ended March 31,
	2023
Expected term	5.8 to 5.8 years
Risk-free interest rate	3.83% to 3.83%; weighted avg. 3.83%
Expected volatility	101.0% to 101.0%; weighted avg. 101.0%
Forfeiture rate	5	%
Expected dividend yield	—	%

The expected term is based upon the “simplified method” as described in Staff Accounting Bulletin Topic 14.D.2. Currently, the Company does not have sufficient experience to provide a reasonable estimate of an expected term of its common stock options. The Company will continue to use the “simplified method” until there is sufficient experience to provide a more reasonable estimate in conformance with ASC 718-10-30-25 through 30-26. The risk-free interest rate assumptions were based on the U.S. Treasury bond rate appropriate for the expected term in effect at the time of grant. For stock options granted after December 31, 2021, the expected volatility is based on the volatility of shares of the Company. For stock options granted prior to January 1, 2022, the expected volatility is based on calculated enterprise value volatilities for publicly traded companies in the same industry and general stage of development. The estimated forfeiture rates were based on historical experience for similar classes of employees. The dividend yield was based on expected dividends at the time of grant.

The fair value of the underlying common stock and the exercise price for the common stock options granted during the three months ended March 31, 2023 are summarized in the table below. There were no stock options granted during the three months ended March 31, 2022.

Common Stock Options Granted During Period Ended:	Fair Value of Underlying Common Stock	Exercise Price of Common Stock Option
Three months ended March 31, 2023	$1.58; weighted avg. $1.58	$1.58; weighted avg. $1.58

26

EXICURE, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

The weighted-average grant date fair value of common stock options granted in the three months ended March 31, 2023 was $1.26 per common stock option.

A summary of common stock option activity as of the periods indicated is as follows:

	Options	Weighted-Average Exercise Price (1)		Weighted-Average Remaining Contractual Term (years)	Aggregate Intrinsic Value (thousands)
Outstanding - December 31, 2022	222,833	$	4.74	7.5	$	—
Granted	10,000	1.58
Exercised	—	—
Forfeited	(29,427)	5.55
Outstanding - March 31, 2023	203,406	$	4.46	6.7	$	—
Exercisable - March 31, 2023	84,469	$	5.40	3.5	$	—
Vested and Expected to Vest - March 31, 2023	196,229	$	4.49	6.6	$	—

(1) On March 24, 2022, the Company’s Board of Directors unanimously approved the repricing of all outstanding and unexercised stock options granted under our 2015 Equity Incentive Plan and 2017 Equity Incentive Plan and held by its current employees, executive officers, and directors. Effective April 1, 2022, the exercise price of the eligible stock options was reduced to $5.51, the closing price of our common stock on April 1, 2022. See below section titled “Repricing of Outstanding and Unexercised Options” for more information.

A summary of restricted stock unit activity of the periods indicated is as follows:

	Restricted Stock Units	Weighted-Average Grant Date Fair Value
Unvested balance - December 31, 2022	20,885	$	12.65
Granted	—	—
Settled	(8,493)	14.24
Forfeited	(3,608)	14.58
Unvested balance - March 31, 2023	8,784	$	4.02

27

EXICURE, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

The grant date fair value of restricted stock units is based on the Company’s closing stock price at the date of grant. At vesting, each outstanding restricted stock unit will be exchanged for one share of the Company’s common stock. Restricted stock units generally vest evenly on a quarterly basis over a period of 4 years in exchange for continued service provided by the restricted stock unit recipient during that vesting period.

A summary of performance-based restricted stock unit activity of the periods indicated is as follows:

	Performance-Based Restricted Stock Units	Weighted-Average Grant Date Fair Value
Unvested balance - December 31, 2022	97,643	$	3.45
Granted	—	—
Unvested balance - March 31, 2023	97,643	$	3.45

The grant date fair value of performance-based restricted stock units is based on the Company’s closing stock price at the date of grant. At vesting, each outstanding restricted stock unit will be exchanged for one share of the Company’s common stock. Certain performance metrics must be met by the performance measurement date in 2023 in order for the performance-based restricted stock units granted during 2022 to vest as follows: one-third on May 16, 2023, one-third on May 16, 2024, and one-third on May 16, 2025, in exchange for continued service provided by the performance-based restricted stock unit recipient during that vesting period.

Repricing of Outstanding and Unexercised Options

On March 24, 2022, the Board unanimously approved the repricing of all outstanding and unexercised stock options granted under the 2015 Plan and 2017 Plan (the “Plans”) and held by current employees, executive officers, and directors of the Company (the “Eligible Stock Options”). Effective April 1, 2022, the exercise price of the eligible stock options was reduced to $5.51, the closing price of its common stock on April 1, 2022. Except for the modification to the exercise price of the Eligible Stock Options, all other terms and conditions of each of the Eligible Stock Options will remain in full force and effect.

Pursuant to the Plans, the Board, as the administrator of the Plans, has discretionary authority, exercisable on such terms and conditions that it deems appropriate under the circumstances, to reduce the exercise price in effect for outstanding options under the Plans. In approving the repricing, the Board considered the impact of the current exercise prices of outstanding stock options on the incentives provided to employees and directors, the lack of retention value provided by the outstanding stock options to employees and directors, and the impact of such options on the capital structure of the Company. As of March 24, 2022, there were 233,224 stock options outstanding under the Plans, and all of the Company’s outstanding stock options had exercise prices in excess of the current fair market value of the Company’s common stock as of March 24, 2022, which is why the Board made the determination to deem all outstanding and unexercised stock options held by current employees, executive officers, and directors as Eligible Stock Options.

Matthias Schroff, the Company’s former Chief Executive Officer, and Elias Papadimas, the Company’s former Chief Financial Officer, hold Eligible Stock Options exercisable into an aggregate of 29,373 and 12,513 shares of the Company’s common stock, respectively. Former non-employee directors, Jeffrey Cleland, Elizabeth Garofalo, Bali Muralidhar and James Sulat, hold Eligible Stock Options exercisable into an aggregate of 3,835, 5,000, 3,835 and 3,112 shares of the Company’s common stock, respectively.

9. Income Taxes

The Company incurred a pretax loss in each of the three ended March 31, 2023 and 2022, which consists entirely of loss in the United States and resulted in no provision for income tax expense during the periods then

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EXICURE, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

ended. The effective tax rate is 0% in each of the three ended March 31, 2023 and 2022 because the Company has generated tax losses and has provided a full valuation allowance against its deferred tax assets.

10. Loss Per Common Share

Basic loss per common share is calculated by dividing net loss by the weighted-average number of shares of common stock outstanding during the period. Diluted loss per common share is calculated using the treasury share method by giving effect to all potentially dilutive securities that were outstanding. Potentially dilutive options, restricted stock units and warrants to purchase common stock that were outstanding during the periods presented were excluded from the diluted loss per share calculation for the periods presented because such shares had an anti-dilutive effect due to the net loss reported in those periods. Therefore, basic and diluted loss per common share is the same for each of the three months ended March 31, 2023 and 2022.

The following is the computation of loss per common share for the three months ended March 31, 2023 and 2022:

	Three Months Ended March 31,
	2023		2022
Net loss	$	(4,407)	$	(8,348)
Weighted-average basic and diluted common shares outstanding	6,288,952		4,031,316
Loss per share - basic and diluted	$	(0.70)	$	(2.07)

The outstanding securities presented below were excluded from the calculation of loss per common share, for the periods presented, because such securities would have been anti-dilutive due to the Company’s loss per share during that period:

	As of March 31,
	2023	2022
Options to purchase common stock	203,406	232,271
Restricted stock units	8,784	9,612
Performance stock units	97,643	—
Warrants to purchase common stock	576,261	576,261

11. Fair Value Measurements

ASC Topic 820, Fair Value Measurement, establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value, as follows: Level 1 Inputs - unadjusted quoted prices in active markets for identical assets or liabilities accessible to the reporting entity at the measurement date; Level 2 Inputs - other than quoted prices included in Level 1 inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the asset or liability; and Level 3 Inputs - unobservable inputs for the asset or liability used to measure fair value to the extent that observable inputs are not available, thereby allowing for situations in which there is little, if any, market activity for the asset or liability at measurement date.

29

EXICURE, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

Assets measured at fair value on a recurring basis as of March 31, 2023 are as follows:

	Total		Level 1		Level 2		Level 3
Assets
Cash equivalents:
Money market funds	$	1,629	$	1,629	$	—	$	—
Total financial assets	$	1,629	$	1,629	$	—	$	—

Assets measured at fair value on a recurring basis as of December 31, 2022 are as follows:

	Total		Level 1		Level 2		Level 3
Assets
Cash equivalents:
Money market funds	$	1,612	$	1,612	$	—	$	—
Total financial assets	$	1,612	$	1,612	$	—	$	—

Liabilities measured at fair value on a recurring basis as of March 31, 2023 are as follows:

	Total		Level 1		Level 2		Level 3
Liabilities
Common stock warrant liability:
Warranty liability	$	800	$	—	$	—	$	800
Total financial liability	$	800	$	—	$	—	$	800

The Company uses the market approach and Level 1 and Level 2 inputs to value its cash equivalents and Level 2 inputs to value its short-term investments. The Company uses the market approach and Level 3 inputs to value its liabilities. There were no liabilities measured at fair value on a recurring basis as of December 31, 2022. The Company’s long-term debt bore interest at the prevailing market rates for instruments with similar characteristics and, accordingly, the carrying value for this instrument also approximates its fair value and the financial measurement is also classified within Level 2 of the fair value hierarchy.

Warrant Liability

Significant inputs related to the Company’s liability classified warrants are listed below. There were no changes from the amounts on the initial measurement date to March 31, 2023.

	March 31, 2023
Expected term	4.22
Volatility	164.63		%
Value of underlying shares	$	1.84
Risk free interest rate	1.93		%
Expected dividend yield	—		%

30

EXICURE, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

A summary of the warrant liability activity for the three months ended March 31, 2023, is as follows:

	Warrants Outstanding	Fair Value Per Share		Fair Value
(in thousands, except per share data)
Balance at December 31, 2022	—	$	—	$	—
Option to exercise	526	$	1.52	$	800
Balance at March 31, 2023	526	$	1.52	$	800

12. Commitments and Contingencies

Legal Proceedings

On December 13, 2021, Mark Colwell filed a putative securities class action lawsuit against the Company, David A. Giljohann and Brian C. Bock in the United States District Court for the Northern District of Illinois, captioned Colwell v. Exicure, Inc. et al., Case No. 1:21-cv-0663. On February 4, 2021, plaintiff filed an amended putative securities class action complaint. On March 20, 2023, the court entered an order appointing James Mathew as lead plaintiff and Bleichmar Fonti & Auld LLP as lead counsel in the action pursuant to the Private Securities Litigation Reform Act of 1995. On May 26, 2023, lead plaintiff filed a second amended complaint against the Company, Dr. Giljohann, Mr. Bock, and Grant Corbett. The second amended complaint alleges that Dr. Giljohann, Mr. Bock, and Dr. Corbett made materially false and/or misleading statements related to the Company’s clinical programs purportedly causing losses to investors who acquired Company securities between January 7, 2021 and December 10, 2021. The second amended complaint does not quantify any alleged damages but, in addition to attorneys’ fees and costs, lead plaintiff seeks to recover damages on behalf of himself and others who acquired the Company’s stock during the putative class period at allegedly inflated prices and purportedly suffered financial harm as a result. The Company intends to move to dismiss the complaint.

On March 1, 2022, Kapil Puri filed a shareholder derivative lawsuit on behalf of the Company in the United States District Court for the Northern District of Illinois, against Dr. Giljohann and Mr. Bock, Jeffrey L. Cleland, Elizabeth Garofalo, Bosun Hau, Bali Muralidhar, Andrew Sassine, Matthias Schroff, James Sulat and Timothy Walbert, captioned Puri v. Giljohann, et al., Case No. 1:22-cv-01083. On March 8, 2022, Yixin Sim filed a similar shareholder derivative lawsuit in the same court against the same individuals, captioned Sim v. Giljohann, et al., Case No. 1:22-cv-01217. On April 25, 2022, Stourbridge Investments LLC filed a similar shareholder derivative lawsuit against the same individuals in the United States District Court for the District of Delaware, captioned Stourbridge Investments LLC v. Exicure, Inc. et al., Case No. 1:22-cv-00526. Based on similar factual allegations presented in the Colwell complaint, described above, the Puri, Sim, and Stourbridge complaints (collectively, the “Derivative Complaints”) allege that the defendants caused the Company to issue false and/or misleading statements in the proxy statement for its 2021 Annual Meeting of Stockholders regarding risk oversight, code of conduct, clinical program and compensation matters, among other things, in violation of federal securities law, and committed breaches of fiduciary duties. The Derivative Complaints also assert that Dr. Giljohann and Mr. Bock are liable for contribution under the federal securities laws. The Puri and Stourbridge complaints further assert state law claims for unjust enrichment, and the Puri complaint additionally asserts state law claims for abuse of control, gross mismanagement and corporate waste. The plaintiffs do not quantify any alleged damages in the Derivative Complaints, but seek restitution for damages to the Company, attorneys’ fees, costs, and expenses, as well as an order directing that certain proposals for strengthening board oversight be put to a vote of the Company’s shareholders.

On March 18, 2022, James McNabb, through counsel, sent a written demand to the Company (the “Demand Letter”) demanding that the Board of Directors investigate certain allegations and commence proceedings on the Company’s behalf against certain of the Company’s current officers and directors for alleged breaches of fiduciary duties and corporate waste. All of the Derivative Cases have been stayed pending a decision on any motion to dismiss that may be filed in the Puri case. In addition, the Stourbridge case has been administratively closed pending

31

EXICURE, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

the decision on motion to dismiss that may be filed in the Puri case. Further, pursuant to agreement, the Demand Letter is being held in abeyance and any related statute of limitations tolled pending such motion and decision.

In June 2023, a director of the Company designated by CBI USA served a demand on the Company to access certain books and records pursuant to Section 220(d) of the Delaware General Corporation Law. The Company served its response and is working with the director to resolve this demand amicably and in accordance with the Company’s obligations under Delaware law.

Northwestern University License Agreements

On December 12, 2011, (1) AuraSense, LLC, the Company’s former parent, assigned to the Company all of its worldwide rights and interests under AuraSense, LLC’s 2009 license agreement with Northwestern University (“NU”) in the field of the use of nanoparticles, nanotechnology, microtechnology or nanomaterial-based constructs as therapeutics or accompanying therapeutics as a means of delivery, but expressly excluding diagnostics (the “assigned field”); (2) in accordance with the terms and conditions of this assignment, the Company assumed all liabilities and obligations of AuraSense, LLC as set forth in its license agreement in the assigned field; and (3) in order to secure this assignment and the patent rights from NU, the Company agreed (i) to pay NU an annual license fee, which may be credited against any royalties due to NU in the same year, (ii) to reimburse NU for expenses associated with the prosecution and maintenance of the license patent rights, (iii) to pay NU royalties based on any net revenue generated by the Company’s sale or transfer of any licensed product, (iv) to pay NU, in the event the Company grants a sublicense under the licensed patent rights, the greater of a percentage of all sublicensee royalties or a percentage of any net revenue generated by a sublicensee’s sale or transfer of any licensed product, and (v) to pay NU a percentage of all other sublicense payments received by the Company. In August 2015, the Company entered into a restated license agreement with NU (the “Restated License Agreement”). In February 2016, the Company obtained exclusive license as to NU’s rights in certain SNA technology it jointly owns with NU (the “Co-owned Technology License”). The Company’s license to NU’s rights is limited to the assigned field, however the Company has no such limitation as to its own rights in this jointly owned technology. The Company’s rights and obligations in the Co-owned Technology License agreement is substantially the same as in the Restated License Agreement from August 2015 (collectively referred to as “the Northwestern University License Agreements”). As of March 31, 2023, the Company has paid to NU an aggregate of $11,540 in consideration of each of the obligations described above.

Leases

Refer to Note 5, Leases, for a discussion of the commitments associated with the Company’s lease agreements.

13. Related-Party Transactions

Pursuant to a Consulting Agreement, effective as of September 25, 2022, between the Company and Alta Companies LTD (“Alta”), the Company paid Alta $218 on February 27, 2023 for a consulting fee earned as a result of the September 2022 PIPE closing. Paul Kang, a director of the Company since February 2023, is the President of Alta.

14. Subsequent Events

Sublease of Office Space

The Company entered into a sublease agreement with Cyclopure, Inc. (the “Subtenant”) to sublease approximately 57% of its office space pursuant to that certain sublease agreement (the “Sublease Agreement”), dated as of May 4, 2023. The term of the Sublease Agreement began on May 15, 2023 and ends on June 30, 2030, the expiration date of the Chicago Lease. The first three months under the Sublease Agreement are rent free. Beginning August 15, 2023, the Company will charge the Subtenant for 57% of the base rent under the Chicago Lease, and the subtenant is responsible for its pro rata share of operating expenses and taxes payable.

32

EXICURE, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

Purchase of Convertible Bonds

On May 3, 2023, the Company entered into a subscription agreement (the “Subscription Agreement”) with Cyworld Z Co., Ltd., (“Cyworld Z”). Pursuant to the Subscription Agreement, the Company purchased non-guaranteed private placement convertible bonds (the “Bonds”) of Cyworld Z for a subscription amount of $1 million. The Bonds mature on May 2, 2026 and the yield to maturity is 4.5% per annum. The Company will also have the put option to request Cyworld Z to redeem part or the entire principal amount of the Bonds on the first anniversary after the issue date and every three months thereafter before the maturity date. The conversion ratio will be one hundred percent (100%) of the Bond’s face value.

On May 16, 2023, the Company entered into a second subscription agreement (“Second Subscription Agreement”) with Cyworld Z. Pursuant to the Second Subscription Agreement, the Company purchased non-guaranteed private placement convertible bonds (the “Bonds”) of Cyworld Z for a subscription amount for an additional $1 million. The Bonds mature on May 15, 2026 and the yield to maturity is 4.5% per annum. The Company will also have the put option to request Cyworld Z to redeem part or the entire principal amount of the Bonds on the first anniversary after the issue date and every three months thereafter before the maturity date. The conversion ratio will be one hundred percent (100%) of the Bond’s face value.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

The following information should be read in conjunction with our unaudited condensed consolidated financial statements and the notes thereto included in this Quarterly Report on Form 10-Q and the audited financial information and the notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2022, which was filed with the Securities and Exchange Commission, or SEC, on March 27, 2023, as amended by Amendment No. 1 filed with the SEC on May 1, 2023 (the “Annual Report”). This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, or the Securities Act, and Section 21E of the Securities Exchange Act of 1934, as amended, or the Exchange Act, that involve significant risks and uncertainties. Our actual results, performance or experience could differ materially from what is indicated by any forward-looking statement due to various important factors, risks, uncertainties, assumptions and other factors including, but not limited to, those identified in this Quarterly Report on Form 10-Q and those set forth under the section titled “Risk Factors” in Part II, Item 1A of this Quarterly Report on Form 10-Q and in our other SEC filings.

Overview

Historically, we have been an early-stage biotechnology company focused on developing nucleic acid therapies targeting ribonucleic acid against validated targets. In September 2022, we announced a significant reduction in force, suspension of preclinical activities and halting of all research and development, and that we were exploring strategic alternatives to maximize stockholder value. While the foregoing efforts are continuing, we do not expect they will generate significant value for stockholders, in the near term. Therefore, we are engaging in a broader exploration of strategic alternatives. This effort involves exploring growth through transactions with potential partners that see opportunity in joining an existing, publicly-traded organization. We are exploring transactions in industries unrelated to our historical operations.

Because we currently have no source of revenue or committed financing, we will require substantial additional funding within the next several months in order to continue our exploration of strategic alternatives and consummate any transactions that we may identify.

Operating, financing, and cash flow considerations

Since our inception in 2011, we have primarily funded our operations through sales of our securities, loans and collaborations. As of March 31, 2023, our cash, cash equivalents, and restricted cash were $11.2 million. On February 24, 2023, we raised gross proceeds of $5.4 million on the closing of the Private Placement (as defined below) (or net proceeds of approximately $4.6 million after transaction expenses) and expect to use the net proceeds for general working capital purposes as we pursue strategic alternatives as well as for the payout for warrant put rights that were exercised as a result of the change of control.

Our current liquidity is not sufficient to fund operations over the next twelve months from the date of the issuance of the accompanying consolidated financial statements. As a result, there is substantial doubt about our ability to continue as a going concern. Substantial additional financing will be needed within the next several months to fund our operations and ongoing exploration of strategic alternatives and pursue any alternatives that we identify. If we are unable to raise capital, the Company may seek bankruptcy protection in the near term, which may result in the Company’s stockholders receiving no or very little value in respect of their shares of the Company’s common stock.

We expect to seek financing through equity offerings. However, it may be difficult to obtain financing given the Company’s current condition and uncertainty over its future direction. Therefore, we may be unable to raise capital when needed or on favorable terms. Our failure to raise capital or enter into such other arrangements as and when needed would have a negative impact on our financial condition and our ability to continue operations.

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Recent Developments

Restructuring

On September 26, 2022, we announced our commitment to a plan to wind down our existing preclinical programs, including the development of our SCN9A program, to suspend all of our research and development (“R&D”) activities, including suspension of all partnered programs, and to implement a reduction in force whereby we reduced approximately 66% of our then-existing workforce, as well as other cost-cutting measures (collectively, the “Plan”). The purpose of the Plan was to decrease expenses, thereby, extending our cash runway, and enable us to maintain a streamlined organization to support key corporate functions.

Change of Control

On February 24, 2023, following the satisfaction of closing conditions, including the approval by our stockholders at a Special Meeting of Stockholders held on December 15, 2022, we closed our private placement (the “Private Placement”) to CBI USA. Exicure received gross proceeds of approximately $5.4 million in connection with the close of the Private Placement (or net proceeds of approximately $4.6 million after transaction expenses) and expects to use the net proceeds for general working capital purposes as we pursue strategic alternatives as well as for the payout for warrant put rights that were exercised as a result of the change of control.

Following the closing of the Private Placement, CBI USA is the beneficial owner of approximately 50.4% of the Company’s outstanding shares, resulting in a “change of control” of Exicure under the applicable Nasdaq rules. At closing, CBI USA designated three members to the Company’s board of directors. We are currently relying on Nasdaq’s “controlled company” exception to the requirements that a majority of our board be independent and that we have an independent compensation committee and independent nominating committee or function.

Nasdaq Listing Requirements Deficiency Notice

As previously disclosed, the Company has received numerous deficiency notices with respect to various Nasdaq listing requirements in the past year. These related to:

•Compliance with Nasdaq’s minimum bid price rule due to the Company’s stock trading below $1.00 for a sustained period of time. The Company effected a one-for-thirty reverse stock split on June 29, 2022 in order to attempt to raise the stock price. As of July 10, 2023, the Company’s stock price closed at $1.13.

•Compliance with Nasdaq’s rule requiring stockholders’ equity of at least $2,500,000 based on the Company’s balance sheet as of June 30, 2022. The Company believes it is in compliance with this requirement based on its March 31, 2023 balance sheet, but there can be no assurance it will remain in compliance.

•Compliance with Nasdaq’s corporate governance requirements with respect to board and committee composition due to the lack of (i) a majority independent board, (ii) an audit committee comprised of three independent directors and (iii) a compensation committee comprised of at least two independent directors. With respect to the majority independence and the audit committee requirements, Nasdaq informed the Company that it was not entitled to a cure period and must submit a plan to regain compliance no later than April 10, 2023. Following the closing of the Private Placement, the Company qualifies for Nasdaq’s controlled company exemptions from the requirements to have a majority independent board and independent compensation committee. The Company must still have an audit committee comprised of three independent directors. On May 10, 2023, the Company received an additional delinquency notification regarding compliance with the listing requirements for an audit committee to be comprised of at least three independent directors. The Company is searching for a qualified candidate to add as an independent director.

•On May 17 2023, the Company received a delinquency notification as it had not filed its first quarter Form 10-Q at the deadline. This delinquency will be cured shortly after this filing.

35

Even if the Company regains compliance with Nasdaq’s listing requirements and addresses the outstanding deficiency notices to Nasdaq’s satisfaction, there can be no assurance that the Company will remain in compliance with Nasdaq’s requirements and will not be delisted.

Critical Accounting Estimates

We prepare our condensed consolidated financial statements in accordance with accounting principles principles generally accepted in the United States of America, which require our management to make estimates that affect the reported amounts of assets, liabilities and disclosures of contingent assets and liabilities at the balance sheet dates, as well as the reported amounts of revenues and expenses during the reporting periods. To the extent that there are material differences between these estimates and actual results, our financial condition or results of operations would be affected. We base our estimates on our own historical experience and other assumptions that we believe are reasonable after taking account of our circumstances and expectations for the future based on available information. We evaluate these estimates on an ongoing basis.

We consider an accounting estimate to be critical if: (i) the accounting estimate requires us to make assumptions about matters that were highly uncertain at the time the accounting estimate was made, and (ii) changes in the estimate that are reasonably likely to occur from period to period or use of different estimates that we reasonably could have used in the current period, would have a material impact on our financial condition or results of operations. There are items within our condensed consolidated financial statements that require estimation but are not deemed critical, as defined above.

Recently adopted accounting pronouncements

Refer to Note 2, Significant Accounting Policies, of the accompanying unaudited condensed consolidated financial statements for a description of recent accounting pronouncements ASU 2016-13 adopted during the first quarter of 2023.

Recent accounting pronouncements not yet adopted

Refer to Note 2, Significant Accounting Policies, of the accompanying unaudited condensed consolidated financial statements for a description of recent accounting pronouncements not yet adopted.

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Results of Operations

Comparison of the Three Months Ended March 31, 2023 and 2022

The following table summarizes the results of our operations for the three months ended March 31, 2023 and 2022:

	Three Months Ended March 31,
(dollars in thousands)	2023 (Restated)		2022		Change
Revenue:
Collaboration revenue	$	—	$	2,565	$	(2,565)	(100)	%
Total revenue	—		2,565		(2,565)		(100)	%
Operating expenses:
Research and development expense	1,423		7,140		(5,717)		(80)	%
General and administrative expense	3,116		3,162		(46)		(1)	%
Total operating expenses	4,539		10,302		(5,763)		(56)	%
Operating loss	(4,539)		(7,737)		3,198		(41)	%
Other income (expense), net:
Dividend income	17		2		15		750	%
Interest income	11		2		9		450	%
Interest expense	—		(595)		595		(100)	%
Other expense, net	104		(20)		124		(620)	%
Total other income (expense), net	132		(611)		743		(122)	%
Net loss before provision for income taxes	(4,407)		(8,348)		3,941		(47)	%
Provision for income taxes	—		—		—		—	%
Net loss	$	(4,407)	$	(8,348)	$	3,941	(47)	%

Revenue

The following table summarizes our revenue earned during the periods indicated:

	Three Months Ended March 31,
(dollars in thousands)	2023		2022		Change
Collaboration revenue:
Ipsen Collaboration Agreement	$	—	$	2,080	$	(2,080)	(100)	%
AbbVie Collaboration Agreement	—		485		(485)		(100)	%
Total collaboration revenue	$	—	$	2,565	$	(2,565)	(100)	%
Total revenue	$	—	$	2,565	$	(2,565)	(100)	%

Collaboration revenue was $0.0 million during the three months ended March 31, 2023, reflecting a decrease of $2.6 million, or (100)%, from collaboration revenue of $2.6 million for the three months ended March 31, 2022. The decrease in collaboration revenue of $2.6 million is due the termination of the Ipsen and AbbVie Collaboration Agreements in December 2022 that resulted in recognition of the remaining deferred revenue associated with each of those collaboration agreements in the fourth quarter of 2022.

37

Research and development expense

The following table summarizes our research and development expenses incurred during the periods indicated:

	Three Months Ended March 31,
(dollars in thousands)	2023 (Restated)		2022		Change
Employee-related expense	$	511	$	2,303	$	(1,792)	(78)	%
Platform and discovery-related expense	93		2,145		(2,052)		(96)	%
Facilities, depreciation, and other expenses	755		1,066		(311)		(29)	%
Clinical development programs expense	64		1,626		(1,562)		(96)	%
Total research and development expense	$	1,423	$	7,140	$	(5,717)	(80)	%
Full time employees	1		33		(32)

Research and development expense was $1.4 million for the three months ended March 31, 2023, reflecting a decrease of $5.7 million, or 80%, from research and development expense of $7.1 million for three months ended March 31, 2022. The decrease in research and development expense for the three months ended March 31, 2023 of $5.7 million reflects the suspension of clinical, preclinical, and discovery program activities and the reduction in headcount resulting from the restructuring activities that were announced in December 2021 and September 2022. More specifically, the decrease in research and development expense for the three months ended March 31, 2023 of $5.7 million was primarily due to a decrease in costs related to our lower platform and discovery-related expense of $2.1 million, clinical development programs of $1.6 million, and lower employee-related expense of $1.8 million.

The decrease in platform and discovery-related expense for the three months ended March 31, 2023 of $2.1 million was mostly due to lower CRO and materials costs, all in connection with suspension of R&D activities in connection with reduction in headcount and fewer R&D activities.

The decrease in clinical development programs expense for the three months ended March 31, 2023 of $1.6 million was primarily due to lower manufacturing and toxicology study costs in connection with IND-enabling and Phase 1 clinical trial preparation activities for the XCUR-FXN program, which was indefinitely suspended in December 2021, contributed to the decrease in clinical development program expense as compared to the prior-year period.

The decrease in employee-related expense for the three months ended March 31, 2023 of $1.8 million was due to lower compensation and related costs in connection with a lower average headcount during the period resulting from the restructuring activities that were announced in September 2022 and December 2021.

General and administrative expense

	Three Months Ended March 31,
(dollars in thousands)	2023		2022		Change
General and administrative expense	$	3,116	$	3,162	(46)	(1)	%
Full time employees	8		7		1

General and administrative expense was $3.1 million for the three months ended March 31, 2023, representing a decrease of $0.0 million, or 1%, from $3.2 million for the three months ended March 31, 2022. The decrease for the three months ended March 31, 2023 was mostly due to lower retention award and bonus compensation, based on current estimates, as well as lower legal fees and insurance. These decreases were partially offset by less operating costs allocated out to R&D based on changes in headcount.

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Interest expense

The decrease in interest expense of $0.6 million for the three months ended March 31, 2023 is in connection with the repayment in full of all outstanding indebtedness and other obligations under the MidCap Credit Agreement (as defined below) on March 15, 2022.

Liquidity and Capital Resources

Since our inception, we have incurred significant operating losses as an early-stage biotechnological company. We have generated limited revenue to date from our collaboration agreements, which have since been terminated. We have not commercialized any of our product candidates, and we do not expect to generate revenue from sales of any product. We have funded our operations to date with proceeds received from equity financings and payments received in connection with collaboration agreements, which have since been terminated. Currently we are exploring strategic alternatives and generating little to no revenue.

As of March 31, 2023, our cash, cash equivalents, and restricted cash were $11.2 million as compared to $9.8 million as of December 31, 2022. To date, we have funded our operations primarily with proceeds received from equity financings and to a lesser extent, payments received in connection with collaboration agreements. We have generated limited revenue to date from our collaboration agreements.

We incurred net losses of approximately $4.4 million and $8.3 million for the three months ended March 31, 2023 and 2022, respectively. As of March 31, 2023, we have generated an accumulated deficit of $195.9 million since inception and expect to incur significant expenses and negative cash flows for the foreseeable future.

Based on our current operating plans and existing working capital at March 31, 2023, it is uncertain whether our current liquidity is sufficient to fund operations over the next twelve months from the date of the issuance of the accompanying unaudited condensed consolidated financial statements. As a result, there is substantial doubt about our ability to continue as a going concern. Substantial additional financing will be needed to fund our operations and there is no certainty we will obtain such financing. If we are unable to raise capital, we will need to consider other various strategic alternatives, including a merger or sale, or be unable to continue operations. We may need to seek bankruptcy protection in the near term, which may result in our stockholders receiving no or very little value in respect of their shares of our common stock.

See “Funding Requirements” below for additional information on our future capital needs.

MidCap Facility

On March 15, 2022, we repaid in full all outstanding indebtedness and other obligations under our Credit and Security Agreement, dated as of September 25, 2020, as amended on October 21, 2020, July 30, 2021, September 30, 2021, and December 10, 2021, with MidCap Financial Trust, as agent, and the lenders party thereto from time to time, or the MidCap Credit Agreement, and the other Financing Documents (as defined in the MidCap Credit Agreement), including but not limited to the outstanding principal balance of $7.5 million and an exit fee of approximately $0.5 million, and terminated all obligations thereunder (other than with respect to any obligations that are expressly specified to survive the termination).

Private Placements

In September 2022, we entered into the Securities Purchase Agreement with CBI USA, pursuant to which we agreed to issue and sell to CBI USA in a private placement an aggregate of 3,400,000 shares of our common stock, par value $0.0001 per share, at a purchase price of $1.60 per share. This Private Placement closed on February 24, 2023. Immediately following the closing of the Private Placement, CBI USA held approximately 50.4% of the shares of our common stock.

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In May 2022, we entered into a securities purchase agreement with several accredited investors, pursuant to which we issued and sold 867,369 shares of common stock, par value $0.0001 per share, at a purchase price of $5.81 per share for net proceeds of approximately $4.9 million.

Cash Flows

The following table shows a summary of our cash flows for the three months ended March 31, 2023 and 2022:

	Three Months Ended March 31,
(in thousands)	2023		2022
	(unaudited)
Net cash used in operating activities	$	(3,318)	$	(12,756)
Net cash provided by investing activities	106		1,995
Net cash provided by (used in) financing activities	4,595		(7,993)
Net increase (decrease) in cash, cash equivalents, and restricted cash	$	1,383	$	(18,754)

Operating activities

Net cash used in operating activities was $3.3 million and $12.8 million for the three months ended March 31, 2023 and 2022, respectively. The decrease in cash used in operating activities for the three months ended March 31, 2023 of $9.4 million was primarily due to the suspension of R&D activities and lower headcount from the September 2022 restructuring.

Investing activities

Net cash provided by investing activities was $0.1 million and $2.0 million for the three months ended March 31, 2023 and 2022, respectively. The decrease in cash provided by investing activities of $1.9 million was primarily due to a decrease in proceeds from the maturity, net of purchases, of available-for-sale securities.

Financing activities

Net cash provided in financing activities of $4.6 million for three months ended March 31, 2023 is due to the Private Placement closed in February.

Net cash used by financing activities of $8.0 million for the three months ended March 31, 2022 was primarily due to the repayment in full of all outstanding indebtedness and other obligations under the MidCap Credit Agreement, partially offset by net proceeds of approximately $4.9 million received in connection with the May 2022 private placement transaction.

Funding Requirements

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 acceptable terms, we would be forced to consider other various strategic alternatives, including a merger or sale; or cease operations.

We believe that our existing cash and cash equivalents will enable us to fund our operating expenses and capital expenditure requirements into the fourth quarter of 2023. However, we have based this estimate on assumptions that may prove to be wrong, and we may use our available capital resources sooner than we currently expect. Our future capital requirements are difficult to forecast and will depend on many factors, including:

•the results of our exploration of strategic alternatives, including any potential transactions or collaborations;

•the results of any future or pending litigation against the Company;

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•the extent to which we encounter increased costs as a result of global and macroeconomic conditions, including rising inflation and interest rates, supply chain disruptions, fluctuating exchange rates, and increases in commodity, energy and fuel prices; and

•unknown legal, administrative, regulatory, accounting, and information technology costs as well as additional costs associated with operating as a public company.

Until such time, if ever, as we can generate substantial revenue, we expect to finance our cash needs through a combination of equity offerings and distribution or licensing arrangements with third parties. To the extent that we raise additional capital through the sale of equity or convertible debt securities, the ownership interest of our stockholders may be materially diluted, and the terms of such securities could include liquidation or other preferences that adversely affect the rights of our 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. Further, the global financial markets have experienced significant disruptions over the past couple of years due to the COVID-19 pandemic, the ongoing conflict between Russia and Ukraine, and worsening global macroeconomic conditions, including actions taken by central banks to counter inflation, volatility in the capital markets and related market uncertainty, may impact our ability to obtain additional financing when needed on favorable terms or at all. Any further disruption or slowdown in the global financial markets and economy may negatively affect our ability to raise funding through equity or debt financings on attractive terms or at all, which could in the future negatively affect our operations.

Going Concern

In accordance with Accounting Standards Codification 205-40, Going Concern, we have evaluated whether there are conditions and events, considered in the aggregate, that raise substantial doubt about our ability to continue as a going concern within one year after the date that the unaudited condensed consolidated financial statements are issued. In the absence of a significant source of recurring revenue, our continued viability is dependent on our ability to continue to raise additional capital to finance our operations. As discussed above, there are substantial uncertainties about our ability to raise such financing.

Contractual Obligations and Commitments

There have been no material changes to our contractual obligations and commitments from those described in our Annual Report.

JOBS Act

We are an emerging growth company, as defined in the Jumpstart Our Business Startups Act of 2012, or the JOBS Act. Under the JOBS Act, an emerging growth company can take advantage of an extended transition period for complying with new or revised accounting standards. Thus, an emerging growth company can delay the adoption of certain accounting standards until those standards would otherwise apply to private companies. We have irrevocably elected not to avail ourselves of this extended transition period and, as a result, we will adopt new or revised accounting standards on the relevant dates on which adoption of such standards is required for other public companies.

In addition, as an emerging growth company, we will not be required to provide an auditor’s attestation report on our internal control over financial reporting in future annual reports on Form 10-K as otherwise required by Section 404(b) of the Sarbanes-Oxley Act.

Item 3. Quantitative and Qualitative Disclosures about Market Risk.

As a smaller reporting company, as defined by Rule 12b-2 of the Exchange Act and in Item 10(f)(1) of Regulation S-K, we are electing scaled disclosure reporting obligations and therefore are not required to provide the information requested by this Item.

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Item 4. Controls and Procedures.

Limitations on Effectiveness of Controls and Procedures

In designing and evaluating our disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives. In addition, the design of disclosure controls and procedures must reflect the fact that there are resource constraints and that management is required to apply judgment in evaluating the benefits of possible controls and procedures relative to their costs.

Evaluation of Disclosure Controls and Procedures

We maintain “disclosure controls and procedures” as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, that are designed to ensure that information required to be disclosed in our periodic and current reports that we file with the SEC under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure. Management recognizes that any 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.

Our management, with the participation of our principal executive officer and our principal financial officer, evaluated the effectiveness of our disclosure controls and procedures as of March 31, 2023. Based on the evaluation of our disclosure controls and procedures as of March 31, 2023, our principal executive officer and principal financial officer concluded that, as of such date, our disclosure controls and procedures were not effective at the reasonable assurance level due to the material weakness described below.

Material Weakness in Internal Control over Financial Reporting

A material weakness is a deficiency, or combination of deficiencies, in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of the annual or interim financial statements will not be prevented or detected on a timely basis.

Subsequent to the filing of the Original Report, in connection with the restatement, management identified a material weakness in the Company’s internal control over financial reporting related to the precision of management’s review of the statement of operations, resulting in inappropriately classifying certain general and administrative expenses as research and development expenses.

This matter has been reviewed with our Audit Committee and the material weakness resulted in the restatement described in Note 1 to the unaudited interim condensed consolidated financial statements as of and for the three months ended March 31, 2023 included in this Form 10-Q/A.

Remediation Plan

We are evaluating the material weakness and are developing a plan of remediation to strengthen the effectiveness of the design and operation of our internal control environment. The remediation plan will include enhancing our review procedures within our accounting department, implementing additional review procedures with respect to accumulation and evaluation of information that is known or knowable to the Company at the time, and applying that information to the applicable accounting guidance. Subject to our ability to obtain additional financing and the results of our review of strategic alternatives, we will also consider whether additional personnel are necessary.

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Changes in Internal Control over Financial Reporting

Other than described above, there were no changes in our internal control over financial reporting during the fiscal quarter ended March 31, 2023 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II – OTHER INFORMATION

Item 1. Legal Proceedings.

On December 13, 2021, Mark Colwell filed a putative securities class action lawsuit against the Company, David A. Giljohann and Brian C. Bock in the United States District Court for the Northern District of Illinois, captioned Colwell v. Exicure, Inc. et al., Case No. 1:21-cv-0663. On February 4, 2021, plaintiff filed an amended putative securities class action complaint. On March 20, 2023, the court entered an order appointing James Mathew as lead plaintiff and Bleichmar Fonti & Auld LLP as lead counsel in the action pursuant to the Private Securities Litigation Reform Act of 1995. On May 26, 2023, lead plaintiff filed a second amended complaint against the Company, Dr. Giljohann, Mr. Bock, and Grant Corbett. The second amended complaint alleges that Dr. Giljohann, Mr. Bock, and Dr. Corbett made materially false and/or misleading statements related to the Company’s clinical programs purportedly causing losses to investors who acquired Company securities between January 7, 2021 and December 10, 2021. The second amended complaint does not quantify any alleged damages but, in addition to attorneys’ fees and costs, lead plaintiff seeks to recover damages on behalf of himself and others who acquired the Company’s stock during the putative class period at allegedly inflated prices and purportedly suffered financial harm as a result. The Company intends to move to dismiss the complaint.

On March 1, 2022, Kapil Puri filed a shareholder derivative lawsuit on behalf of the Company in the United States District Court for the Northern District of Illinois, against Messrs. Giljohann and Bock, Jeffrey L. Cleland, Elizabeth Garofalo, Bosun Hau, Bali Muralidhar, Andrew Sassine, Matthias Schroff, James Sulat and Timothy Walbert, captioned Puri v. Giljohann, et al., Case No. 1:22-cv-01083. On March 8, 2022, Yixin Sim filed a similar shareholder derivative lawsuit in the same court against the same individuals, captioned Sim v. Giljohann, et al., Case No. 1:22-cv-01217. On April 25, 2022, Stourbridge Investments LLC filed a similar shareholder derivative lawsuit against the same individuals in the United States District Court for the District of Delaware, captioned Stourbridge Investments LLC v. Exicure, Inc. et al., Case No. 1:22-cv-00526. Based on similar factual allegations presented in the Colwell complaint, described above, the Puri, Sim, and Stourbridge complaints, or collectively, the Derivative Complaints, allege that the defendants caused the Company to issue false and/or misleading statements in its 2021 proxy statement regarding risk oversight, code of conduct, clinical program and compensation matters, among other things, in violation of federal securities law, and committed breaches of fiduciary duties. The Derivative Complaints also assert that Dr. Giljohann and Mr. Bock are liable for contribution under the federal securities laws. The Puri and Stourbridge complaints further assert state law claims for unjust enrichment, and the Puri complaint additionally asserts state law claims for abuse of control, gross mismanagement and corporate waste. The plaintiffs do not quantify any alleged damages in the Derivative Complaints, but seek restitution for damages to the Company, attorneys’ fees, costs, and expenses, as well as an order directing that certain proposals for strengthening board oversight be put to a vote of the Company’s shareholders.

On March 18, 2022, James McNabb, through counsel, sent a written demand to the Company (the “Demand Letter”) demanding that the Board of Directors investigate certain allegations and commence proceedings on the Company’s behalf against certain of the Company’s current officers and directors for alleged breaches of fiduciary duties and corporate waste. All of the Derivative Cases have been stayed pending a decision on any motion to dismiss that may be filed in the Puri case. In addition, the Stourbridge case has been administratively closed pending the decision on motion to dismiss that may be filed in the Puri case. Further, pursuant to agreement, the Demand Letter is being held in abeyance and any related statute of limitations tolled pending such motion and decision.

In June 2023, a director of the Company designated by CBI USA served a demand on the Company to access certain books and records pursuant to Section 220(d) of the Delaware General Corporation Law. The Company served its response and is working with the director to resolve this demand amicably and in accordance with the Company’s obligations under Delaware law.

We may also be a party to litigation and subject to claims incident to the ordinary course of business. Although the results of litigation and claims cannot be predicted with certainty, we currently believe that the final outcome of these ordinary course matters will not have a material adverse effect on our business. Regardless of the outcome, litigation can have an adverse impact on us because of defense and settlement costs, diversion of management resources and other factors.

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Item 1A. Risk Factors.

In addition to other information contained in this Quarterly Report on Form 10-Q, the following risks should be considered in evaluating our business and future prospects and an investment in our common stock. The risks and uncertainties described below are not the only ones we face. If any of the following risks and uncertainties develops into actual events, our business, financial condition, results of operations and cash flows could be materially adversely affected. In that case, the price of our common stock could decline and you may lose all or part of your investment.

Risks Related to Our Business

Our exploration of strategic alternatives may not be successful.

Given the Company’s current focus to explore growth through strategic transactions with potential partners, the Company’s ability to execute its current business plan depends on its ability to obtain additional funding via a strategic transaction or a series of strategic transactions, or to obtain funding to support such a transaction. We currently have no source of revenues or committed financing, and our financial resources are limited to our cash and cash equivalents. With respect to our efforts to maximize value from historical assets, while those efforts are continuing, based on the interest we have received to date we do not think it is likely they will generate significant value, at least in the near term.

The Company plans to continue actively pursuing strategic alternatives, however, there can be no assurance that the Company will have sufficient resources or obtain additional financing necessary to complete this effort. Even if we do have such resources or can obtain financing, we may not be able to consummate such a transaction in a timely manner or at all or in a manner that would not adversely impact our business. The accompanying financial statements do not include any adjustments that might result from the outcome of this uncertainty. Strategic transactions are complex and time-consuming to identify, evaluate, negotiate and consummate in compliance with applicable laws and Nasdaq requirements. Our board and management do not have meaningful experience executing this type of endeavor in the U.S. public markets. Even if we are successful in entering into a strategic transaction, the terms and conditions of that transaction may restrict us from entering into future agreements with other potential collaborators. Additionally, such strategic transactions may not be favorable to investors nor deliver any anticipated benefits by the time of business integration.

We need to obtain substantial funding in the near term in order to continue operations and our exploration of strategic alternatives.

We require significant capital resources in order to continue to operate our business and conduct our exploration of strategic alternatives, and our limited liquidity could materially and adversely affect our business operations. Because we have no current source of revenue or committed financing, our current available cash and cash equivalents provide us with limited liquidity. We believe that our existing cash and cash equivalents could allow us to fund our business operations into early in the fourth quarter of 2023; however, it is very difficult to project our current monthly cash burn rate given the transitional status of the Company and this estimate may prove inaccurate and we may expend our limited resources sooner. Any such required additional capital may not be available on reasonable terms, if at all, due to a variety of factors, including uncertainty about the future direction of the Company and investor reaction to our new controlling stockholder and board composition, as well as broader conditions in the economy and capital markets, including recent volatility caused by inflation, questions about bank stability and other factors. The Company has already engaged in significant cost reductions, so our ability to further cut costs and extend our operating runway is limited. Without sufficient additional capital funding in the near term, we may be required, among other things, to seek bankruptcy protection.

Our controlling stockholder, executive officers and members of our board, have limited experience controlling or governing a public company operating in the United States.

Our controlling stockholder has not previously controlled a U.S. public company. In addition, the majority of our board is made of up Korean citizens, and no members of the board or our chief executive officer or chief financial officer have experience serving as directors or management of a U.S. publicly traded company. This could make it difficult to ensure that the Company complies with all applicable laws and stock exchange requirements, maintains adequate internal and disclosure controls and appropriately assesses and manages risk. This concern is exacerbated by the limited resources the Company has following recent reductions in force, and if there are further reductions in force or members of management leave the Company, it may be very difficult to manage this risk. The transitional state of the Company and ongoing exploration of strategic alternatives also exacerbates the challenging environment in this respect. If the board of directors does not successfully or efficiently manage their roles and responsibilities, including the significant regulatory oversight and reporting obligations under the federal securities laws and the continuous scrutiny of investors, our prospects may be adversely impacted. In addition, against this backdrop, it may be difficult to earn the confidence of

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prospective investors or strategic partners, threatening our ability to obtain much needed financing and hindering our exploration of strategic alternatives.

Turnover of senior management, and any inability to attract and retain qualified management and other key personnel, could impair our ability to implement our business plan.

As we continue our exploration of strategic alternatives, and potentially pursue transactions involving new business lines or industries, we expect significant turnover in senior management. Departures of members of our senior management team and board members, will create significant continuity risks and challenges to our ability to operate our business, assess and manage risks and comply with applicable laws. If key members of our senior management team depart, which we believe is likely in the near term, it will be important that we attract and retain qualified managers promptly and develop and implement an effective succession plan. We expect to face significant competition in attracting experienced executives and other key personnel, and there can be no assurance that we will be able to do so. In addition, there are significant uncertainties as to how our controlled company status, transitional state of operations, financial condition and related matters will impact our ability to attract the necessary personnel and manage these succession risks. Depending on the circumstances of any management departures, it is also possible that we will be required to pay significant severance, adversely impacting our financial condition. Our urgent need to raise capital and engage with potential partners in strategic transactions magnify these risks. If we are unable to adequately address these concerns in the near term, and earn the confidence of potential investors and/or business partners, our prospects and financial condition would be adversely impacted.

Our consolidated financial statements have been prepared assuming that we will continue as a going concern.

Our ability to continue as a going concern will require us to obtain additional funding. Based on our current operating plans and existing working capital at March 31, 2023, our current liquidity is not sufficient to fund operations over the next twelve months from the date of the issuance of the accompanying consolidated financial statements. As a result, there is substantial doubt about our ability to continue as a going concern. Substantial additional financing will be needed by us to fund our operations and exploration of strategic alternatives in the near term. Although we currently estimate that available funds could be sufficient into early in the fourth quarter of 2023, we have based these estimates on assumptions that may prove to be wrong, and we could spend our available financial resources much faster than we currently expect. It is very difficult to project our current monthly cash burn rate given the transitional status of the Company as we explore strategic alternatives. The perception of our ability to continue as a going concern may make it more difficult for us to obtain financing for the continuation of our operations and could result in the loss of confidence by investors and employees. Obtaining additional financing contains risks, including:

•additional equity financing may not be available to us on satisfactory terms and any equity we are able to issue could lead to dilution for current stockholders;

•loans or other debt instruments may have terms and/or conditions, such as interest rate, restrictive covenants and control or revocation provisions;

•the current environment in capital markets combined with our capital constraints may prevent us from being able to obtain adequate debt financing; and

•if we fail to obtain required additional financing to grow our business we may need to seek bankruptcy protection in the near term.

Our common stock may be delisted from Nasdaq which could negatively impact the price of our common stock, liquidity and our ability to access the capital markets.

Our common stock is currently listed on Nasdaq under the symbol “XCUR.” As previously disclosed, the Company has received numerous deficiency notes with respect to various Nasdaq listing requirements in the past year. These related to:

•Compliance with Nasdaq’s minimum bid price rule due to the Company’s stock trading below $1.00 for a sustained period of time. The Company effected a one-for-thirty reverse stock split on June 29, 2022 in order to attempt to raise the stock price. As of July 10, 2023, the Company’s stock price closed at $1.13.

•Compliance with Nasdaq’s rule requiring stockholders’ equity of at least $2,500,000 based on the Company’s balance sheet as of June 30, 2022. The Company believes it is in compliance with this requirement based on its March 31, 2023 balance sheet, but there can be no assurance it will remain in compliance.

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•Compliance with Nasdaq’s corporate governance requirements with respect to board and committee composition due to (i) the lack of a majority independent board, (ii) the lack of an audit committee comprised of three independent directors and (iii) the lack of a compensation committee comprised of at least two independent directors. With respect to the majority independence and the audit committee requirements, Nasdaq informed the Company that it was not entitled to a cure period and must submit a plan to regain compliance no later than April 10, 2023. Following the closing of the Private Placement, the Company qualifies for Nasdaq’s controlled company exemptions from the requirements to have a majority independent board and independent compensation committee. The Company must still have an audit committee comprised of three independent directors. On May 10, 2023 the Company received an additional delinquency notification regarding compliance with the listing requirements for an audit committee to be comprised of at least three independent directors. The Company is searching for a qualified candidate to add as an independent director.

Even if the Company regains compliance with Nasdaq’s listing requirements and addresses the outstanding deficiency notices to Nasdaq’s satisfaction, there can be no assurance that the Company will remain in compliance with Nasdaq’s requirements and will not be delisted.

If Nasdaq delists our securities from trading on its exchange for failure to meet the listing standards, we and our stockholders could face significant negative consequences including:

•limited availability of market quotations and liquidity for our securities;

•a determination that the common stock is a “penny stock” which would require brokers trading in the common stock to adhere to more stringent rules, possibly resulting in a reduced level of trading activity in the secondary trading market for shares of common stock;

•a limited amount of analyst coverage, if any; and

•a decreased ability to issue additional securities or obtain additional financing in the future.

Delisting from Nasdaq could also result in other negative consequences, including the potential loss of institutional investor interest and make obtaining new financing much more challenging. In addition, fewer strategic opportunities may be available, particularly from counterparties that are interested in combining with a listed company.

We have a history of losses. We expect to continue to incur significant losses for the foreseeable future and may never achieve or maintain profitability, which could result in a decline in the market value of our common stock.

Between our inception in June 2011 and the Company’s decision to engage in a broader exploration of strategic alternatives, we devoted our resources to the development of SNA technology, and are currently exploring out-licensing opportunities and strategic alternatives to maximize stockholder value. We have had significant operating losses since our inception. As of March 31, 2023, we have generated an accumulated deficit of $195.9 million. For the three months ended March 31, 2023 and 2022, our net loss was $4.4 million and $8.3 million, respectively. Substantially all of our losses have resulted from expenses incurred in connection with our research programs and from general and administrative costs associated with our operations.

We have not generated, and do not expect to generate, any product revenue for the foreseeable future and currently have no source of revenue or committed financing, and we expect to continue to incur significant operating losses for the foreseeable future. The amount of future losses is uncertain. Our future financial performance and condition are substantially dependent on the results of our ongoing exploration of strategic alternatives, and we cannot predict whether we will be successful.

We are pursuing asset out-licenses, asset sales and similar strategic transactions with respect to our historical assets. There can be no assurance that we will be successful in executing such a strategic transaction.

These strategic alternatives may include a variety of different business arrangements, such as the sale of certain of our assets, out-licensing, strategic partnerships, joint ventures, restructurings, divestitures, investments and other alternatives. We may not be able to identify or consummate a suitable transaction as a result of this review, or any transactions that we are able to identify and consummate may not provide material benefits to our stockholders. Based on the interest in these assets that we have seen to date, we do not currently expect any such transaction to provide significant value, at least in the near term.

Our internal computer systems, or those of contractors or consultants, may fail or suffer security breaches, which could result in a material disruption of our business operations.

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Despite the implementation of security measures, our internal computer systems and those of our contractors and consultants are vulnerable to damage from computer viruses, unauthorized access, natural disasters, terrorism, war and telecommunication and electrical failures. Such events could cause interruptions of our operations. For instance, theft or other exposure of data may interfere with our ability to protect our intellectual property, trade secrets, and other information critical to our operations. We can provide no assurances that certain sensitive and proprietary information relating to one or more of our therapeutic candidates has not been, or will not in the future e, compromised. Although we have invested resources to enhance the security of our computer systems, there can be no assurances we will not experience additional unauthorized intrusions into our computer systems, or those of our contractors and consultants, that we will successfully detect future unauthorized intrusions in a timely manner, or that future unauthorized intrusions will not result in material adverse effects on our financial condition, reputation, or business prospects. Payments related to the elimination of ransomware may materially affect our financial condition and results of operations.

To the extent that any disruption or security breach were to result in a loss of, or damage to, our data, or inappropriate disclosure of confidential or proprietary information, we could incur liability and the development of our therapeutic candidates could be delayed.

Our information technology systems could face serious disruptions that could adversely affect our business.

Our information technology and other internal infrastructure systems, including corporate firewalls, servers, documents storage systems, backup systems, leased lines and connection to the Internet, face the risk of systemic failure that could disrupt our operations. A significant disruption in the availability of our information technology and other internal infrastructure systems could cause interruptions and delays in our operations.

Our business and operations could suffer in the event of system failures or unauthorized or inappropriate use of or access to our information technology systems.

We are increasingly dependent on our information technology systems and infrastructure for our business. We collect, store and transmit sensitive information including intellectual property, proprietary business information and personal information in connection with business operations. The secure maintenance of this information is critical to our operations and business strategy. Some of this information could be an attractive target of criminal attack or unauthorized access and use by third parties with a wide range of motives and expertise, including organized criminal groups, “hacktivists,” patient groups, disgruntled current or former employees and others. Cyber-attacks are of ever-increasing levels of sophistication, and despite our security measures, our information technology systems and infrastructure may be vulnerable to such attacks or may be breached, including due to employee error or malfeasance.

The pervasiveness of cybersecurity incidents in general and the risks of cyber-crime are complex and continue to evolve. Although we are making significant efforts to maintain the security and integrity of our information systems and are exploring various measures to manage the risk of a security breach or disruption, there can be no assurance that our security efforts and measures will be effective or that attempted security breaches or disruptions would not be successful or damaging. Despite the implementation of security measures, our internal computer systems and those of our employees, contractors and consultants are vulnerable to damage or interruption from computer viruses, unauthorized or inappropriate access or use, natural disasters, pandemics (including COVID-19), terrorism, war, and telecommunication and electrical failures. Such events could cause interruption of our operations. For example, the loss or compromise of preclinical data for our therapeutic candidates could result in delays in our regulatory filings and development efforts, as well as delays in the commercialization of our products, and significantly increase our costs. To the extent that any disruption, security breach or unauthorized or inappropriate use or access to our systems were to result in a loss of or damage to our data, or inappropriate disclosure of confidential or proprietary information, including but not limited to patient, employee or vendor information, we could incur notification obligations to affected individuals and government agencies, liability, including potential lawsuits from patients, collaborators, employees, stockholders or other third parties and liability under foreign, federal and state laws that protect the privacy and security of personal information, and the development and potential commercialization of our therapeutic candidates could be delayed. Existing insurance arrangements may not provide protection for the costs that may arise from such loss or damage. Any long-term disruption in our ability to access our information technology systems could have a material adverse effect on our operations, our business, results of operations and stock price.

Increasing scrutiny and changing expectations from customers, regulators, investors, and other stakeholders with respect to our environmental, social and governance practices may impose additional costs on us or expose us to new or additional risks.

Companies are facing increasing scrutiny from customers, regulators, investors, and other stakeholders related to their environmental, social and governance practices. Investor advocacy groups, investment funds and influential investors are

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also increasingly focused on these practices, especially as they relate to the environment, health and safety, supply chain management, diversity and human rights. Failure to adapt to or comply with regulatory requirements or investor or stakeholder expectations and standards could negatively impact our reputation and the price of our ordinary shares.

Any of the factors mentioned above, or the perception that we or our suppliers, or contract manufacturers or collaborators have not responded appropriately to the growing concern for such issues, regardless of whether we are legally required to do so, may damage our reputation and have a material adverse effect on our business, financial condition, results of operations cash flows and/or ordinary share price.

Our current operations are concentrated in one location and any events affecting this location may have material adverse consequences.

Our current operations are located in our facilities situated in Chicago, Illinois. Any unplanned event, such as flood, fire, explosion, earthquake, extreme weather condition, medical epidemics, power shortage, telecommunication failure or other natural or man-made accidents or incidents that result in us being unable to fully utilize the facilities, may have a material adverse effect on our ability to operate our business, particularly on a daily basis, and have significant negative consequences on our financial and operating conditions. Loss of access to these facilities may result in increased costs, or interruption of our business operations. As part of our risk management policy, we maintain insurance coverage at levels that we believe are appropriate for our business. However, in the event of an accident or incident at these facilities, we cannot assure you that the amounts of insurance will be sufficient to satisfy any damages and losses. If our facilities are unable to operate because of an accident or incident or for any other reason, even for a short period of time, any or all of our research and development programs may be harmed. Any business interruption may have a material adverse effect on our business, financial position, results of operations and prospects.

The investment of our cash, cash equivalents and fixed income marketable securities is subject to risks which may cause losses and affect the liquidity of these investments.

As of March 31, 2023, we had $11.2 million in cash, cash equivalents, and restricted cash. We invest our excess cash in U.S. government or U.S. government agency securities, floating rate and variable rate demand notes of U.S. and foreign corporations, and commercial paper. These investments are subject to general credit, liquidity, market and interest rate risks, including potential future impacts from economic, capital market or bank instability. We may from time to time have balances in bank accounts that are in excess of insured deposit limits, and could be subject to risks of bank failures. We may realize losses in the fair value of these investments, an inability to access cash in these investments for a potentially meaningful period, or a complete loss of these investments, which would have a negative effect on our financial statements.

In addition, should our investments cease paying or reduce the amount of interest paid to us, our interest income would suffer. The market risks associated with our investment portfolio may have an adverse effect on our results of operations, liquidity and financial condition.

If we continue to fail to maintain proper and effective internal controls, our ability to produce accurate financial statements on a timely basis could be impaired.

We are subject to the reporting requirements of the Exchange Act, the Sarbanes-Oxley Act of 2002, or Sarbanes-Oxley Act, and the rules and regulations of Nasdaq. Pursuant to Section 404 of the Sarbanes-Oxley Act, or Section 404, we are required to perform system and process evaluation and testing of our internal control over financial reporting to allow our management to report on the effectiveness of our internal control over financial reporting. However, while we remain a non-accelerated filer or an emerging growth company, we will not be required to include an attestation report on internal control over financial reporting issued by our independent registered public accounting firm.

During the evaluation and testing process, we have identified a material weakness as described under Part I, Item 4 of this Form 10-Q/A. If we fail to remediate that material weakness, or if we identify one or more material weaknesses in our internal control over financial reporting, we will be unable to assert that our internal control over financial reporting is effective. Further, we may in the future discover additional weaknesses in our system of internal financial and accounting controls and procedures that could result in additional material misstatements of our financial statements. Moreover, our internal controls over financial reporting will not prevent or detect all errors and all fraud. A control system, no matter how well designed and operated, can provide only reasonable, not absolute, assurance that the control system’s objectives will be met. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that misstatements due to error or fraud will not occur or that all control issues and instances of fraud will be detected. Moreover, we are aware that the remote working arrangements implemented in connection with the COVID-19

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pandemic potentially present new areas of risk, and we continue to carefully monitor any impact to our internal controls and procedures.

Our limited resources and recent reductions in force, as well as the turnover in our board of directors and the potential for future management changes, present significant continuity risk and could impact our ability to remediate our material weakness and maintain effective internal control over financial reporting in the future.

If we are unable to remedy our material weakness and assert that our internal control over financial reporting is effective, investors could lose confidence in the reliability of our financial statements, the market price of our stock could decline and we could be subject to sanctions or investigations by Nasdaq, the SEC or other regulatory authorities.

The restatement of our prior quarterly financial statements may affect stockholder and investor confidence in us or harm our reputation, and may subject us to additional risks and uncertainties, including increased costs and the increased possibility of legal proceedings and regulatory inquiries, sanctions or investigations.

Subsequent to the filing of the Original Report, in connection with the restatement, management identified a material weakness in the Company’s internal control over financial reporting, specific to the evaluation of information that was known or knowable at the time of the transaction or event. Refer to the section titled “Restatement” in Note 1 to the unaudited interim condensed consolidated financial statements as of and for the three months ended March 31, 2023 included in this Form 10-Q/A.

As a result of the restatement described above, we have incurred, and may continue to incur, unanticipated costs for accounting and legal fees in connection with, or related to, such restatement. In addition, such restatement could subject us to a number of additional risks and uncertainties, including the increased possibility of legal proceedings and inquiries, sanctions or investigations by the SEC or other regulatory authorities. Any of the foregoing may adversely affect our reputation, the accuracy and timing of our financial reporting, or our business, results of operations, liquidity and financial condition, or cause stockholders, investors, members and customers to lose confidence in the accuracy and completeness of our financial reports or cause the market price of our common stock to decline.

Risks Related to Intellectual Property

We currently license patent rights from Northwestern University. If Northwestern University does not properly or successfully obtain, maintain or enforce the patents underlying such licenses, or if they retain or license to others any competing rights, our competitive position and business prospects may be adversely affected.

We rely on intellectual property rights licensed from third parties to protect our technology. We are a party to a number of licenses that give us rights to third-party intellectual property that is necessary or useful for our business. In particular, we have a license from Northwestern University, which provides us the exclusive worldwide right under certain patents and patent applications owned by Northwestern University to exploit therapeutics and processes using nanoparticles, nanotechnology, microtechnology and nanomaterial-based constructs as therapeutics or accompanying therapeutics as a means of administration. To the extent we are successful in selling, licensing or otherwise generating value from our historical assets, it would depend significantly on the value of the rights licenses from Northwestern. We may also license additional third-party intellectual property in the future. Our success will depend in part on the ability of our licensors to obtain, maintain and enforce patent protection for our licensed intellectual property, and in particular, for those patents to which we have secured exclusive rights. Our licensors may not successfully prosecute the patent applications licensed to us. Even if patents issue or are granted, our licensors may fail to maintain these patents, may determine not to pursue litigation against other companies that are infringing these patents, or may pursue litigation less aggressively than we would. Further, we may not obtain exclusive rights, which would allow for third parties to develop competing therapeutics. Without protection for, or exclusive rights to, the intellectual property we license, other companies might be able to offer substantially identical therapeutics for sale, which could adversely affect our competitive business position and harm our business prospects.

We or our licensors, or any current or future strategic partners, may become subject to third-party claims or litigation alleging infringement of patents or other proprietary rights or seeking to invalidate patents or other proprietary rights, and we may need to resort to litigation to protect or enforce our patents or other proprietary rights, all of which could be costly, time consuming, or put our patents and other proprietary rights at risk.

We or our licensors, or any current or future strategic partners, may be subject to third-party claims for infringement or misappropriation of patent or other proprietary rights. We are generally obligated under our license agreements to indemnify and hold harmless our licensors for damages arising from intellectual property infringement by us. If we or our licensors, or any current or future strategic partners, are found to infringe a third-party patent or other intellectual property

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rights, we could be required to pay damages, potentially including treble damages, if we are found to have willfully infringed. In addition, we or our licensors, or any current or future strategic partners, may choose to seek, or be required to seek, a license from a third-party, which may not be available on acceptable terms, if at all. Even if a license can be obtained on acceptable terms, the rights may be non-exclusive, which could give our competitors access to the same technology or intellectual property rights licensed to us. If we fail to obtain a required license, we or any current or future collaborator may be unable to effectively market therapeutic candidates based on our technology, which could limit our ability to generate revenue or achieve profitability and possibly prevent us from generating revenue sufficient to sustain our operations. In addition, we may find it necessary to pursue claims or initiate lawsuits to protect or enforce our patent or other intellectual property rights. The cost to us in defending or initiating any litigation or other proceeding relating to patent or other proprietary rights, even if resolved in our favor, could be substantial, and litigation would divert our management’s attention. 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. Uncertainties resulting from the initiation and continuation of patent litigation or other proceedings could delay our research and development efforts and limit our ability to continue our operations.

If we were to initiate legal proceedings against a third-party to enforce a patent covering one of our therapeutics or our technology, the defendant could counterclaim that our patent is invalid or unenforceable. In patent litigation in the U.S., defendant counterclaims alleging invalidity or unenforceability are commonplace. Grounds for a validity challenge could be an alleged failure to meet any of several statutory requirements, for example, 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, or made a misleading statement, during prosecution. The outcome following legal assertions of invalidity and unenforceability during patent litigation is unpredictable. With respect to the validity question, for example, we cannot be certain that there is no invalidating prior art, of which we and the patent examiner were unaware during prosecution. If a defendant were to prevail on a legal assertion of invalidity or unenforceability, we would lose at least part, and perhaps all, of the patent protection on one or more of our therapeutics or certain aspects of our technology. Such a loss of patent protection could have a material adverse impact on our business. Patents and other intellectual property rights also will not protect our technology if competitors design around our protected technology without legally infringing our patents or other intellectual property rights.

It is also possible that we have failed to identify relevant third-party patents or applications. For example, U.S. applications filed before November 29, 2000 and certain U.S. applications filed after that date that will not be filed outside the U.S. remain confidential until patents issue. 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 therapeutics or technology could have been filed by others without our knowledge. Additionally, pending patent applications which have been published can, subject to certain limitations, be later amended in a manner that could cover our SNA technology, our therapeutics or the use of our therapeutics. Third-party intellectual property right holders may also actively bring infringement claims against us. We cannot guarantee that we will be able to successfully settle or otherwise resolve such infringement claims. If we are unable to successfully settle future claims on terms acceptable to us, we may be required to engage in or continue costly, unpredictable and time-consuming litigation and may be prevented from or experience substantial delays in marketing our therapeutics. If we fail in any such dispute, in addition to being forced to pay damages, we may be temporarily or permanently prohibited from commercializing any of our therapeutic candidates that are held to be infringing. We might, if possible, also be forced to redesign therapeutic candidates so that we no longer infringe 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.

We may be subject to claims challenging the inventorship or ownership of our patents and other intellectual property.

We may also be subject to claims that former employees or other third parties have an ownership interest in our patents or other intellectual property. Litigation may be necessary to defend against these and other claims challenging inventorship or ownership. If we fail in defending any such claims, in addition to paying monetary damages, we may lose valuable intellectual property rights. Such an outcome could have a material adverse effect on our business. Even if we are successful in defending against such claims, litigation could result in substantial costs and distraction to management and other employees.

If we fail to comply with our obligations under any license, collaboration or other agreements, we may be required to pay damages and could lose intellectual property rights that are necessary for developing and protecting our therapeutic candidates or we could lose certain rights to grant sublicenses.

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Our current licenses impose, and any future licenses we enter into are likely to impose, various development, commercialization, funding, milestone, royalty, diligence, sublicensing, insurance, patent prosecution and enforcement, and other obligations on us. If we breach any of these obligations, or use the intellectual property licensed to us in an unauthorized manner, we may be required to pay damages and the licensor may have the right to terminate the license, which could result in us being unable to develop, manufacture and sell therapeutics that are covered by the licensed technology or could enable a competitor to gain access to the licensed technology. Moreover, our licensors may own or control intellectual property that has not been licensed to us and, as a result, we may be subject to claims, regardless of their merit, that we are infringing or otherwise violating the licensor’s rights in such unlicensed intellectual property. In addition, while we cannot currently determine the amount of the royalty obligations we would be required to pay on sales of future therapeutics, if any, the amounts may be significant. The amount of our future royalty obligations will depend on the technology and intellectual property we use in therapeutics that we successfully develop and commercialize, if any. Therefore, even if we successfully develop and commercialize therapeutics, we may be unable to achieve or maintain profitability.

Risks Related to Ownership of Our Common Stock

Our status as a “controlled company” could make our Common Stock less attractive to some investors or otherwise harm the trading price of our Common Stock.

More than 50% of our voting power is held by CBI USA. As a result, we are a “controlled company” under the corporate governance rules for Nasdaq-listed companies and may elect not to comply with certain Nasdaq corporate governance requirements with respect to board independence and compensation and nominating committee functions. We are relying on these exceptions. Following the closing of the Private Placement, our board includes 5 members, 2 of whom are affiliated or associated with CBI USA or were otherwise delegated by CBI USA. Investors may be hesitant to invest in the Company absent compliance with these governance requirements. In addition, should the interest or interests of our controlling stockholder differ from those of other stockholders, the other stockholders may not have the same protections afforded to stockholders of companies that are subject to all of the corporate governance rules for Nasdaq-listed companies. Our status as a controlled company could make our Common Stock less attractive to some investors, including but not limited to potential strategic partners, or otherwise harm our stock price.

Additionally, it is possible we could pursue strategic or financing transactions with our controlling stockholder or its affiliates. The interests of the controlling stockholder and other stockholders would diverge in this case, and the lack of an independent board to evaluate such a transaction could adversely impact other stockholders. These conflicts of interest (or the perception that they could occur) might adversely affect our business and prospects for obtaining financing or completing a strategic transaction.

For so long as CBI USA owns a majority of our common stock, it will have sufficient votes to elect a majority of our directors and to approve any other corporate action requiring the affirmative vote of holders of a majority of the outstanding shares of our Common Stock. Our control by a single stockholder, and our reliance on the Nasdaq controlled company exemptions, could deter investment in the Company and adversely impact our stock price and ability to obtain financing. These impacts may be more pronounced in the near term as investors assess the direction of the Company under the control of CBI USA and the actions of the new board. Potential partners considering engaging in a strategic transaction with the Company could have similar concerns. Given our urgent need for additional funding and/or to complete a strategic transaction, it is imperative that our controlling stockholder and our board earn the confidence of investors and potential partners in the near term and there is no assurance this will occur.

The market price of our common stock has been, and is likely to continue to be, highly volatile, and you may not be able to resell your shares at or above the price you paid for them.

Our stock price will continue to be volatile. As a result of this volatility, investors may not be able to sell their common stock at or above the price paid for the shares. The market price for our common stock may be influenced by a variety of factors, including the other risks described in this section titled “Risk Factors” and the following:

•our ability or inability to raise additional capital and the terms on which we raise it;

•the development, execution and announcement of any proposed strategic alternative;

•investors may react negatively to our controlled company status and the influence of our controlling stockholder or our reconstituted board and/or our uncertain business strategy;

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•strategic decisions by us or our competitors, such as acquisitions, divestitures, spin-offs, joint ventures, strategic investments or changes in business strategy;

•we are unable to achieve the perceived benefits of our Company as rapidly or to the extent anticipated by financial or industry analysts; and

•changes in general economic, industry, political and market conditions, including, but not limited to, the ongoing impact of the COVID-19 pandemic.

In addition, the stock markets in general, and the markets for pharmaceutical and biotechnology stocks in particular, have experienced extreme volatility that has been often unrelated to the operating performance of the issuer. These broad market and industry factors, such as those related to the COVID-19 pandemic and Russia’s invasion of Ukraine and retaliatory actions taken by the United States, NATO and others, may seriously harm the market price of our common stock, regardless of our operating performance.

Raising additional funds by issuing securities may cause dilution to existing stockholders and raising funds through lending and licensing arrangements may restrict our operations or require us to relinquish proprietary rights.

Until such time, if ever, as we can generate substantial revenues, we expect to attempt to finance our cash needs through a combination of equity offerings and debt financings. As discussed elsewhere, it may be very challenging to obtain equity or debt financing given the current transitional state of the Company. However, to the extent that we raise additional capital through the issuance of shares or other securities convertible into shares, our stockholders will be diluted. Future issuances of our common stock or other equity securities, or the perception that such sales may occur, could adversely affect the prevailing market price of our common stock and impair our ability to raise capital through future offerings of equity or equity-linked securities.

We are an “emerging growth company” and we cannot be certain if the reduced reporting requirements applicable to emerging growth companies will make our common stock less attractive to investors.

We are an “emerging growth company” as defined in the JOBS Act. For as long as we continue to be an emerging growth company, we may take advantage of exemptions from various reporting requirements that are applicable to other public companies that are not emerging growth companies, including (1) not being required to comply with the auditor attestation requirements of Section 404 of the Sarbanes-Oxley Act, (2) reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements and (3) exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and stockholder approval of any golden parachute payments not previously approved. In addition, as an emerging growth company, we are only required to provide two years of audited financial statements and two years of selected financial data. We expect to lose emerging growth company status at the end of this year. Even after we no longer qualify as an emerging growth company, we may still qualify as a “smaller reporting company” and/or “non-accelerated filer” which would allow us to take advantage of many 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. We cannot predict if investors will find our common stock less attractive because we may rely on these exemptions. If some investors find our common stock less attractive as a result, there may be a less active trading market for our common stock and our share price may be more volatile.

Anti-takeover provisions in our charter documents and under the General Corporation Law of the State of Delaware could make an acquisition of us more difficult and may prevent attempts by our stockholders to replace or remove our management.

Provisions in our amended and restated certificate of incorporation and our bylaws may delay or prevent an acquisition of us or a change in our management. These provisions include a classified board of directors, a prohibition on actions by written consent of our stockholders, and the ability of the Board of Directors of the Company, or the Board, to issue preferred stock without stockholder approval. In addition, because we are incorporated in Delaware, we are governed by the provisions of Section 203 of the Delaware General Corporation Law, or DGCL, which prohibits stockholders owning in excess of 15% of the outstanding combined organization voting stock from merging or combining with the combined organization. Although we believe these provisions collectively will provide for an opportunity to receive higher bids by requiring potential acquirers to negotiate with our Board, they would apply even if the offer may be considered beneficial by some stockholders. In addition, these provisions may frustrate or prevent any attempts by our stockholders to replace or remove then-current management by making it more difficult for stockholders to replace members of the Board, which is responsible for appointing the members of management.

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Our amended and restated certificate of incorporation designates the Court of Chancery of the State of Delaware as the sole and exclusive forum for certain types of actions and proceedings that may be initiated by our stockholders, which could limit our stockholders’ ability to obtain a favorable judicial forum for disputes with us or our directors, officers, employees or agents.

Our amended and restated certificate of incorporation provides that, unless we consent in writing to an alternative forum, the Court of Chancery of the State of Delaware will be the sole and exclusive forum for any of the following types of actions or proceedings under Delaware statutory or common law: derivative action or proceeding brought on our behalf, any action asserting a claim of breach of a fiduciary duty owed by any of our directors, officers, employees or agents to us or our stockholders, any action asserting a claim arising pursuant to any provision of the DGCL, our amended and restated certificate of incorporation or our amended and restated bylaws or any action asserting a claim that is governed by the internal affairs doctrine, in each case subject to the Court of Chancery having personal jurisdiction over the indispensable parties named as defendants therein. This provision would not apply to suits brought to enforce a duty or liability created by the Exchange Act, or any other claims for which a court or forum other than the Court of Chancery has exclusive jurisdiction or for which the Court of Chancery does not have subject matter jurisdiction. Furthermore, Section 22 of the Securities Act, creates concurrent jurisdiction for federal and state courts over all Securities Act actions. Accordingly, both state and federal courts have jurisdiction to entertain such claims. Our amended and restated certificate of incorporation also provides that any person purchasing or otherwise acquiring any interest in any shares of our common stock shall be deemed to have notice of and to have consented to this provision of our amended and restated certificate of incorporation.

This choice of forum provision may limit our stockholders’ ability to bring a claim in a judicial forum that it finds favorable for disputes with us or our directors, officers, employees or agents, which may discourage such lawsuits against us and our directors, officers, employees and agents even though an action, if successful, might benefit our stockholders. Stockholders who do bring a claim in the Court of Chancery could face additional litigation costs in pursuing any such claim, particularly if they do not reside in or near Delaware. The Court of Chancery may also reach different judgments or results than would other courts, including courts where a stockholder considering an action may be located or would otherwise choose to bring the action, and such judgments or results may be more favorable to us than to our stockholders. If a court were to find this exclusive forum provision in our amended and restated certificate of incorporation to be inapplicable or unenforceable in any action, we may incur further significant additional costs associated with resolving the dispute in other jurisdictions, all of which could have a material adverse effect on our business, financial condition or results of operations.

Our ability to use our net operating loss carryforwards and certain other tax attributes may be limited.

We have incurred substantial losses during our history and do not expect to become profitable in the near future and we may never achieve profitability. Our net operating loss, or NOL, carryforwards generated in tax years beginning on or before December 31, 2017, are only permitted to be carried forward for 20 years under applicable U.S. tax law. Under the Tax Cuts and Jobs Act, as modified by the CARES Act, our federal NOLs generated in tax years beginning after December 31, 2017, may be carried forward indefinitely, but the deductibility of such federal NOLs is be limited to 80% of taxable income. In addition, under Sections 382 and 383 of the Internal Revenue Code of 1986, as amended, and corresponding provisions of state law, if a corporation undergoes an “ownership change,” generally defined as a greater than 50% change (by value) in its equity ownership over a three-year period, the corporation’s ability to use its pre-change NOL, and other pre-change tax attributes (such as research tax credits) to offset its post-change income or taxes may be limited. We have experienced ownership changes in the past. We completed a review of our changes in ownership through December 31, 2022 and determined that we experienced an “ownership change” within the meaning of Section 382(g) during the fourth quarter of 2022. This ownership change has and will continue to subject our net operating loss carryforwards to an annual limitation, which will significantly restrict our ability to use them to offset our taxable income in periods following the ownership change.

We determined that at the date of the 2022 ownership change, we had a net unrealized built-in loss (“NUBIL”). The NUBIL was determined based on the difference between the fair market value of our assets and their tax basis at the ownership change date. Because of the NUBIL, certain deductions recognized during the five-year period beginning on the date of the IRC Section 382 ownership change (the "recognition period") are subject to the same limitation as the net operating loss carryforwards or certain other deductions.

In addition, we may experience ownership changes in the future as a result of subsequent shifts in our stock ownership, some of which are outside of our control. As a result, if we earn net taxable income, our ability to use our pre-change NOL carryforwards to offset U.S. federal taxable income may be subject to limitations, which could potentially

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result in increased future tax liability to us. In addition, at the state level, there may be periods during which the use of NOLs is suspended or otherwise limited, which could accelerate or permanently increase state taxes owed.

General Risk Factors

FINRA sales practice requirements may limit a stockholder’s ability to buy and sell our stock due to our low stock price.

The Financial Industry Regulatory Authority, or FINRA, has adopted rules requiring that, in recommending an investment to a customer, a broker-dealer must have reasonable grounds for believing that the investment is suitable for that customer. Prior to recommending speculative or low-priced securities to their non-institutional customers, broker-dealers must make reasonable efforts to obtain information about the customer’s financial status, tax status, investment objectives and other information. Under interpretations of these rules, FINRA has indicated its belief that there is a high probability that speculative or low-priced securities will not be suitable for at least some customers. If these FINRA requirements are applicable to us or our securities, which we believe they are, they may make it more difficult for broker-dealers to recommend that at least some of their customers buy our common stock, which may limit the ability of our stockholders to buy and sell our common stock and could have an adverse effect on the market for and price of our common stock.

If securities or industry analysts do not publish research or reports about our business, or if they issue an adverse or misleading opinion regarding our stock, our stock price and trading volume could decline.

The trading market for our common stock will be influenced by the research and reports that industry or securities analysts publish about us or our business. Our research coverage by securities and industry analysts is currently limited. In addition, because we did not become a reporting company by conducting an underwritten initial public offering of our common stock, security analysts of brokerage firms may not provide wider coverage of our Company. In addition, investment banks may be less likely to agree to underwrite secondary offerings on our behalf than they might if we became a public reporting company by means of an underwritten initial public offering, because they may be less familiar with our Company as a result of more limited coverage by analysts and the media, and because we became public at an early stage in our development. The failure to receive wider research coverage or support in the market for our shares will have an adverse effect on our ability to develop a liquid market for our common stock and the trading price for our stock would be negatively impacted.

In the event we obtain wider securities or industry analyst coverage, if any of the analysts who cover us issue an adverse or misleading opinion regarding us, our business model, our intellectual property or our stock performance, or if our target studies and operating results fail to meet the expectations of analysts, our stock price would likely decline. If one or more of these analysts cease coverage of us or fail to publish reports on us regularly, we could lose visibility in the financial markets, which in turn could cause our stock price or trading volume to decline.

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Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.

On February 24, 2023, in connection with the closing of the September 2022 Private Placement, we issued a total of 3,400,000 shares of the Company’s common stock to CBI USA at a purchase price of $1.60 per share, resulting in approximately $5.4 million in gross proceeds to the Company.

The offer and sale of the September 2022 PIPE Shares in the September 2022 Private Placement were exempt from registration under Section 4(a)(2) of the Securities Act.

Item 3. Defaults Upon Senior Securities.

None.

Item 4. Mine Safety Disclosures.

Not applicable.

Item 5. Other Information.

Not applicable.

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Item 6. Exhibits

		Incorporated by Reference
Exhibit No.	Exhibit Description	Form	Exhibit No.	Filing Date	File No.
3.1	Certificate of Amendment to Certificate of Incorporation, filed with the Secretary of State of the State of Delaware on September 26, 2017.	8-K	3.2	10/02/17	000-55764
3.2	Amended and Restated Certificate of Incorporation, as filed with the Secretary of State of the State of Delaware on November 15, 2017.	10-K	3.3	3/11/21	001-39011
3.3	Certificate of Amendment to Amended and Restated Certificate of Incorporation of Exicure, Inc., effective June 29, 2022.	8-K	3.1	06/29/22	001-39011
3.4	Amended and Restated Bylaws, as currently in effect.	8-K	3.4	10/02/17	000-55764
31.1*	Certification of Principal Executive Officer Pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934, As Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2*	Certification of Principal Financial Officer Pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934, As Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
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.
101.INS*	Inline XBRL Instance Document – the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document
101.SCH*	Inline XBRL Taxonomy Extension Schema Document
101.CAL*	Inline XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF*	Inline XBRL Taxonomy Extension Definition Linkbase Document
101.LAB*	Inline XBRL Taxonomy Extension Label Linkbase Document
101.PRE*	Inline XBRL Taxonomy Extension Presentation Linkbase Document
104*	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)

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† Indicates that portions of this exhibit have been omitted pursuant to Item 601(b)(10)(iv) of Regulation S-K.

* Filed herewith.

** The certification attached as Exhibit 32.1 that accompanies this Quarterly Report on Form 10-Q is not deemed filed with the SEC and is not to be incorporated by reference into any filing of Exicure, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended (whether made before or after the date of such Form 10-Q), irrespective of any general incorporation language contained in such filing.

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SIGNATURES

Pursuant to the requirements 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.

Date: June 6, 2024

EXICURE, INC.
By:	/s/ Paul Kang
	Paul Kang
	Chief Executive Officer
By:	/s/ Joshua Miller
	Joshua Miller
	Chief Accounting Officer

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EX-31.1

Exhibit 31.1

CERTIFICATIONS

I, Paul Kang, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q/A of Exicure, 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(s) 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(s) 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: June 6, 2024

/s/ Paul Kang

Paul Kang

Chief Executive Officer

(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATIONS

I, Jiyoung Hwang, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q/A of Exicure, 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(s) 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(s) 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: June 6, 2024

/s/ Jiyoung Hwang

Jiyoung Hwang

Chief Financial Officer

(Principal Financial Officer)

EX-32.1

Exhibit 32.1

SECTION 1350 CERTIFICATIONS*

Pursuant to the requirement set forth in Rule 13a-14(b) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C. § 1350), Paul Kang, Chief Executive Officer of Exicure, Inc. (the “Company”), and Jiyoung Hwang, Chief Financial Officer of the Company, each hereby certifies that, to the best of his or her knowledge:

1. The Company’s Quarterly Report on Form 10-Q/A for the period ended March 31, 2023, to which this Certification is attached as Exhibit 32.1 (the “Periodic Report”), fully complies with the requirements of Section 13(a) or Section 15(d) of the Exchange Act; and

2. The information contained in the Periodic Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: June 6, 2024

IN WITNESS WHEREOF, the undersigned have set their hands hereto as of the 6th day of June, 2024.

/s/ Paul Kang	/s/ Jiyoung Hwang
Paul Kang	Jiyoung Hwang
Chief Executive Officer	Chief Financial Officer
(Principal Executive Officer)	(Principal Financial Officer)

* This certification accompanies the Quarterly Report on Form 10-Q/A, to which it relates is not deemed filed with the Securities and Exchange Commission and is not to be incorporated by reference into any filing of Exicure, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended (whether made before or after the date of the Quarterly Report on Form 10-Q/A), irrespective of any general incorporation language contained in such filing.

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Cover Page - shares	3 Months Ended
	Mar. 31, 2023	Jul. 10, 2023
Cover [Abstract]
Document Type	10-Q/A
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2023
Document Transition Report	false
Entity File Number	001-39011
Entity Registrant Name	EXICURE, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	81-5333008
Entity Address, Address Line One	2430 N. Halsted St.
Entity Address, City or Town	Chicago
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60614
City Area Code	(847)
Local Phone Number	673-1700
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	XCUR
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		8,648,307
Entity Central Index Key	0001698530
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q1
Amendment Flag	false

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UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 9,960	$ 8,577
Prepaid expenses and other assets	1,317	1,474
Total current assets	11,277	10,051
Property and equipment, net	2,279	2,530
Right-of-use asset	7,077	7,257
Other noncurrent assets	3,310	3,490
Total assets	23,943	23,328
Current liabilities:
Accounts payable	452	361
Accrued expenses and other current liabilities	1,477	1,278
Common stock warrant liability	800	0
Total current liabilities	2,729	1,639
Lease liability, noncurrent	6,595	6,767
Total liabilities	9,324	8,406
Stockholders’ equity:
Preferred stock, $0.0001 par value per share; 10,000,000 shares authorized, no shares issued and outstanding, March 31, 2023 and December 31, 2022	0	0
Common stock, $0.0001 par value per share; 200,000,000 shares authorized, 8,371,462 issued and outstanding, March 31, 2023; 4,965,901 issued and outstanding, December 31, 2022	1	0
Additional paid-in capital	191,674	187,571
Accumulated deficit	(177,056)	(172,649)
Total stockholders’ equity	14,619	14,922
Total liabilities and stockholders’ equity	$ 23,943	$ 23,328

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UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Mar. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	8,371,462	4,965,901
Common stock, shares outstanding (in shares)	8,371,462	4,965,901

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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenue:
Collaboration revenue	$ 0	$ 2,565,000
Total revenue	0	2,565,000
Operating expenses:
Research and development expense	1,423,000	7,140,000
General and administrative expense	3,116,000	3,162,000
Total operating expenses	4,539,000	10,302,000
Operating loss	(4,539,000)	(7,737,000)
Other income (expense), net:
Dividend income	17,000	2,000
Interest income	11,000	2,000
Interest expense	0	(595,000)
Other income (expense), net	104,000	(20,000)
Total other income (expense), net	132,000	(611,000)
Net loss before provision for income taxes	(4,407,000)	(8,348,000)
Provision for income taxes	0	0
Net loss	$ (4,407,000)	$ (8,348,000)
Basic loss per common share (in dollars per share)	$ (0.70)	$ (2.07)
Diluted loss per common share (in dollars per share)	$ (0.70)	$ (2.07)
Weighted-average basic common shares outstanding (in shares)	6,288,952	4,031,316
Weighted-average diluted common shares outstanding (in shares)	6,288,952	4,031,316

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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net loss	$ (4,407)	$ (8,348)
Other comprehensive (loss), net of taxes
Unrealized (loss) on available for sale securities, net of tax	0	(3)
Other comprehensive (loss)	0	(3)
Comprehensive loss	$ (4,407)	$ (8,351)

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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in- Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 31, 2021		3,626,073
Beginning balance at Dec. 31, 2021	$ 11,232	$ 0	$ 181,301	$ (170,067)	$ (2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of common stock warrants (in shares)		466,666
Exercise of common stock warrants	14		14
Equity-based compensation	342		342
Vesting of restricted stock units and related repurchases (in shares)		324
Vesting of restricted stock units and related repurchases	(1)		(1)
Other comprehensive loss, net	(3)				(3)
Net loss	(8,348)			(8,348)
Ending balance (in shares) at Mar. 31, 2022		4,093,063
Ending balance at Mar. 31, 2022	$ 3,236	$ 0	181,656	(178,415)	(5)
Beginning balance (in shares) at Dec. 31, 2022	4,965,901	4,965,901
Beginning balance at Dec. 31, 2022	$ 14,922	$ 0	187,571	(172,649)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity-based compensation	308		308
Reclassification of common stock warrants to liability	(800)		(800)
Vesting of restricted stock units and related repurchases (in shares)		5,561
Vesting of restricted stock units and related repurchases	(1)	$ 1	(2)
Issuance of common stock, net (in shares)		3,400,000
Issuance of common stock, net	4,597		4,597
Other comprehensive loss, net	0
Net loss	$ (4,407)			(4,407)
Ending balance (in shares) at Mar. 31, 2023	8,371,462	8,371,462
Ending balance at Mar. 31, 2023	$ 14,619	$ 1	$ 191,674	$ (177,056)	$ 0

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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net loss	$ (4,407)	$ (8,348)
Adjustments to reconcile net loss to cash used in operating activities:
Depreciation and amortization	251	302
Equity-based compensation	308	342
Amortization of long-term debt issuance costs and fees	0	477
Amortization of right-of-use asset	180	169
Amortization of investments	0	(1)
Other	(105)	19
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	157	1,727
Other noncurrent assets	180	4
Accounts payable	91	(1,495)
Accrued expenses	199	(3,237)
Deferred revenue	0	(2,565)
Other liabilities	(172)	(150)
Net cash used in operating activities	(3,318)	(12,756)
Cash flows from investing activities:
Purchase of available for sale securities	0	(1,499)
Proceeds from sale or maturity of available for sale securities	0	3,500
Capital expenditures	0	(6)
Proceeds from sale of capital assets	106	0
Net cash provided by investing activities	106	1,995
Cash flows from financing activities:
Repayment of long-term debt	0	(7,500)
Payment of long-term debt fees and issuance costs	0	(506)
Proceeds from common stock offering	5,440	0
Payment of common stock financing costs	(843)	0
Proceeds from exercise of common stock warrants	0	14
Payments for minimum statutory tax withholding related to net share settlement of equity awards	(2)	(1)
Net cash provided by (used in) provided by financing activities	4,595	(7,993)
Net increase (decrease) in cash, cash equivalents, and restricted cash	1,383	(18,754)
Cash, cash equivalents, and restricted cash - beginning of period	9,777	43,844
Cash, cash equivalents, and restricted cash - end of period	11,160	25,090
Non-cash financing activities:
Reclassification of common stock warrants to liability	$ 800	$ 0

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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Statement of Cash Flows [Abstract]
Cash and cash equivalents	$ 9,960	$ 8,577
Restricted cash included in other noncurrent assets	1,200	1,200
Total cash, cash equivalents, and restricted cash shown in the unaudited condensed consolidated statements of cash flows	$ 11,160	$ 9,777

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Description of Business, Basis of Presentation, Going Concern and Restatement of Financial Statement

3 Months Ended

Mar. 31, 2023

Accounting Policies [Abstract]

Description of Business, Basis of Presentation, Going Concern and Restatement of Financial Statement

Description of Business, Basis of Presentation, Going Concern and Restatement of Financial Statement

Description of Business

Exicure, Inc. has historically been an early-stage biotechnology company focused on developing nucleic acid therapies targeting ribonucleic acid against validated targets. In September 2022, the Company announced a significant reduction in force, suspension of preclinical activities and halting of all research and development, and that the Company was exploring strategic alternatives to maximize stockholder value. While the foregoing efforts are continuing, the Company does not expect they will generate significant value for stockholders, at least in the near term. Therefore, the Company is engaging in a broader exploration of strategic alternatives. This effort involves exploring growth through transactions with potential partners that see opportunity in joining an existing, publicly-traded organization. The Company is exploring transactions in industries unrelated to its historical operations.

Throughout these unaudited condensed consolidated financial statements, the terms the “Company,” and “Exicure” refer to Exicure, Inc. and where appropriate, its wholly owned subsidiary, Exicure Operating Company. Exicure Operating Company holds all material assets and conducts all business activities and operations of Exicure, Inc. 

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements as of March 31, 2023 and December 31, 2022, and for the three months ended March 31, 2023 and 2022, have been presented in conformity with accounting principles generally accepted in the United States of America (“GAAP”).

Principles of Consolidation

The accompanying unaudited condensed consolidated financial statements include the accounts of Exicure and its wholly owned subsidiary, Exicure Operating Company. All intercompany transactions and accounts are eliminated in consolidation.

Unaudited Interim Financial Information

The accompanying interim condensed consolidated balance sheet as of March 31, 2023, the interim condensed consolidated statements of operations for the three months ended March 31, 2023 and 2022, the interim condensed consolidated statements of comprehensive loss for the three months ended March 31, 2023 and 2022, the interim condensed consolidated statements of changes in stockholders’ equity for the three months ended March 31, 2023 and 2022, and the interim condensed consolidated statements of cash flows for the three months ended March 31, 2023 and 2022 are unaudited. The interim unaudited condensed consolidated financial statements have been prepared on the same basis as the annual audited financial statements and with instructions to Form 10-Q and Article 10 of Regulation S-X under the Securities Exchange Act of 1934, as amended; and in the opinion of management, reflect all adjustments, which include only normal recurring adjustments necessary for the fair statement of the Company’s financial position as of March 31, 2023, the results of its operations for the three months ended March 31, 2023 and 2022, and the results of its cash flows for the three months ended March 31, 2023 and 2022. The financial data and other information disclosed in these notes related to the three months ended March 31, 2023 and 2022 are unaudited. The results for the three months ended March 31, 2023 are not necessarily indicative of results to be expected for the year ending December 31, 2023, or any other interim periods, or any future year or period.

Going Concern

At each reporting period, the Company evaluates whether there are conditions or events that raise substantial doubt about the Company’s ability to continue as a going concern for a period of one year after the date that the

financial statements are issued. The Company is required to make certain additional disclosures if it concludes substantial doubt exists and it is not alleviated by the Company’s plans or when its plans alleviate substantial doubt about the Company’s ability to continue as a going concern.

The accompanying unaudited condensed consolidated financial statements have been prepared assuming that the Company will continue as a going concern for a period of one year after the date that the financial statements are issued. As of March 31, 2023, the Company has generated an accumulated deficit of $195,893 since inception and expects to incur significant expenses and negative cash flows for the foreseeable future. As of March 31, 2023, the Company’s cash, and cash equivalents were $9,960. Management believes that, given the Company’s current cash position, operating plans and forecasted negative cash flows from operating activities over the next twelve months, there is substantial doubt about the Company’s ability to continue as a going concern within one year after the date these financial statements are issued. Substantial additional financing will be needed by the Company to fund its operations.

Management believes that the Company’s existing cash and cash equivalents will fund its operating expenses into the fourth quarter of 2023. However, this estimate is based on assumptions about how the Company can limit spending that may prove to be wrong. It is very difficult to project the Company’s current cash burn rate given the transitional status of the Company and this estimate may prove inaccurate. Depending on the direction of the Company’s review of strategic alternatives, the Company may use available resources sooner than management currently expects. The Company has already engaged in significant cost reductions, so our ability to further cut costs and extend the Company’s operating runway is limited. As a result, substantial additional financing will be needed by the Company within the next few months to pay expenses, fund the ongoing exploration of strategic alternatives and pursue any alternatives that may be identified. The Company seeks to raise capital in the third quarter of 2023 to fund its operations through 2024. There can be no assurance that such additional financing will be available and, if available, can be obtained on acceptable terms.

The accompanying unaudited condensed consolidated financial statements have been prepared as though the Company will continue as a going concern, which contemplates the realization of assets and satisfaction of liabilities in the normal course of business. The financial statements do not include any adjustments relating to the recoverability and classification of recorded asset amounts or the amounts and classification of liabilities that might be necessary should the Company be unable to continue as a going concern.

Restatement

The Company is restating its previously issued condensed consolidated financial statements and related notes as of and for the three months ended March 31, 2023. The Company identified an error related to the incorrect classification of certain expenses as research and development expenses on the condensed consolidated statements of operations for the three months ended March 31, 2023.

The following table illustrates the effects of the error corrections to operating expenses:

	Previously Reported		Adjustments		Restated
Research and development expense	$	1,981	$	(558)	$	1,423
General and administrative expense	2,558		558		3,116
Total operating expenses	$	4,539	$	—	$	4,539

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Significant Accounting Policies

3 Months Ended

Mar. 31, 2023

Accounting Policies [Abstract]

Significant Accounting Policies

Significant Accounting Policies

The Company’s significant accounting policies are disclosed in the audited consolidated financial statements and the notes thereto, which are included in the in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022 filed with the U.S. Securities and Exchange Commission (“SEC”) on March 27, 2023, as amended by Amendment No. 1 filed with the SEC on May 1, 2023 (the “Annual Report”). Since the date of those

audited consolidated financial statements, there have been no material changes to the Company’s significant accounting policies.

Use of Estimates

The preparation of the financial statements in conformity with GAAP 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 financial statements and the reported amounts of revenues and expenses during the reporting period. Management bases its estimates on certain assumptions which it believes are reasonable in the circumstances and while actual results could differ from those estimates, management does not believe that any change in those assumptions in the near term would have a significant effect on the Company’s financial position, results of operations or cash flows. Actual results in future periods could differ from those estimates.

Significant estimates include the recording of its warrant liability. The Company calculated its warrant liability based on the Black-Scholes Model, see Note 7, Stockholders’ Equity, for further details.

Recent Accounting Pronouncements Adopted

Financial Instruments - Credit Losses

In June 2016, the FASB issued ASU 2016-13, Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). ASU 2016-13 is a new standard intended to improve reporting requirements specific to loans, receivables and other financial instruments. ASU 2016-13 requires that credit losses on financial assets measured at amortized cost be determined using an expected loss model, instead of the current incurred loss model, and requires that credit losses related to available-for-sale debt securities be recorded through an allowance for credit losses and limited to the amount by which carrying value exceeds fair value. ASU 2016-13 also requires enhanced disclosure of credit risk associated with financial assets. The effective date of ASU 2016-13 was deferred by ASU 2019-10, Financial Instruments—Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842)—Effective Dates to the annual period beginning after December 15, 2022 for companies that (i) meet the definition of an SEC filer and (ii) are eligible as “smaller reporting companies” as such term is defined by the SEC, with early adoption permitted. The Company adopted this ASU in January 2023, there was no material impact on the consolidated financial statements.

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Supplemental Balance Sheet Information

3 Months Ended

Mar. 31, 2023

Supplemental Balance Sheet Information [Abstract]

Supplemental Balance Sheet Information

Supplemental Balance Sheet Information

Prepaid expenses and other current assets

	March 31, 2023		December 31, 2022
Prepaid clinical, contract research and manufacturing costs	$	51	$	213
Prepaid insurance	750		408
Other	516		853
Prepaid expenses and other current assets	$	1,317	$	1,474

Other noncurrent assets

	March 31, 2023		December 31, 2022
Restricted cash	$	1,200	$	1,200
Prepaid insurance	2,106		2,252
Other	4		38
Other noncurrent assets	$	3,310	$	3,490

Property and equipment, net

	March 31, 2023		December 31, 2022
Scientific equipment	$	5,932	$	6,087
Computers and software	63		63
Furniture and fixtures	30		30
Property and equipment, gross	6,025		6,180
Less: accumulated depreciation and amortization	(3,746)		(3,650)
Property and equipment, net	$	2,279	$	2,530

Depreciation and amortization expense was $251 and $302 for the three months ended March 31, 2023 and 2022, respectively. During the three months ended March 31, 2023, the Company sold scientific equipment with a net book value of $7 and recognized a gain of $99 in the accompanying statement of operations for the three months ended March 31, 2023.

Accrued expenses and other current liabilities

	March 31, 2023		December 31, 2022
Accrued clinical, contract research and manufacturing costs	$	10	$	48
Accrued restructuring costs	—		48
Lease liability	561		539
Accrued payroll-related expenses	184		32
Accrued federal and state tax payable	209		209
Accrued other expenses	513		402
Accrued expenses and other current liabilities	$	1,477	$	1,278

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Debt

3 Months Ended

Mar. 31, 2023

Debt Disclosure [Abstract]

Debt

Debt

On March 15, 2022, pursuant to the terms of the Company’s Credit and Security Agreement, dated as of September 25, 2020, as amended on October 21, 2020, July 30, 2021, September 30, 2021, and December 10, 2021 with MidCap Financial Trust, as agent, and the lenders party thereto from time to time (as amended, the “MidCap Credit Agreement”), the Company repaid all remaining outstanding obligations under the MidCap Credit Agreement, including the outstanding principal balance of $7,500 and an exit fee of $506.

The Company paid interest on the MidCap Credit Agreement of $194 during the three months ended March 31, 2022.

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Leases

3 Months Ended

Mar. 31, 2023

Leases [Abstract]

Leases

Leases

The Company’s lease arrangements at March 31, 2023 consist of (i) a lease for office and laboratory space at its headquarters in Chicago, Illinois that commenced in July 2020 (the “Chicago Lease”) and (ii) a lease for office equipment (the “Office Equipment Lease”). The Chicago Lease and the Office Equipment Lease are classified as operating leases.

Chicago Lease

The Company has approximately thirty thousand square feet of office and laboratory space in Chicago, Illinois. The original term (the “Original Term”) of the Chicago Lease is 10 years, commencing on July 1, 2020 (the “Commencement Date”), which is the date the premises were ready for occupancy under the terms of the Chicago Lease. The Company has options to extend the term of the Chicago Lease for two additional successive periods of five years each (the “Extension Periods”) at the then prevailing effective market rental rate.

The initial annual base rent during the Original Term is approximately $1,113 for the first 12-month period of the Original Term, payable in monthly installments beginning on the Commencement Date. Base rent thereafter is subject to annual increases of 3%, for an aggregate amount of $12,761 over the Original Term. The Company must also pay its proportionate share of certain operating expenses and taxes for each calendar year during the term. During the first 12-month period of the Original Term, the base rent and the Company's proportionate share of operating expenses and taxes were subject to certain abatements.

The following table summarizes lease costs in the Company’s unaudited condensed consolidated statement of operations:

	Three Months Ended March 31,
	2023		2022
Operating lease costs	$	326	$	326
Variable lease costs	332		341
Short term lease costs	—		13
Total lease costs	$	658	$	680

The Company made cash payments for operating leases $646 and $872 during the three months ended March 31, 2023 and 2022, respectively.

Refer to Note 14, Subsequent Events, for more information on the Chicago Lease.

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Restructuring

3 Months Ended

Mar. 31, 2023

Restructuring and Related Activities [Abstract]

Restructuring

Restructuring

On September 26, 2022, the Company announced its commitment to a plan to wind down the Company’s research and development activities (the “September 2022 Restructuring”). This plan resulted in a reduction in force where the Company reduced approximately 66% of the Company’s existing workforce in early fourth quarter of 2022. Notified employees were offered separation benefits, including severance payments and temporary healthcare coverage assistance, the majority of which were paid in October 2022 as a lump sum payment. All of the severance costs associated with the September 2022 Restructuring represented cash expenditures and were recorded in research and development expense within the statement of operations during the third quarter of 2022.

The accrued liability balance at December 31, 2022 associated with the strategic reduction in force announced in December 2021 (the “December 2021 Restructuring”) consisted of separation benefits in the form of salary continuation pursuant to an employment agreement and was paid in January 2023.

The following table presents changes in the accrued restructuring liability balance for the period presented (in thousands):

	December 2021 Restructuring
Balance at December 31, 2022	$	48
Payments	(48)
Balance at March 31, 2023	$	—

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Stockholders' Equity

3 Months Ended

Mar. 31, 2023

Equity [Abstract]

Stockholders' Equity

Stockholders’ Equity

Preferred Stock

As of March 31, 2023 and December 31, 2022, the Company had 10,000,000 shares of preferred stock, par value $0.0001 authorized and no shares issued and outstanding.

Common Stock

As of March 31, 2023 and December 31, 2022, the Company had authorized 200,000,000 shares of common stock, par value $0.0001. As of March 31, 2023 and December 31, 2022, the Company had 8,371,462 shares and 4,965,901 shares issued and outstanding, respectively.

The holders of shares of the Company’s common stock are entitled to one vote per share on all matters to be voted upon by the Company’s stockholders and there are no cumulative rights. Subject to preferences that may be applicable to any outstanding preferred stock, the holders of shares of the Company’s common stock are entitled to receive ratably any dividends that may be declared from time to time by the Board of Directors (the “Board”) out of funds legally available for that purpose. In the event of the Company’s liquidation, dissolution or winding up, the holders of shares of the Company’s common stock are entitled to share ratably in all assets remaining after payment of liabilities, subject to prior distribution rights of preferred stock then outstanding. The Company’s common stock has no preemptive or conversion rights or other subscription rights. There are no redemption or sinking fund provisions applicable to the Company’s common stock. The outstanding shares of the Company’s common stock are fully paid and non-assessable.

September 2022 PIPE (Private Investment in Public Equity)

Securities Purchase Agreement

On September 26, 2022, the Company entered into a securities purchase agreement (the “September 2022 Securities Purchase Agreement”) with CBI USA, Inc. (“CBI USA”), pursuant to which the Company agreed to issue and sell to CBI USA in a private placement an aggregate of 3,400,000 shares (the “September 2022 PIPE Shares”) of its common stock, par value $0.0001 per share (the “Common Stock”), at a purchase price of $1.60 per share (the “September 2022 PIPE”).

The September 2022 PIPE closed on February 24, 2023. As a result of the closing of the September 2022 PIPE, CBI USA is the beneficial owner of approximately 50.4% of the Company’s outstanding shares. Pursuant to the board designation rights of CBI USA, CBI USA designated three members to the Company’s board of directors.

In February 2023, the Company received gross proceeds of $5,440 from the September 2022 PIPE (or net proceeds of $4,597 after transaction expenses).

September 2022 Registration Rights Agreement

In connection with the September 2022 PIPE, on September 26, 2022, the Company entered into a registration rights agreement (the “September 2022 Registration Rights Agreement”) with CBI USA, pursuant to which the Company agreed to register the resale of the September 2022 PIPE Shares. Under the September 2022 Registration Rights Agreement, the Company has agreed to file a registration statement covering the resale of the September 2022 PIPE Shares no later than the sixtieth (60th) day following the September 2022 PIPE Closing Date. The Company has agreed to use reasonable best efforts to cause such registration statement to become effective as promptly as practicable after the filing thereof but in any event on or prior to the Effectiveness Deadline (as defined in the September 2022 Registration Rights Agreement), and to keep such registration statement continuously effective until the earlier of (i) the date the September 2022 PIPE Shares covered by such registration statement have been sold or may be resold pursuant to Rule 144 without restriction, or (ii) the date that is two (2) years following the September 2022 PIPE Closing Date. The Company has also agreed, among other things, to pay all reasonable fees and expenses (excluding any underwriters’ discounts and commissions and all fees and expenses of legal counsel, accountants and other advisors for CBI USA except as specifically provided in the September 2022 Registration Rights Agreement) incident to the performance of or compliance with the September 2022 Registration Rights Agreement by the Company.

In the event the registration statement has not been filed within 90 days following the September 2022 PIPE Closing Date, subject to certain limited exceptions, then the Company has agreed to make pro rata payments to CBI USA as liquidated damages in an amount equal to 0.5% of the aggregate amount invested by CBI USA in the September 2022 PIPE Shares per 30-day period or pro rata for any portion thereof for each such month during which such event continues, subject to certain caps set forth in the September 2022 Registration Rights Agreement.

The Company has granted CBI USA customary indemnification rights in connection with the registration statement. CBI USA has also granted the Company customary indemnification rights in connection with the registration statement.

May 2022 PIPE

Securities Purchase Agreement

On May 9, 2022, the Company entered into a securities purchase agreement (the “May 2022 Securities Purchase Agreement”) with certain accredited investors (the “Investors”), pursuant to which the Company agreed to issue and sell to the Investors in a private placement an aggregate of 867,369 shares (the “May 2022 PIPE Shares”) of the Company’s Common Stock, par value $0.0001 per share, at a purchase price of $5.81 per share (the “May 2022 PIPE”). The May 2022 PIPE closed on May 18, 2022 (the “May 2022 PIPE Closing Date”). The Company received aggregate net proceeds from the May 2022 PIPE of approximately $4,886 after deducting transaction-related expenses.

Pursuant to the May 2022 Securities Purchase Agreement, in connection with the May 2022 PIPE, CBI USA will have the right to nominate a member to the Board, subject to the approval by the Board and provided such nominee qualifies as an “independent” director under Nasdaq Listing Rule 5605(a)(2), effective as of the May 2022 PIPE Closing Date. CBI USA will also have the right, effective as of the May 2022 PIPE Closing Date, to designate one individual to attend all meetings of the Board in a non-voting observer capacity.

Registration Rights Agreement

Also, on May 9, 2022, the Company entered into a registration rights agreement (the “May 2022 Registration Rights Agreement”) with the Investors, pursuant to which the Company agreed to register the resale of the May 2022 PIPE Shares. Under the May 2022 Registration Rights Agreement, the Company agreed to file a registration statement covering the resale of the Shares no later than July 18, 2022. On July 11, 2022, the Company filed a registration statement on Form S-3 with the SEC for the resale of the Shares and caused the registration statement to become effective on July 20, 2022.

The Company has granted the Investors customary indemnification rights in connection with the registration statement. The Investors have also granted the Company customary indemnification rights in connection with the registration statement.

Registered Direct Offering

On December 16, 2021, the Company completed a securities purchase agreement (the “Purchase Agreement”) with certain institutional purchasers (the “Purchasers”) entered into on December 14, 2021, pursuant to which the Company offered to the Purchasers, in a registered direct offering priced at-the-market consistent with the rules of Nasdaq (the “Registered Direct Offering”), (i) an aggregate of 433,553 shares (the “Shares”) of the Company’s common stock, $0.0001 par value per share, (ii) pre-funded warrants to purchase up to an aggregate of 718,981 shares of Common Stock (the “Pre-Funded Warrants”), and (iii) warrants to purchase up to 576,261 shares of Common Stock (the “Warrants”). The combined purchase price of each share of Common Stock and accompanying Warrant is $9.9780 per share. The combined purchase price of each Pre-Funded Warrant and accompanying Warrant is $9.9480 (equal to the combined purchase price per share of Common Stock and accompanying Warrant, minus $0.03). The per share exercise price for the Warrants is $8.1031, the closing bid price of the Company’s Common Stock on December 13, 2021 (and as adjusted for the reverse stock split referenced in Note 1). The Warrants will be exercisable immediately from the closing December 16, 2021, and will expire on the five-year anniversary of the date of issuance, or December 16, 2026. The Pre-Funded Warrants and Warrants, which met equity classification, were recognized as a component of permanent stockholders’ equity within additional paid-in-capital together with the net proceeds from the Registered Direct Offering. The gross proceeds to the Company from the Registered Direct Offering (excluding effect of subsequent exercises of pre-funded warrants) were $11,478 and net proceeds after deducting the placement agent’s fees and other offering expenses paid or payable by the Company were $10,226. The securities were offered by the Company pursuant to an effective shelf registration statement on Form S-3 (File No. 333-251555) previously filed with the Securities and Exchange Commission (the “SEC”) on December 21, 2020, and which was declared effective by the SEC on January 7, 2021 (the “Registration Statement”).

Each Warrant is exercisable for one share of Common Stock at an exercise price of $8.1031 per share. The Warrants are immediately exercisable as of the date of issuance of December 16, 2021 and will expire on the five-year anniversary of the date of issuance, or December 16, 2026. The Pre-Funded Warrants were offered in lieu of shares of Common Stock to one of the Purchasers whose purchase of shares of Common Stock in the Registered Direct Offering would otherwise result in said Purchaser, together with its affiliates and certain related parties, beneficially owning more than 4.99% (or, at the election of the Purchaser, 9.99%) of the Company’s outstanding Common Stock immediately following the consummation of the Registered Direct Offering. Each Pre-Funded Warrant is exercisable for one share of Common Stock at an exercise price of $0.030 per share. The Pre-Funded Warrants are immediately exercisable and may be exercised at any time until all of the Pre-Funded Warrants are exercised in full.

A holder (together with its affiliates) of the Warrant or Pre-Funded Warrant may not exercise any portion of the Warrant or Pre-Funded Warrant, as applicable, to the extent that the holder would own more than 4.99% (or, at the holder’s option upon issuance, 9.99%) of the Company’s outstanding Common Stock immediately after exercise, as such percentage ownership is determined in accordance with the terms of the Warrant or Pre-Funded Warrant, as applicable. In lieu of making the cash payment otherwise contemplated to be made to the Company upon exercise of a Warrant in payment of the aggregate exercise price, the holder may elect instead to receive upon such exercise (either in whole or in part) the net number of shares of Common Stock determined according to a formula set forth in the Warrants, provided that such cashless exercise shall only be permitted if the Registration Statement is not effective at the time of such exercise or if the prospectus to which the Registration Statement is a part is not available for the issuance of shares of Common Stock to the Warrant holder.

In lieu of making the cash payment otherwise contemplated to be made to the Company upon exercise of a Pre-Funded Warrant in payment of the aggregate exercise price, the holder may elect instead to receive upon such exercise (either in whole or in part) the net number of shares of Common Stock determined according to a formula set forth in the Pre-Funded Warrants.

Common Stock Warrants

In January 2022, Pre-Funded Warrants were exercised for a total exercise price of $14, resulting in the issuance of 466,666 shares of common stock. As of March 31, 2023, there are no unexercised pre-funded warrants that are outstanding.

As of March 31, 2023, warrants to purchase 576,261 shares of common stock at a price of $8.1031 per share that were acquired in the December 2021 registered-direct offering transaction remain outstanding. The warrants are classified as equity. As a result of the closing of the September 2022 PIPE, a warrant holder elected to exercise their option within 30 days of the closing of the September 2022 PIPE (February 24, 2023) to receive a cash payout for the outstanding warrants in the amount of the Black-Scholes value of each warrant as prescribed in the warrant agreement. The Company paid $800 to the warrant holder on June 23, 2023.

Accumulated Other Comprehensive Income (Loss)

The following table summarizes the changes in each component of accumulated other comprehensive loss, net of tax, for 2023:

	Unrealized losses on short-term investments
Balance at December 31, 2022	$	—
Other comprehensive loss	—
Net current period other comprehensive income	—
Balance at March 31, 2023	$	—

The following table summarizes the changes in each component of accumulated other comprehensive income (loss), net of tax, for 2022:

	Unrealized gains (losses) on short-term investments
Balance at December 31, 2021	$	(2)
Other comprehensive loss	(3)
Net current period other comprehensive loss	(3)
Balance at March 31, 2022	$	(5)

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Equity-Based Compensation

3 Months Ended

Mar. 31, 2023

Share-Based Payment Arrangement [Abstract]

Equity-Based Compensation

Equity-Based Compensation

2017 Equity Incentive Plan

On September 22, 2017, the Company’s stockholders approved the Exicure, Inc. 2017 Equity Incentive Plan (the “2017 Plan”), which became effective on November 15, 2017. The 2017 Plan provides for the issuance of incentive awards of up to 194,750 shares of Exicure common stock, which includes 72,330 shares of Exicure common stock to be issued to officers, employees, consultants and directors, plus a number of shares not to exceed 122,793 that are subject to issued and outstanding awards under the Exicure OpCo 2015 Equity Incentive Plan (the “2015 Plan”) and were assumed in the merger transaction on September 26, 2017. Awards that may be awarded under the 2017 Equity Incentive Plan include non-qualified and incentive stock options, stock appreciation rights, bonus shares, restricted stock, restricted stock units, performance units and cash-based awards. The number of shares of common stock reserved for issuance under the 2017 Equity Incentive Plan automatically increases on January 1 of each year, beginning on January 1, 2020, by the lesser of (i) 153,333 shares, (ii) 5% of the total number of shares of its capital stock outstanding on December 31 of the preceding calendar year, or (iii) a lesser number of shares determined by the Compensation Committee of the Board (the “Compensation Committee”). No future awards will be made under the 2015 Plan upon the effectiveness of the 2017 Plan. On January 1, 2023, pursuant to the terms of the 2017 Plan, the number of awards that are reserved and may be awarded under the 2017 Plan was automatically increased by 153,333 awards.         

As of March 31, 2023, the aggregate number of equity awards available for grant under the 2017 Equity Incentive Plan was 439,075.

Awards granted under the 2017 Plan are contingent on the participants’ continued employment or provision of non-employee services and are subject to forfeiture if employment or continued service terminates for any reason. The initial award granted to an employee or consultant generally vests 25% on the first 12-month anniversary of the grant date and vests 1/48th monthly thereafter until fully vested at the end of 48 months. Subsequent awards granted to employees or consultants generally vest 1/48th monthly until fully vested at the end of 48 months. The initial stock option grant to a non-employee director vests 1/36th monthly until fully vested at the end of 36 months. Subsequent stock option grants to a non-employee director vests 1/12th monthly until fully vested at the end of 12 months. The term of common stock option grants is 10 years unless terminated earlier as described above.

Employee Stock Purchase Plan

The 2017 Employee Stock Purchase Plan (the “ESPP”) was adopted by the Board in September 2017 and approved by the Company’s stockholders in September 2017. Through the ESPP, eligible employees may authorize payroll deductions of up to 15% of their compensation to purchase common stock. The maximum number of shares that an employee may purchase on any exercise date in an offer period will be the smaller of (i) 250 shares or (ii) such number of shares as has a fair market value (determined as of the offering date for such offer period) equal to $25,000 within one calendar year minus the fair market value of any other shares of common stock that are attributed to such calendar year. The purchase price per share at each purchase date is equal to 85% of the lower of (i) the closing market price per share of Exicure common stock on the employee’s offering date or (ii) the closing market price per share of Exicure common stock on the exercise date.

The ESPP provides that the number of shares reserved and available for issuance will automatically increase each January 1, beginning on January 1, 2018 and each January 1 thereafter through January 1, 2027, by the least of (i) 10,000 shares; (ii) 0.3% of the outstanding shares of common stock on the last day of the immediately preceding calendar year; or (iii) a lesser number of shares determined by the Board. On January 1, 2023, the number of shares of common stock available for issuance under the ESPP increased by 10,000 shares. As of March 31, 2023, there were 51,971 shares available for issuance under the ESPP.

Equity-based compensation expense is classified in the statements of operations as follows:

	Three Months Ended March 31,
	2023		2022
Research and development expense	$	154	$	160
General and administrative expense	154		182
	$	308	$	342

Unamortized equity-based compensation expense at March 31, 2023 was $1,415, which is expected to be amortized over a weighted-average period of 2.6 years.

The Company utilizes the Black-Scholes option-pricing model to determine the fair value of common stock option grants. The Black-Scholes option-pricing model was developed for use in estimating the fair value of traded options that have no vesting restrictions and are fully transferable. The model also requires the input of highly subjective assumptions. The following table presents the assumptions used in the Black-Scholes option-pricing model for stock options granted during the three months ended March 31, 2023; there were no stock options granted during the three months ended March 31, 2022:

	Three Months Ended March 31,
	2023
Expected term	5.8 to 5.8 years
Risk-free interest rate	3.83% to 3.83%; weighted avg. 3.83%
Expected volatility	101.0% to 101.0%; weighted avg. 101.0%
Forfeiture rate	5	%
Expected dividend yield	—	%

The expected term is based upon the “simplified method” as described in Staff Accounting Bulletin Topic 14.D.2. Currently, the Company does not have sufficient experience to provide a reasonable estimate of an expected term of its common stock options. The Company will continue to use the “simplified method” until there is sufficient experience to provide a more reasonable estimate in conformance with ASC 718-10-30-25 through 30-26. The risk-free interest rate assumptions were based on the U.S. Treasury bond rate appropriate for the expected term in effect at the time of grant. For stock options granted after December 31, 2021, the expected volatility is based on the volatility of shares of the Company. For stock options granted prior to January 1, 2022, the expected volatility is based on calculated enterprise value volatilities for publicly traded companies in the same industry and general stage of development. The estimated forfeiture rates were based on historical experience for similar classes of employees. The dividend yield was based on expected dividends at the time of grant.

The fair value of the underlying common stock and the exercise price for the common stock options granted during the three months ended March 31, 2023 are summarized in the table below. There were no stock options granted during the three months ended March 31, 2022.

Common Stock Options Granted During Period Ended:	Fair Value of Underlying Common Stock	Exercise Price of Common Stock Option
Three months ended March 31, 2023	$1.58; weighted avg. $1.58	$1.58; weighted avg. $1.58

The weighted-average grant date fair value of common stock options granted in the three months ended March 31, 2023 was $1.26 per common stock option.

A summary of common stock option activity as of the periods indicated is as follows:

	Options	Weighted-Average Exercise Price (1)		Weighted-Average Remaining Contractual Term (years)	Aggregate Intrinsic Value (thousands)
Outstanding - December 31, 2022	222,833	$	4.74	7.5	$	—
Granted	10,000	1.58
Exercised	—	—
Forfeited	(29,427)	5.55
Outstanding - March 31, 2023	203,406	$	4.46	6.7	$	—
Exercisable - March 31, 2023	84,469	$	5.40	3.5	$	—
Vested and Expected to Vest - March 31, 2023	196,229	$	4.49	6.6	$	—

(1) On March 24, 2022, the Company’s Board of Directors unanimously approved the repricing of all outstanding and unexercised stock options granted under our 2015 Equity Incentive Plan and 2017 Equity Incentive Plan and held by its current employees, executive officers, and directors. Effective April 1, 2022, the exercise price of the eligible stock options was reduced to $5.51, the closing price of our common stock on April 1, 2022. See below section titled “Repricing of Outstanding and Unexercised Options” for more information.

A summary of restricted stock unit activity of the periods indicated is as follows:

	Restricted Stock Units	Weighted-Average Grant Date Fair Value
Unvested balance - December 31, 2022	20,885	$	12.65
Granted	—	—
Settled	(8,493)	14.24
Forfeited	(3,608)	14.58
Unvested balance - March 31, 2023	8,784	$	4.02

The grant date fair value of restricted stock units is based on the Company’s closing stock price at the date of grant. At vesting, each outstanding restricted stock unit will be exchanged for one share of the Company’s common stock. Restricted stock units generally vest evenly on a quarterly basis over a period of 4 years in exchange for continued service provided by the restricted stock unit recipient during that vesting period.

A summary of performance-based restricted stock unit activity of the periods indicated is as follows:

	Performance-Based Restricted Stock Units	Weighted-Average Grant Date Fair Value
Unvested balance - December 31, 2022	97,643	$	3.45
Granted	—	—
Unvested balance - March 31, 2023	97,643	$	3.45

The grant date fair value of performance-based restricted stock units is based on the Company’s closing stock price at the date of grant. At vesting, each outstanding restricted stock unit will be exchanged for one share of the Company’s common stock. Certain performance metrics must be met by the performance measurement date in 2023 in order for the performance-based restricted stock units granted during 2022 to vest as follows: one-third on May 16, 2023, one-third on May 16, 2024, and one-third on May 16, 2025, in exchange for continued service provided by the performance-based restricted stock unit recipient during that vesting period.

Repricing of Outstanding and Unexercised Options

On March 24, 2022, the Board unanimously approved the repricing of all outstanding and unexercised stock options granted under the 2015 Plan and 2017 Plan (the “Plans”) and held by current employees, executive officers, and directors of the Company (the “Eligible Stock Options”). Effective April 1, 2022, the exercise price of the eligible stock options was reduced to $5.51, the closing price of its common stock on April 1, 2022. Except for the modification to the exercise price of the Eligible Stock Options, all other terms and conditions of each of the Eligible Stock Options will remain in full force and effect.

Pursuant to the Plans, the Board, as the administrator of the Plans, has discretionary authority, exercisable on such terms and conditions that it deems appropriate under the circumstances, to reduce the exercise price in effect for outstanding options under the Plans. In approving the repricing, the Board considered the impact of the current exercise prices of outstanding stock options on the incentives provided to employees and directors, the lack of retention value provided by the outstanding stock options to employees and directors, and the impact of such options on the capital structure of the Company. As of March 24, 2022, there were 233,224 stock options outstanding under the Plans, and all of the Company’s outstanding stock options had exercise prices in excess of the current fair market value of the Company’s common stock as of March 24, 2022, which is why the Board made the determination to deem all outstanding and unexercised stock options held by current employees, executive officers, and directors as Eligible Stock Options.

Matthias Schroff, the Company’s former Chief Executive Officer, and Elias Papadimas, the Company’s former Chief Financial Officer, hold Eligible Stock Options exercisable into an aggregate of 29,373 and 12,513 shares of the Company’s common stock, respectively. Former non-employee directors, Jeffrey Cleland, Elizabeth Garofalo, Bali Muralidhar and James Sulat, hold Eligible Stock Options exercisable into an aggregate of 3,835, 5,000, 3,835 and 3,112 shares of the Company’s common stock, respectively.

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Income Taxes

3 Months Ended

Mar. 31, 2023

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The Company incurred a pretax loss in each of the three ended March 31, 2023 and 2022, which consists entirely of loss in the United States and resulted in no provision for income tax expense during the periods then

ended. The effective tax rate is 0% in each of the three ended March 31, 2023 and 2022 because the Company has generated tax losses and has provided a full valuation allowance against its deferred tax assets.

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Loss Per Common Share

3 Months Ended

Mar. 31, 2023

Earnings Per Share [Abstract]

Loss Per Common Share

Loss Per Common Share

Basic loss per common share is calculated by dividing net loss by the weighted-average number of shares of common stock outstanding during the period. Diluted loss per common share is calculated using the treasury share method by giving effect to all potentially dilutive securities that were outstanding. Potentially dilutive options, restricted stock units and warrants to purchase common stock that were outstanding during the periods presented were excluded from the diluted loss per share calculation for the periods presented because such shares had an anti-dilutive effect due to the net loss reported in those periods. Therefore, basic and diluted loss per common share is the same for each of the three months ended March 31, 2023 and 2022.

The following is the computation of loss per common share for the three months ended March 31, 2023 and 2022:

	Three Months Ended March 31,
	2023		2022
Net loss	$	(4,407)	$	(8,348)
Weighted-average basic and diluted common shares outstanding	6,288,952		4,031,316
Loss per share - basic and diluted	$	(0.70)	$	(2.07)

The outstanding securities presented below were excluded from the calculation of loss per common share, for the periods presented, because such securities would have been anti-dilutive due to the Company’s loss per share during that period:

	As of March 31,
	2023	2022
Options to purchase common stock	203,406	232,271
Restricted stock units	8,784	9,612
Performance stock units	97,643	—
Warrants to purchase common stock	576,261	576,261

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Fair Value Measurements

3 Months Ended

Mar. 31, 2023

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

ASC Topic 820, Fair Value Measurement, establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value, as follows: Level 1 Inputs - unadjusted quoted prices in active markets for identical assets or liabilities accessible to the reporting entity at the measurement date; Level 2 Inputs - other than quoted prices included in Level 1 inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the asset or liability; and Level 3 Inputs - unobservable inputs for the asset or liability used to measure fair value to the extent that observable inputs are not available, thereby allowing for situations in which there is little, if any, market activity for the asset or liability at measurement date.

Assets measured at fair value on a recurring basis as of March 31, 2023 are as follows:

	Total		Level 1		Level 2		Level 3
Assets
Cash equivalents:
Money market funds	$	1,629	$	1,629	$	—	$	—
Total financial assets	$	1,629	$	1,629	$	—	$	—

Assets measured at fair value on a recurring basis as of December 31, 2022 are as follows:

	Total		Level 1		Level 2		Level 3
Assets
Cash equivalents:
Money market funds	$	1,612	$	1,612	$	—	$	—
Total financial assets	$	1,612	$	1,612	$	—	$	—

Liabilities measured at fair value on a recurring basis as of March 31, 2023 are as follows:

	Total		Level 1		Level 2		Level 3
Liabilities
Common stock warrant liability:
Warranty liability	$	800	$	—	$	—	$	800
Total financial liability	$	800	$	—	$	—	$	800

The Company uses the market approach and Level 1 and Level 2 inputs to value its cash equivalents and Level 2 inputs to value its short-term investments. The Company uses the market approach and Level 3 inputs to value its liabilities. There were no liabilities measured at fair value on a recurring basis as of December 31, 2022. The Company’s long-term debt bore interest at the prevailing market rates for instruments with similar characteristics and, accordingly, the carrying value for this instrument also approximates its fair value and the financial measurement is also classified within Level 2 of the fair value hierarchy.

Warrant Liability

Significant inputs related to the Company’s liability classified warrants are listed below. There were no changes from the amounts on the initial measurement date to March 31, 2023.

	March 31, 2023
Expected term	4.22
Volatility	164.63		%
Value of underlying shares	$	1.84
Risk free interest rate	1.93		%
Expected dividend yield	—		%

A summary of the warrant liability activity for the three months ended March 31, 2023, is as follows:

	Warrants Outstanding	Fair Value Per Share		Fair Value
(in thousands, except per share data)
Balance at December 31, 2022	—	$	—	$	—
Option to exercise	526	$	1.52	$	800
Balance at March 31, 2023	526	$	1.52	$	800

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Commitment and Contingencies

3 Months Ended

Mar. 31, 2023

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Legal Proceedings

On December 13, 2021, Mark Colwell filed a putative securities class action lawsuit against the Company, David A. Giljohann and Brian C. Bock in the United States District Court for the Northern District of Illinois, captioned Colwell v. Exicure, Inc. et al., Case No. 1:21-cv-0663. On February 4, 2021, plaintiff filed an amended putative securities class action complaint. On March 20, 2023, the court entered an order appointing James Mathew as lead plaintiff and Bleichmar Fonti & Auld LLP as lead counsel in the action pursuant to the Private Securities Litigation Reform Act of 1995. On May 26, 2023, lead plaintiff filed a second amended complaint against the Company, Dr. Giljohann, Mr. Bock, and Grant Corbett. The second amended complaint alleges that Dr. Giljohann, Mr. Bock, and Dr. Corbett made materially false and/or misleading statements related to the Company’s clinical programs purportedly causing losses to investors who acquired Company securities between January 7, 2021 and December 10, 2021. The second amended complaint does not quantify any alleged damages but, in addition to attorneys’ fees and costs, lead plaintiff seeks to recover damages on behalf of himself and others who acquired the Company’s stock during the putative class period at allegedly inflated prices and purportedly suffered financial harm as a result. The Company intends to move to dismiss the complaint.

On March 1, 2022, Kapil Puri filed a shareholder derivative lawsuit on behalf of the Company in the United States District Court for the Northern District of Illinois, against Dr. Giljohann and Mr. Bock, Jeffrey L. Cleland, Elizabeth Garofalo, Bosun Hau, Bali Muralidhar, Andrew Sassine, Matthias Schroff, James Sulat and Timothy Walbert, captioned Puri v. Giljohann, et al., Case No. 1:22-cv-01083. On March 8, 2022, Yixin Sim filed a similar shareholder derivative lawsuit in the same court against the same individuals, captioned Sim v. Giljohann, et al., Case No. 1:22-cv-01217. On April 25, 2022, Stourbridge Investments LLC filed a similar shareholder derivative lawsuit against the same individuals in the United States District Court for the District of Delaware, captioned Stourbridge Investments LLC v. Exicure, Inc. et al., Case No. 1:22-cv-00526. Based on similar factual allegations presented in the Colwell complaint, described above, the Puri, Sim, and Stourbridge complaints (collectively, the “Derivative Complaints”) allege that the defendants caused the Company to issue false and/or misleading statements in the proxy statement for its 2021 Annual Meeting of Stockholders regarding risk oversight, code of conduct, clinical program and compensation matters, among other things, in violation of federal securities law, and committed breaches of fiduciary duties. The Derivative Complaints also assert that Dr. Giljohann and Mr. Bock are liable for contribution under the federal securities laws. The Puri and Stourbridge complaints further assert state law claims for unjust enrichment, and the Puri complaint additionally asserts state law claims for abuse of control, gross mismanagement and corporate waste. The plaintiffs do not quantify any alleged damages in the Derivative Complaints, but seek restitution for damages to the Company, attorneys’ fees, costs, and expenses, as well as an order directing that certain proposals for strengthening board oversight be put to a vote of the Company’s shareholders.

On March 18, 2022, James McNabb, through counsel, sent a written demand to the Company (the “Demand Letter”) demanding that the Board of Directors investigate certain allegations and commence proceedings on the Company’s behalf against certain of the Company’s current officers and directors for alleged breaches of fiduciary duties and corporate waste. All of the Derivative Cases have been stayed pending a decision on any motion to dismiss that may be filed in the Puri case. In addition, the Stourbridge case has been administratively closed pending

the decision on motion to dismiss that may be filed in the Puri case. Further, pursuant to agreement, the Demand Letter is being held in abeyance and any related statute of limitations tolled pending such motion and decision.

In June 2023, a director of the Company designated by CBI USA served a demand on the Company to access certain books and records pursuant to Section 220(d) of the Delaware General Corporation Law. The Company served its response and is working with the director to resolve this demand amicably and in accordance with the Company’s obligations under Delaware law.

Northwestern University License Agreements

On December 12, 2011, (1) AuraSense, LLC, the Company’s former parent, assigned to the Company all of its worldwide rights and interests under AuraSense, LLC’s 2009 license agreement with Northwestern University (“NU”) in the field of the use of nanoparticles, nanotechnology, microtechnology or nanomaterial-based constructs as therapeutics or accompanying therapeutics as a means of delivery, but expressly excluding diagnostics (the “assigned field”); (2) in accordance with the terms and conditions of this assignment, the Company assumed all liabilities and obligations of AuraSense, LLC as set forth in its license agreement in the assigned field; and (3) in order to secure this assignment and the patent rights from NU, the Company agreed (i) to pay NU an annual license fee, which may be credited against any royalties due to NU in the same year, (ii) to reimburse NU for expenses associated with the prosecution and maintenance of the license patent rights, (iii) to pay NU royalties based on any net revenue generated by the Company’s sale or transfer of any licensed product, (iv) to pay NU, in the event the Company grants a sublicense under the licensed patent rights, the greater of a percentage of all sublicensee royalties or a percentage of any net revenue generated by a sublicensee’s sale or transfer of any licensed product, and (v) to pay NU a percentage of all other sublicense payments received by the Company. In August 2015, the Company entered into a restated license agreement with NU (the “Restated License Agreement”). In February 2016, the Company obtained exclusive license as to NU’s rights in certain SNA technology it jointly owns with NU (the “Co-owned Technology License”). The Company’s license to NU’s rights is limited to the assigned field, however the Company has no such limitation as to its own rights in this jointly owned technology. The Company’s rights and obligations in the Co-owned Technology License agreement is substantially the same as in the Restated License Agreement from August 2015 (collectively referred to as “the Northwestern University License Agreements”). As of March 31, 2023, the Company has paid to NU an aggregate of $11,540 in consideration of each of the obligations described above.

Leases

Refer to Note 5, Leases, for a discussion of the commitments associated with the Company’s lease agreements.

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Related-Party Transactions	3 Months Ended
	Mar. 31, 2023
Related Party Transactions [Abstract]
Related-Party Transactions	Related-Party TransactionsPursuant to a Consulting Agreement, effective as of September 25, 2022, between the Company and Alta Companies LTD (“Alta”), the Company paid Alta $218 on February 27, 2023 for a consulting fee earned as a result of the September 2022 PIPE closing. Paul Kang, a director of the Company since February 2023, is the President of Alta.

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Subsequent Events

3 Months Ended

Mar. 31, 2023

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

Sublease of Office Space

The Company entered into a sublease agreement with Cyclopure, Inc. (the “Subtenant”) to sublease approximately 57% of its office space pursuant to that certain sublease agreement (the “Sublease Agreement”), dated as of May 4, 2023. The term of the Sublease Agreement began on May 15, 2023 and ends on June 30, 2030, the expiration date of the Chicago Lease. The first three months under the Sublease Agreement are rent free. Beginning August 15, 2023, the Company will charge the Subtenant for 57% of the base rent under the Chicago Lease, and the subtenant is responsible for its pro rata share of operating expenses and taxes payable.

Purchase of Convertible Bonds

On May 3, 2023, the Company entered into a subscription agreement (the “Subscription Agreement”) with Cyworld Z Co., Ltd., (“Cyworld Z”). Pursuant to the Subscription Agreement, the Company purchased non-guaranteed private placement convertible bonds (the “Bonds”) of Cyworld Z for a subscription amount of $1 million. The Bonds mature on May 2, 2026 and the yield to maturity is 4.5% per annum. The Company will also have the put option to request Cyworld Z to redeem part or the entire principal amount of the Bonds on the first anniversary after the issue date and every three months thereafter before the maturity date. The conversion ratio will be one hundred percent (100%) of the Bond’s face value.

On May 16, 2023, the Company entered into a second subscription agreement (“Second Subscription Agreement”) with Cyworld Z. Pursuant to the Second Subscription Agreement, the Company purchased non-guaranteed private placement convertible bonds (the “Bonds”) of Cyworld Z for a subscription amount for an additional $1 million. The Bonds mature on May 15, 2026 and the yield to maturity is 4.5% per annum. The Company will also have the put option to request Cyworld Z to redeem part or the entire principal amount of the Bonds on the first anniversary after the issue date and every three months thereafter before the maturity date. The conversion ratio will be one hundred percent (100%) of the Bond’s face value.

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Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2023

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements as of March 31, 2023 and December 31, 2022, and for the three months ended March 31, 2023 and 2022, have been presented in conformity with accounting principles generally accepted in the United States of America (“GAAP”).

Principles of Consolidation

Principles of Consolidation

The accompanying unaudited condensed consolidated financial statements include the accounts of Exicure and its wholly owned subsidiary, Exicure Operating Company. All intercompany transactions and accounts are eliminated in consolidation.

Use of Estimates

Use of Estimates

The preparation of the financial statements in conformity with GAAP 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 financial statements and the reported amounts of revenues and expenses during the reporting period. Management bases its estimates on certain assumptions which it believes are reasonable in the circumstances and while actual results could differ from those estimates, management does not believe that any change in those assumptions in the near term would have a significant effect on the Company’s financial position, results of operations or cash flows. Actual results in future periods could differ from those estimates.

Significant estimates include the recording of its warrant liability. The Company calculated its warrant liability based on the Black-Scholes Model, see Note 7, Stockholders’ Equity, for further details.

Recent Accounting Pronouncements Adopted

Recent Accounting Pronouncements Adopted

Financial Instruments - Credit Losses

In June 2016, the FASB issued ASU 2016-13, Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). ASU 2016-13 is a new standard intended to improve reporting requirements specific to loans, receivables and other financial instruments. ASU 2016-13 requires that credit losses on financial assets measured at amortized cost be determined using an expected loss model, instead of the current incurred loss model, and requires that credit losses related to available-for-sale debt securities be recorded through an allowance for credit losses and limited to the amount by which carrying value exceeds fair value. ASU 2016-13 also requires enhanced disclosure of credit risk associated with financial assets. The effective date of ASU 2016-13 was deferred by ASU 2019-10, Financial Instruments—Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842)—Effective Dates to the annual period beginning after December 15, 2022 for companies that (i) meet the definition of an SEC filer and (ii) are eligible as “smaller reporting companies” as such term is defined by the SEC, with early adoption permitted. The Company adopted this ASU in January 2023, there was no material impact on the consolidated financial statements.

Loss Per Common Share

Basic loss per common share is calculated by dividing net loss by the weighted-average number of shares of common stock outstanding during the period. Diluted loss per common share is calculated using the treasury share method by giving effect to all potentially dilutive securities that were outstanding. Potentially dilutive options, restricted stock units and warrants to purchase common stock that were outstanding during the periods presented were excluded from the diluted loss per share calculation for the periods presented because such shares had an anti-dilutive effect due to the net loss reported in those periods.

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Description of Business, Basis of Presentation, Going Concern and Restatement of Financial Statement (Tables)

3 Months Ended

Mar. 31, 2023

Accounting Policies [Abstract]

Schedule of Error Correction

The following table illustrates the effects of the error corrections to operating expenses:

	Previously Reported		Adjustments		Restated
Research and development expense	$	1,981	$	(558)	$	1,423
General and administrative expense	2,558		558		3,116
Total operating expenses	$	4,539	$	—	$	4,539

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Supplemental Balance Sheet Information (Tables)

3 Months Ended

Mar. 31, 2023

Supplemental Balance Sheet Information [Abstract]

Schedule of Prepaid and Other Current Assets

Prepaid expenses and other current assets

	March 31, 2023		December 31, 2022
Prepaid clinical, contract research and manufacturing costs	$	51	$	213
Prepaid insurance	750		408
Other	516		853
Prepaid expenses and other current assets	$	1,317	$	1,474

Schedule of Other Noncurrent Assets

Other noncurrent assets

	March 31, 2023		December 31, 2022
Restricted cash	$	1,200	$	1,200
Prepaid insurance	2,106		2,252
Other	4		38
Other noncurrent assets	$	3,310	$	3,490

Schedule of Property and Equipment, Net

Property and equipment, net

	March 31, 2023		December 31, 2022
Scientific equipment	$	5,932	$	6,087
Computers and software	63		63
Furniture and fixtures	30		30
Property and equipment, gross	6,025		6,180
Less: accumulated depreciation and amortization	(3,746)		(3,650)
Property and equipment, net	$	2,279	$	2,530

Schedule of Accrued Liabilities

Accrued expenses and other current liabilities

	March 31, 2023		December 31, 2022
Accrued clinical, contract research and manufacturing costs	$	10	$	48
Accrued restructuring costs	—		48
Lease liability	561		539
Accrued payroll-related expenses	184		32
Accrued federal and state tax payable	209		209
Accrued other expenses	513		402
Accrued expenses and other current liabilities	$	1,477	$	1,278

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Leases (Tables)

3 Months Ended

Mar. 31, 2023

Leases [Abstract]

Schedule of Lease Costs

The following table summarizes lease costs in the Company’s unaudited condensed consolidated statement of operations:

	Three Months Ended March 31,
	2023		2022
Operating lease costs	$	326	$	326
Variable lease costs	332		341
Short term lease costs	—		13
Total lease costs	$	658	$	680

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Restructuring (Tables)

3 Months Ended

Mar. 31, 2023

Restructuring and Related Activities [Abstract]

Schedule of Restructuring and Related Costs

The following table presents changes in the accrued restructuring liability balance for the period presented (in thousands):

	December 2021 Restructuring
Balance at December 31, 2022	$	48
Payments	(48)
Balance at March 31, 2023	$	—

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Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2023

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

The following table summarizes the changes in each component of accumulated other comprehensive loss, net of tax, for 2023:

	Unrealized losses on short-term investments
Balance at December 31, 2022	$	—
Other comprehensive loss	—
Net current period other comprehensive income	—
Balance at March 31, 2023	$	—

The following table summarizes the changes in each component of accumulated other comprehensive income (loss), net of tax, for 2022:

	Unrealized gains (losses) on short-term investments
Balance at December 31, 2021	$	(2)
Other comprehensive loss	(3)
Net current period other comprehensive loss	(3)
Balance at March 31, 2022	$	(5)

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Equity-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2023

Share-Based Payment Arrangement [Abstract]

Schedule of Equity-Based Compensation Expense Classification in Statement of Operations

Equity-based compensation expense is classified in the statements of operations as follows:

	Three Months Ended March 31,
	2023		2022
Research and development expense	$	154	$	160
General and administrative expense	154		182
	$	308	$	342

Schedule of Assumptions Used to Determine Fair Value of Common Stock Option Grants

The following table presents the assumptions used in the Black-Scholes option-pricing model for stock options granted during the three months ended March 31, 2023; there were no stock options granted during the three months ended March 31, 2022:

	Three Months Ended March 31,
	2023
Expected term	5.8 to 5.8 years
Risk-free interest rate	3.83% to 3.83%; weighted avg. 3.83%
Expected volatility	101.0% to 101.0%; weighted avg. 101.0%
Forfeiture rate	5	%
Expected dividend yield	—	%

The fair value of the underlying common stock and the exercise price for the common stock options granted during the three months ended March 31, 2023 are summarized in the table below. There were no stock options granted during the three months ended March 31, 2022.

Common Stock Options Granted During Period Ended:	Fair Value of Underlying Common Stock	Exercise Price of Common Stock Option
Three months ended March 31, 2023	$1.58; weighted avg. $1.58	$1.58; weighted avg. $1.58

Schedule of Common Stock Option Activity

A summary of common stock option activity as of the periods indicated is as follows:

	Options	Weighted-Average Exercise Price (1)		Weighted-Average Remaining Contractual Term (years)	Aggregate Intrinsic Value (thousands)
Outstanding - December 31, 2022	222,833	$	4.74	7.5	$	—
Granted	10,000	1.58
Exercised	—	—
Forfeited	(29,427)	5.55
Outstanding - March 31, 2023	203,406	$	4.46	6.7	$	—
Exercisable - March 31, 2023	84,469	$	5.40	3.5	$	—
Vested and Expected to Vest - March 31, 2023	196,229	$	4.49	6.6	$	—

(1) On March 24, 2022, the Company’s Board of Directors unanimously approved the repricing of all outstanding and unexercised stock options granted under our 2015 Equity Incentive Plan and 2017 Equity Incentive Plan and held by its current employees, executive officers, and directors. Effective April 1, 2022, the exercise price of the eligible stock options was reduced to $5.51, the closing price of our common stock on April 1, 2022. See below section titled “Repricing of Outstanding and Unexercised Options” for more information.

Schedule of Restricted Stock Unit Awards Activity

A summary of restricted stock unit activity of the periods indicated is as follows:

	Restricted Stock Units	Weighted-Average Grant Date Fair Value
Unvested balance - December 31, 2022	20,885	$	12.65
Granted	—	—
Settled	(8,493)	14.24
Forfeited	(3,608)	14.58
Unvested balance - March 31, 2023	8,784	$	4.02

Schedule of Performance-based Restricted Stock Unit Activity

A summary of performance-based restricted stock unit activity of the periods indicated is as follows:

	Performance-Based Restricted Stock Units	Weighted-Average Grant Date Fair Value
Unvested balance - December 31, 2022	97,643	$	3.45
Granted	—	—
Unvested balance - March 31, 2023	97,643	$	3.45

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Loss Per Common Share (Tables)

3 Months Ended

Mar. 31, 2023

Earnings Per Share [Abstract]

Schedule of Computation of loss per common share

The following is the computation of loss per common share for the three months ended March 31, 2023 and 2022:

	Three Months Ended March 31,
	2023		2022
Net loss	$	(4,407)	$	(8,348)
Weighted-average basic and diluted common shares outstanding	6,288,952		4,031,316
Loss per share - basic and diluted	$	(0.70)	$	(2.07)

Schedule of Antidilutive Securities

The outstanding securities presented below were excluded from the calculation of loss per common share, for the periods presented, because such securities would have been anti-dilutive due to the Company’s loss per share during that period:

	As of March 31,
	2023	2022
Options to purchase common stock	203,406	232,271
Restricted stock units	8,784	9,612
Performance stock units	97,643	—
Warrants to purchase common stock	576,261	576,261

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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2023

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

Assets measured at fair value on a recurring basis as of March 31, 2023 are as follows:

	Total		Level 1		Level 2		Level 3
Assets
Cash equivalents:
Money market funds	$	1,629	$	1,629	$	—	$	—
Total financial assets	$	1,629	$	1,629	$	—	$	—

Assets measured at fair value on a recurring basis as of December 31, 2022 are as follows:

	Total		Level 1		Level 2		Level 3
Assets
Cash equivalents:
Money market funds	$	1,612	$	1,612	$	—	$	—
Total financial assets	$	1,612	$	1,612	$	—	$	—

Liabilities measured at fair value on a recurring basis as of March 31, 2023 are as follows:

	Total		Level 1		Level 2		Level 3
Liabilities
Common stock warrant liability:
Warranty liability	$	800	$	—	$	—	$	800
Total financial liability	$	800	$	—	$	—	$	800

Schedule of Assumptions Used to Estimate Fair Value of Warrant Liability

Significant inputs related to the Company’s liability classified warrants are listed below. There were no changes from the amounts on the initial measurement date to March 31, 2023.

	March 31, 2023
Expected term	4.22
Volatility	164.63		%
Value of underlying shares	$	1.84
Risk free interest rate	1.93		%
Expected dividend yield	—		%

Schedule of Warrant Liability Activity

A summary of the warrant liability activity for the three months ended March 31, 2023, is as follows:

	Warrants Outstanding	Fair Value Per Share		Fair Value
(in thousands, except per share data)
Balance at December 31, 2022	—	$	—	$	—
Option to exercise	526	$	1.52	$	800
Balance at March 31, 2023	526	$	1.52	$	800

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Description of Business, Basis of Presentation, Going Concern and Restatement of Financial Statement (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Accounting Policies [Abstract]
Accumulated deficit generated, since inception	$ 195,893
Cash and cash equivalents	$ 9,960	$ 8,577

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Description of Business, Basis of Presentation, Going Concern and Restatement of Financial Statement - Schedule of Error Corrections (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Error Corrections and Prior Period Adjustments
Research and development expense	$ 1,423	$ 7,140
General and administrative expense	3,116	3,162
Total operating expenses	4,539	$ 10,302
Previously Reported
Error Corrections and Prior Period Adjustments
Research and development expense	1,981
General and administrative expense	2,558
Total operating expenses	4,539
Adjustments
Error Corrections and Prior Period Adjustments
Research and development expense	(558)
General and administrative expense	558
Total operating expenses	$ 0

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Supplemental Balance Sheet Information - Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Supplemental Balance Sheet Information [Abstract]
Prepaid clinical, contract research and manufacturing costs	$ 51	$ 213
Prepaid insurance	750	408
Other	516	853
Prepaid expenses and other assets	$ 1,317	$ 1,474

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Supplemental Balance Sheet Information - Other Noncurrent Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Supplemental Balance Sheet Information [Abstract]
Restricted cash	$ 1,200	$ 1,200
Prepaid insurance	2,106	2,252
Other	4	38
Other noncurrent assets	$ 3,310	$ 3,490

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Supplemental Balance Sheet Information - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 6,025	$ 6,180
Less: accumulated depreciation and amortization	(3,746)	(3,650)
Property and equipment, net	2,279	2,530
Scientific equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	5,932	6,087
Computers and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	63	63
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 30	$ 30

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Supplemental Balance Sheet Information - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 251	$ 302
Scientific equipment
Property, Plant and Equipment [Line Items]
Sale of scientific equipment	7
Gain on disposition of property plant equipment	$ 99

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Supplemental Balance Sheet Information - Accrued Expense and Other Current Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Supplemental Balance Sheet Information [Abstract]
Accrued clinical, contract research and manufacturing costs	$ 10	$ 48
Accrued restructuring costs	0	48
Lease liability	561	539
Accrued payroll-related expenses	184	32
Accrued federal and state tax payable	209	209
Accrued other expenses	513	402
Accrued expenses and other current liabilities	$ 1,477	$ 1,278

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Debt - Narrative (Details) - MidCap Credit Agreement - USD ($) $ in Thousands		3 Months Ended
	Mar. 15, 2022	Mar. 31, 2022
Debt Instrument [Line Items]
Payment for debt extinguishment	$ 506
Interest paid on debt		$ 194
Secured Debt
Debt Instrument [Line Items]
Repayments of debt	$ 7,500

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Leases - Narrative (Details) ft² in Thousands, $ in Thousands		3 Months Ended
	Jul. 01, 2020 USD ($) ft² extension_period	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease, cash payments		$ 646	$ 872
Chicago
Lessee, Lease, Description [Line Items]
Operating lease area | ft²	30
Operating lease, contract term	10 years
Operating lease, number of extensions | extension_period	2
Operating lease, renewal term	5 years
Operating lease, annual rent payment	$ 1,113
Operating lease, base rent annual percentage increase	3.00%
Operating lease, estimated rental payment over lease term	$ 12,761

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Leases - Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Leases [Abstract]
Operating lease costs	$ 326	$ 326
Variable lease costs	332	341
Short term lease costs	0	13
Total lease costs	$ 658	$ 680

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Restructuring - Narrative (Details)	Sep. 26, 2022
September 2022 Restructuring
Restructuring Cost and Reserve [Line Items]
Reduction eliminated, percentage of existing workforce	66.00%

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Restructuring - Accrued Restructuring Liability (Details) - December 2021 Restructuring $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($)
Restructuring Reserve [Roll Forward]
Accrued restructuring liability, beginning balance	$ 48
Payments	(48)
Accrued restructuring liability, ending balance	$ 0

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Stockholders' Equity - Current Capitalization (Details)	Mar. 31, 2023 vote $ / shares shares	Dec. 31, 2022 $ / shares shares
Equity [Abstract]
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.0001	$ 0.0001
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.0001	$ 0.0001
Common stock, shares issued (in shares)	8,371,462	4,965,901
Common stock, shares outstanding (in shares)	8,371,462	4,965,901
Common stock, voting rights for each share | vote	1

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Stockholders' Equity - Securities Purchase Agreement (Details) $ / shares in Units, $ in Thousands					1 Months Ended
	Feb. 24, 2023 member	Sep. 26, 2022 $ / shares shares	May 09, 2022 USD ($) $ / shares shares	Dec. 16, 2021 USD ($) $ / shares shares	Feb. 28, 2023 USD ($)	Mar. 31, 2023 $ / shares	Dec. 31, 2022 $ / shares
Subsidiary, Sale of Stock [Line Items]
Common stock, par value (in dollars per share)						$ 0.0001	$ 0.0001
Number of members designated to board | member	3
Registration rights agreement, required filing term		90 days
Registration rights agreement, liquidation damages payable as a percent of amount invested, if filed late		0.50%
Registration rights agreement, liquidation damages payable if filed late, measurement term		30 days
Exercise price (in dollars per share)						$ 8.1031
Warrant liability, measurement input, term				5 years
Gross proceeds | $				$ 11,478
Net proceeds | $				$ 10,226
Ownership percentage limitation				4.99%
Ownership percentage limitation at election of purchaser				9.99%
Pre-Funded Warrants
Subsidiary, Sale of Stock [Line Items]
Warrants issued in sale of stock (in shares) | shares				718,981
Exercise price (in dollars per share)				$ 0.030
Number of shares exercisable for each warrant (in shares) | shares				1
Warrant
Subsidiary, Sale of Stock [Line Items]
Warrants issued in sale of stock (in shares) | shares				576,261
Exercise price (in dollars per share)				$ 8.1031
Number of shares exercisable for each warrant (in shares) | shares				1
Common Stock And Accompanying Warrant
Subsidiary, Sale of Stock [Line Items]
Purchase price (in dollars per share)				$ 9.9780
Pre-Funded Warrants And Accompanying Warrant
Subsidiary, Sale of Stock [Line Items]
Purchase price (in dollars per share)				$ 9.9480
Common Stock
Subsidiary, Sale of Stock [Line Items]
Number of shares issued in transaction (in shares) | shares				433,553
Common stock, par value (in dollars per share)				$ 0.0001
Private Placement
Subsidiary, Sale of Stock [Line Items]
Number of shares issued in transaction (in shares) | shares		3,400,000	867,369
Common stock, par value (in dollars per share)		$ 0.0001	$ 0.0001
Sales price of shares issued in transaction (in dollars per share)		$ 1.60	$ 5.81
Consideration received, gross | $					$ 5,440
Consideration for stock transaction | $			$ 4,886		$ 4,597
Private Placement | CBI USA, Inc
Subsidiary, Sale of Stock [Line Items]
Percentage of ownership after transaction	50.40%

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Stockholders' Equity - Common Stock Warrants (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	3 Months Ended
	Jun. 23, 2023	Jan. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Dec. 16, 2021
Class of Warrant or Right [Line Items]
Proceeds from warrant exercises			$ 0	$ 14
Number of shares called by warrants (in shares)			576,261
Exercise price (in dollars per share)			$ 8.1031
Subsequent Event
Class of Warrant or Right [Line Items]
Payment for warrant liability	$ 800
Pre-Funded Warrants
Class of Warrant or Right [Line Items]
Proceeds from warrant exercises		$ 14
Shares issued for exercise of warrants (in shares)		466,666
Exercise price (in dollars per share)					$ 0.030

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Stockholders' Equity - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 14,922	$ 11,232
Other comprehensive (loss)	0	(3)
Ending balance	14,619	3,236
Unrealized gains (losses) on short-term investments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	0	(2)
Other comprehensive loss	0	(3)
Other comprehensive (loss)	0	(3)
Ending balance	$ 0	$ (5)

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Equity-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	3 Months Ended
	Jan. 01, 2023	Sep. 30, 2017	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Apr. 01, 2022	Mar. 24, 2022	Sep. 22, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost not yet recognized			$ 1,415
Compensation expense recognition period			2 years 7 months 6 days
Granted (in shares)			10,000	0
Weighted-average grant date fair value (in dollars per share)			$ 1.26
Stock option, exercise price (in dollars per share)						$ 5.51
Options outstanding (in shares)			203,406		222,833		233,224
Non-employee Director | Jeffrey Cleland
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)							3,835
Non-employee Director | Elizabeth Garofalo
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)							5,000
Non-employee Director | Bali Muralidhar
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)							3,835
Non-employee Director | James Sulat
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)							3,112
Chief Executive Officer | Matthias Schroff
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)							29,373
Chief Financial Officer | Elias Papadimas
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)							12,513
Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant (in shares)			51,971
Maximum ESPP contribution rate as a percentage of compensation		15.00%
Maximum number of shares per employee in purchase period (in shares)		250
Maximum contribution amount		$ 25
ESPP purchase price as a percentage of market price		85.00%
Number of additional shares allowable annually under the plan (in shares)		10,000
Percentage of outstanding shares allowable as annual increase		0.30%
Increase in number of shares available for grant (in shares)	10,000
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years
Number of shares issued for each vested restricted stock unit (in shares)			1
Performance Based Restricted Stock | Period One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage			33.333%
Performance Based Restricted Stock | Period Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage			33.333%
Performance Based Restricted Stock | Period Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage			33.333%
Exicure, Inc. 2017 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)								194,750
Number of shares available for grant (in shares)			439,075					72,330
Number of additional shares authorized, potential maximum additional shares (in shares)			153,333
Number of additional shares authorized, percentage of common stock outstanding			5.00%
Exicure, Inc. 2017 Equity Incentive Plan | Options to purchase common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant (in shares)	153,333
Expiration period			10 years
Exicure, Inc. 2017 Equity Incentive Plan | Initial Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Monthly vesting percentage			2.08%
Vesting period			48 months
Exicure, Inc. 2017 Equity Incentive Plan | Initial Employee Stock Option | Non-employee Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Monthly vesting percentage			2.78%
Vesting period			36 months
Exicure, Inc. 2017 Equity Incentive Plan | Initial Employee Stock Option | Period One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage			25.00%
Exicure, Inc. 2017 Equity Incentive Plan | Subsequent Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Monthly vesting percentage			2.08%
Vesting period			48 months
Exicure, Inc. 2017 Equity Incentive Plan | Subsequent Employee Stock Option | Non-employee Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Monthly vesting percentage			8.33%
Vesting period			12 months
Exicure OpCo 2015 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant (in shares)								122,793

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Equity-Based Compensation - Schedule of Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 308	$ 342
Research and development expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	154	160
General and administrative expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 154	$ 182

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Equity-Based Compensation - Assumptions Used for Fair Value Measurement (Details)	3 Months Ended
	Mar. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate, minimum	3.83%
Risk-free interest rate, maximum	3.83%
Expected volatility, minimum	101.00%
Expected volatility, maximum	101.00%
Expected volatility	101.00%
Forfeiture rate	5.00%
Expected dividend yield	0.00%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term	5 years 9 months 18 days
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term	5 years 9 months 18 days
Weighted Average
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	3.83%

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Equity-Based Compensation - Fair Value of Underlying Common Stock and Exercise Price of Stock Options (Details)	Mar. 31, 2023 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of underlying common stock (in dollars per share)	$ 1.58
Exercise price of common stock option (in dollars per share)	1.58
Weighted Average
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of underlying common stock (in dollars per share)	1.58
Exercise price of common stock option (in dollars per share)	$ 1.58

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Equity-Based Compensation - Schedule of Stock Options Rollforward (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Apr. 01, 2022
Options
Shares outstanding, beginning period (in shares)	222,833
Granted (in shares)	10,000	0
Exercise (in shares)	0
Forfeited (in shares)	(29,427)
Shares outstanding, ending period (in shares)	203,406		222,833
Exercisable (in shares)	84,469
Vested and expected to vest (in shares)	196,229
Weighted-Average Exercise Price
Outstanding beginning balance (in dollars per share)	$ 4.74
Granted (in dollars per share)	1.58
Exercised (in dollars per share)	0
Forfeited (in dollars per share)	5.55
Outstanding ending balance (in dollars per share)	4.46		$ 4.74
Exercisable, weighted-average exercise price (in dollars per share)	5.40
Vested and expected to vest, weighted-average exercise price (in dollars per share)	$ 4.49
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted-Average Remaining Contractual Term (years)	6 years 8 months 12 days		7 years 6 months
Exercisable, weighted-average remaining contractual term	3 years 6 months
Vested and expected to vest, weighted average remaining contractual term	6 years 7 months 6 days
Aggregate Intrinsic Value (thousands)	$ 0		$ 0
Exercisable, aggregate intrinsic value	0
Vested and expected to vest, aggregate intrinsic value	$ 0
Stock option, exercise price (in dollars per share)				$ 5.51

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Equity-Based Compensation - RSU Activity (Details) - Restricted stock units	3 Months Ended
	Mar. 31, 2023 $ / shares shares
Restricted Stock Units
Unvested balance - beginning of period (in shares) | shares	20,885
Granted (in shares) | shares	0
Settled (in shares) | shares	(8,493)
Forfeited (in shares) | shares	(3,608)
Unvested balance - end of period (in shares) | shares	8,784
Weighted-Average Grant Date Fair Value
Unvested balance - beginning of period (in dollars per share) | $ / shares	$ 12.65
Granted (in dollars per share) | $ / shares	0
Settled (in dollars per share) | $ / shares	14.24
Forfeited (in dollars per share) | $ / shares	14.58
Unvested balance - end of period (in dollars per share) | $ / shares	$ 4.02

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Equity-Based Compensation - Performance-based Restricted Stock Unit Activity (Details) - Performance Based Restricted Stock	3 Months Ended
	Mar. 31, 2023 $ / shares shares
Performance-Based Restricted Stock Units
Unvested balance - beginning of period (in shares) | shares	97,643
Granted (in shares) | shares	0
Unvested balance - end of period (in shares) | shares	97,643
Weighted-Average Grant Date Fair Value
Unvested balance - beginning of period (in dollars per share) | $ / shares	$ 3.45
Granted (in dollars per share) | $ / shares	0
Unvested balance - end of period (in dollars per share) | $ / shares	$ 3.45

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Income Taxes (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 0	$ 0
Effective tax rate	0.00%	0.00%

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Loss Per Common Share - Computation of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Net loss	$ (4,407)	$ (8,348)
Weighted-average basic common shares outstanding (in shares)	6,288,952	4,031,316
Weighted-average diluted common shares outstanding (in shares)	6,288,952	4,031,316
Loss per share - basic (in dollars per share)	$ (0.70)	$ (2.07)
Loss per share - diluted (in dollars per share)	$ (0.70)	$ (2.07)

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Loss Per Common Share - Antidilutive Securities (Details) - shares	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Options to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive shares excluded from computation of weighted-average diluted common shares outstanding (in shares)	203,406	232,271
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive shares excluded from computation of weighted-average diluted common shares outstanding (in shares)	8,784	9,612
Performance stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive shares excluded from computation of weighted-average diluted common shares outstanding (in shares)	97,643	0
Warrants to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive shares excluded from computation of weighted-average diluted common shares outstanding (in shares)	576,261	576,261

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Fair Value Measurements - Assets and Liabilities Measured at Fair Value (Details) - Fair Value, Recurring - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Assets
Total financial assets	$ 1,629	$ 1,612
Liabilities
Warranty liability	800
Total financial liabilities	800
Level 1
Assets
Total financial assets	1,629	1,612
Liabilities
Warranty liability	0
Total financial liabilities	0
Level 2
Assets
Total financial assets	0	0
Liabilities
Warranty liability	0
Total financial liabilities	0
Level 3
Assets
Total financial assets	0	0
Liabilities
Warranty liability	800
Total financial liabilities	800
Money market funds
Assets
Cash equivalents:	1,629	1,612
Money market funds | Level 1
Assets
Cash equivalents:	1,629	1,612
Money market funds | Level 2
Assets
Cash equivalents:	0	0
Money market funds | Level 3
Assets
Cash equivalents:	$ 0	$ 0

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Fair Value Measurements - Schedule of Assumptions used to Estimate Fair Value of Warrant Liability (Details)	Mar. 31, 2023
Expected term
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Common stock warrant liability, measurement input	4.22
Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Common stock warrant liability, measurement input	1.6463
Value of underlying shares
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Common stock warrant liability, measurement input	1.84
Risk free interest rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Common stock warrant liability, measurement input	0.0193
Expected dividend yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Common stock warrant liability, measurement input	0

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Fair Value Measurements - Warrant Liability Activity (Details) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($) $ / shares shares
Warrants Outstanding
Beginning balance (in shares) | shares	0
Option to exercise (in shares) | shares	526
Ending balance (in shares) | shares	526
Fair Value Per Share
Beginning balance (in usd per share) | $ / shares	$ 0
Option to exercise (in usd per share) | $ / shares	1.52
Ending balance (in usd per share) | $ / shares	$ 1.52
Warrants And Rights Outstanding [Roll Forward]
Balance at December 31, 2022 | $	$ 0
Option to exercise | $	800
Balance at March 31, 2023 | $	$ 800

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Commitment and Contingencies (Details) $ in Thousands	Mar. 31, 2023 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Aggregate consideration paid to NU for agreement obligations	$ 11,540

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Related-Party Transactions-Narrative (Details) $ in Thousands	Feb. 27, 2023 USD ($)
Consulting services
Related Party Transaction [Line Items]
Amount of transaction	$ 218

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Subsequent Events (Details) - Subsequent Event - USD ($) $ in Millions	May 16, 2023	May 04, 2023	May 03, 2023
Subscription Agreement, Convertible Bond | Cyworld Z Co., Ltd.
Subsequent Event [Line Items]
Subscription amount	$ 1		$ 1
Stated yield	4.50%		4.50%
Period in between put options	3 months		3 months
Conversion percentage	100.00%		100.00%
Chicago
Subsequent Event [Line Items]
Sublease percentage of office space subtenant		57.00%
Period of no rental cost		3 months