424B3

Large accelerated filer

Accelerated filer

Non-accelerated filer

Smaller reporting company

Emerging growth company

424B3 1 abio_424b3_20240801.htm 424B3 424B3

Filed Pursuant to Rule 424(b)(3)

Registration No. 333-279387

Prospectus Supplement No. 1

(To Proxy Statement/Prospectus dated July 22, 2024)

ARCA biopharma, Inc.

This prospectus supplement updates, amends and supplements the proxy statement/prospectus dated July 22, 2024 (the “Proxy Statement/Prospectus”), relating to the proposed merger of ARCA biopharma, Inc., a Delaware corporation (“ARCA”), and Oruka Therapeutics, Inc., a Delaware corporation (“Oruka”), pursuant to an Agreement and Plan of Merger and Reorganization, entered into on April 3, 2024, pursuant to which Atlas Merger Sub Corp., a Delaware corporation, will merge with and into Oruka, with Oruka continuing as a wholly owned subsidiary of ARCA and the surviving corporation of the merger, and Oruka will merge with and into Atlas Merger Sub II, LLC, a Delaware limited liability company (“Second Merger Sub”), with Second Merger Sub being the surviving entity of the merger (the “Merger”). After the completion of the Merger, Second Merger Sub will change its corporate name to “Oruka Therapeutics Operating Company, LLC” and ARCA will change its name to “Oruka Therapeutics, Inc.” The Proxy Statement/Prospectus forms a part of ARCA’s Registration Statement on Form S-4 (Registration No. 333-279387).

This prospectus supplement is being filed to update, amend and supplement the Proxy Statement/Prospectus with the information contained in ARCA’s Quarterly Report on Form 10-Q filed with the SEC on August 1, 2024, which is set forth below.

This prospectus supplement is not complete without the Proxy Statement/Prospectus. This prospectus supplement should be read in conjunction with the Proxy Statement/Prospectus, which is to be delivered with this prospectus supplement, and is qualified by reference thereto, except to the extent that the information in this prospectus supplement updates or supersedes the information contained in the Proxy Statement/Prospectus. Please keep this prospectus supplement with your Proxy Statement/Prospectus for future reference.

ARCA’s common stock is listed on the Nasdaq Capital Market under the symbol “ABIO”. On July 31, 2024, the closing sale price of ARCA’s common stock was $3.00 per share.

INVESTING IN ARCA’S SECURITIES INVOLVES RISKS THAT ARE DESCRIBED IN THE “RISK FACTORS” SECTION BEGINNING ON PAGE 15 OF THE PROXY STATEMENT/PROSPECTUS.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the accuracy or adequacy of this prospectus supplement or the Proxy Statement/Prospectus. Any representation to the contrary is a criminal offense.

The date of this prospectus supplement is August 1, 2024.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

(Mark One)


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

FOR THE QUARTERLY PERIOD ENDED JUNE 30, 2024


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

FOR THE TRANSITION PERIOD FROM TO

Commission File Number 000-22873

ARCA BIOPHARMA, INC.

(Exact Name of Registrant as Specified in Its Charter)


Delaware		36-3855489
(State or Other Jurisdiction of Incorporation or Organization)		(I.R.S. Employer Identification Number)

10170 Church Ranch Way, Suite 100, Westminster, CO		80021
(Address of Principal Executive Offices)		(Zip Code)

(720) 940-2100

(Registrant’s Telephone Number, including Area Code)

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


Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, par value $0.001 per share	ABIO	Nasdaq Capital Market

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

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

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, 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.

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

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

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.


Class		Number of Shares Outstanding
Common Stock, par value $0.001 per share		On July 31, 2024: 14,507,143

ARCA BIOPHARMA, INC.

FORM 10-Q

FOR THE QUARTER ENDED June 30, 2024


		PAGE
Part I Financial Information
Item 1. Financial Statements (unaudited)		2
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations		16
Item 3. Quantitative and Qualitative Disclosures about Market Risk		24
Item 4. Controls and Procedures		24
Part II Other Information
Item 1. Legal Proceedings		26
Item 1A. Risk Factors		26
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds		57
Item 3. Defaults Upon Senior Securities		57
Item 4. Mine Safety Disclosures		57
Item 5. Other Information		57
Item 6. Exhibits		58
Signature		60

PART I. FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

ARCA BIOPHARMA, INC.

BALANCE SHEETS

(Unaudited)


	June 30,			December 31,
	2024			2023
	(in thousands, except share and per share amounts)
ASSETS
Current assets:
Cash and cash equivalents	$	33,283		$	37,431
Other current assets		537			161
Total current assets		33,820			37,592
Right-of-use asset - operating		8			247
Property and equipment, net		4			10
Other assets		12			12
Total assets	$	33,844		$	37,861

LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	571		$	362
Accrued compensation and employee benefits		109			100
Accrued expenses and other liabilities		591			175
Total current liabilities		1,271			637
Operating lease liability, net of current portion		—			204
Total liabilities		1,271			841
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.001 par value; 100 million shares authorized at June 30, 2024 and December 31, 2023; 14,507,143 shares and 14,501,143 shares issued and outstanding at June 30, 2024 and December 31, 2023, respectively		14			14
Additional paid-in capital		225,987			225,747
Accumulated deficit		(193,428	)		(188,741	)
Total stockholders’ equity		32,573			37,020
Total liabilities and stockholders’ equity	$	33,844		$	37,861

See accompanying Notes to Financial Statements

ARCA BIOPHARMA, INC.

STATEMENTS OF OPERATIONS

(unaudited)


	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2024			2023			2024			2023
	(in thousands, except share and per share amounts)
Costs and expenses:
General and administrative	$	2,992		$	1,719		$	5,309		$	3,125
Research and development (related party - $0 in 2024; and $108 and $216 as of the three and six months ended June 30, 2023, respectively)		130			254			295			644
Total costs and expenses		3,122			1,973			5,604			3,769
Loss from operations		(3,122	)		(1,973	)		(5,604	)		(3,769	)

Interest and other income		444			493			917			943
Net loss	$	(2,678	)	$	(1,480	)	$	(4,687	)	$	(2,826	)

Net loss per share:
Basic and diluted	$	(0.18	)	$	(0.10	)	$	(0.32	)	$	(0.20	)
Weighted average shares outstanding:
Basic and diluted		14,506,879			14,410,143			14,504,011			14,410,143

See accompanying Notes to Financial Statements

ARCA BIOPHARMA, INC.

STATEMENTS OF STOCKHOLDERS’ EQUITY

(unaudited)


	Stockholders’ Equity
					Additional
	Common stock				Paid-In		Accumulated
	Shares		Amount		Capital		Deficit			Total
	(in thousands, except share and per share amounts)

Balance, December 31, 2022		14,410,143	$	14	$	225,061	$	(183,402	)	$	41,673
Share-based compensation		—		—		204		—			204
Net loss		—		—		—		(1,346	)		(1,346	)
Balance, March 31, 2023		14,410,143		14		225,265		(184,748	)		40,531
Share-based compensation		—		—		187		—			187
Net loss		—		—		—		(1,480	)		(1,480	)
Balance, June 30, 2023		14,410,143		14		225,452		(186,228	)		39,238
Share-based compensation		—		—		154		—			154
Net loss		—		—		—		(1,424	)		(1,424	)
Balance, September 30, 2023		14,410,143		14		225,606		(187,652	)		37,968
Issuance of common stock upon vesting of Restricted Stock Units		91,000		—		—		—			—
Share-based compensation		—		—		141		—			141
Net loss		—		—		—		(1,089	)		(1,089	)
Balance, December 31, 2023		14,501,143		14		225,747		(188,741	)		37,020
Share-based compensation		—		—		114		—			114
Net loss		—		—		—		(2,009	)		(2,009	)
Balance, March 31, 2024		14,501,143		14		225,861		(190,750	)		35,125
Issuance of common stock upon stock option exercise		6,000		—		14		—			14
Share-based compensation		—		—		112		—			112
Net loss		—		—		—		(2,678	)		(2,678	)
Balance, June 30, 2024		14,507,143	$	14	$	225,987	$	(193,428	)	$	32,573

See accompanying Notes to Financial Statements

ARCA BIOPHARMA, INC.

STATEMENTS OF CASH FLOWS

(unaudited)


	Six Months Ended
	June 30,
	2024			2023
	(in thousands)
Cash flows from operating activities:
Net loss	$	(4,687	)	$	(2,826	)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation		6			8
Amortization of right-of-use asset - operating		25			50
Share-based compensation		226			391
Change in operating assets and liabilities:
Other current assets		(376	)		(345	)
Accounts payable		209			(93	)
Accrued compensation and employee benefits		9			17
Accrued expenses and other liabilities		426			509
Net cash used in operating activities		(4,162	)		(2,289	)
Cash flows from investing activities:
Net cash used in investing activities		—			—
Cash flows from financing activities:
Proceeds from issuance of common stock associated with stock options		14			—
Net cash provided by financing activities		14			—
Net decrease in cash and cash equivalents		(4,148	)		(2,289	)
Cash and cash equivalents, beginning of year		37,431			42,445
Cash and cash equivalents, end of period	$	33,283		$	40,156
Supplemental cash flow information:
Interest paid	$	—		$	-
Income tax refund received
Supplemental disclosure of noncash investing and financing transactions:
Leased assets and operating lease liabilities - amended lease term	$	214		$	—

See accompanying Notes to Financial Statements

ARCA BIOPHARMA, INC.

NOTES TO FINANCIAL STATEMENTS

(unaudited)

(1) The Company and Summary of Significant Accounting Policies

Description of Business

ARCA biopharma, Inc. (the Company or ARCA), a Delaware corporation, is headquartered in Westminster, Colorado. The Company is dedicated to applying a precision medicine approach to the development and commercialization of genetically targeted therapies for cardiovascular diseases. The Company’s lead product candidate is Gencaro™ (bucindolol hydrochloride) for the treatment of atrial fibrillation (AF) in patients with chronic heart failure (HF).

In April 2022, ARCA established a Special Committee of the board of directors (the “Board”) of ARCA to conduct a comprehensive review of strategic alternatives. As part of the strategic review process, the Company explored potential strategic alternatives that included, without limitation, an acquisition, merger, business combination or other transactions. The Company has and is continuing to explore strategic alternatives related to its product candidates and related assets, including, without limitation, licensing transactions and asset sales.

On April 3, 2024, following a comprehensive review of strategic alternatives, the Company, Atlas Merger Sub Corp., a Delaware corporation and a wholly-owned subsidiary of ARCA (“Merger Sub I”), Atlas Merger Sub II LLC, a Delaware limited liability company and a wholly-owned subsidiary of ARCA (“Merger Sub II”) and Oruka Therapeutics, Inc., a Delaware corporation (“Oruka”), entered into an Agreement and Plan of Merger and Reorganization (the “Merger Agreement”), pursuant to which, among other matters, and subject to the satisfaction or waiver of the conditions set forth in the Merger Agreement, Merger Sub I will merge with and into Oruka, with Oruka continuing as a wholly owned subsidiary of ARCA and the surviving corporation of such merger (the “First Merger”) and as part of the same overall transaction, the surviving corporation in the First Merger will merge with and into Merger Sub II with Merger Sub II continuing as a wholly owned subsidiary of ARCA and the surviving entity of such merger (the “Second Merger” and together with the First Merger, the “Merger”). The Merger is intended to qualify for federal income tax purposes as a tax-free reorganization under the provisions of Section 368(a) of the Internal Revenue Code of 1986, as amended.

In connection with the Merger, the Company will dispose of (or is in the process of disposing of) its legacy technology and intellectual property, including those related to Gencaro and rNAPc2. Any such disposal of legacy technology and intellectual property will be contingent upon obtaining stockholder approval for the Merger and is expected to occur immediately prior to or concurrently with the closing of the Merger. In the event that the Company shall enter into an agreement for any such sale or other disposition of its legacy assets at or prior to the closing of the Merger, the net proceeds received at or prior to the closing of the Merger will be included in the calculation of the net cash of ARCA as of the closing.

The Company’s future operations are highly dependent on the success of the Merger and there can be no assurances that the Merger will be successfully consummated. In the event that the Company does not complete the Merger, the Company may explore strategic alternatives, including, without limitation, another strategic transaction and/or pursue a dissolution and liquidation of the Company. See Note 10.

Liquidity and Going Concern

The Company devotes substantially all of its efforts towards obtaining regulatory approval and raising capital necessary to fund its operations and it is subject to a number of risks associated with clinical research and development, including dependence on key individuals, the development of and regulatory approval of commercially viable products, the need to raise adequate additional financing necessary to fund the development and commercialization of its products, and competition from larger companies. The Company has not generated revenue to date and has incurred substantial losses and negative cash flows from operations since its inception. The Company has historically funded its operations through issuances of common and preferred stock.

The Company believes that its current cash and cash equivalents as of June 30, 2024 will be sufficient to fund its operations through the end of fiscal year 2025. The future viability of the Company beyond that point is dependent on the results of the strategic review process and its ability to raise additional capital to fund its operations. The Company expects to continue to incur costs and expenditures in connection with the process of evaluating strategic alternatives. There can be no assurance, however, that the Company will be able to successfully consummate any particular strategic transaction, including the Merger Agreement. The process of continuing to evaluate these strategic options may be very costly, time-consuming and complex and the Company has incurred, and may in the future incur, significant costs related to this continued evaluation, such as legal, accounting and advisory fees and expenses and other related charges, see Note 10 regarding the Merger Agreement and special dividend payment. Should the Company pursue additional clinical trials for its product candidates, it will have to raise additional capital for clinical trials of Gencaro. The Company may not be able to raise sufficient capital on acceptable terms, or at all, to continue development of Gencaro or rNAPc2 or to otherwise continue operations and may not be able to execute any strategic transaction. Changing circumstances may cause us to consume capital significantly faster or slower than currently anticipated. The Company has based these estimates on assumptions that may prove to be wrong, and the Company could exhaust its available financial resources sooner than the Company currently anticipates. Depending on the results of the strategic review process, the Company may have to raise additional capital for clinical trials of Gencaro and to fund its operations. The Company may not be able to raise sufficient capital on acceptable terms, or at all, to continue development of Gencaro or rNAPc2 or to otherwise continue operations and may not be able to execute any strategic transaction.

The Company’s liquidity, and its ability to raise additional capital or complete any strategic transaction, depends on a number of factors, including, but not limited to, the following:

•

the timing and outcome of the strategic review process;

•

the consummation of any particular strategic transactions, including the Merger;

•

the costs and timing for the potential additional clinical trials in order to gain possible regulatory approval for Gencaro, rNAPc2, or any other product candidate;

•

the market price of the Company’s stock and the availability and cost of additional equity capital from existing and potential new investors;

•

the Company’s ability to retain the listing of its common stock on the Nasdaq Capital Market;

•

general economic and industry conditions affecting the availability and cost of capital, including as a result of deteriorating market conditions due to investor concerns regarding inflation, adverse developments affecting the financial services industry, continued hostilities between Russia and Ukraine and Hamas’ attack against Israel and the ensuing conflict;

•

the Company’s ability to control costs associated with its operations;

•

the costs of filing, prosecuting, defending and enforcing any patent claims and other intellectual property rights; and

•

the terms and conditions of the Company’s existing collaborative and licensing agreements.

The sale of additional equity or convertible debt securities would likely result in substantial additional dilution to the Company’s stockholders. If the Company raises additional funds through the incurrence of indebtedness, the obligations related to such indebtedness would be senior to rights of holders of the Company’s capital stock and could contain covenants that would restrict the Company’s operations. The Company also cannot predict what consideration might be available, if any, to the Company or its stockholders, in connection with any strategic transaction. Should strategic alternatives or additional capital not be available to the Company, or not be available on acceptable terms, the Company may be unable to realize value from its assets and discharge its liabilities in the normal course of business which may, among other alternatives, cause the Company to further delay, substantially reduce or discontinue operational activities to conserve its cash resources.

Basis of Presentation

The accompanying unaudited financial statements of the Company were prepared in accordance with generally accepted accounting principles for interim financial information and instructions to Form 10-Q and pursuant to Regulation S-X. Accordingly, these financial statements do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America (GAAP) for complete financial statements. In the opinion of management, these financial statements include all normal and recurring adjustments considered necessary for a fair presentation of these interim financial statements. The results of operations for the six months ended June 30, 2024 are not necessarily indicative of results expected for the full year ending December 31, 2024. The Company has generated no revenue to date and its activities have consisted of seeking regulatory approval, research and development, exploring strategic alternatives for further developing and commercializing Gencaro and rNAPc2, and raising capital. These unaudited financial statements should be read in conjunction with the audited financial statements and footnotes thereto for the year ended December 31, 2023 included in the Company’s Annual Report on Form 10-K filed with the Securities and Exchange Commission. Amounts presented are rounded to the nearest thousand, where indicated, except per share data and par values.

Concentrations of Credit Risk

Financial instruments that potentially subject the Company to significant concentrations of credit risk consist primarily of cash and cash equivalents. The Company has no off-balance-sheet concentrations of credit risk, such as foreign exchange contracts, option contracts, or foreign currency hedging arrangements. The Company maintains cash and cash equivalent balances in the form of bank demand deposits and money market fund accounts with financial institutions that management believes are creditworthy. Such balances may at times exceed the insured amount.

Comprehensive Loss

Comprehensive loss is defined as the change in equity during a period from transactions and other events and/or circumstances from non-owner sources. If the Company had comprehensive gains (losses), they would be reflected in the statement of operations and comprehensive loss and as a separate component in the statement of stockholders’ equity. There were no elements of comprehensive loss during the three and six months ended June 30, 2024 and 2023.

Leases

The Company determines if an arrangement is a lease at inception. Operating leases are included in right-of-use (ROU) asset – operating and lease obligations are included in accrued expenses and other liabilities and operating lease liability on the Company’s June 30, 2024 and December 31, 2023 balance sheets.

ROU lease assets represent the Company’s right to use an underlying asset for the lease term and lease obligations represent the Company’s obligation to make lease payments arising from the lease. Operating ROU lease assets are recognized at the commencement date based on the present value of lease payments over the lease term. As the Company’s leases do not provide an implicit rate, the Company uses its incremental borrowing rate based on the information available at the commencement date in determining the present value of lease payments. The Company’s lease terms may include options to extend or terminate a lease when it is reasonably certain that the Company will exercise that option. Lease expense for lease payments is recognized on a straight-line basis over the lease term.

Accrued Outsourcing Expenses

As part of the process of preparing its financial statements, the Company is required to estimate accrued outsourcing expenses. This process involves identifying services that third parties have performed on the Company’s behalf and estimating the level of service performed and the associated cost incurred for these services as of the balance sheet date. Examples of estimated accrued outsourcing expenses include contract service fees, such as fees payable to contract manufacturers in connection with the production of materials related to the Company’s drug product, and service fees and pass through costs from clinical research organizations. The Company develops estimates of liabilities using its judgment based upon the facts and circumstances known at the time.

Recent Accounting Pronouncements

The Company reviewed recently issued accounting pronouncements and concluded that they were either not applicable or not expected to have a significant impact to the financial statements.

(2) Net Loss Per Share

The Company calculates basic loss per share by dividing net loss by the weighted average common shares outstanding during the period. Diluted loss per share is computed by dividing net loss by the weighted average number of common shares outstanding during the period increased to include, if dilutive, the number of additional common shares that would have been outstanding if the potential common shares had been issued. The Company’s potentially dilutive shares include stock options and restricted stock units.

Because the Company reported a net loss for the three and six months ended June 30, 2024 and 2023, all potentially dilutive shares of common stock have been excluded from the computation of the dilutive net loss per share for all periods presented. Such potentially dilutive shares of common stock consist of the following:


	June 30,
	2024		2023
Potentially dilutive securities, excluded:
Outstanding stock options		607,055		619,782
Unvested restricted stock units		—		91,000
		607,055		710,782

(3) Fair Value Disclosures

There were no marketable securities as of June 30, 2024 or December 31, 2023.

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (exit price). Inputs used to measure fair value are classified into the following hierarchy:

•

Level 1—Unadjusted quoted prices in active markets for identical assets or liabilities. The Company’s Level 1 assets consist of money market investments. The Company does not have any Level 1 liabilities.

•

Level 2—Unadjusted quoted prices in active markets for similar assets or liabilities; unadjusted quoted prices for identical or similar assets or liabilities in markets that are not active; or inputs other than quoted prices that are observable for the asset or liability. The Company does not have any Level 2 assets or liabilities.

•

Level 3—Unobservable inputs for the asset or liability. The Company does not have any Level 3 assets or liabilities.

As of June 30, 2024 and December 31, 2023, the Company had $33.2 million and $37.4 million, respectively, of cash equivalents consisting of money market funds with original maturities of 90 days or less. The Company has the ability to liquidate these investments without restriction. The Company determines fair value for these money market funds with Level 1 inputs through quoted market prices. There were no transfers of assets between fair value hierarchy levels during the six months ended June 30, 2024.

Fair Value of Other Financial Instruments

The carrying amount of other financial instruments, including accounts payable, approximated fair value due to their short maturities.

(4) Property and Equipment

Property and equipment consist of the following (in thousands):


	Estimated Life	June 30, 2024			December 31, 2023
Computer equipment	3 years	$	39		$	39
Lab equipment	5 years		130			130
Furniture and fixtures	5 years		37			37
Computer software	3 years		16			16
			222			222
Accumulated depreciation and amortization			(218	)		(212	)
Property and equipment, net		$	4		$	10

For the six months ended June 30, 2024 and 2023, depreciation and amortization expense was $6,000 and $8,000 respectively.

(5) Related Party Arrangements

Separation of Michael Bristow, M.D., President, Chief Executive Officer and Director

Effective April 3, 2024, ARCA and Dr. Michael Bristow, President, Chief Executive Officer and a member of the Board mutually agreed to conclude Dr. Bristow’s employment and service as a director.

In connection with Dr. Bristow’s separation, ARCA and Dr. Bristow entered into a separation agreement (the “Separation Agreement”) on April 3, 2024. Pursuant to the terms of the Separation Agreement, ARCA provided to Dr. Bristow a lump sum payment equal to (i) twelve (12) months of Dr. Bristow’s base salary as of the last date of his employment and (ii) a cash payment of $25,000, less applicable withholdings. The severance benefits were conditioned on the non-revocation by Dr. Bristow of a legal release of claims and was paid in the second quarter of 2024.

ARCA and Dr. Bristow entered into a consulting agreement, effective April 3, 2024 (the “Consulting Agreement”), pursuant to which Dr. Bristow is providing certain consulting services provided for in the Consulting Agreement to ARCA until the earlier of (i) the completion of services under the Consulting Agreement, (ii) a termination in accordance with the terms of the Consulting Agreement, and (iii) upon a Change of Control (as defined in ARCA’s 2020 Equity Incentive Plan (the “Plan”)). Pursuant to the Consulting Agreement, Dr. Bristow provision of services under the Consulting Agreement are deemed to be a Continuous Service (as defined in the Plan) and, as a result, his equity awards under the Plan continue to vest during the term of the Consulting Agreement.

Transactions with the Company’s Former President and Chief Executive Officer

The Company has entered into unrestricted research grants with its former President and Chief Executive Officer’s academic research laboratory at the University of Colorado. Funding of any unrestricted research grants is contingent upon the Company’s financial condition, and can be deferred or terminated at the Company’s discretion. There was no expense under these arrangements for the six months ended June 30, 2024. Total expense under these arrangements for the six months ended June 30, 2023 was $216,000. In December 2023, the Company made a payment of $125,000 for the grant period July 2022 through December 2023 under these arrangements. In April 2024, Dr. Bristow resigned, see above.

(6) Commitments and Contingencies

The Company has or is subject to the following commitments and contingencies.

As of the date of this filing, one complaint has been filed by a purported ARCA stockholder against ARCA and its board of directors in connection with the proposed Merger. On May 20, 2024, a purported stockholder filed a complaint, captioned Wynter v. ARCA biopharma, Inc., et al., No.: 1:24-cv-1418-STV (D. Colo.) (the “Complaint”), against ARCA and its board of directors. The Complaint alleges that the defendants filed or caused to be filed a materially incomplete and misleading preliminary registration statement with the U.S. Securities and Exchange Commission (the “SEC”) and asserts claims under Sections 14(a) and 20(a) of the Exchange Act. The Complaint seeks an order enjoining the proposed Merger, or in the event that the proposed Merger is consummated, an order rescinding the Merger or awarding rescissory damages, as well as costs, including attorneys’ and experts’ fees. ARCA cannot predict the outcome of the Complaint. ARCA believes that the allegations and claims asserted in the Complaint are without merit and intends to defend against them vigorously. Additional lawsuits arising out of the Merger may be filed.

Employment Agreements and Reduction of Workforce

The Company maintains employment agreements with several key executive employees. The agreements may be terminated at any time by the Company with or without cause upon written notice to the employee, and entitle the employee to wages in lieu of notice for periods not exceeding one calendar year from the date of termination without cause or by the employee for good reason. Certain of these agreements also provide for payments to be made under certain conditions related to a change in control of the Company.

In December 2022, the Company’s Board of Directors approved retention bonuses for certain employees, subject to continued employment with the Company through the earlier of a change in control of the Company or certain clinical development decisions totaling $265,000. In November 2023, the retention bonuses were amended to increase the aggregate amount of the retention bonus by 50% and in order to assist with tax obligations associated with the vesting of certain Company restricted stock unit awards in December 2023, a total of $86,000 was paid in December 2023. In April 2024, the retention bonuses were again amended to increase the aggregate amount of the retention bonus, as discussed in Note 10. As of June 30, 2024, the unpaid retention bonuses totaled $444,000, none of which was accrued as of June 30, 2024, since there had not been a change in control or clinical development decision.

The Company and Christopher D. Ozeroff, the former Secretary, Senior Vice President and General Counsel of ARCA mutually agreed to conclude Mr. Ozeroff’s employment effective March 31, 2023. Pursuant to Mr. Ozeroff’s existing employment agreement, as previously amended, ARCA provided Mr. Ozeroff severance benefits pursuant to the terms of his existing employment agreement with the Company, as previously amended. The severance benefits included severance payments and reimbursement to cover out-of-pocket costs to continue group health insurance benefits under COBRA, whether he elects or is eligible to receive COBRA. During the year ended December 31, 2023, the Company recorded an expense of $159,000 for these severance benefits, none of which remains unpaid.

The Company and Dr. Michael Bristow, former President, Chief Executive Officer and a member of the board of directors of ARCA mutually agreed to conclude Dr. Bristow’s employment and service as a director, effective April 3, 2024. See Note 5.

Operating Leases

On August 29, 2020 the Company entered into a lease agreement for approximately 5,200 square feet of office facilities in Westminster, Colorado which serves as the Company’s primary business office effective October 1, 2020 (October 2020 Lease). The lease term was 42 months beginning October 1, 2020. In March 2024, the Company entered into an amendment to extend the lease term six (6) months through September 2024. If the Company elects to stay in the property after September 2024, it will pay rent month to month equal to 125% of the base rent paid in September 2024. In June 2021, the Company entered into a sublease agreement for approximately 3,000 square feet of additional office facilities in the Company’s primary business office (2021 Lease). The sublease term was 29 months and terminated in October 2023. The leases include real estate taxes and insurance, which is not a lease component and is not included in the lease obligation. In addition, common area maintenance charges are based on actual costs incurred and are a non-lease component that is not included in the lease obligation.

Future minimum commitments due under the October 2020 Lease agreement, as amended, as of June 30, 2024 are as follows (in thousands):


Remaining in 2024	$	25
Total remaining lease payments		25
Less: imputed lease interest		(1	)
Less: Current portion		(24	)
Operating lease liability, net of current portion	$	—

Rent expense, which is included in general and administrative expense, for the six months ended June 30, 2024 and 2023 was $31,000 and $63,000, respectively.

As of June 30, 2024, the lease liability was $24,000, it is all current and is included in accrued expenses and other liabilities in the accompanying balance sheet. Cash paid for amounts included in the measurement of lease liabilities and the operating cash flows from operating leases for the six months ended June 30, 2024 and 2023 were $47,000 and $67,000, respectively. The weighted-average remaining lease term for the operating lease as of June 30, 2024 is 0.3 years. The discount rate for the operating lease is 7%.

Patent Agreement

In July 2021, the Company entered into a patent assignment agreement (the Agreement) with the University Medical Center of Johannes Gutenberg University Mainz, Germany.

Under the terms of the Agreement, the Company received exclusive world-wide patent rights relating to the use of rNAPc2 as a potential treatment for COVID-19, and other indications, based on the research and discoveries from Univ.-Prof. Dr. Wolfram Ruf, the Scientific Director and Alexander von Humboldt Professor at the Center for Thrombosis and Hemostasis (CTH) of the University Medical Center Mainz, and his collaborators. The Company has upfront and potential milestone obligations to the University Medical Center Mainz that could total approximately €1.6 million and royalty obligations in the low single digit range, if rNAPc2 receives

regulatory approval and is commercialized. The term of the Agreement extends to the date of expiration of the last to expire of any of the assigned patents.

(7) Equity Financings

At the Market Equity Financing

In 2020, the Company entered into a Capital on Demand TM Sales Agreement (the Sales Agreement) with JonesTrading Institutional Services LLC, as agent (JonesTrading), pursuant to which the Company may offer and sell, from time to time through JonesTrading, shares of the Company’s common stock, par value $0.001 per share (the Common Stock).

In 2021, the Company amended the 2020 Sales Agreement and the amount available for the offering under its prospectus to the Company’s registration statement on Form S-3 (No. 333-254585), which expired in March 2024. In April 2024, the Company terminated the Sales Agreement in accordance with its terms.

No sales were made under the Sales Agreement in 2024 or 2023.

Merger Agreement

See “Financing Transaction” discussion in Note 10 below.

(8) Share-based Compensation

For the three and six months ended June 30, 2024 and 2023, the Company recognized the following non-cash, share-based compensation expense in the statements of operations (in thousands):



	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
General and administrative	$	112	$	145	$	226	$	308
Research and development		—		42		—		83
Total	$	112	$	187	$	226	$	391

Stock option transactions for the six months ended June 30, 2024 under the Company’s stock incentive plans were as follows:


	Options Outstanding
	Number of Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)
Options outstanding - December 31, 2023		616,707		$	4.76		7.35
Granted		42,000			1.64
Exercised		(6,000	)		2.32
Forfeited and cancelled		(45,652	)		10.05
Options outstanding - June 30, 2024		607,055		$	4.17		7.00
Options exercisable - June 30, 2024		506,540		$	4.44		6.90
Options vested and expected to vest - June 30, 2024		607,039		$	4.17		7.00

(9) Income Taxes

In accordance with GAAP, a valuation allowance should be provided if it is more likely than not that some or all of the Company’s deferred tax assets will not be realized. The Company’s ability to realize the benefit of its deferred tax assets will depend on the generation of future taxable income. Due to the uncertainty of future profitable operations and taxable income, the Company has recorded a full valuation allowance against its net deferred tax assets. The Company believes its tax filing positions and deductions related to tax periods subject to examination will be sustained upon audit and, therefore, has no reserve for uncertain tax positions.

(10) Merger Agreement

Merger Agreement

On April 3, 2024, ARCA, Merger Sub I, Merger Sub II and Oruka entered into the Merger Agreement, pursuant to which, among other matters, and subject to the satisfaction or waiver of the conditions set forth in the Merger Agreement, Merger Sub I will merge with and into Oruka, with Oruka continuing as a wholly owned subsidiary of ARCA’s and the surviving corporation of the First Merger and as part of the same overall transaction, the surviving corporation in the First Merger will merge with and into Merger Sub II with Merger Sub II continuing as a wholly owned subsidiary of ARCA’s and the surviving entity of the Second Merger. The Merger is intended to qualify for federal income tax purposes as a tax-free reorganization under the provisions of Section 368(a) of the Internal Revenue Code of 1986, as amended.

Subject to the terms and conditions of the Merger Agreement, at the closing of the First Merger (the “First Effective Time”), (a) each then-outstanding share of Oruka common stock (including shares of Oruka common stock issued in the financing transaction described below) will be converted solely into the right to receive a number of shares of our common stock calculated in accordance with the Merger Agreement (the “Exchange Ratio”), (b) each then-outstanding share of Oruka preferred stock will be converted into the right to receive a number of shares of Series B Preferred Stock (as defined below) calculated in accordance with the Merger Agreement, (c) each then-outstanding option to purchase Oruka common stock will be assumed by ARCA, subject to adjustment as set forth in the Merger Agreement and (d) each then-outstanding warrant to purchase shares of Oruka common stock will be converted into a warrant to purchase shares of our common stock, subject to adjustment as set forth in the Merger Agreement and form of warrant. Under the terms of the Merger Agreement, prior to the closing of the transaction, ARCA’s board of directors will accelerate the vesting of all equity awards of ARCA’s then outstanding but not then vested or exercisable, and cancel each option (the “Out of the Money Options”) to acquire shares of our common stock with an exercise price per share greater than the volume weighted average closing trading price of a share of our common stock on The Nasdaq Stock Market LLC (“Nasdaq”) for the five (5) consecutive trading days ending three (3) days immediately prior to the closing date of the First Merger (the “Parent Closing Price”), in each case, in accordance with the terms of the Merger Agreement. At the First Effective Time, each option to acquire shares of our common stock with an exercise price less than or equal to the Parent Closing Price will be cancelled and converted into the right to receive an amount in cash, without interest, equal to the Parent Closing Price less the exercise price of such option.

Under the Exchange Ratio formula in the Merger Agreement, upon the First Effective Time, on a pro forma basis and based upon the number of shares of our common stock expected to be issued in the First Merger, pre-First Merger Oruka stockholders (including Oruka stockholders issued shares of Oruka common stock and pre-funded warrants in the Oruka pre-closing financing transaction described below) will own approximately 97.61% of the combined company and pre-First Merger ARCA stockholders will own approximately 2.39% of the combined company. For purposes of calculating the Exchange Ratio, (i) shares of our common stock underlying warrants and other rights to receive shares (other than Options to acquire shares of our common stock, to the extent cancelled at or prior to the First Effective Time in accordance with the Merger Agreement) outstanding as of immediately prior to the First Effective Time will be deemed to be outstanding, and (ii) all shares of Oruka common stock underlying outstanding Oruka stock options and warrants will be deemed to be outstanding. The Exchange Ratio will be adjusted to the extent that ARCA’s net cash at closing is less than $5.0 million and will be based on the amount of proceeds actually received by Oruka in the financing transaction described below, as further described in the Merger Agreement.

In addition, prior to the First Effective Time, ARCA expects to declare a cash dividend to the pre-First Merger ARCA stockholders equal in the aggregate to ARCA’s reasonable, good faith approximation of the amount by which ARCA’s net cash (as determined pursuant to the Merger Agreement) will exceed $5.0 million. ARCA management currently anticipates that ARCA’s net cash as of closing to be approximately $5.0 million, after giving effect to the special cash dividend, which is expected to be approximately $20.0 million.

In connection with the Merger, ARCA is required to seek the approval of its stockholders to, among other things, (a) issue shares of our common stock issuable in connection with the First Merger (including the shares of our common stock issuable under the Series B Preferred Stock) under the rules of Nasdaq, and (b) amend its amended and restated certificate of incorporation, to (i) effect a reverse stock split of our common stock (if deemed necessary by ARCA and Oruka), (ii) increase the number of shares of our common stock

that it is authorized to issue, and (iii) such other changes as are mutually agreeable to ARCA and Oruka (the “ARCA Voting Proposals”).

Each of ARCA and Oruka has agreed to customary representations, warranties and covenants in the Merger Agreement, including, among others, covenants relating to (1) using commercially reasonable efforts to obtain the requisite approval of its stockholders, (2) non-solicitation of alternative acquisition proposals, (3) the conduct of their respective businesses during the period between the date of signing the Merger Agreement and the closing of the Merger, (4) ARCA using commercially reasonable efforts to maintain the existing listing of our common stock on Nasdaq and cause the shares of our common stock to be issued in connection with the First Merger to be approved for listing on Nasdaq prior to the First Effective Time, and (5) ARCA filing with the SEC and causing to become effective a registration statement to register shares of our common stock to be issued in connection with the First Merger, except as set forth in the Merger Agreement (the “Registration Statement”).

Consummation of the Merger is subject to certain closing conditions, including, among other things, (1) approval by ARCA’s stockholders of the ARCA Voting Proposals, (2) approval by the requisite Oruka stockholders of the adoption and approval of the Merger Agreement and the transactions contemplated thereby, (3) Nasdaq’s approval of the initial listing application to be submitted in connection with the First Merger, (4) the effectiveness of the Registration Statement, (5) the expiration of any applicable waiting periods (or extensions thereof) under the Hart Scott-Rodino Antitrust Improvements Act of 1976, as amended, (6) the Subscription Agreement (defined below) being in full force and effect providing for the receipt of proceeds of not less than $175,000,000 (including in the proceeds any notes contributed as consideration in the Oruka pre-closing financing transaction described below) and (7) to the extent ARCA has declared the cash dividend described above, ARCA delivering the aggregate amount distributable to the pre-First Merger ARCA stockholders to its’ transfer agent for further distribution to the pre-First Merger ARCA stockholders. Each party’s obligation to consummate the Merger is also subject to other specified customary conditions, including regarding the accuracy of the representations and warranties of the other party, subject to the applicable materiality standard, and the performance in all material respects by the other party of its obligations under the Merger Agreement required to be performed on or prior to the date of the closing of the Merger.

The Merger Agreement contains certain termination rights of each of ARCA and Oruka. Upon termination of the Merger Agreement under specified circumstances, ARCA and Oruka may each be required to pay the other party a termination fee of $440,000.

Pursuant to a Certificate of Designation of Preferences, Rights and Limitations of the Series B Non-Voting Convertible Preferred Stock to be filed by ARCA with the Secretary of State of the State of Delaware (the “Certificate of Designation”) in connection with the Merger Agreement and the transactions thereunder, ARCA will establish the terms of a new series of preferred stock of ARCA designated as Series B Non-Voting Convertible Preferred Stock, par value $0.001 per share (the “Series B Preferred Stock”). Holders of the Series B Preferred Stock will be entitled to receive dividends on shares of Series B Preferred Stock equal to, on an as-if-converted-to-ARCA common stock basis, and in the same form as dividends actually paid on shares of our common stock. Except as otherwise required by the Certificate of Designation or law, the Series B Preferred Stock will not have voting rights. However, as long as any shares of Series B Preferred Stock are outstanding, ARCA will not, without the affirmative vote of the holders of a majority of the then outstanding shares of the Series B Preferred Stock, (a) alter or change adversely the powers, preferences or rights given to the ARCA Series B Preferred Stock, (b) alter or amend the Certificate of Designation, (c) amend ARCA’s certificate of incorporation, bylaws or other charter documents in any manner that adversely affects any rights of the holders of the Series B Preferred Stock, (d) file any articles of amendment, certificate of designations, preferences, limitations and relative rights of any series of Preferred Stock (as defined in the Certificate of Designation), if such action would adversely alter or change the preferences, rights, privileges or powers of, or restrictions provided for the benefit of the ARCA Series B Preferred Stock, (e) issue further shares of the Series B Preferred Stock or increase or decrease (other than by conversion) the number of authorized shares of the Series B Preferred Stock, (f) at any time while at least 30% of the originally issued ARCA Series B Preferred Stock remains issued and outstanding, consummate either (A) a Fundamental Transaction (as defined in the Certificate of Designation) or (B) any merger or consolidation of ARCA or other business combination in which ARCA’s stockholders immediately before such transaction do not hold at least a majority of the capital stock of ARCA immediately after such transaction, or (f) enter into any agreement with respect to any of the foregoing. The Series B Preferred Stock does not have a preference upon any liquidation, dissolution or winding-up of ARCA.

Following the First Effective Time, each share of Series B Preferred Stock then outstanding shall be convertible, at any time and from time to time, at the option of the holder of the Series B Preferred Stock, into a number of shares equal to 1,000 shares of our common stock, subject to certain limitations, including that a holder of Series B Preferred Stock is prohibited from converting shares of Series B Preferred Stock into shares of our common stock if, as a result of such conversion, such holder, together with its affiliates, would beneficially own more than a specified percentage (initially set at 9.99%) of the total number of shares of our common stock issued and outstanding immediately after giving effect to such conversion.

At the First Effective Time, the combined company’s board of directors is expected to consist of six (6) members, all of whom will be designated by Oruka. Upon the closing of the transaction, the combined company will be led by Oruka’s chief executive officer.

Financing Transaction

Concurrently with the execution and delivery of the Merger Agreement, certain parties entered into a subscription agreement with Oruka (as amended and restated, the “Subscription Agreement”), pursuant to which they have agreed, subject to the terms and conditions of such agreement, to purchase immediately prior to the consummation of the First Merger, shares of Oruka common stock and pre-funded warrants to purchase shares of Oruka common stock (together, the “PIPE Securities”) for an aggregate purchase price of approximately $275.0 million. On July 3, 2024, the Subscription was amended and restated to provide for, among other things, for warrants to be issued to certain of Oruka’s employees, directors and service providers. The consummation of the transactions contemplated by such agreement is conditioned on the satisfaction or waiver of the conditions set forth in the Merger Agreement and in the Subscription Agreement. Shares of Oruka common stock and pre-funded warrants to purchase shares of Oruka common stock issued pursuant to this financing transaction will be converted into shares of our common stock and pre-funded warrants to acquire shares our common stock, in accordance with the Exchange Ratio and the Merger Agreement.

Appointment of Thomas Keuer as President

Effective as of April 3, 2024, the Board appointed Thomas A. Keuer, the Company’s Chief Operating Officer, to serve as ARCA’s President and principal executive officer. Mr. Keuer has been with ARCA since 2006, and as its Chief Operating Officer for the last nine years, a position he will continue to serve in. Mr. Keuer will not receive any additional compensation in connection with his appointment as President and principal executive officer. Mr. Keuer’s position will end upon closing of the merger transaction with Oruka Therapeutics, Inc. as previously disclosed on a Current Report on Form 8-K filed with the SEC on April 3, 2024.

Second Amendment to Retention Bonus Letter of Thomas A. Keuer and C. Jeffrey Dekker

On April 20, 2024, the board of directors of ARCA approved the second amendment of certain retention bonus letters between ARCA and each of Thomas A. Keuer and C. Jeffrey Dekker to increase the aggregate amount of the retention bonus with respect to each such executive to $200,000. The remaining portion of the retention bonus with respect to Thomas A. Keuer and C. Jeffrey Dekker, consisting of $165,000, will become payable consistent with the original terms of the applicable retention bonus letter and first amendment to retention bonus letter. Any payment related to the retention bonuses of Thomas A. Keuer and C. Jeffrey Dekker will be paid by ARCA via payroll within 30 business days of the date of occurrence of the applicable “Payment Event Date” (as such term is otherwise defined in the applicable second amendment to the retention bonus letter). Each such retention bonus letter and first amendment to retention bonus letter will otherwise remain subject to their original terms and conditions.

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

This Management’s Discussion and Analysis of Financial Condition and Results of Operations contains “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), Section 21E of the Securities Exchange Act of 1934, as amended, (the “Exchange Act”), and the Private Securities Litigation Reform Act of 1995, concerning ARCA, Oruka, the proposed pre-closing financing and the proposed merger between ARCA and Oruka (collectively, the “Proposed Transactions”) and other matters. These forward-looking statements include, but are not limited to, express or implied statements relating to ARCA’s or Oruka’s management team’s expectations, hopes, beliefs, intentions or strategies regarding the future including, without limitation, statements regarding: the Proposed Transactions and the expected effects, perceived benefits or opportunities, including investment amounts from investors and expected proceeds, and related timing with respect thereto, expectations regarding or plans for discovery, preclinical studies, clinical trials and research and development programs, in particular with respect to ORKA-001 and ORKA-002, and any developments or results in connection therewith, including the target product profile of each of ORKA-001 and ORKA-002; the anticipated timing of the commencement of and results from those studies and trials; expectations regarding the use of proceeds, the sufficiency of post-transaction resources to support the advancement of Oruka’s pipeline through certain milestones and the time period over which Oruka’s post-transaction capital resources will be sufficient to fund its anticipated operations; the cash balance of the combined entity at closing; expectations regarding the treatment of psoriasis and associated diseases; expectations related to ARCA’s contribution and payment of dividends in connection with the merger, including the timing thereof; and the expected trading of the combined company’s stock on Nasdaq under the ticker symbol “ORKA,” potential future development plans for Gencaro our ability to secure sufficient financing to support any clinical trials for Gencaro,the likelihood that any Phase 3 clinical trial results for Gencaro will satisfy the requirements of our Special Protocol Assessment agreement, the expected features and characteristics of Gencaro, including the potential for genetic variations to predict individual patient response to Gencaro, Gencaro’s potential to treat atrial fibrillation, or AF, future treatment options for patients with AF, the potential for Gencaro to be the first genetically-targeted AF prevention treatment, statements regarding potential Phase 3 development plans for Gencaro, including the timing and results thereof, and the ability of ARCA’s financial resources to support its operations at the current levels through the end of fiscal year 2025, our ability to obtain additional funding when needed or enter into a strategic or other transaction, the extent to which our issued and pending patents may protect our products and technology, the potential of such product candidates to lead to the development of safe or effective therapies, our ability to enter into collaborations, or our ability to maintain listing of our common stock on a national exchange. Actual results and performance could differ materially from those projected in the forward-looking statements as a result of many factors discussed herein and elsewhere. These and other factors are identified and described in more detail in ARCA’s filings with the U.S. Securities and Exchange Commission (the “SEC”), including, without limitation in our Annual Report on Form 10-K for the year ended December 31, 2023, and subsequent filings. Forward-looking statements may be identified by words including “will,” “plan,” “anticipate,” “believe,” “intend,” “estimates,” “expect,” “should,” “may,” “potential” and similar expressions. We disclaim any intent or obligation to update these forward-looking statements.

The terms “ARCA,” “the Company,” “we,” “us,” “our” and similar terms refer to ARCA biopharma, Inc.

Overview

We are dedicated to applying a precision medicine approach to the development and commercialization of targeted therapies for cardiovascular diseases. Precision medicine refers to the tailoring of medical treatment to the individual characteristics of patients, using genomic, non-genomic biomarker and other information that extends beyond routine diagnostic categorization. We believe that when implemented correctly precision medicine can enhance therapeutic response, improve patient outcomes, and reduce healthcare costs.

Our lead product candidate is Gencaro™ (bucindolol hydrochloride) for the treatment of atrial fibrillation (“AF”) in patients with chronic heart failure (“HF”). Gencaro is being developed for patients who have a genotype that identifies a drug target associated with heightened efficacy.

Merger Agreement

On April 3, 2024, we, Atlas Merger Sub Corp., a Delaware corporation and a wholly-owned subsidiary of ARCA (“Merger Sub I”), Atlas Merger Sub II LLC, a Delaware limited liability company and a wholly-owned subsidiary of ARCA (“Merger Sub II”) and Oruka Therapeutics, Inc., a Delaware corporation (“Oruka”), entered into an Agreement and Plan of Merger and Reorganization (the “Merger Agreement”), pursuant to which, among other matters, and subject to the satisfaction or waiver of the conditions set forth in the Merger Agreement, Merger Sub I will merge with and into Oruka, with Oruka continuing as a wholly owned subsidiary of ours and the surviving corporation of such merger (the “First Merger”) and as part of the same overall transaction, the surviving corporation in the First Merger will merge with and into Merger Sub II with Merger Sub II continuing as a wholly owned subsidiary of ours and the surviving entity of such merger (the “Second Merger” and together with the First Merger, the “Merger”). The Merger is intended to qualify for federal income tax purposes as a tax-free reorganization under the provisions of Section 368(a) of the

Internal Revenue Code of 1986, as amended.

Subject to the terms and conditions of the Merger Agreement, at the closing of the First Merger (the “First Effective Time”), (a) each then-outstanding share of Oruka common stock (including shares of Oruka common stock issued in the financing transaction described below) will be converted solely into the right to receive a number of shares of our common stock calculated in accordance with the Merger Agreement (the “Exchange Ratio”), (b) each then-outstanding share of Oruka preferred stock will be converted into the right to receive a number of shares of Series B Preferred Stock (as defined below) of ours calculated in accordance with the Merger Agreement (c) each then-outstanding option to purchase Oruka common stock will be assumed by us, subject to adjustment as set forth in the Merger Agreement and (d) each then-outstanding warrant to purchase shares of Oruka common stock will be converted into a warrant to purchase shares of our common stock, subject to adjustment as set forth in the Merger Agreement and form of warrant. Under the terms of the Merger Agreement, prior to the closing of the transaction, our board of directors (the “Board”) will accelerate the vesting of all equity awards of ours then outstanding but not then vested or exercisable, and cancel each option (the “Out of the Money Options”) to acquire shares of our common stock with an exercise price per share greater than the volume weighted average closing trading price of a share of our common stock on The Nasdaq Stock Market LLC (“Nasdaq”) for the five (5) consecutive trading days ending three (3) days immediately prior to the closing date of the First Merger (the “Parent Closing Price”), in each case, in accordance with the terms of the Merger Agreement. At the First Effective Time, each option to acquire shares of our common stock with an exercise price less than or equal to the Parent Closing Price will be cancelled and converted into the right to receive an amount in cash, without interest, equal to the Parent Closing Price less the exercise price of such option.

Under the Exchange Ratio formula in the Merger Agreement, upon the First Effective Time, on a pro forma basis and based upon the number of shares of our common stock expected to be issued in the First Merger, pre-First Merger Oruka stockholders (including Oruka stockholders issued shares of Oruka common stock and pre-funded warrants in the financing transaction described below) will own approximately 97.61% of the combined company and pre-First Merger ARCA stockholders will own approximately 2.39% of the combined company. For purposes of calculating the Exchange Ratio, (i) shares of our common stock underlying warrants and other rights to receive shares (other than Options to acquire shares of our common stock, to the extent cancelled at or prior to the First Effective Time in accordance with the Merger Agreement) outstanding as of immediately prior to the First Effective Time will be deemed to be outstanding, and (ii) all shares of Oruka common stock underlying outstanding Oruka stock options and warrants will be deemed to be outstanding. The Exchange Ratio will be adjusted to the extent that our net cash at closing is less than $5.0 million and will be based on the amount of proceeds actually received by Oruka in the financing transaction described below, as further described in the Merger Agreement.

In addition, prior to the First Effective Time, we expect to declare a cash dividend to the pre-First Merger ARCA stockholders equal in the aggregate to our reasonable, good faith approximation of the amount by which our net cash (as determined pursuant to the Merger Agreement) will exceed $5.0 million. Our management currently anticipates that our net cash as of closing to be approximately $5.0 million, after giving effect to the special cash dividend, which is expected to be approximately $20.0 million.

In connection with the Merger, we are required to seek the approval of its stockholders to, among other things, (a) issue shares of our common stock issuable in connection with the First Merger (including the shares of our common stock issuable under the Series B Preferred Stock) under the rules of Nasdaq, and (b) amend its amended and restated certificate of incorporation, to (i) effect a reverse stock split of our common stock (if deemed necessary by us and Oruka), (ii) increase the number of shares of our common stock that we are authorized to issue, and (iii) such other changes as are mutually agreeable to us and Oruka (the “ARCA Voting Proposals”).

Each of we and Oruka has agreed to customary representations, warranties and covenants in the Merger Agreement, including, among others, covenants relating to (1) using commercially reasonable efforts to obtain the requisite approval of its stockholders, (2) non-solicitation of alternative acquisition proposals, (3) the conduct of their respective businesses during the period between the date of signing the Merger Agreement and the closing of the Merger, (4) us using commercially reasonable efforts to maintain the existing listing of the our common stock on Nasdaq and cause the shares of our common stock to be issued in connection with the First Merger to be approved for listing on Nasdaq prior to the First Effective Time, and (5) us filing with the U.S. Securities and Exchange Commission (the “SEC”) and causing to become effective a registration statement to register shares of our common stock to be issued in connection with the First Merger, except as set forth in the Merger Agreement (the “Registration Statement”).

Consummation of the Merger is subject to certain closing conditions, including, among other things, (1) approval by our stockholders of the ARCA Voting Proposals, (2) approval by the requisite Oruka stockholders of the adoption and approval of the Merger Agreement and the transactions contemplated thereby, (3) Nasdaq’s approval of the initial listing application to be submitted in connection with the First Merger, (4) the effectiveness of the Registration Statement, (5) the expiration of any applicable waiting periods (or extensions thereof) under the Hart Scott-Rodino Antitrust Improvements Act of 1976, as amended, (6) the Subscription Agreement (as defined below) being in full force and effect providing for the receipt of proceeds of not less than $175,000,000 (including in the proceeds any notes contributed as consideration in the financing transaction described below) and (7) to the extent we have declared the cash dividend described above, us delivering the aggregate amount distributable to the pre-First Merger ARCA stockholders to our transfer agent for further distribution to the pre-First Merger ARCA stockholders. Each party’s obligation to consummate the Merger is also subject to other specified customary conditions, including regarding the accuracy of the representations and warranties of the other party, subject to the applicable materiality standard, and the performance in all material

respects by the other party of its obligations under the Merger Agreement required to be performed on or prior to the date of the closing of the Merger.

The Merger Agreement contains certain termination rights of each of us and Oruka. Upon termination of the Merger Agreement under specified circumstances, we and Oruka may each be required to pay the other party a termination fee of $440,000.

Pursuant to a Certificate of Designation of Preferences, Rights and Limitations of the Series B Non-Voting Convertible Preferred Stock to be filed by us with the Secretary of State of the State of Delaware (the “Certificate of Designation”) in connection with the Merger Agreement and the transactions thereunder, We will establish the terms of a new series of preferred stock of ARCA designated as Series B Non-Voting Convertible Preferred Stock, par value $0.001 per share (the “Series B Preferred Stock”). Holders of the Series B Preferred Stock will be entitled to receive dividends on shares of Series B Preferred Stock equal to, on an as-if-converted-to-ARCA common stock basis, and in the same form as dividends actually paid on shares of our common stock. Except as otherwise required by the Certificate of Designation or law, the Series B Preferred Stock will not have voting rights. However, as long as any shares of Series B Preferred Stock are outstanding, we will not, without the affirmative vote of the holders of a majority of the then outstanding shares of the Series B Preferred Stock, (a) alter or change adversely the powers, preferences or rights given to the Series B Preferred Stock, (b) alter or amend the Certificate of Designation, (c) amend our certificate of incorporation, bylaws or other charter documents in any manner that adversely affects any rights of the holders of the Series B Preferred Stock, (d) file any articles of amendment, certificate of designations, preferences, limitations and relative rights of any series of Preferred Stock (as defined in the Certificate of Designation), if such action would adversely alter or change the preferences, rights, privileges or powers of, or restrictions provided for the benefit of the Series B Preferred Stock, (e) issue further shares of the Series B Preferred Stock or increase or decrease (other than by conversion) the number of authorized shares of the Series B Preferred Stock, (f) at any time while at least 30% of the originally issued Series B Preferred Stock remains issued and outstanding, consummate either (A) a Fundamental Transaction (as defined in the Certificate of Designation) or (B) any merger or consolidation of us or other business combination in which our stockholders immediately before such transaction do not hold at least a majority of the capital stock of ARCA immediately after such transaction, or (f) enter into any agreement with respect to any of the foregoing. The Series B Preferred Stock does not have a preference upon any liquidation, dissolution or winding-up of ARCA.

At the First Effective Time, the combined company's board of directors is expected to consist of six (6) members, all of whom will be designated by Oruka. Upon the closing of the transaction, the combined company will be led by Oruka’s chief executive officer.

In connection with the Merger, ARCA will dispose of (or is in the process of disposing of) its legacy technology and intellectual property, including those related to Gencaro™ (bucindolol hydrochloride) and Recombinant Nematode Anticoagulant Protein c2 (“rNAPc2”). Any such disposal of legacy technology and intellectual property will be contingent upon obtaining stockholder approval for the Merger and is expected to occur immediately prior to or concurrently with the closing of the Merger. In the event that ARCA shall enter into an agreement for any such sale or other disposition of its legacy assets at or prior to the closing of the Merger, the net proceeds received at or prior to the closing of the Merger will be included in the calculation of the net cash of ARCA as of the closing.

Financing Transaction

Concurrently with the execution and delivery of the Merger Agreement, certain parties entered into a subscription agreement with Oruka (as amended and restated, the “Subscription Agreement”), pursuant to which they have agreed, subject to the terms and conditions of such agreement, to purchase immediately prior to the consummation of the First Merger, shares of Oruka common stock and pre-funded warrants to purchase shares of Oruka common stock (together, the “PIPE Securities”) for an aggregate purchase price of approximately $275.0 million. On July 3, 2024, the Subscription was amended and restated to provide for, among other things, for warrants to be issued to certain of Oruka’s employees and service providers. The consummation of the transactions contemplated by such agreement is conditioned on the satisfaction or waiver of the conditions set forth in the Merger Agreement and in the Subscription Agreement. Shares of Oruka common stock and pre-funded warrants to purchase shares of Oruka common stock issued pursuant to this financing transaction will be converted into shares of our common stock and pre-funded warrants to acquire shares our common stock, in accordance with the Exchange Ratio and the Merger Agreement.

Our future operations are highly dependent on the success of the Merger and there can be no assurances that the Merger will be successfully consummated. There can be no assurance that the strategic review process or any transaction relating to a specific asset, including the Merger or any asset sale, will result in us pursuing such a transaction(s), or that any transaction(s), if pursued, will be completed on terms favorable to us and our stockholders in the existing entity or any possible entity that results from a combination of entities. If the strategic review process is unsuccessful, our Board may decide to pursue a dissolution and liquidation.

Separation of Michael Bristow, M.D., President, Chief Executive Officer and Director

Effective April 3, 2024, ARCA and Dr. Michael Bristow, President, Chief Executive Officer and a member of the Board mutually agreed to conclude Dr. Bristow’s employment and service as a director.

Appointment of Thomas Keuer as President

Gencaro™ (bucindolol hydrochloride) for Atrial Fibrillation

Gencaro™ (bucindolol hydrochloride) is a pharmacogenetically-targeted beta-adrenergic receptor antagonist with mild vasodilator properties that we are developing for the treatment of atrial fibrillation in patients with heart failure. We believe the pharmacology of Gencaro is unique and its efficacy can be enhanced by prescribing it to patients with a common genotypic variant that is present in approximately 50% of the North American and European general populations. This gene can be detected with a simple genetic test.

We are developing Gencaro to treat atrial fibrillation (“AF”) in patients with chronic heart failure (“HF”). AF is the most common form of cardiac arrhythmia, a disruption of the heart’s normal rhythm or rate. HF is a chronic condition in which the heart is unable to pump enough blood to meet the body’s needs. AF and HF commonly occur together. In HF patients, the development of AF leads to worsening symptoms, and increased risk of hospitalization and death. Current treatment options for AF in HF patients are limited, and can be invasive, costly and dangerous.

Our development plan for Gencaro focuses on the treatment of AF in patients with higher ejection fraction HF, those who have an ejection fraction (“EF”) of 40% and higher who also have the genotype we believe is optimal for Gencaro efficacy. This population of HF encompasses more than half of all HF patients in the United States and Europe. There are currently few approved or effective drug therapies to treat AF or HF in this patient population.

Our development plan for Gencaro is based on our published analysis of the Phase 2b clinical trial of Gencaro for the prevention of AF in HF patients, known as GENETIC-AF. This analysis showed novel results for Gencaro in patients in the clinical trial with EF’s of 40% and higher. We currently have an agreement with the FDA, known as a Special Protocol Assessment (“SPA”) for the requirements of a Gencaro Phase 3 clinical trial, PRECISION-AF, that would support approval of Gencaro if successful. The Phase 3 pivotal clinical trial of Gencaro conducted under an SPA will include secondary endpoints that are intended to capture some of this information, such as a reduction in the need to deploy rhythm control interventions including electrical cardioversion, catheter ablation and use of anti-arrhythmic drugs and avoidance of drug-related complications such as bradycardia. We were issued a United States patent in February 2021 for the use of Gencaro in a patient population identified as part of the clinical trial. We believe this patent will substantially extend the patent protection for our planned development of Gencaro into 2039. We have sought or are seeking similar patent protection in other countries.

We believe that patients with HF and AF represent a major unmet medical need, and this need is most pronounced in patients with EF values of 40% and above. This EF range constitutes more than half of all chronic HF in the United States and Europe, as well as in Japan and China, and there are currently few approved, effective or guideline-recommended therapies for these patients to treat either their AF or HF. AF is a very common complication in these patients, with estimates of AF incidence ranging from 40% to 60%. Beta-blockers approved for HF are commonly used off-label to control heart rate in these patients, but they are not considered effective in preventing AF and none are approved for patients with EF ≥ 40%. Other anti-arrhythmic drugs approved for the treatment of AF have adverse side effects and in HF patients are either contraindicated or have label warnings for use due to an increased risk of mortality.

Interventional procedures for AF, such as catheter ablation and electrical cardioversion, are invasive, expensive, and often temporary; these interventions also typically require the continued use of beta blockers and other anti-arrhythmic drugs post-intervention.

We believe that Gencaro, if approved, may be a safe and more effective therapy for the treatment of higher ejection fraction HF patients with AF. We believe there are several potentially important attributes that would differentiate Gencaro from existing therapies, including:

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More effective rhythm control compared to the current standard of care;

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Reduction in the need for catheter ablation, electrical cardioversion, or toxic anti-arrhythmic drugs;

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Maintenance of rhythm control after a successful AF catheter ablation;

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Effective rate control with lower risk of treatment-limiting, adverse event producing bradycardia;

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Reduction in symptoms and improvement in quality of life;

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Reduced health care burden;

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Foundational beta-blocker benefits for HF and unique evidence of efficacy in HF patients with AF;

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One of the only drug therapies approved and shown effective for AF in HF patients with EF ≥ 40%, and the only one in its drug class.

We have an international patent portfolio for Gencaro in the United States, the EU, and other major markets, as well as new chemical entity status, including a new patent that we believe will give us a strong intellectual property position to at least approximately 2039 in the United States; we have filed applications similar to this new patent in international territories. We have developed a laboratory platform for the diagnostic test that would be used to prescribe Gencaro; this platform was approved by FDA for use in the Phase 2B clinical trial. We retain all rights to this test platform; we expect to use it in future clinical trials, and we believe it could be one of multiple diagnostic platforms used for commercialization.

rNAPc2 (AB201) for treatment of COVID-19

Recombinant Nematode Anticoagulant Protein c2 (“rNAPc2”) (AB201) is a protein therapeutic in clinical development as a potential treatment for patients with COVID-19. Based on its unique mechanism of action, development history and the clinical evidence from the SARS-CoV-2 pandemic, we believe rNAPc2 has potential to be a beneficial therapy for patients with this serious viral disease. We initiated a Phase 2b clinical trial of rNAPc2 as a potential treatment for patients hospitalized with COVID-19 in the fourth quarter of 2020 and completed patient enrollment in the fourth quarter 2021. In the clinical trial, both doses of rNAPc2 demonstrated a treatment benefit for patients based on the coagulation biomarker D-dimer, however, neither dose achieved statistical significance for the primary efficacy endpoint of change in D-dimer level from Baseline to Day 8 compared to standard of care heparin.

On the secondary endpoints measuring thrombotic events and time-to-recovery, there was a numerical imbalance in favor of rNAPc2 that was non-significant. rNAPc2 was well-tolerated at both doses. There were no serious treatment-related adverse events and no dose dependent increase in adverse events was observed. There was no difference between rNAPc2 and standard-of-care heparin in major or non-major clinically relevant bleeding. We currently do not plan additional clinical development of rNAPc2 unless we are able to find a commercial or government partner to pay for development and commercialization or expansion into clinical trials for other disease indications.

To support the continued development of Gencaro and rNAPc2, we will need additional financing to fully fund any clinical trials, and our general and administrative costs through the clinical trials’ projected completion and potential commercialization. Considering the substantial time and costs associated with the development of Gencaro and rNAPc2 and the risk that we may be unable to raise a significant amount of capital on acceptable terms, we are also pursuing co-development and commercialization partnering opportunities with large pharmaceutical and/or specialty pharmaceutical companies and may pursue a strategic combination or other strategic transactions. If we are unable to obtain sufficient financing or are unable to complete a strategic transaction, we may discontinue our development activities on Gencaro or rNAPc2 or discontinue our operations.

In 2020, we entered into a new sales agreement with a placement agent to sell, from time to time, in an “at the market offering.”

In 2021, we amended the new sales agreement and the amount available for the offering under our prospectus to our registration statement on Form S-3 (No. 333-254585), which expired in March 2024. In April 2024, we terminated such sales agreement in accordance with its terms. No sales were made under this sales agreement in 2024 or 2023.

Results of Operations

General and Administrative Expenses

General and administrative (“G&A”) expenses primarily consist of personnel costs, consulting and professional fees, insurance, facilities and depreciation expenses, and various other administrative costs.

G&A expenses were $3.0 million for the three months ended June 30, 2024, compared to $1.7 million for the corresponding period of 2023, an increase of $1.3 million. G&A expenses were $5.3 million for the six months ended June 30, 2024 compared to $3.1 million for the corresponding period of 2023, an increase of $2.2 million. During the three and six months ended June 30, 2024, we recorded $370,000 for one-time termination benefits related to the separation of Dr. Michael Bristow, the former Chief Executive Officer of ARCA, effective April 3, 2024. During the three months ended March 31, 2023, we recorded $159,000 for one-time termination benefits related to the mutually agreed to conclusion of Christopher D. Ozeroff's employment, the former Secretary, Senior Vice President and General Counsel of ARCA, effective March 31, 2023. The increase for the three month period was primarily the result of a $0.9 million increase in professional fees primarily related to the Merger Agreement discussed above and $0.4 million higher one-time termination benefits from the terminations discussed above. The increase for the six month period was primarily a result of a $2.0 million increase in professional fees primarily related to the Merger Agreement discussed above and $0.2 million higher one-time termination benefits from the terminations discussed above.

G&A expenses in 2024 are expected to be higher than those in 2023 as we incur professional fees related to the Merger Agreement discussed above and maintain administrative activities to support our ongoing operations. We expect to incur significant costs related to our exploration of strategic alternatives and the Merger, including legal, accounting and advisory expenses and other related charges.

While we do not believe that inflation had a material effect on our financial condition and results of operations during the periods presented, it may result in increased costs in the foreseeable future.

Research and Development Expenses

Research and development (“R&D”) expense is comprised primarily of personnel costs, clinical development, manufacturing process development, and regulatory activities and costs.

R&D expense for the three months ended June 30, 2024 was $0.1 million compared to $0.3 million for the corresponding period of 2023, a decrease of $0.1 million. R&D expense for the six months ended June 30, 2024 was $0.3 million compared to $0.6 million for the corresponding period of 2023, a decrease of $0.3 million.

R&D personnel costs decreased approximately $0.1 million and $0.3 million for the three and six months ended June 30, 2024, respectively, as compared to the corresponding periods of 2023, due to decreased headcount.

Manufacturing process development costs for the three and six months ended June 30, 2024 and 2023 were consistent.

R&D expense decreased $0.1 million and $0.2 million for the three and six months ended June 30, 2024 related to the unrestricted research grants with ARCA's former President and Chief Executive Officer’s academic research laboratory at the University of Colorado. There was no expense under these arrangements for the three or six months ended June 30, 2024. Total expense under these arrangements for the three and six months ended June 30, 2023 was $108,000 and $216,000, respectively. In December 2023, the Company made a payment of $125,000 for the grant period July 2022 through December 2023 under these arrangements. In April 2024, the former President and Chief Executive Officer resigned.

R&D expense in 2024 is expected to be lower than 2023 while we explore strategic alternatives. Should we resume clinical trials of product candidates, we expect research and development costs to increase significantly for the foreseeable future as our product candidate development programs progress.

Interest and Other Income

Interest and other income was $444,000 and $493,000 in the three months ended June 30, 2024 and 2023, respectively. Interest and other income was $917,000 and $943,000 in the six months ended June 30, 2024 and 2023. Interest income was higher due to higher interest rates in 2024 compared to the corresponding periods of 2023.

Interest income for the remainder of 2024 is expected to be lower than the first half of 2024 as we use cash to fund operations.

Liquidity and Capital Resources

Cash and Cash Equivalents


	June 30,		December 31,
	2024			2023
	(in thousands)
Cash and cash equivalents	$	33,283		$	37,431

As of June 30, 2024, we had total cash and cash equivalents of $33.3 million, as compared to $37.4 million as of December 31, 2023. The net decrease of $4.1 million primarily reflects the cash used in operating activities during the six months ended June 30, 2024.

Cash Flows from Operating, Investing and Financing Activities


	Six Months Ended June 30,
	2024			2023
	(in thousands)
Net cash used in:
Operating activities	$	(4,162	)	$	(2,289	)
Investing activities		—			—
Financing activities		14			—
Net decrease in cash and cash equivalents	$	(4,148	)	$	(2,289	)

Net cash used in operating activities for the six months ended June 30, 2024 was higher than the same period in 2023. This net increase of $1.9 million was primarily due to higher outflows related to changes in operating assets and liabilities and a higher net loss in 2024, as discussed in Results of Operations above.

There were no investing activities in the six months ended June 30, 2024 and 2023.

Net cash provided by financing activities in the six months ended June 30, 2024 of $14,000 related to proceeds from a stock option exercise. There were no financing activities in the six months ended June 30, 2023.

Sources and Uses of Capital

Our primary sources of liquidity to date have been capital raised from issuances of shares of our preferred and common stock. The primary uses of our capital resources to date have been to fund operating activities, including research, clinical development and drug manufacturing expenses, license payments, and spending on capital items.

In 2020, we entered into a new sales agreement with a placement agent to sell, from time to time, in an “at the market offering.”

Our ability to execute our development programs in accordance with our projected time line depends on a number of factors, including, but not limited to, the following:

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the timing and outcome of the strategic review process;

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the consummation of any particular strategic transactions, including the Merger;

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the costs and timing for the potential additional clinical trials in order to gain possible regulatory approval for Gencaro, rNAPc2 or any other product candidate;

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the market price of our stock and the availability and cost of additional equity capital from existing and potential new investors;

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our ability to retain the listing of our common stock on the Nasdaq Capital Market;

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our ability to control costs associated with its operations;

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the costs of filing, prosecuting, defending and enforcing any patent claims and other intellectual property rights; and

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the terms and conditions of our existing collaborative and licensing agreements.

We believe our cash and cash equivalents as of June 30, 2024 will be sufficient to fund our operations through the end of fiscal year 2025. Our future viability beyond that point is dependent on the results of the strategic review process and our ability to raise additional capital to fund our operations. We expect to continue to incur costs and expenditures in connection with the process of evaluating strategic alternatives. There can be no assurance, however, that we will be able to successfully consummate any particular strategic transaction, including the Merger Agreement. The process of continuing to evaluate these strategic options may be very costly, time-consuming and complex and we have incurred, and may in the future incur, significant costs related to this continued evaluation, such as legal, accounting and advisory fees and expenses and other related charges, see discussion above regarding the Merger Agreement and special dividend payment. Should we pursue additional clinical trials for our product candidates, we will have to raise additional capital for clinical trials of Gencaro. We may not be able to raise sufficient capital on acceptable terms, or at all, to continue development of Gencaro or rNAPc2 or to otherwise continue operations and may not be able to execute any strategic transaction. Our Merger Agreement discussed above may impact this projection. Conducting a Phase 3 PRECISION-AF trial would likely require additional financing, subject to our pursuit of a potential strategic transaction and the consummation of such potential transaction. However, changing circumstances may cause us to consume capital significantly faster or slower than currently anticipated. We have based these estimates on assumptions that may prove to be wrong, and we could exhaust our available financial resources sooner than we currently anticipate; therefore, we may have to raise additional capital for other clinical trials. Initiating any Phase 3 clinical trial of Gencaro will require additional financing. If we resume the development of product candidates, we may not be able to raise sufficient capital on acceptable terms, or at all, to continue development and potential commercialization Gencaro or to otherwise continue operations and may not be able to execute any strategic transaction.

In April 2022, we established a Special Committee of the Board to conduct a comprehensive review of strategic alternatives. As part of the strategic review process, we explored potential strategic alternatives that included, without limitation, an acquisition, merger, business combination or other transactions. We have and are continuing to explore strategic alternatives related to our product candidates and related assets, including, without limitation, licensing transactions and asset sales.

On April 3, 2024, following a comprehensive review of strategic alternatives, we, Atlas Merger Sub Corp., a Delaware corporation and a wholly-owned subsidiary of ours (“Merger Sub I”), Atlas Merger Sub II LLC, a Delaware limited liability company and a wholly-owned subsidiary of ours (“Merger Sub II”) and Oruka Therapeutics, Inc., a Delaware corporation (“Oruka”), entered into an Agreement and Plan of Merger and Reorganization (the “Merger Agreement”), pursuant to which, among other matters, and subject to the satisfaction or waiver of the conditions set forth in the Merger Agreement, Merger Sub I will merge with and into Oruka, with Oruka continuing as a wholly owned subsidiary of ours and the surviving corporation of the merger (the “First Merger”) and as part of the same overall transaction, the surviving corporation in the First Merger will merge with and into Merger Sub II with Merger Sub II continuing as a wholly owned subsidiary of ours and the surviving entity of the merger (the “Second Merger” and together with the First Merger, the “Merger”). The Merger is intended to qualify for federal income tax purposes as a tax-free reorganization under the provisions of Section 368(a) of the Internal Revenue Code of 1986, as amended.

In connection with the Merger, we will dispose of (or are in the process of disposing of) our legacy technology and intellectual property, including those related to Gencaro and rNAPc2. Any such disposal of legacy technology and intellectual property will be contingent upon obtaining stockholder approval for the Merger and is expected to occur immediately prior to or concurrently with the closing of the Merger. In the event that we shall enter into an agreement for any such sale or other disposition of its legacy assets at or prior to the closing of the Merger, the net proceeds received at or prior to the closing of the Merger will be included in the calculation of the net cash of ARCA as of the closing.

Our future operations are highly dependent on the success of the Merger and there can be no assurances that the Merger will be successfully consummated. In the event that we do not complete the Merger, we may explore strategic alternatives, including, without limitation, another strategic transaction and/or pursue a dissolution and liquidation of the Company. See "Merger Agreement" discussion above.

Critical Accounting Policies and Estimates

A critical accounting policy is one that is both important to the portrayal of our financial condition and results of operation and requires our management’s most difficult, subjective or complex judgments, often as a result of the need to make estimates about the effect of matters that are inherently uncertain. Our significant accounting policies are described in Note 1 of “Notes to Financial Statements” included within our 2023 Annual Report on Form 10-K filed with the SEC. Following is a discussion of the accounting policies that we believe involve the most difficult, subjective or complex judgments and estimates.

Accrued Outsourcing Expenses

As part of the process of preparing our financial statements, we are required to estimate accrued outsourcing expenses. This process involves identifying services that third parties have performed on our behalf and estimating the level of service performed and the associated cost incurred for these services as of the balance sheet date. Examples of estimated accrued outsourcing expenses include contract service fees, such as fees payable to contract manufacturers in connection with the production of materials related to our drug product, and service fees from clinical research organizations. We develop estimates of liabilities using our judgment based upon the facts and circumstances known at the time.

Indemnifications

In the ordinary course of business, we enter into contractual arrangements under which we may agree to indemnify certain parties from any losses incurred relating to the services they perform on our behalf or for losses arising from certain events as defined within the particular contract. Such indemnification obligations may not be subject to maximum loss clauses. We have entered into indemnity agreements with each of our directors, officers and certain employees. Such indemnity agreements contain provisions, which are in some respects broader than the specific indemnification provisions contained in Delaware law. We also maintain an insurance policy for our directors and executive officers insuring against certain liabilities arising in their capacities as such.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Not applicable.

ITEM 4. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed in the reports that we file under the Securities Exchange Act of 1934, as amended (the “Exchange Act’), is recorded, processed, summarized and reported within the time periods specified in the rules and forms of the SEC, 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 disclosures. In designing and evaluating the disclosure controls and procedures, management recognized that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management necessarily was required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

As required by Rule 13a-15(b) of the Exchange Act, an evaluation was carried out under the supervision and with the participation of management, including our principal executive officer and principal financial officer, of the effectiveness of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) as of the end of the quarter covered by this report. Based on the foregoing, our principal executive officer and principal financial officer concluded that our disclosure controls and procedures were effective at a reasonable level of assurance.

Changes in Internal Control over Financial Reporting

There has been no change in our internal control over financial reporting during our most recent fiscal quarter that would materially affect or is reasonably likely to materially affect, our internal control over financial reporting.

PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

The information required by this Part II, Item 1 is incorporated herein by reference to the information set forth under the caption “Commitments and Contingencies” in Note 6 to the condensed consolidated financial statements included in this report.

Item 1A. Risk Factors

An investment in our securities involves certain risks, including those set forth below and elsewhere in this report. In addition to the risks set forth below and elsewhere in this report, other risks and uncertainties not known to us, that are beyond our control or that we deem to be immaterial may also materially adversely affect our business operations. You should carefully consider the risks described below as well as other information and data included in this report.

Summary of Risk Factors

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

Risks Related to the Merger

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Failure to complete, or delays in completing, the potential merger with Oruka could materially and adversely affect our results of operations, business, financial results and/or common stock price.

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The exchange ratio will not change or otherwise be adjusted based on the market price of our common stock.

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The issuance of our common stock, including shares of our common stock issuable upon conversion of our Series B Preferred Stock, to Oruka stockholders pursuant to the Merger Agreement and the resulting change in control from the First Merger must be approved by our stockholders, and the Merger Agreement and transactions contemplated thereby must be approved by the Oruka stockholders. Failure to obtain these approvals would prevent the closing of the Merger.

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If we complete the Merger, the combined company will need to raise additional capital and satisfy certain contractual obligations by issuing equity securities or additional debt or through licensing arrangements, which may cause significant dilution to the combined company’s stockholders or restrict the combined company’s operations.

•

Our expected disposal of our historical assets and operations in connection with our proposed Merger with Oruka will make us a shell company. As a result, we will be subject to more stringent reporting requirements, offering limitations and resale restrictions.

•

Some of our and Oruka’s directors and executive officers have interests in the Merger that are different from yours and that may influence them to support or approve the Merger without regard to your interests.

•

Our stockholders and Oruka stockholders may not realize a benefit from the Merger commensurate with the ownership dilution they will experience in connection with the Merger, including the conversion of Oruka common stock issued in the Oruka pre-closing financing.

Risks Related to the Reverse Stock Split

•

The reverse stock split may not increase our stock price over the long-term.

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The reverse stock split may decrease the liquidity of our common stock.

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The reverse stock split may lead to a decrease in our overall market capitalization.

Risks Related to ARCA

•

We have a limited operating history, no history of commercializing products, have not generated any product revenue, have incurred significant operating losses since inception and anticipate continuing to incur net losses for the foreseeable future.

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If we do not successfully consummate the Merger or another strategic transaction, our board of directors may explore strategic alternatives, including, without limitation, another strategic transaction and/or pursue a dissolution and liquidation of ARCA.

•

If the Merger is not consummated and should we pursue additional clinical trials for our product candidates, we may not be able to raise sufficient capital on acceptable terms, or at all, to continue development of Gencaro or rNAPc2 or to otherwise continue operations and may not be able to execute any strategic transaction.

•

Our failure to meet Nasdaq’s continued listing requirements could result in a delisting of our common stock, which could have a material adverse effect on our ability to consummate the Merger.

Risks Related to the Merger with Oruka

Failure to complete, or delays in completing, the potential merger with Oruka, announced on April 3, 2024, could materially and adversely affect our results of operations, business, financial results and/or common stock price.

On April 3, 2024, we entered into an Agreement and Plan of Merger and Reorganization (the “Merger Agreement”) with Oruka Therapeutics, Inc. (“Oruka”), pursuant to which, among other matters, and subject to the satisfaction or waiver of the conditions set forth in the Merger Agreement, Atlas Merger Sub Corp., our wholly-owned subsidiary (“Merger Sub I”), will merge with and into Oruka, with Oruka continuing as a wholly owned subsidiary of ours and the surviving corporation of the merger (the “First Merger”) and as part of the same overall transaction, the surviving corporation in the First Merger will merge with and into Atlas Merger Sub II LLC, a wholly-owned subsidiary of ours (“Merger Sub II”), with Merger Sub II continuing as a wholly owned subsidiary of ours and the surviving entity of the merger (the “Second Merger” and together with the First Merger, the “Merger”). Consummation of the Merger is subject to certain closing conditions, a number of which are not within our control. Any failure to satisfy these required conditions to closing may prevent, delay or otherwise materially adversely affect the completion of the transaction. We cannot predict with certainty whether or when any of the required closing conditions will be satisfied or if another uncertainty may arise and cannot assure you that we will be able to successfully consummate the Merger as currently contemplated under the Merger Agreement or at all.

Our efforts to complete the Merger could cause substantial disruptions in, and create uncertainty surrounding, our business, which may materially adversely affect our results of operation and our business. Uncertainty as to whether the Merger will be completed in a timely manner or at all may affect our ability to retain and motivate existing employees. Uncertainty as to whether the Merger will be completed in a timely manner or at all could adversely affect our business and our relationship with collaborators, suppliers, vendors, regulators and other business partners. For example, vendors, collaborators and other counterparties may defer their decisions to work with us or seek to change their existing business relationships with us. Changes to, or termination of, existing business relationships could adversely affect our results of operations and financial condition, as well as the market price of our common stock. The adverse effects of the pendency of the transaction could be exacerbated by any delays in completion of the transaction or termination of the Merger Agreement.

If the conditions to the Merger are not satisfied or waived, the Merger may not occur.

Even if the Merger is approved by the stockholders of Oruka and our shareholders, specified conditions must be satisfied or, to the extent permitted by applicable law, waived to complete the Merger. These conditions are set forth in the Merger Agreement. We cannot assure you that all of the conditions to the consummation of the Merger will be satisfied or waived. If the conditions are not satisfied or waived, the Merger may not occur or the closing may be delayed.

The exchange ratio will not change or otherwise be adjusted based on the market price of our common stock.

Applying the exchange ratio, the former Oruka securityholders immediately before the Merger are expected to own approximately 97.61% of the aggregate number of shares of the combined company’s capital stock following the Merger (on a fully-diluted basis), and our securityholders immediately before the Merger are expected to own approximately 2.39% of the aggregate number of shares of the combined company’s capital stock following the Merger (on a fully-diluted basis), subject to certain assumptions, including, but not limited to, our net cash as of closing being equal to $5.0 million. In the event our net cash is below $5.0 million, the exchange ratio will be adjusted such that the number of shares issued to Oruka’s pre-closing securityholders will be increased, and our stockholders will own a smaller percentage of the combined company following the consummation of the Merger.

Any changes in the market price of our stock before the completion of the First Merger will not affect the number of shares Oruka stockholders will be entitled to receive pursuant to the Merger Agreement. Therefore, if before the completion of the First Merger, the market price of our common stock increases from the market price on the date of the Merger Agreement, then Oruka stockholders

could receive merger consideration with substantially more value for their shares of Oruka capital stock than the parties had negotiated when they established the exchange ratio. Similarly, if before the completion of the First Merger the market price of our common stock declines from the market price on the date of the Merger Agreement, then Oruka stockholders could receive merger consideration with substantially lower value. The Merger Agreement does not include a price-based termination right.

The issuance of our common stock, including the shares of our common stock issuable upon conversion of ARCA Series B Preferred Stock, to Oruka stockholders pursuant to the Merger Agreement and the resulting change in control from the First Merger must be approved by our stockholders, and the Merger Agreement and transactions contemplated thereby must be approved by the Oruka stockholders. Failure to obtain these approvals would prevent the closing of the Merger.

Before the Merger can be completed, our stockholders must approve, among other things, the issuance of our common stock, including shares of our common stock issuable upon conversion of our Series B non-voting convertible preferred stock (“Series B Preferred Stock”), to Oruka stockholders pursuant to the Merger Agreement and the resulting change in control from the First Merger, and Oruka stockholders must adopt the Merger Agreement and approve the Merger and the related transactions. Failure to obtain the required stockholder approvals may result in a material delay in, or the abandonment of, the Merger. Any delay in completing the Merger may materially adversely affect the timing and benefits that are expected to be achieved from the Merger.

The Merger may be completed even though a material adverse effect may result from the announcement of the Merger, industry-wide changes or other causes.

In general, neither we nor Oruka is obligated to complete the Merger if there is a material adverse effect affecting the other party between April 3, 2024, the date of the Merger Agreement, and the closing of the Merger. However, certain types of causes are excluded from the concept of a “material adverse effect.” Such exclusions include, but are not limited to, changes in general economic or political conditions, industry-wide changes, changes resulting from the announcement of the Merger, natural disasters, pandemics, other public health events or force majeure events and changes in U.S. generally accepted accounting principles. Therefore, if any of these events were to occur and adversely affect us or Oruka, the other party would still be obliged to consummate the closing of the Merger notwithstanding such material adverse effect. If any such adverse effects occur and we consummate the closing of the Merger, the stock price of the combined company may suffer. This in turn may reduce the value of the Merger to the stockholders of ARCA, Oruka or both.

If the Merger is not completed, our stock price may decline significantly.

The market price of our common stock is subject to significant fluctuations. Market prices for securities of pharmaceutical, biotechnology and other life science companies have historically been particularly volatile. In addition, the market price of our common stock will likely be volatile based on whether stockholders and other investors believe that we can complete the Merger or otherwise raise additional capital to support our operations if the Merger is not consummated and another strategic transaction cannot be identified, negotiated and consummated in a timely manner, if at all. The volatility of the market price of our common stock has been and may be exacerbated by low trading volume. Additional factors that may cause the market price of our common stock to fluctuate include:

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the entry into, or termination of, key agreements, including commercial partner agreements;

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

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the loss of key employees;

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future sales of our common stock;

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general and industry-specific economic conditions that may affect our research and development expenditures; and

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period-to-period fluctuations in financial results.

Moreover, the stock markets in general have experienced substantial volatility that has often been unrelated to the operating performance of individual companies. These broad market fluctuations may also adversely affect the trading price of our common stock. In the past, following periods of volatility in the market price of a company’s securities, stockholders have often instituted class action securities litigation against such companies.

On April 3, 2024, Oruka entered into, and on July 3, 2024 amended and restated, a subscription agreement (as amended and restated, the “Subscription Agreement”) with certain investors, including existing investors of Oruka, pursuant to which the investors agreed to purchase, in the aggregate, $275.0 million (which includes $25.0 million of proceeds previously received from the issuance of the

Convertible Note and accrued interest on such note) in shares of common stock and pre-funded warrants of Oruka immediately prior to the closing of the Merger, referred to as the Oruka pre-closing financing. The closing of the Oruka pre-closing financing is conditioned upon the satisfaction or waiver of the conditions to the closing of the Merger as well as certain other conditions. The shares of Oruka common stock and pre-funded warrants issued in the Oruka pre-closing financing will result in dilution to all securityholders of the combined company (i.e., both our pre-Merger securityholders and former Oruka securityholders). Furthermore, pursuant to the amended and restated offer letter agreement between Oruka and Lawrence Klein, Oruka is obligated to issue additional options to purchase shares of Oruka common stock in order to maintain Dr. Klein’s ownership in Oruka at approximately 5.0% on a fully-diluted basis (the “Target Ownership Percentage”) until Oruka has raised an aggregate of $200.0 million (the “Covered Limit”). As a result, Oruka expects to issue Dr. Klein warrants of Oruka in full satisfaction of such obligation to maintain his ownership in Oruka at the Target Ownership Percentage concurrently with the closing of the Oruka pre-closing financing up to the Covered Limit. Such warrants granted will result in further dilution to all securityholders of the combined company.

Additional financing may not be available to the combined company when it is needed or may not be available on favorable terms. To the extent that the combined company raises additional capital by issuing equity securities, such financing will cause additional dilution to all securityholders of the combined company, including our pre-Merger securityholders and Oruka’s former securityholders. It is also possible that the terms of any new equity securities may have preferences over the combined company’s common stock. Any debt financing the combined company enters into may involve covenants that restrict its operations. These restrictive covenants may include limitations on additional borrowing and specific restrictions on the use of the combined company’s assets, as well as prohibitions on its ability to create liens, pay dividends, redeem its stock or make investments. In addition, if the combined company raises additional funds through licensing arrangements, it may be necessary to grant licenses on terms that are not favorable to the combined company.

In addition, as a result of our assumption of the Paragon Option Agreements in connection with the Merger, the combined company will be subject to the obligation to grant to Paruka, on each of December 31, 2024 and December 31, 2025, warrants to purchase a number of shares equal to 1.00% of the outstanding shares of our common stock as of the date of the grant on a fully-diluted basis, with an exercise price equal to the fair market value of the underlying shares on the grant date. Such warrants granted will result in further dilution to all securityholders of the combined company.

Transfers of the combined company’s securities utilizing Rule 144 of the Securities Act may be limited.

A significant portion of the combined company’s securities will be restricted from immediate resale. Holders should be aware that transfers of the combined company’s securities pursuant to Rule 144 may be limited as Rule 144 is not available, subject to certain exceptions, for the resale of securities initially issued by shell companies (other than business combination related shell companies) or issuers that have been at any time previously a shell company. Our expected disposal of our historical assets and operations in connection with the Merger with Oruka will make it a shell company. We anticipate that following the consummation of the Merger, the combined company will no longer be a shell company. As a result, we anticipate that holders will not be able to sell their restricted combined company securities pursuant to Rule 144 without registration until one year after we file the Current Report on Form 8-K following the closing that includes the required Form 10 information that reflects that the combined company is no longer a shell company.

We have two remaining ongoing development programs, Gencaro and rNAPc2, and we will dispose of (or is in the process of disposing of) our legacy technology and intellectual property, including those related to Gencaro and rNAPc2. Any such disposal of legacy technology and intellectual property will be contingent upon obtaining stockholder approval for the Merger. As such, we expect to become a shell company upon consummation of the Merger, and our Merger with Oruka would be subject to the requirements applicable to shell company business combinations; provided, however, that if the Merger is not consummated, the disposal of our legacy technology and intellectual property is not expected to occur and we would therefore not expect to become a shell company.

The requirements applicable to shell company business combinations are as follows:

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the combined company will need to file a Form 8-K to report the Form 10 type information after closing with the SEC reflecting its status as an entity that is not a shell company;

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we are not, and the combined company will not be, eligible to use a Form S-3 until 12 full calendar months after closing;

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the combined company will need to wait at least 60 calendar days after closing to file a Form S-8 for any equity plans or awards;

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the combined company will be an “ineligible issuer” for three years following the closing, which will prevent the combined company from (i) incorporating by reference in its Form S-1 filings, (ii) using a free writing prospectus, or (iii) taking advantage of well-known seasoned issuer status despite its public float;

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investors who (i) are affiliates of Oruka at the time the Merger is submitted for the vote or consent of Oruka stockholders, (ii) receive securities of the combined company in the Merger (i.e., Rule 145(c) securities) and (iii) publicly offer or sell such securities, will be deemed to be engaged in a distribution of such securities, and therefore to be underwriters with respect to resales of those securities, and accordingly such securities may not be included in the Form S-1 resale registration statement anticipated to be filed after the closing of the Merger unless such securities are sold only in a fixed price offering in which such investors are named as underwriters in the prospectus;

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Rule 144(i)(2) will limit the ability to publicly resell Rule 145(c) securities per Rule 145(d), as well as any other “restricted” or “control” securities of the combined company per Rule 144 (i.e., holders of restricted securities and any affiliates of the public company are also affected) until one year after the Form 10 information is filed with the SEC.

The foregoing SEC requirements would increase the combined company’s time and cost of raising capital, offering stock under equity plans, and complying with securities laws. Further, such requirements will add burdensome restrictions on the resale of combined company shares by affiliates of Oruka and any holders of “restricted” or “control” securities.

Our and Oruka’s directors and executive officers may have interests in the Merger that are different from, or in addition to, the interests of other of our stockholders generally. These interests with respect to our directors and executive officers may include, among others, retention bonus payments, extension of exercisability periods of previously issued stock option grants, severance payments if employment is terminated in a qualifying termination in connection with the Merger and rights to continued indemnification, expense advancement and insurance coverage.

Further, certain current members of Oruka’s board of directors will continue as directors of the combined company after the effective time, and, following the closing of the Merger, will be eligible to be compensated as non-employee directors of the combined company pursuant to our non-employee director compensation policy that is expected to remain in place following the effective time.

Our board of directors was aware of and considered those interests, among other matters, in reaching their decisions to approve and adopt the Merger Agreement, approve the Merger, and recommend the approval of the Merger Agreement to our and Oruka stockholders. These interests, among other factors, may have influenced the directors and executive officers of each company to support or approve the Merger.

If the combined company is unable to realize the full strategic and financial benefits currently anticipated from the Merger, our stockholders and Oruka stockholders will have experienced substantial dilution of their ownership interests without receiving any commensurate benefit, or only receiving part of the commensurate benefit to the extent the combined company is able to realize only part of the strategic and financial benefits currently anticipated from the Merger.

Our securityholders will generally have a reduced ownership and voting interest in, and will exercise less influence over the management of, the combined company following the completion of the Merger as compared to their current ownership and voting interests in the respective companies.

After the completion of the Merger, our current stockholders will generally own a smaller percentage of the combined company than their ownership of our company prior to the Merger. Immediately after the Merger, our stockholders as of immediately prior to the Merger are expected to own approximately 2.39% of the outstanding shares of capital stock of the combined company (on a fully-diluted basis), and former holders of Oruka securities are expected to own approximately 97.61% of the outstanding shares of capital stock of the combined company (on a fully-diluted basis), subject to certain assumptions, including, but not limited to, our net cash as of closing being equal to $5.0 million. The Chief Executive Officer of Oruka will serve as the Chief Executive Officer of the combined company following the completion of the Merger.

Certain provisions of the Merger Agreement may discourage third parties from submitting competing proposals, including proposals that may be superior to the transactions contemplated by the Merger Agreement.

While the Merger Agreement is in effect, each party is generally prohibited from, among other things, soliciting, initiating or knowingly encouraging, inducing or facilitating the communication, making, submission or announcement of any acquisition proposal or acquisition inquiry. In addition, our current directors and executive officers and certain significant stockholders have entered into support agreements pursuant to the terms of the Merger Agreement, and as an inducement to Oruka’s willingness to enter into the Merger Agreement, by which they have agreed to vote all of their shares of our capital stock in favor of the Merger Agreement and the transactions contemplated thereby and against any competing proposals, subject to certain limited exceptions. These provisions could

discourage a potential competing acquirer from considering or proposing an acquisition or merger, even if it were prepared to pay consideration with a higher value than that implied by the merger consideration in the combination.

Because the lack of a public market for Oruka common stock makes it difficult to evaluate the fair market value of its capital stock, the value of our common stock to be issued to Oruka stockholders may be more or less than the fair market value of Oruka common stock.

The outstanding capital stock of Oruka is privately held and is not traded on any public market. The lack of a public market makes it difficult to determine the fair market value of Oruka capital stock. Because the percentage of our equity to be issued to Oruka stockholders was determined based on negotiations between the parties, it is possible that the value of our common stock and Series B Preferred Stock to be issued to Oruka stockholders will be more or less than the fair market value of Oruka capital stock.

Lawsuits may be filed against us, Oruka, or any of the members of our respective boards of directors arising out of the Merger, which may delay or prevent the Merger.

Putative stockholder complaints, including stockholder class action complaints, and other complaints may be filed against us, our board of directors, Oruka, the Oruka board of directors and others in connection with the transactions contemplated by the Merger Agreement. The outcome of litigation is uncertain, and we or Oruka may not be successful in defending against any such future claims. Lawsuits that may be filed against us, our board of directors, Oruka, or the Oruka board of directors could delay or prevent the Merger, divert the attention of our and Oruka’s management and employees from their day-to-day business and otherwise adversely affect us and Oruka financially.

As of the date of this filing, one complaint has been filed by a purported ARCA stockholder against us and our board of directors in connection with the proposed Merger. On May 20, 2024, a purported stockholder filed a complaint, captioned Wynter v. ARCA biopharma, Inc., et al., No.: 1:24-cv-1418-STV (D. Colo.) (the “Complaint”), against us and our board of directors. The Complaint alleges that the defendants filed or caused to be filed a materially incomplete and misleading preliminary registration statement with the SEC and asserts claims under Sections 14(a) and 20(a) of the Exchange Act. The Complaint seeks an order enjoining the proposed Merger, or in the event that the proposed Merger is consummated, an order rescinding the Merger or awarding rescissory damages, as well as costs, including attorneys’ and experts’ fees. We cannot predict the outcome of the Complaint. We believe that the allegations and claims asserted in the Complaint are without merit and intend to defend against them vigorously. Additional lawsuits arising out of the Merger may be filed.

We have never paid and, other than in connection with the Merger with Oruka, do not intend to pay any cash dividends in the foreseeable future.

We have never paid cash dividends on any of our capital stock. Pursuant to the terms of the Merger Agreement, we may declare and pay a special cash dividend to our stockholders of record prior to the Merger consisting of cash up to an amount equal in the aggregate of the amount by which our net cash will exceed $5.0 million. The amount of such special cash dividend is currently uncertain, pending the determination of our outstanding obligations and net cash position as of the closing of the Merger. Other than such potential special cash dividend in connection with the closing of the Merger, we do not currently anticipate declaring or paying cash dividends on our capital stock in the foreseeable future.

If we do not successfully consummate the Merger or another strategic transaction, our board of directors may decide to pursue a dissolution and liquidation of ARCA. In such an event, the amount of cash available for distribution to our stockholders will depend heavily on the timing of such liquidation as well as the amount of cash that will need to be reserved for commitments and contingent liabilities, as to which we can give you no assurance.

There can be no assurance that the Merger will be completed. If the Merger is not completed, our board of directors may decide to pursue a dissolution and liquidation of ARCA. In such an event, the amount of cash available for distribution to our stockholders will depend heavily on the timing of such decision and, ultimately, such liquidation, since the amount of cash available for distribution continues to decrease as we fund our operations while pursuing the Merger. In addition, if our board of directors were to approve and recommend, and our stockholders were to approve, a dissolution and liquidation of ARCA, we would be required under Delaware law to pay our outstanding obligations, as well as to make reasonable provision for contingent and unknown obligations, prior to making any distributions in liquidation to stockholders. Our commitments and contingent liabilities may include obligations under our employment and related agreements with certain employees that provide for severance and other payments following a termination of employment occurring for various reasons, including a change in control of ARCA, litigation against us, and other various claims and legal actions arising in the ordinary course of business, and other unexpected and/or contingent liabilities. As a result of this requirement, a portion of our assets would need to be reserved pending the resolution of such obligations.

In addition, we may be subject to litigation or other claims related to a dissolution and liquidation of ARCA. If a dissolution and liquidation were to be pursued, our board of directors, in consultation with our advisors, would need to evaluate these matters and make a determination about a reasonable amount to reserve.

Accordingly, holders of our common stock could lose all or a significant portion of their investment in the event of liquidation, dissolution or winding up of ARCA. A liquidation would be a lengthy and uncertain process with no assurance of any value ever being returned to our stockholders.

We are substantially dependent on our remaining employees to facilitate the consummation of the Merger.

As of June 30, 2024, we had only 3 full-time employees. Our ability to successfully complete the Merger depends in large part on our ability to retain certain remaining personnel. Despite our efforts to retain these employees, one or more employees may terminate their employment with us on short notice. The loss of the services of certain employees could potentially harm our ability to consummate the Merger and run our day-to-day business operations, as well as fulfill our reporting obligations as a public company.

Risks Related to the Proposed Reverse Stock Split

The reverse stock split may not increase our stock price over the long-term.

The principal purposes of the reverse stock split are to (i) increase the per-share market price of common stock above the minimum bid price requirement under the Nasdaq rules so that the listing of ARCA and the shares of our common stock being issued in the Merger on Nasdaq will be approved and (ii) increase the number of authorized and unissued shares available for future issuance in connection with the Merger, though such increase will not alone be sufficient to complete the Merger. It cannot be assured, however, that the reverse stock split will accomplish any increase in the per-share market price of our common stock for any meaningful period of time. While it is expected that the reduction in the number of outstanding shares of our common stock will proportionally increase the market price of our common stock, it cannot be assured that the reverse stock split will increase the market price of our common stock by a multiple of the reverse stock split ratio mutually agreed by us and Oruka, or result in any permanent or sustained increase in the market price of our common stock, which is dependent upon many factors, including our business and financial performance, general market conditions and prospects for future success. Thus, while the stock price of our common stock might meet the listing requirements for Nasdaq initially after the reverse stock split, it cannot be assured that it will continue to do so.

The reverse stock split may decrease the liquidity of our common stock.

Although our board of directors believes that the anticipated increase in the market price of our common stock resulting from the proposed reverse stock split could encourage interest in its common stock and possibly promote greater liquidity for its stockholders, such liquidity could also be adversely affected by the reduced number of shares outstanding after the reverse stock split. The reduction in the number of outstanding shares may lead to reduced trading and a smaller number of market makers for our common stock. In addition, the reverse stock split may not result in an increase in our stock price necessary to satisfy Nasdaq’s initial listing requirements for the combined company.

The reverse stock split may lead to a decrease in our overall market capitalization.

Should the market price of our common stock decline after the reverse stock split, the percentage decline will be greater, due to the smaller number of shares outstanding, than it would have been prior to the reverse stock split. A reverse stock split is often viewed negatively by the market and, consequently, can lead to a decrease in the combined company’s overall market capitalization. If the per share market price does not increase in proportion to the reverse stock split ratio, then our value, as measured by our stock capitalization, will be reduced. In some cases, the per-share stock price of companies that have effected reverse stock splits subsequently declined back to pre-reverse split levels, and accordingly, it cannot be assured that the total market value of our common stock will remain the same after the reverse stock split is effected, or that the reverse stock split will not have an adverse effect on our stock price due to the reduced number of shares outstanding after the reverse stock split.

Risks Related to ARCA

Risks Related to Our Business and Financial Condition

If we are not able to successfully develop, obtain FDA approval for, and provide for the commercialization of Gencaro or rNAPc2 in a timely manner, we may not be able to continue our business operations.

We currently have no products that have received regulatory approval for commercial sale. The process to develop, obtain regulatory approval for and commercialize potential product candidates is long, complex and costly.

Failure to demonstrate that a product candidate, including Gencaro or rNAPc2, is safe and effective, or significant delays in demonstrating such safety and efficacy, would adversely affect our business. Failure to obtain marketing approval of Gencaro or rNAPc2 from appropriate regulatory authorities, or significant delays in obtaining such approval, would also adversely affect our business and could, among other things, preclude us from completing a strategic transaction or obtaining additional financing necessary to continue as a going concern.

Even if approved for sale, a product candidate must be successfully commercialized to generate value. We do not currently have the capital resources or management expertise to commercialize Gencaro, rNAPc2 or any of our other product candidates and, as a result, will need to complete a strategic transaction, or, alternatively, raise substantial additional funds to enable commercialization of Gencaro, rNAPc2 or any of our other product candidates, if approved. Failure to successfully provide for the commercialization of Gencaro, rNAPc2 or any other product candidate, if approved, would damage our business.

If we encounter difficulties enrolling patients in our future clinical trial of Gencaro, any potential enrollment milestones or potential regulatory approvals could be delayed or otherwise adversely affected.

We may encounter difficulty enrolling a sufficient number of patients in our clinical trials, due to circumstances which are outside our control, including other clinical trials that may limit the availability of study participants. As a result, we may need to delay or terminate our trial, which would have a negative impact on our business. Delays in enrolling patients in the clinical trial would also adversely affect our ability to meet projected enrollment milestones or timelines for completing the study and obtaining regulatory approval.

Our clinical trials from our product candidates may not yield results that will enable us to further develop our products as a therapy and obtain regulatory approvals necessary to be used as a drug.

We will receive regulatory approval for our product candidates only if we can demonstrate, in carefully designed and conducted clinical trials, that the product candidate is safe and effective. We do not know whether any future clinical trials for Gencaro, rNAPc2 or any other product candidate will demonstrate sufficient safety and efficacy to obtain the requisite regulatory approvals or will result in marketable products.

The results from preclinical testing and early clinical trials may not be predictive of results from later studies. We may suffer significant setbacks in advanced clinical trials, even after seeing promising results in earlier studies. Based on results at any stage of clinical trials, we may decide to repeat or redesign a trial or discontinue development of one or more of our product candidates. If we fail to adequately demonstrate the safety and efficacy of our product candidates, we will not be able to obtain the required regulatory approvals to commercialize those product candidates, and our business, results of operations and financial condition would be materially adversely affected.

In addition, administering our product candidates to humans may produce undesirable side effects. These side effects could interrupt, delay or halt clinical trials of our product candidates, and could result in the FDA or other regulatory authorities denying approval of our product candidates, for any or all targeted indications.

We may not achieve our projected development goals in the time frames we announce and expect.

We set goals for, and make public statements regarding, the timing of certain accomplishments, such as the initiation of our clinical trials, the steps for commencing and continuing our clinical trials, the disclosure of trial results, the obtainment of regulatory approval and the sale of drug products, which we sometimes refer to as milestones. These milestones may not be achieved, and the actual timing of these events can vary dramatically due to a number of factors such as delays or failures in our clinical trials, disagreements with any collaborative partners, the uncertainties inherent in the regulatory approval process and manufacturing scale-up, delays in achieving manufacturing or marketing arrangements sufficient to commercialize our products or our inability to obtain sufficient financing in a timely manner. There can be no assurance that we will make regulatory submissions or receive regulatory approvals as planned. If we fail to achieve one or more of these milestones as planned, our business will be materially adversely affected.

We expect a Phase 3 PRECISION-AF clinical trial will require substantially more capital, and we cannot guarantee when or if we will be able to secure such additional financing.

We will need to secure additional financing in order to initiate enrollment of our Phase 3 PRECISION-AF clinical trial. Even if we can begin enrolling patients, we expect to have to raise significant additional capital to continue enrollment. If we are not able to obtain financing in the future or on acceptable terms, we may have to terminate the clinical trial early, which could adversely affect our business.

We will need to raise substantial additional funds through public or private equity or debt transactions and/or complete one or more strategic transactions or partnerships, to continue development of Gencaro, rNAPc2 or any of our other product candidates. If we are unable to raise such financing or complete such a transaction, we may not be able to continue operations.

As a result of the expected development timeline to potentially obtain FDA approval for Gencaro or rNAPc2, if at all, the substantial additional costs associated with the development of our product candidates, including the costs associated with clinical trials related thereto, and the substantial cost of commercializing Gencaro or rNAPc2, if approved, we will need to raise substantial additional funding through public or private equity or debt transactions or a strategic combination or partnership. If we are delayed in obtaining funding or are unable to complete a strategic transaction, we may discontinue our development activities on Gencaro, rNAPc2 and our other product candidates or discontinue our operations. Even if we are able to fund continued development of Gencaro, rNAPc2 or any of our other product candidates, we expect that we will need to complete a strategic transaction or raise substantial additional funding through public or private equity or debt securities or partnership to successfully commercialize Gencaro, rNAPc2 or any other product candidate.

We believe our cash and cash equivalents as of June 30, 2024 will be sufficient to fund our operations through the end of fiscal year 2025. Our future viability beyond that point is dependent on the results of the strategic review process and our ability to raise additional capital to fund our operations. We expect to continue to incur costs and expenditures in connection with the process of evaluating strategic alternatives. There can be no assurance, however, that we will be able to successfully consummate any particular strategic transaction, including the Merger Agreement. The process of continuing to evaluate these strategic options may be very costly, time-consuming and complex and we have incurred, and may in the future incur, significant costs related to this continued evaluation, such as legal, accounting and advisory fees and expenses and other related charges, see discussion above regarding the Merger Agreement and special dividend payment. Should we pursue additional clinical trials for our product candidates, we will have to raise additional capital for clinical trials of Gencaro. We may not be able to raise sufficient capital on acceptable terms, or at all, to continue development of Gencaro or rNAPc2 or to otherwise continue operations and may not be able to execute any strategic transaction. Our Merger Agreement discussed above may impact this projection. Conducting a Phase 3 PRECISION-AF trial would likely require additional financing, subject to our pursuit of a potential strategic transaction and the consummation of such potential transaction. However, changing circumstances may cause us to consume capital significantly faster or slower than currently anticipated. We have based these estimates on assumptions that may prove to be wrong, and we could exhaust our available financial resources sooner than we currently anticipate; therefore, we may have to raise additional capital for other clinical trials. Initiating any Phase 3 clinical trial of Gencaro will require additional financing. In 2020, we entered into a new sales agreement with a placement agent to sell, from time to time, our common stock in an “at the market offering.” As of December 31, 2022, we sold an aggregate of 9,928,272 shares of our common stock pursuant to the terms of such sales agreement for aggregate gross proceeds of approximately $54.0 million. Net proceeds received in this offering were approximately $52.2 million, after deducting expenses for executing the “at the market offering” and commissions paid to the placement agent. In 2021, we amended the new sales agreement and the amount available for the offering under our prospectus to our registration statement on Form S-3 (No. 333-254585), which expired in March 2024. In April 2024, we terminated such sales agreement in accordance with its terms. Sales of our common stock dilute the ownership interest of our stockholders and may cause the price per share of our common stock to decrease. Changing circumstances may cause us to consume capital significantly faster or slower than we currently anticipate. We have based these estimates on assumptions that may prove to be wrong, and we could exhaust our available financial resources sooner than we currently anticipate.

Our liquidity, and our ability to raise additional capital or complete any strategic transaction, depends on a number of factors, including, but not limited to, the following:

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the timing and outcome of the strategic review process;

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the consummation of any particular strategic transactions, including the Merger;

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the costs and timing for potential additional clinical trials in order to gain possible regulatory approval for Gencaro, rNAPc2 and our other product candidates;

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the market price of our stock and the availability and cost of additional equity capital from existing and potential new investors;

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our ability to retain the listing of our common stock on the Nasdaq Capital Market;

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our ability to control costs associated with our operations;

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the costs of filing, prosecuting, defending and enforcing any patent claims and other intellectual property rights; and

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the terms and conditions of our existing collaborative and licensing agreements.

The sale of additional equity or convertible debt securities would likely result in substantial dilution to our stockholders. If we raise additional funds through the incurrence of indebtedness, the obligations related to such indebtedness would be senior to rights of holders of our capital stock and could contain covenants that would restrict our operations. We also cannot predict what consideration might be available, if any, to us or our stockholders, in connection with any strategic transaction. Should strategic alternatives or additional capital not be available to us, or not be available on acceptable terms, we may be unable to realize value from our assets and discharge our liabilities in the normal course of business which may, among other alternatives, cause us to further delay, substantially reduce or discontinue operational activities to conserve our cash resources.

We have received a Special Protocol Assessment agreement from the FDA relating to our planned Phase 3 program for Gencaro. This Special Protocol Assessment agreement does not guarantee approval of Gencaro or any other particular outcome from regulatory review.

In 2019, we received a Special Protocol Assessment (“SPA”) agreement from the FDA for our planned Phase 3 clinical trial of Gencaro. The FDA’s SPA process is designed to facilitate the FDA’s review and approval of drugs by allowing the FDA to evaluate the proposed design and size of certain clinical trials that are intended to form the primary basis for determining a drug product’s efficacy. Upon specific request by a clinical trial sponsor, the FDA will evaluate the protocol and respond to a sponsor’s questions regarding, among other things, primary efficacy endpoints, trial conduct and data analysis, within 45 days of receipt of the request. The FDA ultimately assesses whether the protocol design and planned analysis of the trial are acceptable to support regulatory approval of the product candidate with respect to the effectiveness of the indication studied. All agreements and disagreements between the FDA and the sponsor regarding a SPA must be clearly documented in a SPA letter or the minutes of a meeting between the sponsor and the FDA.

However, an SPA agreement does not guarantee approval of a product candidate, even if the trial is conducted in accordance with the protocol. Moreover, the FDA may revoke or alter our SPA agreement in certain circumstances. In particular, a SPA agreement is not binding on the FDA if public health concerns emerge that were unrecognized at the time of the SPA agreement, other new scientific concerns regarding product safety or efficacy arise, we fail to comply with the agreed upon trial protocols, or the relevant data, assumptions or information provided by us in our request for the SPA change or are found to be false or omit relevant facts. In addition, even after an SPA agreement is finalized, the SPA agreement may be modified, and such modification will be deemed binding on the FDA review division, except under the circumstances described above, if the FDA and the sponsor agree in writing to modify the protocol and such modification is intended to improve the study. The FDA retains significant latitude and discretion in interpreting the terms of the SPA agreement and the data and results from any study that is the subject of the SPA agreement.

Even though we obtained an agreement on our SPA, we cannot assure you that our planned Phase 3 clinical trial will succeed, will be deemed binding by the FDA under our SPA agreement, or will result in any FDA approval for Gencaro. We may also alter the design of the trial to focus on endpoints that are not covered by the SPA. Moreover, if the FDA revokes or alters its agreement under our SPA, or interprets the data collected from the clinical trial differently than we do, the FDA may not deem the data sufficient to support an application for regulatory approval, which could materially adversely affect our business, financial condition and results of operations.

If we are not able to maintain the requirements for listing on the Nasdaq Capital Market, we could be delisted, which could have a material adverse effect on our ability to consummate the Merger, raise additional funds as well as the price and liquidity of our common stock.

Our common stock is currently listed on the Nasdaq Capital Market. To maintain the listing of our common stock on the Nasdaq Capital Market we are required to meet certain listing requirements, including, among others, (i) a minimum closing bid price of $1.00 per share, (ii) a market value of publicly held shares (excluding shares held by our executive officers, directors and 10% or more stockholders) of at least $1 million and (iii) either: (x) stockholders’ equity of at least $2.5 million; or (y) a total market value of listed securities of at least $35 million. In addition, pursuant to the terms of the Merger Agreement we are required to use commercially reasonable efforts to maintain our listing on Nasdaq until the First Effective Time.

We have received three potential delisting notices from Nasdaq since 2012. In each of 2012, 2015 and 2018, we received notification from Nasdaq of potential delisting of our shares from the Nasdaq Capital Market because the closing bid price of our common stock had not met the minimum closing bid price of $1.00 per share during the preceding 30 business days. We subsequently regained compliance with Nasdaq’s minimum closing bid price requirements related to the 2012, 2015 and 2018 notices, by effecting a 1‑for‑6 reverse split of our common stock in March 2013, a 1‑for‑7 reverse split of our common stock in September 2015 and a 1-for-18 reverse split of our common stock in April 2019. Despite effecting a 1-for-18 reverse split of our common stock in April 2019, there can be no assurance that the market price per share of our common stock will remain in excess of the $1.00 minimum bid price for a sustained period of time. The continuing effect of our reverse stock split on the market price of our common stock cannot be predicted with any certainty, and the history of similar stock split combinations for companies in like circumstances is varied. It is possible that the per share price of our common stock after the reverse stock split will not rise in proportion to the reduction in the number of shares of common stock outstanding resulting from the reverse stock split, effectively reducing our market capitalization, and there can be no assurance that the market price per post-reverse split share will either exceed or remain in excess of the $1.00 minimum bid price for a sustained period of time. The market price of our common stock may vary based on other factors that are unrelated to the number of shares outstanding, including our future performance.

The delisting of our common stock from a national exchange may impair our ability to consummate the Merger and could impair the liquidity and market price of the common stock. It could also materially, adversely affect our access to the capital markets, and any limitation on market liquidity or reduction in the price of the common stock as a result of that delisting could adversely affect our ability to consummate the Merger or raise capital on terms acceptable to us, or at all.

In future periods, if we do not meet the minimum stockholders’ equity, minimum closing bid price requirements, or any other listing requirements, we would be subject to delisting from the Nasdaq Capital Market.

As of July 31, 2024, the closing price of our common stock was $3.00 per share, and the total market value of our listed securities was approximately $43.5 million. As of June 30, 2024, we had stockholders’ equity of $32.6 million.

Our financial statements for the quarter ended June 30, 2024 were prepared assuming that we will continue as a going concern. Our management has concluded that due to our need for additional capital, and the uncertainties surrounding our ability to raise such funding, there may be uncertainty about our ability to continue as a going concern in future years.

Our financial statements for the quarter ended June 30, 2024 were prepared assuming that we will continue as a going concern. The going concern basis of presentation assumes that we will continue in operation for the foreseeable future and will be able to realize our assets and discharge our liabilities and commitments in the normal course of business and do not include any adjustments to reflect the possible future effects on the recoverability and classification of assets or the amounts and classification of liabilities that may result from our inability to continue as a going concern. As of December 31, 2019, our management and our independent registered public accounting firm concluded that, due to our need for additional capital and the uncertainties surrounding our ability to raise such funding, substantial doubt existed as to our ability to continue as a going concern for a period from one year after our annual financial statements had been issued. We believe our cash and cash equivalents as of June 30, 2024 will be sufficient to fund our operations through the end of fiscal year 2025. Our future viability beyond that point is dependent on the results of the strategic review process and our ability to raise additional capital to fund our operations. We expect to continue to incur costs and expenditures in connection with the process of evaluating strategic alternatives. There can be no assurance, however, that we will be able to successfully consummate any particular strategic transaction, including the Merger Agreement. The process of continuing to evaluate these strategic options may be very costly, time-consuming and complex and we have incurred, and may in the future incur, significant costs related to this continued evaluation, such as legal, accounting and advisory fees and expenses and other related charges, see discussion above regarding the Merger Agreement and special dividend payment. Should we pursue additional clinical trials for our product candidates, we will have to raise additional capital for clinical trials of Gencaro. We may not be able to raise sufficient capital on acceptable terms, or at all, to continue development of Gencaro or rNAPc2 or to otherwise continue operations and may not be able to execute any strategic transaction. Our Merger Agreement discussed above may impact this projection. Conducting a Phase 3 PRECISION-AF trial would likely require additional financing, subject to our pursuit of a potential strategic transaction and the consummation of such potential transaction. However, changing circumstances may cause us to consume capital significantly faster or slower than currently anticipated. We have based these estimates on assumptions that may prove to be wrong, and we could exhaust our available financial resources sooner than we currently anticipate; therefore, we may have to raise additional capital for other clinical trials. Initiating any Phase 3 clinical trial of Gencaro will require additional financing. We cannot be certain that we will be able to make any other sale of our common stock in any future offering to cover our future capital needs, or at all. Changing circumstances may cause us to consume capital significantly faster or slower than we currently anticipate. If we are delayed in completing or are unable to complete additional funding and/or a strategic transaction, we may discontinue our development activities or operations, but there are no assurances that these reductions would be sufficient to allow us to continue to operate as a going concern. Therefore, even if we resolve this uncertainty, our independent registered public accountants and/or management could conclude that uncertainty as to our ability to continue as a going concern could exist at a future date.

We have based these estimates on assumptions that may prove to be wrong, and we could exhaust our available financial resources sooner than we currently anticipate. We may be forced to reduce our operating expenses and raise additional funds to meet our working capital needs, principally through the additional sales of our securities or debt financings. However, we cannot guarantee that we will be able to obtain sufficient additional funds when needed or that such funds, if available, will be obtainable on satisfactory terms. If we are unable to raise sufficient additional capital or complete a strategic transaction, we may be unable to continue to fund our operations, develop Gencaro, rNAPc2 or our other product candidates, or realize value from our assets and discharge our liabilities in the normal course of business. If we cannot raise sufficient funds, we may have to liquidate our assets, and might realize significantly less than the values at which they are carried on our financial statements, and stockholders may lose all or part of their investment in our securities.

Market conditions and changing circumstances, some of which may be beyond our control, could impair our ability to access our existing cash, cash equivalents and investments and to timely pay key vendors and others. For example, on March 10, 2023, Silicon Valley Bank (SVB), where we maintain certain accounts, was placed into receivership with the Federal Deposit Insurance Corporation (FDIC), which resulted in all funds held at SVB being temporarily inaccessible by SVB’s customers. If other banks and financial institutions with whom we have banking relationships enter receivership or become insolvent in the future, we may be unable to access, and we may lose, some or all of our existing cash, cash equivalents and investments to the extent those funds are not insured or otherwise protected by the FDIC. In addition, in such circumstances we might not be able to timely pay key vendors and others. We regularly maintain cash balances that are not insured or are in excess of the FDIC’s insurance limit. Any delay in our ability to access our cash, cash equivalents and investments (or the loss of some or all of such funds) or to timely pay key vendors and others could have a material adverse effect on our operations and cause us to need to seek additional capital sooner than planned.

Our business could be adversely affected by the effects of health epidemics in regions where we or third parties on which we rely may have clinical trial sites or other business operations.

Our business could be adversely affected by health epidemics in regions where we may have concentrations of future clinical trial sites or other business operations.

In addition, third-party manufacturing of our drug product candidates and suppliers of the materials used in the production of our drug product candidates may be impacted by significant delays or restrictions resulting from any future health epidemic which may disrupt our supply chain or limit our ability to manufacture drug product candidates for our clinical trials.

The ultimate impact of any future health epidemic is highly uncertain and subject to change. These effects could have a material impact on our operations.

If we encounter difficulties enrolling patients in any future clinical trials, our future trials could be delayed or otherwise adversely affected.

If we have difficulty enrolling a sufficient number of patients in any future clinical trial, we may need to delay or terminate our trial, which would have a negative impact on our business. Delays in enrolling patients in any future clinical trials would also adversely affect our ability to generate any product, milestone and royalty revenues under collaboration agreements, if any, and could impose significant additional costs on us or on any future collaborators.

For example, the development of vaccines for the SARS-CoV-2 virus and the development of other therapies for COVID-19 disease impacted our ability to enroll patients in our rNAPc2 (AB201) Phase 2b clinical trial and such enrollment was slower than expected.

The GENETIC-AF clinical trial required that we identify and enroll a large number of patients with the condition under investigation and the trial enrolled only those patients having a specific genotype, and certain patients who have or are willing to have a Medtronic device implanted for monitoring and recording AFB data. As a result, enrollment for GENETIC-AF was slower than expected, with our first patient enrolled in June 2014 and enrollment completed in August 2017. Because of the rigorous enrollment criteria, our clinical trial timelines were delayed from our original projections. We anticipate that any future Phase 3 clinical trial of Gencaro, including PRECISION-AF, may have similar enrollment criteria, and we cannot guarantee that we will not have similar enrollment issues in any future clinical trials.

We may also encounter difficulty enrolling a sufficient number of patients in any future clinical trial, due to circumstances which are outside our control, including as a result of continued hostilities between Russia and Ukraine and Hamas' attack against Israel and the ensuing conflict.

We will rely on contract research organizations to conduct substantial portions of our clinical trials, including any future clinical trial of Gencaro, rNAPc2, and as a result, we will be unable to directly control the timing, conduct and expense of all aspects of our clinical trials.

We do not currently have sufficient staff with the requisite experience to conduct our clinical trials and therefore will rely on third parties to conduct certain aspects of any future clinical trials. We previously contracted with a CRO to conduct components of our GENETIC-AF clinical trial and anticipate contracting with a CRO to conduct components of any future clinical trial for Gencaro and components of the clinical study of rNAPc2 or any future clinical trials for our other product candidates. As a result, we will have less control over many details and steps of any clinical trial, the timing and completion of any clinical trial, the required reporting of adverse events and the management of data developed through any clinical trial than would be the case if we were relying entirely upon our own staff. Communicating with outside parties can also be challenging, potentially leading to mistakes as well as difficulties in coordinating activities. Outside parties, such as CROs, may have staffing difficulties, may undergo changes in priorities or may become financially distressed, adversely affecting their willingness or ability to conduct our clinical trial. We may experience unexpected cost increases that are beyond our control. Problems with the timeliness or quality of the work of a CRO may lead us to seek to terminate the relationship and use an alternative service provider. However, making any change may be costly and may delay ongoing trials, if any, and contractual restrictions may make such a change difficult or impossible. Additionally, it may be impossible to find a replacement organization that can conduct clinical trials in an acceptable manner and at an acceptable cost.

Even though we anticipate relying on CROs in the future, we will likely have to devote substantial resources and rely on the expertise of our employees to manage the work being done by the CROs. Due to our limited experience in managing clinical trials, we cannot guarantee our employees will do so effectively.

We expect to depend on existing and future collaborations with third parties for the development of some of our product candidates. If those collaborations are not successful, we may not be able to complete the development of these product candidates.

We collaborated with one or more clinical trial networks in our development program for rNAPc2. As a result, we lacked direct control over certain aspects of the development program and the amount and timing of resources that these collaborators devote to the project.

We had a collaboration agreement with Medtronic that supported our GENETIC-AF clinical trial. If our arrangement with Medtronic, as amended, is continued as part of our future development of Gencaro, we will have limited control over the amount and timing of resources that they dedicate to the development of Gencaro. This is also likely to be true in any future collaboration with third parties and we may seek additional third-party collaborators for the development of Gencaro, rNAPc2 or any other product candidates. Our ability to benefit from these arrangements will depend on our collaborators’ abilities to successfully perform the functions assigned to them in these arrangements.

Collaborations involving our product candidates pose the following risks to us:

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collaborators have significant discretion in determining the efforts and resources that they will apply to these collaborations;

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collaborators may not pursue development and commercialization of our product candidates or may elect not to continue or renew development or commercialization programs based on clinical trial results, changes in the collaborator’s strategic focus or available funding, or external factors such as an acquisition that diverts resources or creates competing priorities;

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collaborators may delay clinical trials, provide insufficient funding for a clinical trial program, stop a clinical trial or abandon a product candidate, repeat or conduct new clinical trials or require a new formulation of a product candidate for clinical testing;

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collaborators could independently develop, or develop with third parties, products that compete directly or indirectly with our product candidates if the collaborators believe that competitive products are more likely to be successfully developed or can be commercialized under terms that are more economically attractive than ours;

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collaborators may not properly maintain or defend our intellectual property rights or may use our proprietary information in such a way as to invite litigation that could jeopardize or invalidate our proprietary information or expose us to potential litigation;

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disputes may arise between the collaborators and us that result in the delay or termination of the research, development or commercialization of our product candidates or that result in costly litigation or arbitration that diverts management attention and resources;

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collaborations may be terminated and, if terminated, may result in a need for additional capital to pursue further development or commercialization of the applicable product candidates;

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collaborators may elect to take over manufacturing rather than retain us as manufacturers and may encounter problems in starting up or gaining approval for their manufacturing facility and so be unable to continue development of product candidates;

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we may be required to undertake the expenditure of substantial operational, financial and management resources in connection with any collaboration;

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we may be required to issue equity securities to collaborators that would dilute our existing stockholders’ percentage ownership;

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we may be required to assume substantial actual or contingent liabilities;

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collaborators may not commit adequate resources to the marketing and distribution of our product candidates, limiting our potential revenues from these products; and

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collaborators may experience financial difficulties.

We face a number of challenges in seeking additional collaborations. Collaborations are complex and any potential discussions may not result in a definitive agreement for many reasons. For example, whether we reach a definitive agreement for a collaboration will depend, among other things, upon our assessment of the collaborator’s resources and expertise, the terms and conditions of the proposed collaboration, and the proposed collaborator’s evaluation of a number of factors, such as the design or results of our clinical trials, the potential market for our product candidates, the costs and complexities of manufacturing and delivering our product candidates to patients, the potential of competing products, the existence of uncertainty with respect to ownership or the coverage of our intellectual property, and industry and market conditions generally. If we were to determine that additional collaborations for our Gencaro development is necessary and were unable to enter into such collaborations on acceptable terms, we might elect to delay or scale back the development or commercialization of Gencaro in order to preserve our financial resources or to allow us adequate time to develop the required physical resources and systems and expertise ourselves.

Collaboration agreements may not lead to development or commercialization of our product candidates in the most efficient manner, or at all. In addition, there have been a significant number of recent business combinations among large pharmaceutical companies that have resulted in a reduced number of potential future collaborators. If a present or future collaborator of ours were to be involved in a business combination, the continued pursuit and emphasis on our product development or commercialization program could be delayed, diminished or terminated.

Any future clinical trial for Gencaro will require the use of a third-party diagnostic services provider to administer a genetic test needed to identify the patient receptor genotypes of clinical trial participants, and as a result, we will be unable to directly control the timing, conduct and expense of the genetic test.

We anticipate that any future clinical trial of Gencaro, if any, will require a companion diagnostic test that identifies the patient’s receptor genotype. The trial would only enroll those patients with the receptor that has the potential for enhanced efficacy, the beta-1 389 Arg receptor as detected by a beta-1 389 Arg/Arg genotype. Accordingly, we anticipate that any future clinical trial for Gencaro will require the use of a third-party diagnostic service to perform the genetic testing. There has been limited experience in our industry in prospective development of companion diagnostics required to perform the required molecular profiling. We entered into an agreement with LabCorp to provide the diagnostic services of the genetic test needed to support our GENETIC-AF clinical trial. To provide those services, LabCorp obtained from the FDA an investigational device exemption for the companion diagnostic test being used in our GENETIC-AF clinical trial. We would expect a similar agreement and approval would be necessary for any companion diagnostic used in any future clinical trials for Gencaro.

The FDA and similar regulatory authorities outside the United States regulate companion diagnostics. Companion diagnostics require separate or coordinated regulatory approval prior to commercialization. Changes to regulatory advice could delay our development programs or delay or prevent eventual marketing approval for our product candidates that may otherwise be approvable. In July 2011, the FDA issued draft guidance that stated that if safe and effective use of a therapeutic depends on an in vitro diagnostic, the FDA generally will not approve the therapeutic unless the FDA approves or clears this “in vitro companion diagnostic device” at the same time that the FDA approves the therapeutic. The approval or clearance of the companion diagnostic would occur through the FDA’s Center for Devices and Radiological Health. In 2014, the FDA issued guidance on in vitro companion diagnostic devices. The guidance allows for flexibility by the FDA in the case of therapeutic products to treat serious conditions for which no alternative treatment exists and the benefits of using the companion diagnostic outweigh the risk, but it is unclear how this discretion may be applied by the agency with respect to the companion diagnostic test related to any Gencaro clinical trials. The FDA’s evolving position on the topic of companion diagnostics could affect our clinical development programs that utilize companion diagnostics. In particular, the FDA may limit our ability to use retrospective data, otherwise disagree with our approaches to trial design, biomarker qualification, clinical and analytical validity, and clinical utility, or make us repeat aspects of a trial or initiate new trials.

Given our limited experience in developing diagnostics, we expect to rely primarily on third parties for the design and manufacture of the companion diagnostics for our product candidates. If we, or any third parties that we engage to assist us, are unable to successfully develop companion diagnostics for our product candidates that require such diagnostics, or experience delays in doing so, the development of our product candidates may be adversely affected, our product candidates may not receive marketing approval and we may not realize the full commercial potential of any products that receive marketing approval. As a result, our business could be materially harmed.

We will need to establish a collaborative arrangement with a third-party diagnostics services provider to obtain marketing clearance or approval of the companion genetic test for Gencaro. There is no guarantee that the FDA will grant timely clearance or approval of the genetic test, if at all, and failure to obtain such timely clearance or approval would adversely affect our ability to market Gencaro.

The drug label we intend to seek for Gencaro would identify the patient receptor genotype for which the drug is approved. Accordingly, we believe developing a genetic test that is simple to administer and widely available will be critical to the successful commercialization of Gencaro. The genetic test will be subject to regulation by the FDA and by comparable agencies in various foreign countries. The process of complying with the requirements of the FDA and comparable agencies is costly, time consuming and burdensome.

Despite the time and expense expended, regulatory clearance or approval is never guaranteed. If regulatory clearance or approval is delayed, or if one or more third-party diagnostic services providers are unable to obtain FDA approval of the genetic test at all or in parallel with the approval of Gencaro, or are unable to commercialize the test successfully and in a manner that effectively supports the commercial efforts for Gencaro, or if the information concerning the differential response to Gencaro resulting from certain genetic variation is not included in the approval label for Gencaro, the commercial launch of Gencaro may be significantly and adversely affected.

Regulatory approval is required for the genetic test to be used in our Gencaro clinical trials and to support the commercialization of the test, if approved. Delays or failures in obtaining such regulatory approval, including any required validation analyses may prevent a third-party diagnostics provider from commercializing such genetic test and will adversely affect our business, operating results and prospects.

Before a genetic test can be used commercially, including in conjunction with Gencaro, if it is approved for marketing, the third-party diagnostics provider must obtain FDA Premarket Approval (“PMA”) for such test. The FDA may require additional validation of the genetic test we used in GENETIC-AF prior to any approval of Gencaro or the genetic test or prior to the use of such test in any future clinical trials for Gencaro. We anticipate the genetic test will be required as a condition to prescribing Gencaro. There is no guarantee the FDA will approve the anticipated PMA submission for the genetic test. Even if the genetic test is eventually approved, performing additional validation work necessary to support the PMA, if required, for current or future genetic test products, including one associated with Gencaro, would require additional time and expense and the outcome would be uncertain. Moreover, such delays or increased costs or failures could adversely affect our business, operating results and prospects for commercializing the genetic test.

If a third-party diagnostics provider responsible for the genetic test associated with Gencaro or certain of its third-party suppliers fails to comply with ongoing FDA or other foreign regulatory authority requirements, or if there are unanticipated problems with the genetic test, these products could be subject to restrictions or withdrawal from use in a trial or from the market.

Any diagnostic for which a third-party diagnostics provider obtains clearance or approval, and the manufacturing processes, reporting requirements, post-approval clinical data and promotional activities for such product, will be subject to continued regulatory review, oversight and periodic inspections by the FDA and other domestic and foreign regulatory bodies. With respect to the genetic test, to the extent applicable, any third-party diagnostics provider and certain of its suppliers will be required to comply with the FDA’s Quality System Regulation (“QSR”) and International Standards Organization (“ISO”) requirements, which cover the methods and documentation of the design, testing, production, control, quality assurance, labeling, packaging, storage and shipping of any product for which clearance or approval is obtained. Regulatory bodies, such as the FDA, enforce the QSR and other regulations through periodic inspections. The failure by a third-party diagnostics provider, or certain of its third-party manufacturers or suppliers, as the case may be, to comply with applicable statutes and regulations administered by the FDA and other regulatory bodies, or the failure to timely and adequately respond to any adverse inspectional observations or product safety issues, could result in, among other things, enforcement actions. If any of these actions were to occur, it could harm our reputation and cause product sales and profitability of Gencaro, if approved, to suffer and may prevent us from generating revenue or utilizing the genetic test further in any clinical trial. Even if regulatory clearance or approval is granted, such clearance or approval may be subject to limitations on the intended uses for which the product may be marketed and reduce our potential to successfully commercialize the product and generate revenue from the product.

Future sales of Gencaro may suffer if its marketplace acceptance is negatively affected by the genetic test.

The genetic test is an important component of the commercial strategy for Gencaro in addition to being required for our clinical trials. We believe that the genetic test helps predict patient response to Gencaro, and that this aspect of the drug is important to its ability to compete effectively with current therapies. The genetic test adds an additional step in the prescribing process, an additional cost for the patient and payors, the risk that the test results may not be rapidly available and the possibility that it may not be available at all to hospitals and medical centers. Although we anticipate that Gencaro, if approved in a timely manner, would be the first genetically-targeted cardiovascular drug, Gencaro will be one of a number of successful drugs in the beta-blocker class currently on the market. Prescribers may be more familiar with these other beta-blockers, and may be resistant to prescribing Gencaro as an AF therapy in patients with HF. For instance, the top-line results of our Phase 2B GENETIC-AF clinical trial indicated that Gencaro demonstrated a similar treatment benefit compared to the active comparator, metoprolol succinate (TOPROL-XL). If our future clinical trials in Gencaro do not show that Gencaro has a clear therapeutic benefit as compared to other drugs in the beta-blocker class currently on the market, then prescribers may be unlikely to prescribe Gencaro to patients, even if approved. Any one of these factors could affect prescriber behavior, which in turn may substantially impede market acceptance of the genetic test, which could cause significant harm to Gencaro’s ability to compete, and in turn harm our business.

Unless we are able to generate sufficient product revenue, we will continue to incur losses from operations and will not achieve or maintain profitability. We are years away from commercializing a product and generating product revenue.

Our historical losses have had and will continue to have an adverse effect on our stockholders’ equity and working capital, among other things. We are years away from commercializing a product and generating any product revenue. As a result, we expect to continue to incur significant operating losses for the foreseeable future. Even if we ultimately receive regulatory approval for Gencaro, rNAPc2 or our other product candidates, sales of such products may not generate sufficient revenue for it to achieve or maintain profitability. Because of the numerous risks and uncertainties associated with developing therapeutic drugs, we may experience larger than expected future losses and may never reach profitability.

Our product candidates are subject to extensive regulation, which can be costly and time-consuming, and unsuccessful or delayed regulatory approvals could increase our future development costs or impair our future revenue.

The preclinical and clinical development, testing, manufacture, safety, efficacy, labeling, storage, recordkeeping, and subsequent advertising, promotion, sale, marketing, and distribution, if approved, of our product candidates are subject to extensive regulation by the FDA and other regulatory authorities in the United States and elsewhere. These regulations also vary in important, meaningful ways from country to country. We are not permitted to market a potential drug in the United States until we receive approval of a New Drug Application (an “NDA”) from the FDA for such drug. We have not received an NDA approval from the FDA for Gencaro, rNAPc2 or any of our other product candidates. There can be no guarantees with respect to our product candidates that clinical studies will adequately support an NDA, that the products will receive necessary regulatory approvals, or that they will prove to be commercially successful.

To receive regulatory approval for the commercial sale of any product candidates, we must demonstrate safety and efficacy in humans to the satisfaction of regulatory authorities through preclinical studies and adequate and well-controlled clinical trials of the product candidates. This process is expensive and can take many years, and failure can occur at any stage of the testing. Our failure to adequately demonstrate the safety and efficacy of our product candidates will prevent regulatory approval and commercialization of such products.

In 2008, we submitted and the FDA accepted our NDA filing for Gencaro for the treatment of chronic HF. In 2009, the FDA issued a Complete Response Letter in which the FDA stated that it could not approve the Gencaro NDA in its current form and specified actions required for approval of the NDA, including conducting an additional Phase 3 clinical trial of Gencaro in patients with HF. We completed a Phase 2B clinical study of Gencaro in HF patients to assess its efficacy in reducing or preventing AF. We enrolled 267 HF patients with AF in the Phase 2B clinical trial. We reported top-line Phase 2B data in February 2018. In the third quarter of 2018, we submitted a SPA to the FDA for a Phase 3 clinical trial. In 2019, the FDA approved our SPA request for a Phase 3 clinical trial of Gencaro. Even though the FDA approved our SPA, this product candidate will require years of additional clinical development. Even if we conduct additional studies in accordance with our SPA agreement or further FDA guidance and submit or file a new or amended NDA, the FDA may ultimately decide that the NDA does not satisfy the criteria for approval.

In the event that we or our collaborators conduct preclinical studies that do not comply with Good Laboratory Practices (“GLP”) or incorrectly design or carry out human clinical trials in accordance with Good Clinical Practices (“GCP”) or those clinical trials fail to demonstrate clinical significance, it is unlikely that we will be able to obtain FDA approval for product development candidates. Our inability to successfully initiate and effectively complete clinical trials for any product candidate on schedule, or at all, will severely harm our business. Significant delays in clinical development could materially increase product development costs or allow our competitors to bring products to market before we do, impairing our ability to effectively commercialize any future product candidate. We do not know whether planned clinical trials will begin on time, will need to be redesigned or will be completed on schedule, if at all. Clinical trials can be delayed for a variety of reasons, including:

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delays or failures in obtaining regulatory authorization to commence a trial because of safety concerns of regulators relating to our product candidates or similar product candidates of our competitors or failure to follow regulatory guidelines;

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delays or failures in obtaining clinical materials and manufacturing sufficient quantities of the product candidates for use in trials;

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failure of clinical materials to meet pre-established specifications at product release or during ongoing stability studies;

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delays or failures in reaching agreement on acceptable terms with prospective study sites;

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delays or failures in obtaining approval of our clinical trial protocol from an institutional review board to conduct a clinical trial at a prospective study site;

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delays in recruiting patients to participate in a clinical trial, which may be due to the size of the patient population, eligibility criteria, protocol design, perceived risks and benefits of the drug, availability of other approved and standard of care therapies or, availability of clinical trial sites;

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other clinical trials seeking to enroll subjects with similar profile;

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failure of our clinical trials and clinical investigators to be in compliance with GCP;

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unforeseen safety issues, including negative results from ongoing preclinical studies;

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inability to monitor patients adequately during or after treatment;

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difficulty recruiting and monitoring multiple study sites;

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failure of our third-party contract research organizations, clinical site organizations and other clinical trial managers, to satisfy their contractual duties, comply with regulations or meet expected deadlines; and

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an insufficient number of patients who have, or are willing to have, a Medtronic device implanted for monitoring and recording AF burden data.

In addition, any approvals we may obtain may not cover all of the clinical indications for which we seek approval or permit us to make claims of superiority over currently marketed competitive products. Also, an approval might contain significant limitations in the form of narrow indications, warnings, precautions or contraindications with respect to conditions of use. If the FDA determines that a risk evaluation and mitigation strategy (“REMS”) is necessary to ensure that the benefits of the drug outweigh the risks, we may be required to include as part of the NDA a proposed REMS that may include a package insert directed to patients, a plan for communication with healthcare providers, restrictions on a drug’s distribution, or a Medication Guide, to provide better information to consumers about the drug’s risks and benefits. Finally, an approval could be conditioned on our commitment to conduct further clinical trials, which we may not have the resources to conduct or which may negatively impact our financial situation.

The manufacture and analytical testing of Gencaro and rNAPc2 is performed by third-party suppliers, who must also meet cGMP requirements and pass a pre-approval inspection of their facilities before we can obtain marketing approval.

All of our product candidates are prone to the risks of failure inherent in drug development. The results from preclinical animal testing and early human clinical trials may not be predictive of results obtained in later human clinical trials. Further, although a new product may show promising results in preclinical or early human clinical trials, it may subsequently prove unfeasible or impossible to generate sufficient safety and efficacy data to obtain necessary regulatory approvals. The data obtained from preclinical and clinical studies are susceptible to varying interpretations that may delay, limit or prevent regulatory approval, and the FDA and other regulatory authorities in the United States and elsewhere exercise substantial discretion in the drug approval process. The numbers, size and design of preclinical studies and clinical trials that will be required for FDA or other regulatory approval will vary depending on the product candidate, the disease or condition for which the product candidate is intended to be used and the regulations and guidance documents applicable to any particular product candidate. The FDA or other regulators can delay, limit or deny approval of any product candidate for many reasons, including, but not limited to:

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side effects;

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safety and efficacy;

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defects in the design of clinical trials;

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the fact that the FDA or other regulatory officials may not approve our or our third-party manufacturer’s processes or facilities; or

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the fact that new regulations may be enacted by the FDA or other regulators may change their approval policies or adopt new regulations requiring new or different evidence of safety and efficacy for the intended use of a product candidate.

In light of widely publicized events concerning the safety of certain drug products, regulatory authorities, members of Congress, the Government Accountability Office, medical professionals and the general public have raised concerns about potential drug safety issues. These events have resulted in the withdrawal of certain drug products, revisions to certain drug labeling that further limit use of the drug products and establishment of risk management programs that may, for instance, restrict distribution of drug products. The increased attention to drug safety issues may result in a more cautious approach by the FDA to clinical trials and approval. Data from clinical trials may receive greater scrutiny with respect to safety and the product’s risk/benefit profile, which may make the FDA or other regulatory authorities more likely to terminate clinical trials before completion, or require longer or additional clinical trials that may result in substantial additional expense, and a delay or failure in obtaining approval or approval for a more limited indication than originally sought. Aside from issues concerning the quality and sufficiency of submitted preclinical and clinical data, the FDA may be constrained by limited resources from reviewing and determining the approvability of the Gencaro NDA in a timely manner.

In pursuing clinical development of Gencaro for an AF indication, we will be required to amend the Gencaro HF NDA or prepare a new NDA. The FDA could approve Gencaro, but without including some or all of the prescribing information that we have requested. For instance, the FDA could approve Gencaro for AF in a more limited patient population or include additional warnings in the drug’s label. This, in turn, could substantially and detrimentally impact our ability to successfully commercialize Gencaro and effectively protect our intellectual property rights in Gencaro.

If our product candidates receive regulatory approval, we would be subject to ongoing regulatory obligations and restrictions, which may result in significant expenses and limit our ability to develop and commercialize other potential products.

If a product candidate of ours is approved by the FDA or by another regulatory authority, we would be held to extensive regulatory requirements over product manufacturing, testing, distribution, labeling, packaging, adverse event reporting and other reporting to regulatory authorities, storage, advertising, marketing, promotion, distribution, and record keeping. Regulatory approvals may also be subject to significant limitations on the indicated uses or marketing of the product candidates. Potentially costly follow-up or post-marketing clinical studies may be required as a condition of approval to further substantiate safety or efficacy, or to investigate specific issues of interest to the regulatory authority. Previously unknown problems with the product candidate, including adverse events of unanticipated severity or frequency, may result in additional regulatory controls or restrictions on the marketing or use of the product or the need for post marketing studies, and could include suspension or withdrawal of the products from the market.

Furthermore, our third-party manufacturers and the manufacturing facilities that they use to make our product candidates are regulated by the FDA. Quality control and manufacturing procedures must continue to conform to cGMP after approval. Drug manufacturers and their subcontractors are required to register their facilities and products manufactured annually with the FDA and certain state agencies and are subject to periodic unannounced inspections by the FDA, state and/or other foreign authorities. Any subsequent discovery of problems with a product, or a manufacturing or laboratory facility used by us or our collaborators, may result in restrictions on the product, or on the manufacturing or laboratory facility, including a withdrawal of the drug from the market or suspension of manufacturing. Any changes to an approved product, including the way it is manufactured or promoted, often require FDA approval before the product, as modified, can be marketed. We and our third-party manufacturers will also be subject to ongoing FDA requirements for submission of safety and other post-market information.

The marketing and advertising of our drug products by our collaborators or us will be regulated by the FDA, certain state agencies or foreign regulatory authorities. Violations of these laws and regulations, including promotion of our products for unapproved uses or failing to disclose risk information, are punishable by criminal and civil sanctions and may result in the issuance of enforcement letters or other enforcement action by the FDA, U.S. Department of Justice, state agencies, or foreign regulatory authorities that could jeopardize our ability to market the product.

In addition to the FDA, state or foreign regulations, the marketing of our drug products by us or our collaborators will be regulated by federal, state or foreign laws pertaining to health care “fraud and abuse,” such as the federal anti-kickback law prohibiting bribes, kickbacks or other remuneration for the order or recommendation of items or services reimbursed by federal health care programs. Many states have similar laws applicable to items or services reimbursed by commercial insurers. Violations of these laws are punishable by criminal and civil sanctions, including, in some instances, imprisonment and exclusion from participation in federal and state health care programs, including the Medicare, Medicaid and Veterans Affairs healthcare programs. Because of the far-reaching nature of these laws, we may be required to discontinue one or more of our practices to be in compliance with these laws. Healthcare fraud and abuse regulations are complex, and even minor irregularities can potentially give rise to claims that a statute or prohibition has been violated. Any violations of these laws, or any action against us for violations of these laws, even if we successfully defend against it, could have a material adverse effect on our business, financial condition and results of operations.

We could also become subject to false claims litigation under federal statutes, which can lead to civil money penalties, restitution, criminal fines and imprisonment, and exclusion from participation in Medicare, Medicaid and other federal and state health care programs. These false claims statutes include the False Claims Act, which allows any person to bring a suit on behalf of the federal government alleging submission of false or fraudulent claims, or causing to present such false or fraudulent claims, under federal programs or contracts claims or other violations of the statute and to share in any amounts paid by the entity to the government in fines or settlement. These suits against pharmaceutical companies have increased significantly in volume and breadth in recent years. Some of these suits have been brought on the basis of certain sales practices promoting drug products for unapproved uses. This new growth in litigation has increased the risk that a pharmaceutical company will have to defend a false claim action, pay fines or restitution, or be excluded from the Medicare, Medicaid, Veterans Affairs and other federal and state healthcare programs as a result of an investigation arising out of such action. We may become subject to such litigation and, if we are not successful in defending against such actions, those actions may have a material adverse effect on our business, financial condition and results of operations. We could also become subject to false claims litigation and consumer protection claims under state statutes, which also could lead to civil monetary penalties, restitution, criminal fines and imprisonment, and exclusion from participation in state health care programs. Of note, over the past few years there has been an increased focus on the sales and marketing practices of the pharmaceutical industry at both the federal and state level. Additionally, the law or regulatory policies governing pharmaceuticals may change. New statutory requirements may be enacted or additional regulations may be adopted that could prevent or delay regulatory approval of our product candidates or limit our ability to commercialize our products. We cannot predict the likelihood, nature or extent of adverse government regulation that may arise from future legislation or administrative action, either in the United States or elsewhere.

If we, our collaborators or our third-party manufacturers fail to comply with applicable continuing regulatory requirements, our business could be seriously harmed because a regulatory agency may:

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issue untitled or warning letters;

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suspend or withdraw our regulatory approval for approved products;

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seize or detain products or recommend a product recall of a drug or medical device, or issue a mandatory recall of a medical device;

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refuse to approve pending applications or supplements to approved applications filed by us;

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suspend our ongoing clinical trials;

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restrict our operations, including costly new manufacturing requirements, or restrict the sale, marketing and/or distribution of our products;

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seek an injunction;

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pursue criminal prosecutions;

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close the facilities of our contract manufacturers; or

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impose civil or criminal penalties.

Reliance on third parties to commercialize Gencaro, rNAPc2 or our other product candidates could negatively impact our business. If we are required to establish a direct sales force in the United States and are unable to do so, our business may be harmed.

Commercialization of Gencaro, rNAPc2 or any other product candidate, if approved, particularly the establishment of a sales organization, will require substantial additional capital resources. We currently intend to pursue a strategic partnership alternative for the commercialization of Gencaro or rNAPc2, if it is approved, and we have suspended our efforts to build internal sales, marketing and distribution capabilities. If we elect to rely on third parties to sell Gencaro, rNAPc2 and any other products, then we may receive less revenue than if we sold such products directly. In addition, we may have little or no control over the sales efforts of those third parties. If we are unable to complete a strategic transaction, we would be unable to commercialize Gencaro, rNAPc2 or any other product candidate without substantial additional capital. Even if such capital were secured, we would be required to build internal sales, marketing and distribution capabilities to market Gencaro or rNAPc2 in the United States. None of our current employees have experience in establishing and managing a sales force.

In the event we are unable to sell Gencaro, rNAPc2 and other selected product candidates, either directly or through third parties via a strategic transaction, the commercialization of Gencaro or rNAPc2, if approved, may be delayed indefinitely.

We are dependent on our key personnel.

The success of our business is highly dependent on the principal members of our board of directors and executive management. The loss of the services of any such individual might seriously harm our product development, partnering and financing efforts. Recruiting and training personnel with the requisite skills is challenging and we compete for talent with companies that are larger and have more financial resources.

We have no manufacturing capacity which puts us at risk of lengthy and costly delays of bringing our products to market.

We do not currently operate manufacturing facilities for clinical or commercial production of our product candidates, including their drug substance or active pharmaceutical ingredients (“API”). We have no experience in drug formulation or manufacturing, and we lack the resources and the capabilities to manufacture any of our product candidates on a clinical or commercial scale. We do not intend to develop facilities for the manufacture of product candidates for clinical trials or commercial purposes in the foreseeable future. We have contracted with several third-party manufacturing organizations for production and analytical testing of our product candidates. These contract manufacturers may not perform as agreed or may not remain in the contract manufacturing business for the time required to successfully produce, store and distribute our products. In addition, these manufacturers may have staffing difficulties, may experience delays due to key material or component availability, may not be able to manufacture our products on a timely basis or may become financially distressed. In the event of errors in forecasting production quantities required to meet demand, natural disaster, equipment malfunctions or failures, technology malfunctions, strikes, lock-outs or work stoppages, regional power outages, product tampering, war or terrorist activities, actions of regulatory authorities, business failure, strike or other difficulty, we may be unable to find an alternative third-party manufacturer in a timely manner and the production of our product candidates would be interrupted, resulting in delays and additional costs, which could impact our ability to commercialize and sell our product candidates. We or our contract manufacturers may also fail to achieve and maintain required manufacturing standards, which could result in patient injury or death, product recalls or withdrawals, an order by governmental authorities to halt production, delays or failures in product testing or delivery, stability testing failures, cost overruns or other problems that could seriously hurt our business. Contract manufacturers also often encounter difficulties involving production yields, quality control and quality assurance, as well as shortages of qualified personnel. In addition, our contract manufacturers are subject to ongoing inspections and regulation by the FDA, the U.S. Drug Enforcement Agency and corresponding foreign and state agencies and they may fail to meet these agencies’ acceptable standards of compliance. If our contract manufacturers fail to comply with applicable governmental regulations, such as quality control, quality assurance and the maintenance of records and documentation, we may not be able to continue production of the API or finished product. If the safety of any API or product supplied is compromised due to failure to adhere to applicable laws or for other reasons, this may jeopardize our regulatory approval for Gencaro, rNAPc2 and other product candidates, and we may be held liable for any injuries sustained as a result. Upon the occurrence of one of the aforementioned events, the ability to switch manufacturers may be difficult for a number of reasons, including:

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the number of potential manufacturers is limited and we may not be able to negotiate agreements with alternative manufacturers on commercially reasonable terms, if at all;

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long lead times are often needed to manufacture drugs;

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the manufacturing process is complex and may require a significant learning curve; and

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the FDA must approve any replacement prior to manufacturing, which requires new testing and compliance inspections.

Transitioning from a clinical development stage company will require successful completion of a number of steps, many of which are outside of our control and, consequently, we can provide no assurance of our successful and timely transition from a clinical development stage company.

We are a clinical development stage biopharmaceutical company with a limited operating history. To date we have not generated any product revenue and have historically funded our operations through investment capital. Our future growth depends on our ability to emerge from the clinical development stage and successfully commercialize or provide for the commercialization of Gencaro, rNAPc2 and our other product candidates which in turn, will depend, among other things, on our ability to:

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conduct additional clinical trials and develop and obtain regulatory approval for Gencaro, rNAPc2 or other product candidates;

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successfully partner a companion genetic test with the commercial launch of Gencaro or rNAPc2;

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enter into a strategic transaction enabling the continued development and commercialization of Gencaro or rNAPc2, or alternatively, raise significant additional capital to enable these activities;

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pursue additional indications for Gencaro or rNAPc2 and develop other product candidates, including other cardiovascular therapies; and

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obtain commercial quantities of Gencaro, rNAPc2 or other product candidates at acceptable cost levels.

Any one of these factors or other factors discussed in this report could affect our ability to successfully commercialize Gencaro and other product candidates, which could impact our ability to earn sufficient revenues to transition from a clinical development stage company and continue our business.

If approved by the FDA, Gencaro or rNAPc2 will be entering a competitive marketplace and may not succeed.

Gencaro is a new type of beta-blocker and vasodilator being developed for AF. While we anticipate that this drug, if approved, would be the first genetically-targeted cardiovascular drug, and potentially the only beta-blocker approved for AF, Gencaro will be one of a number of accepted treatments for AF. In addition, our proposed prescribing information for Gencaro is expected to include a requirement for genetic testing of the patient to ascertain if they have the genotype that we believe responds best to Gencaro. This additional step will add incremental cost and procedures to prescribing Gencaro, which could make it more difficult to compete against existing therapies.

We do not yet know what the commercial opportunity will be, if any, for rNAPc2 if it is approved for treating COVID-19 disease. We do not know how and to whom rNAPc2 would be marketed and what the commercial arrangements would be for its sales and reimbursement. While we anticipate that rNAPc2, if approved, could potentially be used in combination with antiviral drugs and other therapies, there are other vaccines and therapies under development.

Our commercial opportunity may be reduced or eliminated if competitors develop and commercialize products that are safer, more effective, have fewer side effects, are more convenient or are less expensive than Gencaro. If products with any of these properties are developed, or any of the existing products are better marketed, then prescriptions of Gencaro by physicians and patient use of Gencaro could be significantly reduced or rendered obsolete and noncompetitive. Further, public announcements regarding the development of any such competing drugs could adversely affect the market price of our common stock and the value of our assets.

Future sales of our products may suffer if they are not accepted in the marketplace by physicians, patients and the medical community.

Gencaro, rNAPc2 or our other product candidates may not gain market acceptance among physicians, patients and the medical community. The degree of market acceptance of Gencaro, rNAPc2 or our other product candidates will depend on a number of factors, such as its effectiveness and tolerability, as compared with competitive drugs. For instance, if rNAPc2 is approved, by that time there may be superior alternatives in terms of vaccines and/or therapeutics that may significantly impact the relative medical benefits offered by rNAPc2. If our future clinical trials for rNAPc2 do not show that rNAPc2 has a clear therapeutic benefit as compared to other therapies or vaccines that are approved in the interim, then there may be a limited or no commercial market for rNAPc2. Also, prevalence and severity of side-effects could negatively affect market acceptance of rNAPc2. Failure to achieve market acceptance of Gencaro or rNAPc2 would significantly harm our business.

If we are unable to obtain acceptable prices or adequate reimbursement from third-party payors for Gencaro, rNAPc2, or any other product candidates that we may seek to commercialize, then our revenues and prospects for profitability will suffer.

Our or any strategic partner’s ability to commercialize Gencaro, rNAPc2, or any other product candidates that we may seek to commercialize, is highly dependent on the extent to which coverage and reimbursement for these product candidates will be available from:

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governmental payors, such as Medicare and Medicaid;

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private health insurers, including managed-care organizations; and

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other third-party payors.

Many patients will not be capable of paying for our potential products themselves and will rely on third-party payors to pay for their medical needs. A primary current trend in the U.S. health care industry is toward cost containment. Large private payors, managed-care organizations, group purchasing organizations and similar organizations are exerting increasing influence on decisions regarding the use of, and reimbursement levels for, particular treatments. Such third-party payors, including Medicare, are challenging the prices charged for medical products and services, and many third-party payors limit reimbursement for newly approved health care products.

Cost-control initiatives could decrease the price we might establish for products, which could result in product revenues lower than anticipated. If the prices for our product candidates decrease, or if governmental and other third-party payors do not provide adequate coverage and reimbursement levels, then our revenue and prospects for profitability will suffer.

Health care reform measures could materially and adversely affect our business.

The business and financial condition of pharmaceutical and biotechnology companies are affected by the efforts of governmental and third-party payors to contain or reduce the costs of health care. The U.S. Congress has enacted legislation to reform the health care system. While we anticipate that this legislation may, over time, increase the number of patients who have insurance coverage for pharmaceutical products, it also imposes cost containment measures that may adversely affect the amount of reimbursement for pharmaceutical products. These measures include increasing the minimum rebates for products covered by Medicaid programs and extending such rebates to drugs dispensed to Medicaid beneficiaries enrolled in Medicaid managed care organizations as well as expansion of the 340(B) Public Health Services drug discount program. In addition, such legislation contains a number of provisions designed to generate the revenues necessary to fund the coverage expansion, including new fees or taxes on certain health-related industries, including medical device manufacturers. Each medical device manufacturer has to pay an excise tax (or sales tax) in an amount equal to 2.3% of the price for which such manufacturer sells its medical devices. Such excise taxes may impact any potential sales of the genetic test if it is approved for marketing. On January 22, 2018, legislation was enacted suspending the medical device tax in 2018 and 2019. In December 2019, a permanent repeal of the medical device tax was enacted. The Gencaro Test is likely to be subject to this tax if this tax is reinstated in the future. In foreign jurisdictions there have been, and we expect that there will continue to be, a number of legislative and regulatory proposals aimed at changing the health care system. For example, in some countries other than the United States, pricing of prescription drugs is subject to government control and we expect to see continued efforts to reduce healthcare costs in international markets.

Some states are also considering legislation that would control the prices of drugs, and state Medicaid programs are increasingly requesting manufacturers to pay supplemental rebates and requiring prior authorization by the state program for use of any drug for which supplemental rebates are not being paid. Managed care organizations continue to seek price discounts and, in some cases, to impose restrictions on the coverage of particular drugs. Government efforts to reduce Medicaid expenses may lead to increased use of managed care organizations by Medicaid programs. This may result in managed care organizations influencing prescription decisions for a larger segment of the population and a corresponding constraint on prices and reimbursement for drugs. It is likely that federal and state legislatures and health agencies will continue to focus on additional health care reform in the future although we are unable to predict what additional legislation or regulation, if any, relating to the health care industry or third-party coverage and reimbursement may be enacted in the future or what effect such legislation or regulation would have on our business. We or any strategic partner’s ability to commercialize Gencaro, rNAPc2, or any other product candidates that we may seek to commercialize, is highly dependent on the extent to which coverage and reimbursement for these product candidates will be available from government payors, such as Medicare and Medicaid, private health insurers, including managed care organizations, and other third-party payors, and any change in reimbursement levels could materially and adversely affect our business. Further, the pendency or approval of future proposals or reforms could result in a decrease in our stock price or limit our ability to raise capital or to obtain strategic partnerships or licenses.

Our competitors may be better positioned in the marketplace and thereby may be more successful than us at developing, manufacturing and marketing approved products.

Many of our competitors currently have significantly greater financial resources and expertise in conducting clinical trials, obtaining regulatory approvals, managing manufacturing and marketing approved products than us. Other early-stage companies may also prove to be significant competitors, particularly through collaborative arrangements with large and established companies. In addition, these third parties compete with us in recruiting and retaining qualified scientific and management personnel, establishing clinical trial sites and patient registration for clinical trials, as well as in acquiring therapies and therapy licenses complementary to our programs or advantageous to our business. We expect that our ability to compete effectively will depend upon our ability to:

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successfully and rapidly complete clinical trials for any product candidates and obtain all requisite regulatory approvals in a cost-effective manner;

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build an adequate sales and marketing infrastructure, raise additional funding, or enter into strategic transactions enabling the commercialization of our products;

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develop competitive formulations of our product candidates;

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attract and retain key personnel; and

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identify and obtain other product candidates on commercially reasonable terms.

If we fail to identify and license or acquire other products or product candidates, then we may be unable to expand our business, and the acquisition or licensing of other products or product candidates may put a strain on our operations and will likely require us to seek additional financing.

One of our strategies is to license or acquire clinical-stage products or product candidates and further develop them for commercialization. The market for licensing and acquiring products and product candidates is intensely competitive and many of our competitors may have greater resources than we do. If we undertake any additional acquisitions, whether of product candidates or other biopharmaceutical companies, the process of integrating an acquired product candidate or complementary company into our business may put a strain on our operations, divert personnel, financial resources and management’s attention. In 2020, our research and development activities were dedicated to initiating the clinical trial of rNAPc2. If we are not able to substantially expand our research and development efforts, or identify, or license or acquire other products or product candidates or complete future acquisitions, then we will likely be unable expand our pipeline of product candidates. In addition, any future acquisition would give rise to additional operating costs and will likely require us to seek additional financing. Future acquisitions could result in additional issuances of equity securities that would dilute the ownership of existing stockholders. Future acquisitions could also result in the incurrence of debt, contingent liabilities or the amortization of expenses related to other intangible assets, any of which could adversely affect our operating results.

We would be subject to applicable regulatory approval requirements of the foreign countries in which we market our products, which are costly and may prevent or delay us from marketing our products in those countries.

In addition to regulatory requirements in the United States, we would be subject to the regulatory approval requirements in each foreign country where we market our products. In addition, we might be required to identify one or more collaborators in these foreign countries to develop, seek approval for and manufacture our products and any companion genetic test for Gencaro. If we decide to pursue regulatory approvals and commercialization of our product candidates internationally, we may not be able to obtain the required foreign regulatory approvals on a timely basis, if at all, and any failure to do so may cause us to incur additional costs or prevent us from marketing our products in foreign countries, which may have a material adverse effect on our business, financial condition and results of operations.

If our internal control over financial reporting is not considered effective, our business and stock price could be adversely affected.

Section 404 of the Sarbanes-Oxley Act of 2002 requires us to evaluate the effectiveness of our internal control over financial reporting as of the end of each fiscal year, and to include a management report assessing the effectiveness of our internal control over financial reporting in our Annual Report on Form 10-K for that fiscal year. Our management, including our principal executive officer and principal financial officer, does not expect that our internal control over financial reporting will prevent all error and all fraud. We continue to operate with a small staff for financial reporting. Though the process and design of our internal controls over financial reporting have not been altered, the small number of staff involved in financial reporting may limit our ability to properly segregate internal control procedures which could result in deficiencies or material weaknesses in our internal controls in the future. 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. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud involving a company have been, or will be, detected. The design of any system of controls is based in part on certain assumptions about the likelihood of future events, and we cannot assure you that any design will succeed in achieving its stated goals under all potential future conditions. Over time, controls may become ineffective because of changes in conditions or deterioration in the degree of compliance with policies or procedures. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected. We cannot assure you that we or our independent registered public accounting firm will not identify a material weakness in our internal control over financial reporting in the future. A material weakness in our internal control over financial reporting would require management to consider our internal control over financial reporting as ineffective. If our internal control over financial reporting is not considered effective, we may experience a loss of public confidence, which could have an adverse effect on our business and on the market price of our common stock.

Changes in tax laws or regulations that are applied adversely to us or our customers may have a material adverse effect on our business, cash flow, financial condition or results of operations.

New income, sales, use or other tax laws, statutes, rules, regulations or ordinances could be enacted at any time, which could affect the tax treatment of our domestic and foreign earnings. Any new taxes could adversely affect our domestic and international business operations, and our business and financial performance. Further, existing tax laws, statutes, rules, regulations or ordinances could be interpreted, changed, modified or applied adversely to us. For example, legislation enacted in 2017, informally titled the Tax Cuts and Jobs Act, significantly revised the Internal Revenue Code of 1986, as amended (the “Code”). Future guidance from the Internal Revenue Service and other tax authorities with respect to the Tax Cuts and Jobs Act may affect us, and certain aspects of the Tax Cuts and Jobs Act could be repealed or modified in future legislation. In addition, it is uncertain if and to what extent various states will conform to the Tax Cuts and Jobs Act or any newly enacted federal tax legislation. Changes in corporate tax rates, the realization of net deferred tax assets relating to our operations, the taxation of foreign earnings, and the deductibility of expenses under the Tax Cuts

and Jobs Act or future reform legislation could have a material impact on the value of our deferred tax assets, could result in significant one-time charges, and could increase our future U.S. tax expense.

Our ability to use our net operating losses to offset future taxable income may be subject to certain limitations.

As of December 31, 2023, we had net operating loss (“NOL”) carryforwards of approximately $208.1 million, and approximately $2.4 million of research and development credits that may be used to offset future taxable income. We had net operating loss carryforwards of $156.4 million generated prior to 2018, which will expire beginning in 2025 if not utilized. Under the Tax Cuts and Jobs Act, our U.S. federal NOLs of $51.7 million incurred in tax years beginning after December 31, 2017, may be carried forward indefinitely, but the deductibility of federal NOLs generated in tax years beginning after December 31, 2017, is limited to 80% of taxable income. In addition, under Section 382 of the Code, a corporation that undergoes an “ownership change” (as defined under Section 382 of the Code and applicable Treasury Regulations) is subject to limitations on its ability to utilize its pre-change NOLs to offset future taxable income. We have not determined whether we have experienced an ownership change in the past, and we may experience ownership changes in the future as a result of subsequent shifts in our stock ownership, some of which may be outside of our control. There is also a risk that due to regulatory changes, such as suspensions on the use of NOLs or other unforeseen reasons, our existing NOLs could expire or otherwise be unavailable to reduce future income tax liabilities, including for state tax purposes. For these reasons, we may not be able to utilize a material portion of the NOLs reflected on our balance sheet, offset by a full valuation, even if we attain profitability, which could potentially result in increased future tax liability to us and could adversely affect our operating results and financial condition.

Security breaches, cyber-attacks, or other disruptions or incidents could expose us to liability and affect our business and reputation.

We are increasingly dependent on our information technology systems and infrastructure for our business. We, our collaborators and our service providers collect, store, and transmit sensitive information including intellectual property, proprietary business information, clinical trial data and personal information in connection with our 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 by third parties with a wide range of motives and expertise, including organized criminal groups, “hacktivists,” patient groups, disgruntled current or former employees, nation-state and nation-state supported actors, and others. Cyber-attacks are of ever-increasing levels of sophistication, and despite our security measures, our information technology and infrastructure may be vulnerable to such attacks or may be breached, including due to employee error or malfeasance.

We have implemented information security measures to protect our systems, proprietary information and sensitive data against the risk of inappropriate and unauthorized external use and disclosure and other types of compromise. However, despite these measures, and due to the ever-changing information cyber-threat landscape, we cannot guarantee that these measures will be adequate to detect, prevent or mitigate security breaches and other incidents and we may be subject to data breaches through cyber-attacks, malicious code (such as viruses and worms), phishing attacks, social engineering schemes, and insider theft or misuse. Any such breach could compromise our networks and the information stored there could be accessed, modified, destroyed, publicly disclosed, lost or stolen. If our systems become compromised, we may not promptly discover the intrusion.

Any security breach of other incident, whether real or perceived, could cause us to suffer reputational damage. Such incidents could result in costs to respond to, investigate and remedy such incidents, notification obligations to affected individuals, government agencies, credit reporting agencies and other third parties, legal claims or proceedings, and liability under our contracts with other parties and federal and state laws that protect the privacy and security of personal information. Any one of these events could cause our business to be materially harmed and our results of operations would be adversely impacted.

Failure to comply with data protection laws and regulations could lead to government enforcement actions (which could include civil or criminal penalties), private litigation, and/or adverse publicity and could negatively affect our operating results and business.

We and our partners may be subject to federal, state, and foreign data protection laws and regulations (i.e., laws and regulations that address privacy and data security). In the United States, numerous federal and state laws and regulations, including state data breach notification laws, state health information privacy laws, and federal and state consumer protection laws and regulations (e.g., Section 5 of the FTC Act), that govern the collection, use, disclosure, and protection of health-related and other personal information could apply to our operations or the operations of our partners. In addition, we may obtain health information from third parties (including research institutions from which we obtain clinical trial data) that are subject to privacy and security requirements under the Health Insurance Portability and Accountability Act of 1996, as amended (“HIPAA”). Depending on the facts and circumstances, we could be subject to criminal penalties if we knowingly obtain, use, or disclose individually identifiable health information maintained by a HIPAA-covered entity in a manner that is not authorized or permitted by HIPAA.

In addition, the California Consumer Privacy Act (the “CCPA”) became effective on January 1, 2020. The CCPA gives California residents expanded rights to access and delete their personal information, opt out of certain personal information sharing and receive detailed information about how their personal information is used by requiring covered companies to provide new disclosures to California consumers (as that term is broadly defined) and provide such consumers new ways to opt-out of certain sales of personal information. The CCPA provides for civil penalties for violations, as well as a private right of action for data breaches that is expected

to increase data breach litigation. Although there are limited exemptions for clinical trial data and the CCPA’s implementation standards and enforcement practices are likely to remain uncertain for the foreseeable future, the CCPA may increase our compliance costs and potential liability. Many similar privacy laws have been proposed at the federal level and in other states.

Foreign data protection laws, including, without limitation, the European Union Directive 95/46/EC (the “Directive”) and the European Union’s General Data Protection Regulation (the “GDPR”) that became effective in May 2018, and member state data protection legislation, may also apply to health-related and other personal information obtained outside of the United States. These laws impose strict obligations on the ability to process health-related and other personal information of data subjects in the European Union and the United Kingdom, including in relation to use, collection, analysis, and transfer (including cross-border transfer) of such personal information. These laws include several requirements relating to the consent of the individuals to whom the personal data relates, limitations on data processing, establishing a legal basis for processing, notification of data processing obligations or security incidents to appropriate data protection authorities or data subjects, the security and confidentiality of the personal data and various rights that data subjects may exercise.

The Directive and the GDPR prohibit, without an appropriate legal basis, the transfer of personal data to countries outside of the European Economic Area (“EEA”) such as the United States, which are not considered by the European Commission to provide an adequate level of data protection. Switzerland has adopted similar restrictions. Although there are legal mechanisms to allow for the transfer of personal data from the EEA and Switzerland to the United States, uncertainty about compliance with European Union data protection laws remains. For example, ongoing legal challenges in Europe to the mechanisms allowing companies to transfer personal data from the EEA to the United States could result in further limitations on the ability to transfer personal data across borders, particularly if governments are unable or unwilling to reach new or maintain existing agreements that support cross-border data transfers, such as the European Union-U.S. and Swiss-U.S. Privacy Shield framework. Additionally, other countries have passed or are considering passing laws requiring local data residency.

Under the GDPR, regulators may impose substantial fines and penalties for non-compliance. Companies that violate the GDPR can face fines of up to the greater of 20 million Euros or 4% of their worldwide annual turnover (revenue). The GDPR increases our responsibility and potential liability in relation to personal data that we process, and we may be required to put in place additional mechanisms to ensure compliance with the GDPR and other EU and international data protection rules.

Compliance with U.S. and foreign privacy and security laws, rules and regulations could require us to take on more onerous obligations in our contracts, require us to engage in costly compliance exercises, restrict our ability to collect, use and disclose data, or in some cases, impact our or our partners’ or suppliers’ ability to operate in certain jurisdictions. Each of these constantly evolving laws can be subject to varying interpretations. Failure to comply with U.S. and foreign data protection laws and regulations could result in government investigations and enforcement actions (which could include civil or criminal penalties), fines, private litigation, and/or adverse publicity and could negatively affect our operating results and business. Moreover, patients about whom we or our partners obtain information, as well as the providers who share this information with us, may contractually limit our ability to use and disclose the information. Claims that we have violated individuals’ privacy rights, failed to comply with data protection laws, or breached our contractual obligations, even if we are not found liable, could be expensive and time-consuming to defend and could result in adverse publicity that could harm our business.

Risks Related to Intellectual Property and Other Legal Matters

If product liability lawsuits are successfully brought against us, then we will incur substantial liabilities and may be required to limit commercialization of Gencaro, rNAPc2 or other product candidates.

We face product liability exposure related to the testing of our product candidates in human clinical trials, and may face exposure to claims by an even greater number of persons once we begin marketing and distributing our products commercially. If we cannot successfully defend against product liability claims, then we will incur substantial liabilities.

Regardless of merit or eventual outcome, liability claims may result in:

•

decreased demand for our products and product candidates;

•

injury to our reputation;

•

withdrawal of clinical trial participants;

•

costs of related litigation;

•

substantial monetary awards to patients and others;

•

loss of revenues; and

•

the inability to commercialize our products and product candidates.

We have obtained limited product liability insurance coverage. Such coverage, however, may not be adequate or may not continue to be available to us in sufficient amounts or at an acceptable cost, or at all. We may not be able to obtain commercially reasonable product liability insurance for any product candidate.

Defending against claims relating to improper handling, storage or disposal of hazardous chemicals, radioactive or biological materials could be time consuming and expensive.

Our research and development of product candidates may involve the controlled use of hazardous materials, including chemicals, radioactive and biological materials. We cannot eliminate the risk of accidental contamination or discharge and any resultant injury from the materials. Various laws and regulations govern the use, manufacture, storage, handling and disposal of hazardous materials. We may be sued or be required to pay fines for any injury or contamination that results from our use or the use by third parties of these materials. Compliance with environmental laws and regulations may be expensive, and current or future environmental regulations may impair our research, development and production efforts.

The loss of any rights to market key products would significantly impair our operating results.

Our patent portfolios relating to Gencaro, including a patent that issued in 2021, are either owned by us or are subject to licenses that impose no royalty obligations or milestone payments relating to the further development, approval and commercialization of Gencaro.

Termination of our license agreements could result in the loss of our further rights to develop and commercialize Gencaro for any indication. The termination of any such license, or of any other agreement which enables us to market a key product or product candidate, could significantly and adversely affect our business.

Certain intellectual property licensed by us is the subject of additional licensing arrangements to which the party that has licensed rights to us is subject. If such parties were to breach the terms of such licenses or such licenses were otherwise to terminate, our and our partners’ rights to use such technology and develop and commercialize their products such as the genetic test may terminate and our business would be materially harmed.

Third parties may own or control patents or patent applications that we may be required to license to commercialize our product candidates or that could result in litigation that would be costly and time consuming.

Our or any strategic partner’s ability to commercialize Gencaro, rNAPc2 and other product candidates depends upon our ability to develop, manufacture, market and sell these drugs without infringing the proprietary rights of third parties. A number of pharmaceutical and biotechnology companies, universities and research institutions have or may be granted patents that cover technologies similar to the technologies owned by or licensed to us. We may choose to seek, or be required to seek, licenses under third-party patents, which would likely require the payment of license fees or royalties or both. We may also be unaware of existing patents that may be infringed by Gencaro or rNAPc2, the genetic testing we intend to use in connection with Gencaro or our other product candidates. Because patent applications can take many years to issue, there may be other currently pending applications that may later result in issued patents that are infringed by Gencaro, rNAPc2 or our other product candidates. Moreover, a license may not be available to us on commercially reasonable terms, or at all.

There is a substantial amount of litigation involving patent and other intellectual property rights in the biotechnology and biopharmaceutical industries generally. If a third party claims that we are infringing on its technology, then our business and results of operations could be harmed by a number of factors, including:

•

infringement and other intellectual property claims, even if without merit, are expensive and time-consuming to litigate and can divert management’s attention from our core business;

•

monetary damage awards for past infringement can be substantial;

•

a court may prohibit us from selling or licensing product candidates unless the patent holder chooses to license the patent to us; and

•

if a license is available from a patent holder, we may have to pay substantial royalties.

We may also be forced to bring an infringement action if we believe that a competitor is infringing our protected intellectual property. Any such litigation will be costly, time-consuming and divert management’s attention, and the outcome of any such litigation may not be favorable to us.

Our intellectual property rights may not preclude competitors from developing competing products and our business may suffer.

Our competitive success will depend, in part, on our ability to obtain and maintain patent protection for our inventions, technologies and discoveries, including intellectual property that we license. The patent positions of biotechnology companies involve complex legal and factual questions, and we cannot be certain that our patents and licenses will successfully preclude others from using our technology. Consequently, we cannot be certain that any of our patents will provide significant market protection or will not be circumvented or challenged and found to be unenforceable or invalid. In some cases, patent applications in the United States and certain other jurisdictions are maintained in secrecy until patents issue, and since publication of discoveries in the scientific or patent literature often lags behind actual discoveries, we cannot be certain of the priority of inventions covered by pending patent applications. Moreover, we may have to participate in interference proceedings declared by the U.S. Patent and Trademark Office to determine priority of invention, in opposition proceedings in a foreign patent office, or in a post-grant challenge proceeding such as an ex parte reexamination or inter partes review at the U.S. Patent and Trademark Office, any of which could result in substantial cost to us, even if the eventual outcome is favorable. There can be no assurance that a court of competent jurisdiction would hold any claims in any issued patent to be valid and enforceable. An adverse outcome could subject us to significant liabilities to third parties, require disputed rights to be licensed from third parties or require us to cease using such technology.

We own the clinical development program of rNAPc2, including Phase 2b clinical trials. If rNAPc2 is successfully developed, we believe it will have intellectual property protection for a specific use, including 12 years of market exclusivity as an innovative biologic product under FDA law in the United States, 10 years data protection exclusivity in the EU, and potentially patent protection in addition to this. However, another competitor could develop a compound with similar biological properties to rNAPc2 that may not be barred by our exclusivity. We have also filed a patent application for rNAPc2 and its use for COVID-19 disease, but there is no assurance that this application will ultimately result in an issued patent.

Regardless of merit, the listing of patents in the FDA Orange Book for Gencaro may be challenged as being improperly listed. We may have to defend against such claims and possible associated antitrust issues. We could also incur substantial costs in seeking to enforce our proprietary rights against infringement.

While the composition of matter patents on the compound that comprises Gencaro have expired, we hold intellectual property concerning the interaction of Gencaro with the polymorphisms of the beta-1 and alpha-2C receptors. We have obtained patents that claim methods involving Gencaro after a patient’s receptor genotype has been determined. We anticipate that any NDA for Gencaro will request a label including a claim that efficacy varies based on receptor genotype and a recommendation in the prescribing information that prospective patients be tested for their receptor genotype. We believe that under applicable law, a generic bucindolol label would likely be required to include this recommendation as it pertains directly to the safe or efficacious use of the drug. Such a label may be considered as inducing infringement, carrying the same liability as direct infringement. If the label with the genotype information for Gencaro is not approved or it is approved after the relevant patents expire, or if generic labels are not required to copy the approved label, competitors could have an easier path to introduce competing products and our business may suffer. The approved label may not contain language covered by the patents, or we may be unsuccessful in enforcing them.

We also have obtained intellectual property related to the use of Gencaro for various cardiovascular indications in the genetic population we plan to study in Phase 3. The approved label may not contain language covered by our patents and it is possible the intellectual property may not preclude others from commercializing a generic version of Gencaro, which could cause our business to suffer. Additionally, the patents may be invalidated and/or we may be unsuccessful in enforcing them.

We may not be able to effectively protect our intellectual property rights in some foreign countries, as our patents are limited by jurisdiction and many countries do not offer the same level of legal protection for intellectual property as the United States.

We require our employees, consultants, business partners and members of our scientific advisory board to execute confidentiality agreements upon the commencement of employment, consulting or business relationships with us. These agreements provide that all confidential information developed or made known during the course of the relationship with us be kept confidential and not disclosed to third parties except in specific circumstances. In the case of employees, the agreements provide that all inventions resulting from work performed for us, utilizing the property or relating to our business and conceived or completed by the individual during employment shall be our exclusive property to the extent permitted by applicable law.

Third parties may breach these and other agreements with us regarding our intellectual property and we may not have adequate remedies for the breach. Third parties could also fail to take necessary steps to protect our licensed intellectual property, which could seriously harm our intellectual property position.

If we are not able to protect our proprietary technology, trade secrets and know-how, then our competitors may develop competing products. Any issued patent may not be sufficient to prevent others from competing with us. Further, we have trade secrets relating to rNAPc2 and Gencaro, and such trade secrets may become known or independently discovered. Our issued patents and those that may issue in the future, or those licensed to us, may be challenged, opposed, invalidated or circumvented, which could allow competitors to market similar products or limit the patent protection term of our product candidates. All of these factors may affect our competitive position.

If the manufacture, use or sale of our products infringe on the intellectual property rights of others, we could face costly litigation, which could cause us to pay substantial damages or licensing fees and limit our ability to sell some or all of our products.

Extensive litigation regarding patents and other intellectual property rights has been common in the biopharmaceutical industry. Litigation may be necessary to assert infringement claims, enforce patent rights, protect trade secrets or know-how and determine the enforceability, scope and validity of certain proprietary rights. Litigation may even be necessary to defend disputes of inventorship or ownership of proprietary rights. The defense and prosecution of intellectual property lawsuits, U.S. Patent and Trademark Office interference proceedings, and related legal and administrative proceedings (e.g., a reexamination, inter partes review, or post-grant review) in the United States and internationally involve complex legal and factual questions. As a result, such proceedings are costly and time-consuming to pursue, and their outcome is uncertain.

Regardless of merit or outcome, our involvement in any litigation, interference or other administrative proceedings could cause us to incur substantial expense and could significantly divert the efforts of our technical and management personnel. Any public announcements related to litigation or interference proceedings initiated or threatened against us could cause our stock price to decline. Adverse outcomes in patent litigation may potentially subject us to antitrust litigation which, regardless of the outcome, would adversely affect our business. An adverse determination may subject us to the loss of our proprietary position or to significant liabilities, or require us to seek licenses that may include substantial cost and ongoing royalties. Licenses may not be available from third parties, or may not be obtainable on satisfactory terms. An adverse determination or a failure to obtain necessary licenses may restrict or prevent us from manufacturing and selling our products, if any. These outcomes could materially harm our business, financial condition and results of operations.

Risks Related to Ownership of Our Common Stock and Stock Price Volatility

Our stock price has been and is expected to be volatile.

Our common stock has in the past been and in the future could be subject to significant fluctuations. Market prices for securities of early-stage pharmaceutical, biotechnology and other life sciences companies have historically been particularly volatile. Some of the factors that may cause the market price of our common stock to fluctuate include:

•

failure to complete, or delays in completing the Merger;

•

the regulatory status of Gencaro, rNAPc2 and the genetic test, and whether and when they are approved for sale, if at all, and the labeling or other conditions of use imposed by the FDA;

•

our ability to secure additional funding or complete a strategic transaction or to complete development of and commercialize Gencaro or rNAPc2;

•

progress of any future clinical trials for Gencaro, rNAPc2 or our other product candidate, including enrollment and any data that may become available;

•

the results of our future clinical trials and any future NDAs of our current and future product candidates;

•

the entry into, or termination of, key agreements, including key strategic alliance agreements;

•

the results and timing of regulatory reviews relating to our product candidates;

•

failure of any of our product candidates, if approved, to achieve commercial success;

•

general and industry-specific economic conditions that may affect our research and development expenditures;

•

the results of clinical trials conducted by others on drugs that would compete with our product candidates;

•

issues in manufacturing or testing our product candidates or any approved products;

•

the initiation of or material developments in or the conclusion of litigation to enforce or defend any of our intellectual property rights;

•

the loss of key employees;

•

the introduction of technological innovations or new commercial products by our competitors;

•

changes in estimates or recommendations by securities analysts, if any, who cover our common stock;

•

future sales of our common stock;

•

changes in the structure of health care payment systems;

•

period-to-period fluctuations in our financial results; and

•

our ability to retain the listing of our common stock on the Nasdaq Capital Market.

Moreover, the stock markets in general have experienced substantial volatility that has often been unrelated to the operating performance of individual companies, including as a result of deteriorating market conditions due to investor concerns regarding inflation, adverse developments affecting the financial services industry, continued hostilities between Russia and Ukraine and Hamas' attack against Israel and the ensuing conflict. These broad market fluctuations may also adversely affect the trading price of our common stock. In the past, following periods of volatility in the market price of a company’s securities, stockholders have often instituted class action securities litigation against those companies. Such litigation, if instituted, could result in substantial costs and diversion of management attention and resources, which could significantly harm our profitability and reputation.

Future sales or the possibility of future sales of our common stock may depress the market price of our common stock.

Sales in the public market of substantial amounts of our common stock could depress prevailing market prices of our common stock. As of June 30, 2024, approximately 14.5 million shares of common stock were outstanding, and all of these shares are freely transferable without restriction or further registration under the Securities Act of 1933, as amended (the “Securities Act”) except for shares held by our directors, officers and other affiliates and unregistered shares held by non-affiliates. The sale of these additional shares, or the perception that such sales may occur, could depress the market price of our common stock.

As of June 30, 2024, there were approximately 607,000 shares of our common stock which may be issued upon the exercise of outstanding stock options, and we anticipate that we will continue to issue stock option and restricted stock unit awards to our employees and consultants in the fiscal year ended December 31, 2024 and thereafter. If and when these options are exercised, such shares will be available for sale in the open market without further registration under the Securities Act. The existence of these outstanding options may negatively affect our ability to complete future equity financings at acceptable prices and on acceptable terms. The exercise of those options, and the prompt resale of shares of our common stock received, may also result in downward pressure on the price of our common stock.

In the absence of a significant strategic transaction, we will need to raise significant additional capital to finance the research, development and commercialization of Gencaro, rNAPc2 and our other product candidate. If future securities offerings occur, they would dilute our current stockholders’ equity interests and could reduce the market price of our common stock.

We do not expect to pay cash dividends, and accordingly, stockholders must rely on stock appreciation for any return on their investment.

We have never paid cash dividends on any of our capital stock. As a result, other than the potential special cash dividend described below, only appreciation of the price of our common stock will provide a return to stockholders. Investors seeking cash dividends should not invest in our common stock. In addition, pursuant to the terms of the Merger Agreement, we may declare and pay a special cash dividend to our stockholders of record prior to the closing of the Merger consisting of cash up to an amount equal in the aggregate of the amount by which our net cash will exceed $5.0 million. See, “We have never paid and, other than in connection with the Merger with Oruka, do not intend to pay any cash dividends in the foreseeable future” for further discussion on the special cash dividend.

Our business could be negatively affected as a result of actions of activist shareholders.

Responding to actions by activist shareholders could be costly and time-consuming, disrupt our operations and divert the attention of management and our employees. For example, in connection with the negotiation and entry into a cooperation agreement in June 2022 with Cable Car Capital LLC, The Funicular Fund, LP, Funicular Funds, LP and Jacob Ma-Weaver, collectively, Cable Car, one of our stockholders, we appointed two new directors in 2022. Activist shareholders may advocate for certain governance and strategic changes at our company. In the event of stockholder activism, particularly with respect to matters which our board of directors, in exercising their fiduciary duties, disagree with or have determined not to pursue, our business could be adversely affected because responding to actions by activist stockholders can be costly and time-consuming, disrupting our operations and diverting the attention of management, and perceived uncertainties as to our future direction may result in the loss of potential business opportunities and may make it more difficult to attract and retain qualified personnel, business partners, and customers.

Additionally, if faced with a consent solicitation or proxy contest, we may not be able to respond successfully to the contest or dispute, which would be disruptive to our business. If individuals are elected to our board of directors with a differing agenda, our ability to effectively and timely implement our strategic plan and create additional value for our stockholders may be adversely affected. In addition, our share price could experience periods of increased volatility as a result of shareholder activism.

We have implemented anti-takeover provisions that could discourage, prevent or delay a takeover, even if the acquisition would be beneficial to our stockholders.

Provisions of our certificate of incorporation and bylaws, as well as provisions of Delaware law, could make it more difficult for a third party to acquire us, even if doing so would benefit our stockholders. These provisions:

•

establish a classified board of directors so that not all members of our board may be elected at one time;

•

authorize the issuance of up to approximately 5 million additional shares of preferred stock that could be issued by our board of directors to increase the number of outstanding shares and hinder a takeover attempt;

•

limit who may call a special meeting of stockholders;

•

prohibit stockholder action by written consent, thereby requiring all stockholder actions to be taken at a meeting of our stockholders; and

•

establish advance notice requirements for nominations for election to our board of directors or for proposing matters that can be acted upon at a stockholder meeting.

Specifically, our certificate of incorporation provides that all stockholder action must be effected at a duly called meeting and not by a written consent. The bylaws provide, however, that our stockholders may call a special meeting of stockholders only upon a request of stockholders owning at least 50% of our outstanding common stock. These provisions of our certificate of incorporation and bylaws could discourage potential acquisition proposals and could delay or prevent a change in control. We designed these provisions to reduce our vulnerability to unsolicited acquisition proposals and to discourage certain tactics that may be used in proxy fights. These provisions, however, could also have the effect of discouraging others from making tender offers for our shares. As a consequence, they also may inhibit fluctuations in the market price of our shares that could result from actual or rumored takeover attempts. Such provisions also may have the effect of preventing changes in our management.

We are permitted to issue shares of our preferred stock without stockholder approval upon such terms as our board of directors determines. Therefore, the rights of the holders of our common stock are subject to, and may be adversely affected by, the rights of the holders of our preferred stock that may be issued in the future. In addition, the issuance of preferred stock could have a dilutive effect on the holdings of our current stockholders.

We are subject to the Delaware anti-takeover laws regulating corporate takeovers. These anti-takeover laws prevent a Delaware corporation from engaging in a merger or sale of more than 10% of its assets with any stockholder, including all affiliates and associates of the stockholder, who owns 15% or more of the corporation’s outstanding voting stock, for three years following the date that the stockholder acquired 15% or more of the corporation’s stock unless:

•

the board of directors approved the transaction where the stockholder acquired 15% or more of the corporation’s stock;

•

after the transaction in which the stockholder acquired 15% or more of the corporation’s stock, the stockholder owned at least 85% of the corporation’s outstanding voting stock, excluding shares owned by directors, officers and employee stock plans in which employee participants do not have the right to determine confidentially whether shares held under the plan will be tendered in a tender or exchange offer; or

•

on or after this date, the merger or sale is approved by the board of directors and the holders of at least two-thirds of the outstanding voting stock that is not owned by the stockholder.

The provisions of our governing documents and current Delaware law may, collectively:

•

lengthen the time required for a person or entity to acquire control of us through a proxy contest for the election of a majority of our board of directors;

•

discourage bids for our common stock at a premium over market price; and

•

generally deter efforts to obtain control of us.

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

Not applicable.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

Not applicable.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

ITEM 5. OTHER INFORMATION

Securities Trading Plans of Directors and Executive Officers

During our last fiscal quarter, no director or officer, as defined in Rule 16a-1(f), adopted or terminated a “Rule 10b5-1 trading arrangement” or a “non-Rule 10b5-1 trading arrangement,” each as defined in Item 408 of Regulation S-K.

ITEM 6. EXHIBITS

EXHIBIT INDEX

The following documents are filed as part of this quarterly report on Form 10-Q. The Company will furnish a copy of any exhibit listed to requesting stockholders upon payment of the Company’s reasonable expenses in furnishing those materials.

     
    Incorporated by Reference (1)

    Exhibit
No.

    Description 

    Form

    Filing
Date

    Number

    Filed
Herewith

     
    2.1*

    Agreement and Plan of Merger and Reorganization, dated as of April 2, 2024, by and among ARCA biopharma, Inc., Atlas Merger Sub Corp. and Oruka Therapeutics, Inc.

    8-K

    4/3/2024

    2.1

    
3.1

Amended and Restated Certificate of Incorporation of the Registrant, as amended.

10-K

3/27/2009

3.1

    
3.1(a)

Certificate of Amendment to Restated Certificate of Incorporation.
 
8-K

3/5/2013

5.1

     
3.1(b)

Certificate of Amendment to Restated Certificate of Incorporation.
 
8-K

9/3/2015

3.1

     
3.1(c)

Certificate of Amendment to Restated Certificate of Incorporation.
 
8-K

4/3/2019

3.1

    
3.2

Amended and Restated Bylaws of the Registrant, as amended.

8-K

6/28/2021

3.1

     
    3.3

    Form of Certificate of Designation of Preferences, Rights and Limitations of Series A Convertible Preferred Stock.

    S-1/A

    5/24/2013

    3.1(b)

     
    3.4

    Form of Certificate of Designation of Preferences, Rights and Limitations of Series B Non-Voting Convertible Preferred Stock

    8-K

    4/3/2024

    3.1

     
4.1

Form of Common Stock Certificate.

    8-K

    1/28/2009

    4.1

     
4.2

Form of Common Stock Certificate.

10-Q

5/8/2019

4.2

     
    10.1

    Form of Oruka Support Agreement

    8-K

    4/3/2024

    10.1

     
    10.2*

    Form of Oruka Subscription Agreement

    8-K

    4/3/2024

    10.2

     
    10.3*

    Form of Amendment to Oruka Subscription Agreement

    8-K

    7/9/2024

    10.1

     
    10.4*

    Form of Amended and Restated Oruka Subscription Agreement

    8-K

    7/9/2024

    10.2

     
    10.5

    Form of the Registrant's Support Agreement

    8-K

    4/3/2024

    10.3

     
    10.6

    Form of Lock-Up Agreement 

    8-K

    4/3/2024

    10.4

     
    10.7

    Separation Agreement and Release, by and between ARCA and Michael Bristow, dated as of April 3, 2024.

    8-K

    4/4/2024

    10.1

     
    10.8**

    Consulting Agreement, by and between ARCA and Michael Bristow, dated as of April 3, 2024.

    8-K

    4/4/2024

    10.2

     
    10.9

    Second Amendment to Retention Bonus Letter, dated April 22, 2024, by and between ARCA biopharma, Inc. and Thomas A. Keuer.

    8-K

    4/23/2024

    10.1

     
    10.10

    Second Amendment to Retention Bonus Letter, dated April 22, 2024, by and between ARCA biopharma, Inc. and C. Jeffrey Dekker.

    8-K

    4/23/2024

    10.2

     
    10.11

    First Amendment to Office Lease Agreement, dated March 19, 2024, by and between the Registrant and Lotus Church Ranch, LLC.

    8-K

    3/22/2024

    10.1

     
    Incorporated by Reference (1)

    Exhibit
No.

    Description 

    Form

    Filing
Date

    Number

    Filed
Herewith

     
31.1

Certification of Principal Executive Officer pursuant to Rule 13a-14(a) or 15d-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

X

     
31.2

Certification of Principal Financial Officer pursuant to Rule 13a-14(a) or 15d-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

X

     
32.1

Certification of Principal Executive Officer and Principal Financial Officer pursuant to 18 U.S.C. sec. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

X

     
101.INS

Inline XBRL Instance Document – the instance document does not appear in the Interactive Data File because XBRL tags are embedded within the Inline XBRL document

X

     
101.SCH

Inline XBRL Taxonomy Extension Schema with Embedded Linkbase Documents (filed electronically herewith)

X

     
104

Cover Page Interactive Data File (embedded within the Inline XBRL document).

(1)

The SEC file number for all items incorporated by reference herein from reports on Forms 10-K, 10-Q and 8-K is 000-22873.

* Exhibits and/or schedules have been omitted pursuant to Item 601(a)(5) of Regulation S-K. The registrant hereby undertakes to furnish supplementally copies of any of the omitted exhibits and schedules upon request by the SEC; provided, however, that the registrant may request confidential treatment pursuant to Rule 24b-2 under the Exchange Act for any exhibits or schedules so furnished.

** Certain portions of this exhibit (indicated by “[***]”) have been omitted because they are both (i) not material and (ii) would be competitively harmful if publicly disclosed.

SIGNATURE

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 hereunto duly authorized.


ARCA biopharma, Inc. (Registrant)

By:		/s/ C. Jeffrey Dekker
		C. Jeffrey Dekker
		Chief Financial Officer (Principal Financial and Accounting Officer)

Dated: August 1, 2024

Exhibit 31.1

CERTIFICATION

I, Thomas A. Keuer, certify that:

1. I have reviewed this quarterly report on Form 10-Q of ARCA biopharma, 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:

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;

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;

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

Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

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

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: August 1, 2024

    /s/ Thomas A. Keuer

   

    Thomas A. Keuer

   

    President and Chief Operating Officer

   

    (Principal Executive Officer)

   

Exhibit 31.2

CERTIFICATION

I, C. Jeffrey Dekker, certify that:

1. I have reviewed this quarterly report on Form 10-Q of ARCA biopharma, Inc.;

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: August 1, 2024

    /s/ C. Jeffrey Dekker

   

    C. Jeffrey Dekker

   

    Chief Financial Officer
(Principal Financial and Accounting Officer)

Exhibit 32.1

ARCA BIOPHARMA, INC.

CERTIFICATION PURSUANT TO

18 U.S.C. SEC. 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

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), Thomas A. Keuer, President and Chief Operating Officer of ARCA biopharma, Inc. (the "Company"), and C. Jeffrey Dekker, Chief Financial Officer of the Company, each hereby certifies that, to the best of his/her knowledge:

(1)

The Company's Quarterly Report on Form 10-Q for the period ended June 30, 2024, to which this Certification is attached as Exhibit 32.1 (the "Periodic Report") fully complies with the requirements of section 13(a) or 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.

In Witness Whereof, the undersigned have set their hands hereto as of the 1st day of August, 2024.



/s/ Thomas A. Keuer				/s/ C. Jeffrey Dekker

Thomas A. Keuer				C. Jeffrey Dekker
President and Chief Operating Officer (Principal Executive Officer)				Chief Financial Officer (Principal Financial and Accounting Officer)

A signed original of this written statement required by Section 906 of the Public Company Accounting Reform and Investor Protection Act of 2002 (18 U.S.C. § 1350, as adopted) has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request. This certification accompanies the Form 10-Q 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 ARCA biopharma, 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 Form 10-Q), irrespective of any general incorporation language contained in such filing.