Description of the Business	9 Months Ended
Sep. 30, 2023
Accounting Policies [Abstract]
Description of the Business	1. Description of the Business Peak Bio, Inc., together with its consolidated subsidiaries (the “Company” or “Peak Bio”), is a clinical-stage biotechnology company focused on discovering, developing and delivering innovative therapies for multiple therapeutic areas. The Company has established a portfolio of potential therapies focused on cancer and immunological diseases. The Company’s pipeline includes the PHP-303 program for genetic disease, liver disease and inflammation, specifically for Alpha-1 antitrypsin deficiency (AATD) and acute respiratory distress syndrome (ARDS) including COVID-19. The Company’s pipeline also includes PH-1 ADC Platform for oncology. The accompanying condensed consolidated financial statements and notes have been prepared to include certain assets and liabilities of pH Pharma Co., Ltd (now Peak Bio Co., Ltd. or “Peak Bio”) (sometimes referred to as “pH Pharma Ltd” prior to the Spin-Off described below), on the basis described within Note 2, with certain wholly-owned subsidiaries of Peak Bio, that were included following the Spin-Off as follows: Ph Pharma, Inc, as well as certain assets and liabilities allocated to Peak Bio, including the PHP- 303 and PH-1 ADC Platform programs. The spin-off (the “Spin-Off”) of certain assets of pH Pharma Co., Ltd. was completed on March 1, 2022, prior to the execution of the Business Combination Agreement (as defined below) with Ignyte Acquisition Corp. (“Ignyte”), with Peak Bio retaining the PHP-303 and PH-1 ADC Platform programs. Historically and throughout the periods presented, the PHP-303 and PH-1 ADC Platform programs have been owned by pH Pharma Co., Ltd and its subsidiaries (prior to the change of its name to Peak Bio Co., Ltd.). As of September 30, 2023, the Company’s wholly owned subsidiary was Peak Bio Co., Ltd., organized under the laws of the Republic of Korea, and its subsidiary Peak Bio CA, Inc., organized under the laws of California. Business Combination On November 1, 2022 (the “Closing Date”), the Company completed the transactions contemplated by that certain business combination agreement, dated as of April 28, 2022 (the “Business Combination Agreement”), by and among Ignyte Acquisition Corp. (“Ignyte”), Ignyte Korea Co., Ltd., a corporation organized under the laws of the Republic of Korea (“Korean Sub”), and Peak Bio Co., Ltd. At the closing of the transactions, (i) the stockholders of Peak Bio Co., Ltd. transferred their respective shares of common stock to Korean Sub in exchange for shares of Ignyte common stock, and (ii) in the course of such share swap, Korean Sub distributed the shares of Peak Bio Co., Ltd. common stock to Ignyte in consideration of Ignyte common stock (which was in-turn delivered to the stockholders of Peak Bio Co., Ltd. as described in (i) above ((i) and (ii), collectively, the “Share Swap”). Upon consummation of the Share Swap, Peak Bio Co., Ltd. became a direct wholly-owned subsidiary of Ignyte. The transactions contemplated by the Business Combination Agreement are referred to herein as the “Business Combination.” Upon the closing of the Business Combination, Ignyte as the registrant changed its name to “Peak Bio, Inc.” Risks and Uncertainties The Company relies, and expects to continue to rely, on a small number of vendors to provide services, supplies and materials related to its research and development programs. These research and development programs could be adversely affected by a significant interruption in these services or the availability of materials. Results of operations may be adversely affected by various factors that could cause economic uncertainty and volatility in the financial markets, many of which are beyond the Company’s control. The Company’s business could be impacted by, among other things, downturns in the financial markets or in economic conditions, inflation, increases in interest rates, and geopolitical instability, such as the military conflicts in Ukraine and the Israel-Hamas war. The Company cannot at this time fully predict the likelihood of one or more of the above events, their duration or magnitude or the extent to which they may negatively impact the Company’s business. Akari Merger Agreement On March 4, 2024, we entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Akari Therapeutics, Plc, a public company limited by shares incorporated in England and Wales (“Akari”), and Pegasus Merger Sub, Inc., a Delaware corporation and a wholly-owned subsidiary of Akari (“Merger Sub”), pursuant to which, upon the terms and subject to the conditions thereof, Merger Sub will be merged with and into Peak Bio (the “Merger”), with Peak Bio surviving the Merger as a wholly-owned subsidiary of Akari. Pursuant to the Merger Agreement, and upon the terms and subject to the conditions thereof, at the effective time of the Merger (the “Effective Time”), each issued and outstanding share of Common Stock (other than (x) shares of Common Stock held by us as treasury stock, or shares of Common Stock owned by Akari, Merger Sub or any direct or indirect wholly-owned subsidiaries of Akari and (y) Dissenting Shares (as defined in the Merger Agreement)), will be converted into the right to receive Akari American Depositary Shares (“Akari ADSs”) representing a number of Akari ordinary shares, par value $0.0001 per share (the “Akari Ordinary Shares”), equal to an exchange ratio calculated in accordance with the Merger Agreement (the “Exchange Ratio”), each such share duly and validly issued against the deposit of the requisite number of Akari Ordinary Shares in accordance with the Deposit Agreement (as defined in the Merger Agreement). The Exchange Ratio will be calculated such that the total number of shares of Akari ADSs to be issued as merger consideration for the Peak Common Stock will be expected to be, upon issuance, approximately 50% of the outstanding shares of Akari ADSs (provided, certain adjustments to this ratio will be made in respect of the net cash, as determined in accordance with the Merger Agreement, of each of Peak Bio and Akari at the close of business one business day prior to the anticipated consummation of the Merger). The Merger Agreement provides that, under certain circumstances, additional Akari ADSs may be issued to the holders of shares of Peak Common Stock following the consummation of the Merger equal to an exchange ratio calculated in accordance with the Merger Agreement (the “Additional Exchange Ratio”). At the Effective Time, each warrant to purchase capital stock of Peak Bio (“Peak Warrant”) outstanding immediately prior to the Effective Time will be converted into and exchangeable for warrants to purchase a number of Akari Ordinary Shares or Akari ADSs, as determined by Akari (each, an “Adjusted Warrant”), on substantially similar terms and subject to substantially similar conditions as were applicable to such Peak Warrant immediately prior to the Effective Time, except (i) for terms rendered inoperative by reason of the transactions contemplated by the Merger Agreement, (ii) as provided in the following sentence and (iii) such amendments to the terms of the Adjusted Warrants as are necessary to comply with applicable Law (as defined in the Merger Agreement). The number of Akari Ordinary Shares (or the number of Akari Ordinary Shares underlying Akari ADSs, as applicable) subject to each Adjusted Warrant will be equal to the number of shares of Peak Common Stock issuable upon exercise of such Peak Warrant immediately prior to the Effective Time multiplied by the Exchange Ratio, with any fractional Akari Ordinary Shares or Akari ADSs rounded down to the nearest whole Akari Ordinary Share or Akari ADS, as applicable, and the exercise price with respect to each Akari Ordinary Share (or each Akari Ordinary Share underlying Akari ADSs, as applicable) underlying such Adjusted Warrant will be equal to the exercise price of such Peak Warrant immediately prior to the Effective Time divided by the Exchange Ratio. The grant of the Adjusted Warrants will be effected as of the Effective Time, or as soon thereafter as is reasonably practicable, taking into account Parent’s administrative procedures. The Adjusted Warrants will be further adjusted, if applicable, to give effect to the impact of the Additional Exchange Ratio. Each option to acquire shares of Peak Common Stock (“Peak Option”) that is outstanding and unexercised immediately prior to the Effective Time, whether or not vested, will be assumed and converted into an option to purchase a number of Akari ordinary shares or Akari ADSs, as determined by Akari (each, an “Adjusted Option”). The number of Akari Ordinary Shares (or the number of Akari Ordinary Shares underlying Akari ADSs, as applicable) subject to the Adjusted Option will be equal to the product of (i) the total number of shares of Peak Common Stock subject to such Peak Option immediately prior to the Effective Time multiplied by (ii) the Exchange Ratio, with any fractional Akari Ordinary Shares or Akari ADSs rounded down to the nearest whole Akari Ordinary Share or Akari ADS, as applicable, and the exercise price per share of each Adjusted Option will be equal to the exercise price of such Peak Option immediately prior to the Effective Time divided by the Exchange Ratio. The Adjusted Options will be further adjusted, if applicable, to give effect to the impact of the Additional Exchange Ratio. Voting Agreements Concurrently with the Merger Agreement, we and Akari entered into voting and support agreements (the “Voting Agreements”) with certain stockholders of Peak Bio (the “Peak Stockholders”) and certain shareholders of Akari (the “Akari Shareholders” and, together with the Peak Stockholders, the “Supporting Holders”). The Supporting Holders have agreed to, among other things, vote their shares in favor of the Merger Agreement and the Merger or the issuance of Akari Ordinary Shares in connection therewith, as applicable, in accordance with the recommendation of the respective boards of directors of Peak Bio and Akari. Bylaws Amendment In connection with the execution of the Merger Agreement, on March 3, 2024, our Board approved an amendment to our Amended and Restated Bylaws (the “Bylaws Amendment”), which became effective immediately. The Bylaws Amendment requires that, unless we consent in writing to the selection of an alternative forum, the sole and exclusive forum for (i) any derivative action or proceeding brought on behalf of the Company, (ii) any action asserting a claim of breach of a fiduciary duty owed by any director, officer, employee or stockholder (including a beneficial owner) of the Company or the Company’s stockholders, (iii) any action asserting a claim against any director, officer, employee or stockholder (including a beneficial owner) of the Company arising under any provision of the Delaware General Corporation Law (“DGCL”) or the bylaws or the certificate of incorporation of the Company, or (iv) any action asserting a claim governed by the internal affairs doctrine shall, to the fullest extent permitted by law, be the Court of Chancery of the State of Delaware (or if the Court of Chancery for the State of Delaware does not have jurisdiction, a state court located within the State of Delaware or, if no state court located within the State of Delaware has subject matter jurisdiction, the federal district court for the District of Delaware). In addition, the Bylaws Amendment provides that unless the Company consents in writing to the selection of an alternative forum, the federal district courts of the United States shall be the exclusive forum for the resolution of any claim or cause of action arising under the Securities Act of 1933, as amended. Going Concern Since inception, the Company has incurred significant net losses. The Company incurred net losses of $12.3 million and $6.3 million for the nine months ended September 30, 2023 and 2022, respectively. The Company had not initially been capitalized with sufficient funding to conduct its operations. Since the Company had no available cash or credit facilities, the Company was dependent upon Peak Bio Co., Ltd. (formerly pH Pharma Ltd) and its affiliates to provide services and funding to support the operations of the Company through the closing of the Business Combination. The Company expects to incur significant expenses and operating losses for the foreseeable future as it continues its efforts to identify product candidates and seek regulatory approvals within its portfolio. The Company will need additional capital to fund its planned Merger with Akari. The Company plans to raise this additional funding through the sale of equity, debt financings or other capital sources, as detailed in Note 14. The Company may be unable to raise additional funds or enter into such other arrangements when needed on favorable terms, or at all. There can be no assurances that other sources of financing would be available. Due to these uncertainties, there is substantial doubt about the Company’s ability to continue as a going concern. The accompanying condensed consolidated financial statements have been prepared assuming that the Company will continue as a going concern. The condensed consolidated financial statements do not include any adjustments relating to the recoverability and classification of recorded asset amounts or classification of liabilities that might result from the outcome of the uncertainties discussed above. The Company’s future operations are highly dependent on a combination of factors, including (i) the timely and successful completion of additional financing and the Akari Merger as discussed above; (ii) the success of its research and development programs; (iii) the development of competitive therapies by other biotechnology and pharmaceutical companies; (iv) the Company’s ability to manage growth of the organization; (v) the Company’s ability to protect its proprietary technology; and ultimately (vi) regulatory approval and market acceptance of the Company’s product candidates.

Description of the Business

9 Months Ended

Sep. 30, 2023

Peak Bio, Inc., together with its consolidated subsidiaries (the “Company” or “Peak Bio”), is a clinical-stage biotechnology company focused on discovering, developing and delivering innovative therapies for multiple therapeutic areas. The Company has established a portfolio of potential therapies focused on cancer and immunological diseases. The Company’s pipeline includes the PHP-303 program for genetic disease, liver disease and inflammation, specifically for Alpha-1 antitrypsin deficiency (AATD) and acute respiratory distress syndrome (ARDS) including COVID-19. The Company’s pipeline also includes PH-1 ADC Platform for oncology.

The accompanying condensed consolidated financial statements and notes have been prepared to include certain assets and liabilities of pH Pharma Co., Ltd (now Peak Bio Co., Ltd. or “Peak Bio”) (sometimes referred to as “pH Pharma Ltd” prior to the Spin-Off described below), on the basis described within Note 2, with certain wholly-owned subsidiaries of Peak Bio, that were included following the Spin-Off as follows: Ph Pharma, Inc, as well as certain assets and liabilities allocated to Peak Bio, including the PHP- 303 and PH-1 ADC Platform programs.

The spin-off (the “Spin-Off”) of certain assets of pH Pharma Co., Ltd. was completed on March 1, 2022, prior to the execution of the Business Combination Agreement (as defined below) with Ignyte Acquisition Corp. (“Ignyte”), with Peak Bio retaining the PHP-303 and PH-1 ADC Platform programs. Historically and throughout the periods presented, the PHP-303 and PH-1 ADC Platform programs have been owned by pH Pharma Co., Ltd and its subsidiaries (prior to the change of its name to Peak Bio Co., Ltd.).

As of September 30, 2023, the Company’s wholly owned subsidiary was Peak Bio Co., Ltd., organized under the laws of the Republic of Korea, and its subsidiary Peak Bio CA, Inc., organized under the laws of California.

Business Combination

On November 1, 2022 (the “Closing Date”), the Company completed the transactions contemplated by that certain business combination agreement, dated as of April 28, 2022 (the “Business Combination Agreement”), by and among Ignyte Acquisition Corp. (“Ignyte”), Ignyte Korea Co., Ltd., a corporation organized under the laws of the Republic of Korea (“Korean Sub”), and Peak Bio Co., Ltd. At the closing of the transactions, (i) the stockholders of Peak Bio Co., Ltd. transferred their respective shares of common stock to Korean Sub in exchange for shares of Ignyte common stock, and (ii) in the course of such share swap, Korean Sub distributed the shares of Peak Bio Co., Ltd. common stock to Ignyte in consideration of Ignyte common stock (which was in-turn delivered to the stockholders of Peak Bio Co., Ltd. as described in (i) above ((i) and (ii), collectively, the “Share Swap”). Upon consummation of the Share Swap, Peak Bio Co., Ltd. became a direct wholly-owned subsidiary of Ignyte. The transactions contemplated by the Business Combination Agreement are referred to herein as the “Business Combination.” Upon the closing of the Business Combination, Ignyte as the registrant changed its name to “Peak Bio, Inc.”

Risks and Uncertainties

The Company relies, and expects to continue to rely, on a small number of vendors to provide services, supplies and materials related to its research and development programs. These research and development programs could be adversely affected by a significant interruption in these services or the availability of materials. Results of operations may be adversely affected by various factors that could cause economic uncertainty and volatility in the financial markets, many of which are beyond the Company’s control. The Company’s business could be impacted by, among other things, downturns in the financial markets or in economic conditions, inflation, increases in interest rates, and geopolitical instability, such as the military conflicts in Ukraine and the Israel-Hamas war. The Company cannot at this time fully predict the likelihood of one or more of the above events, their duration or magnitude or the extent to which they may negatively impact the Company’s business.

Akari Merger Agreement

On March 4, 2024, we entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Akari Therapeutics, Plc, a public company limited by shares incorporated in England and Wales (“Akari”), and Pegasus Merger Sub, Inc., a Delaware corporation and a wholly-owned subsidiary of Akari (“Merger Sub”), pursuant to

which, upon the terms and subject to the conditions thereof, Merger Sub will be merged with and into Peak Bio (the “Merger”), with Peak Bio surviving the Merger as a wholly-owned subsidiary of Akari.

Pursuant to the Merger Agreement, and upon the terms and subject to the conditions thereof, at the effective time of the Merger (the “Effective Time”), each issued and outstanding share of Common Stock (other than (x) shares of Common Stock held by us as treasury stock, or shares of Common Stock owned by Akari, Merger Sub or any direct or indirect wholly-owned subsidiaries of Akari and (y) Dissenting Shares (as defined in the Merger Agreement)), will be converted into the right to receive Akari American Depositary Shares (“Akari ADSs”) representing a number of Akari ordinary shares, par value $0.0001 per share (the “Akari Ordinary Shares”), equal to an exchange ratio calculated in accordance with the Merger Agreement (the “Exchange Ratio”), each such share duly and validly issued against the deposit of the requisite number of Akari Ordinary Shares in accordance with the Deposit Agreement (as defined in the Merger Agreement). The Exchange Ratio will be calculated such that the total number of shares of Akari ADSs to be issued as merger consideration for the Peak Common Stock will be expected to be, upon issuance, approximately 50% of the outstanding shares of Akari ADSs (provided, certain adjustments to this ratio will be made in respect of the net cash, as determined in accordance with the Merger Agreement, of each of Peak Bio and Akari at the close of business one business day prior to the anticipated consummation of the Merger). The Merger Agreement provides that, under certain circumstances, additional Akari ADSs may be issued to the holders of shares of Peak Common Stock following the consummation of the Merger equal to an exchange ratio calculated in accordance with the Merger Agreement (the “Additional Exchange Ratio”).

At the Effective Time, each warrant to purchase capital stock of Peak Bio (“Peak Warrant”) outstanding immediately prior to the Effective Time will be converted into and exchangeable for warrants to purchase a number of Akari Ordinary Shares or Akari ADSs, as determined by Akari (each, an “Adjusted Warrant”), on substantially similar terms and subject to substantially similar conditions as were applicable to such Peak Warrant immediately prior to the Effective Time, except (i) for terms rendered inoperative by reason of the transactions contemplated by the Merger Agreement, (ii) as provided in the following sentence and (iii) such amendments to the terms of the Adjusted Warrants as are necessary to comply with applicable Law (as defined in the Merger Agreement). The number of Akari Ordinary Shares (or the number of Akari Ordinary Shares underlying Akari ADSs, as applicable) subject to each Adjusted Warrant will be equal to the number of shares of Peak Common Stock issuable upon exercise of such Peak Warrant immediately prior to the Effective Time multiplied by the Exchange Ratio, with any fractional Akari Ordinary Shares or Akari ADSs rounded down to the nearest whole Akari Ordinary Share or Akari ADS, as applicable, and the exercise price with respect to each Akari Ordinary Share (or each Akari Ordinary Share underlying Akari ADSs, as applicable) underlying such Adjusted Warrant will be equal to the exercise price of such Peak Warrant immediately prior to the Effective Time divided by the Exchange Ratio. The grant of the Adjusted Warrants will be effected as of the Effective Time, or as soon thereafter as is reasonably practicable, taking into account Parent’s administrative procedures. The Adjusted Warrants will be further adjusted, if applicable, to give effect to the impact of the Additional Exchange Ratio.

Each option to acquire shares of Peak Common Stock (“Peak Option”) that is outstanding and unexercised immediately prior to the Effective Time, whether or not vested, will be assumed and converted into an option to purchase a number of Akari ordinary shares or Akari ADSs, as determined by Akari (each, an “Adjusted Option”). The number of Akari Ordinary Shares (or the number of Akari Ordinary Shares underlying Akari ADSs, as applicable) subject to the Adjusted Option will be equal to the product of (i) the total number of shares of Peak Common Stock subject to such Peak Option immediately prior to the Effective Time multiplied by (ii) the Exchange Ratio, with any fractional Akari Ordinary Shares or Akari ADSs rounded down to the nearest whole Akari Ordinary Share or Akari ADS, as applicable, and the exercise price per share of each Adjusted Option will be equal to the exercise price of such Peak Option immediately prior to the Effective Time divided by the Exchange Ratio. The Adjusted Options will be further adjusted, if applicable, to give effect to the impact of the Additional Exchange Ratio.

Voting Agreements

Concurrently with the Merger Agreement, we and Akari entered into voting and support agreements (the “Voting Agreements”) with certain stockholders of Peak Bio (the “Peak Stockholders”) and certain shareholders of Akari (the “Akari Shareholders” and, together with the Peak Stockholders, the “Supporting Holders”). The Supporting Holders have agreed to, among other things, vote their shares in favor of the Merger Agreement and the Merger or the issuance of Akari Ordinary Shares in connection therewith, as applicable, in accordance with

the recommendation of the respective boards of directors of Peak Bio and Akari.

Bylaws Amendment

In connection with the execution of the Merger Agreement, on March 3, 2024, our Board approved an amendment to our Amended and Restated Bylaws (the “Bylaws Amendment”), which became effective immediately. The Bylaws Amendment requires that, unless we consent in writing to the selection of an alternative forum, the sole and exclusive forum for (i) any derivative action or proceeding brought on behalf of the Company, (ii) any action asserting a claim of breach of a fiduciary duty owed by any director, officer, employee or stockholder (including a beneficial owner) of the Company or the Company’s stockholders, (iii) any action asserting a claim against any director, officer, employee or stockholder (including a beneficial owner) of the Company arising under any provision of the Delaware General Corporation Law (“DGCL”) or the bylaws or the certificate of incorporation of the Company, or (iv) any action asserting a claim governed by the internal affairs doctrine shall, to the fullest extent permitted by law, be the Court of Chancery of the State of Delaware (or if the Court of Chancery for the State of Delaware does not have jurisdiction, a state court located within the State of Delaware or, if no state court located within the State of Delaware has subject matter jurisdiction, the federal district court for the District of Delaware). In addition, the Bylaws Amendment provides that unless the Company consents in writing to the selection of an alternative forum, the federal district courts of the United States shall be the exclusive forum for the resolution of any claim or cause of action arising under the Securities Act of 1933, as amended.

Going Concern

Since inception, the Company has incurred significant net losses. The Company incurred net losses of $12.3 million and $6.3 million for the nine months ended September 30, 2023 and 2022, respectively. The Company had not initially been capitalized with sufficient funding to conduct its operations. Since the Company had no available cash or credit facilities, the Company was dependent upon Peak Bio Co., Ltd. (formerly pH Pharma Ltd) and its affiliates to provide services and funding to support the operations of the Company through the closing of the Business Combination. The Company expects to incur significant expenses and operating losses for the foreseeable future as it continues its efforts to identify product candidates and seek regulatory approvals within its portfolio.

The Company will need additional capital to fund its planned Merger with Akari. The Company plans to raise this additional funding through the sale of equity, debt financings or other capital sources, as detailed in Note 14. The Company may be unable to raise additional funds or enter into such other arrangements when needed on favorable terms, or at all. There can be no assurances that other sources of financing would be available. Due to these uncertainties, there is substantial doubt about the Company’s ability to continue as a going concern.

The accompanying condensed consolidated financial statements have been prepared assuming that the Company will continue as a going concern. The condensed consolidated financial statements do not include any adjustments relating to the recoverability and classification of recorded asset amounts or classification of liabilities that might result from the outcome of the uncertainties discussed above.

The Company’s future operations are highly dependent on a combination of factors, including (i) the timely and successful completion of additional financing and the Akari Merger as discussed above; (ii) the success of its research and development programs; (iii) the development of competitive therapies by other biotechnology and pharmaceutical companies; (iv) the Company’s ability to manage growth of the organization; (v) the Company’s ability to protect its proprietary technology; and ultimately (vi) regulatory approval and market acceptance of the Company’s product candidates.