Nature of Operations and Basis of Presentation	3 Months Ended
Mar. 31, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Nature of Operations and Basis of Presentation	1. NATURE OF OPERATIONS AND BASIS OF PRESENTATION Business Finch Therapeutics Group, Inc. (the “Company” or “FTG”) was incorporated in 2017 as a Delaware corporation. The Company was formed as a result of a merger and recapitalization of Finch Therapeutics, Inc. (“Finch”) and Crestovo Holdings LLC (“Crestovo”) in September 2017 (the “Merger”), where the former owners of Finch and Crestovo were issued equivalent stakes in the newly formed company, FTG. Crestovo was renamed Finch Therapeutics Holdings LLC in November 2020 (“Finch Holdings”). Finch and Finch Holdings are both wholly-owned subsidiaries of FTG. The Company is a clinical-stage microbiome therapeutics company leveraging its Human-First Discovery® platform to develop a novel class of orally administered biological drugs. It is developing novel therapeutics designed to deliver missing microbes and their clinically relevant biochemical functions to correct dysbiosis and the diseases that emerge from it. The Company’s Human-First Discovery platform uses reverse translation to identify diseases of dysbiosis and to design microbiome therapeutics that address them. Its lead product candidate, CP101, delivers a complete microbiome and is being developed initially for the treatment of patients with recurrent Clostridioides difficile infection, or CDI. Initial Public Offering On March 18, 2021, the Company completed its initial public offering (“IPO”) in which the Company issued and sold 7,500,000 shares of its common stock at a public offering price of $17.00 per share, for aggregate gross proceeds of $127.5 million. The net proceeds from the IPO were $115.7 million after deducting underwriting discounts and commissions of $8.9 million and offering costs of $2.9 million. In connection with the IPO, the Company’s board of directors (the “Board”) and stockholders approved an amended and restated certificate of incorporation to, among other things, effect a one-for-14.444 reverse stock split of the Company’s issued and outstanding shares of common stock and redeemable convertible preferred stock, as well as to effect a proportional adjustment to the existing conversion ratios for the Company’s redeemable convertible preferred stock. The reverse stock split was effected on March 12, 2021. Accordingly, all share and per share amounts of common stock for all periods presented in the accompanying unaudited interim condensed consolidated financial statements and notes thereto have been retroactively adjusted, where applicable, to reflect this reverse stock split and adjustment of preferred stock conversion ratios. Upon the closing of the IPO, all of the then-outstanding shares of redeemable convertible preferred stock automatically converted into 31,253,609 shares of common stock at the applicable conversion ratio then in effect. Subsequent to the closing of the IPO, there were no shares of convertible preferred stock outstanding. COVID-19 Impact The extent of the impact of the COVID-19 pandemic on the Company’s business, operations and clinical development timelines and plans remains uncertain, and will depend on certain developments, including the duration and spread of the outbreak and its impact on clinical trial enrollment, trial sites, contract research organizations, contract manufacturing organizations, and other third parties with whom the Company does business, as well as its impact on regulatory authorities and its key scientific and management personnel. While the Company is experiencing limited financial impacts at this time, given the global economic slowdown, the overall disruption of global healthcare systems and the other risks and uncertainties associated with the pandemic, the Company’s business, financial condition and results of operations ultimately could be materially adversely affected. The Company continues to closely monitor the COVID-19 pandemic as it evolves its business continuity plans, clinical development plans and response strategy. At this time, it is unknown how long the adverse conditions associated with the COVID-19 pandemic will last and what the complete financial effect will be to the Company. Liquidity and Capital Resources Management believes that the Company’s existing cash and cash equivalents, together with the net proceeds from the IPO, will allow the Company to continue its operations for at least the next 12 months from the date these financial statements are issued and therefore the conditions raising substantial doubt raised in prior periods has been alleviated. In the absence of a significant source of recurring revenue, the continued viability of the Company beyond that point is dependent on its ability to continue to raise additional capital to finance its operations. If the Company is unable to obtain additional funding, the Company may be forced to delay, reduce or eliminate some or all of its research and development programs, product portfolio expansion or commercialization efforts, which could adversely affect its business prospects, or the Company may be unable to continue operations. Basis of Presentation The accompanying unaudited interim condensed consolidated financial statements have been prepared by the Company in conformity with generally accepted accounting principles in the United States of America (“U.S. GAAP”) and, pursuant to the rules and regulations of Article 10 of Regulation S-X of the Securities Act published by the Securities and Exchange Commission (“SEC”) for interim financial statements. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. However, the Company believes the disclosures are adequate. These unaudited interim condensed consolidated financial statements should be read in conjunction with the Company’s audited financial statements and notes thereto for the year ended December 31, 2020 included in the Company’s final prospectus dated March 18, 2021, filed with the SEC on March 22, 2021 pursuant to Rule 424(b) under the Securities Act of 1933, as amended (the “Prospectus”). The unaudited interim condensed consolidated financial statements have been prepared on the same basis as the audited financial statements. In the opinion of management, the accompanying unaudited interim condensed consolidated financial statements contain all adjustments which are necessary for a fair presentation of the Company’s condensed consolidated balance sheets as of March 31, 2021 and December 31, 2020, condensed consolidated statements of operations for the three months ended March 31, 2021 and 2020, condensed consolidated statements of stockholders’ equity (deficit) for the three months ended March 31, 2021 and 2020, and condensed consolidated cash flows for the three months ended March 31, 2021 and 2020. Such adjustments are of a normal and recurring nature. The results of operations for the three months ended March 31, 2021 are not necessarily indicative of the results of operations that may be expected for the year ending December 31, 2021.

Nature of Operations and Basis of Presentation

3 Months Ended

Mar. 31, 2021

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Nature of Operations and Basis of Presentation

1. NATURE OF OPERATIONS AND BASIS OF PRESENTATION

Business

Finch Therapeutics Group, Inc. (the “Company” or “FTG”) was incorporated in 2017 as a Delaware corporation. The Company was formed as a result of a merger and recapitalization of Finch Therapeutics, Inc. (“Finch”) and Crestovo Holdings LLC (“Crestovo”) in September 2017 (the “Merger”), where the former owners of Finch and Crestovo were issued equivalent stakes in the newly formed company, FTG. Crestovo was renamed Finch Therapeutics Holdings LLC in November 2020 (“Finch Holdings”). Finch and Finch Holdings are both wholly-owned subsidiaries of FTG.

The Company is a clinical-stage microbiome therapeutics company leveraging its Human-First Discovery® platform to develop a novel class of orally administered biological drugs. It is developing novel therapeutics designed to deliver missing microbes and their clinically relevant biochemical functions to correct dysbiosis and the diseases that emerge from it. The Company’s Human-First Discovery platform uses reverse translation to identify diseases of dysbiosis and to design microbiome therapeutics that address them. Its lead product candidate, CP101, delivers a complete microbiome and is being developed initially for the treatment of patients with recurrent Clostridioides difficile infection, or CDI.

Initial Public Offering

On March 18, 2021, the Company completed its initial public offering (“IPO”) in which the Company issued and sold 7,500,000 shares of its common stock at a public offering price of $17.00 per share, for aggregate gross proceeds of $127.5 million. The net proceeds from the IPO were $115.7 million after deducting underwriting discounts and commissions of $8.9 million and offering costs of $2.9 million.

In connection with the IPO, the Company’s board of directors (the “Board”) and stockholders approved an amended and restated certificate of incorporation to, among other things, effect a one-for-14.444 reverse stock split of the Company’s issued and outstanding shares of common stock and redeemable convertible preferred stock, as well as to effect a proportional adjustment to the existing conversion ratios for the Company’s redeemable convertible preferred stock. The reverse stock split was effected on March 12, 2021. Accordingly, all share and per share amounts of common stock for all periods presented in the accompanying unaudited interim condensed consolidated financial statements and notes thereto have been retroactively adjusted, where applicable, to reflect this reverse stock split and adjustment of preferred stock conversion ratios. Upon the closing of the IPO, all of the then-outstanding shares of redeemable convertible preferred stock automatically converted into 31,253,609 shares of common stock at the applicable conversion ratio then in effect. Subsequent to the closing of the IPO, there were no shares of convertible preferred stock outstanding.

COVID-19 Impact

The extent of the impact of the COVID-19 pandemic on the Company’s business, operations and clinical development timelines and plans remains uncertain, and will depend on certain developments, including the duration and spread of the outbreak and its impact on clinical trial enrollment, trial sites, contract research organizations, contract manufacturing organizations, and other third parties with whom the Company does business, as well as its impact on regulatory authorities and its key scientific and management personnel. While the Company is experiencing limited financial impacts at this time, given the global economic slowdown, the overall disruption of global healthcare systems and the other risks and uncertainties associated with the pandemic, the Company’s business, financial condition and results of operations ultimately could be materially adversely affected. The Company continues to closely monitor the COVID-19 pandemic as it evolves its business continuity plans, clinical development plans and response strategy.

At this time, it is unknown how long the adverse conditions associated with the COVID-19 pandemic will last and what the complete financial effect will be to the Company.

Liquidity and Capital Resources

Management believes that the Company’s existing cash and cash equivalents, together with the net proceeds from the IPO, will allow the Company to continue its operations for at least the next 12 months from the date these financial statements are issued and therefore the conditions raising substantial doubt raised in prior periods has been alleviated. In the absence of a significant source of recurring revenue, the continued viability of the Company beyond that point is dependent on its ability to continue to raise additional capital to finance its operations. If the Company is unable to obtain additional funding, the Company may be forced to delay, reduce or

eliminate some or all of its research and development programs, product portfolio expansion or commercialization efforts, which could adversely affect its business prospects, or the Company may be unable to continue operations.

Basis of Presentation

The accompanying unaudited interim condensed consolidated financial statements have been prepared by the Company in conformity with generally accepted accounting principles in the United States of America (“U.S. GAAP”) and, pursuant to the rules and regulations of Article 10 of Regulation S-X of the Securities Act published by the Securities and Exchange Commission (“SEC”) for interim financial statements. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. However, the Company believes the disclosures are adequate. These unaudited interim condensed consolidated financial statements should be read in conjunction with the Company’s audited financial statements and notes thereto for the year ended December 31, 2020 included in the Company’s final prospectus dated March 18, 2021, filed with the SEC on March 22, 2021 pursuant to Rule 424(b) under the Securities Act of 1933, as amended (the “Prospectus”).

The unaudited interim condensed consolidated financial statements have been prepared on the same basis as the audited financial statements. In the opinion of management, the accompanying unaudited interim condensed consolidated financial statements contain all adjustments which are necessary for a fair presentation of the Company’s condensed consolidated balance sheets as of March 31, 2021 and December 31, 2020, condensed consolidated statements of operations for the three months ended March 31, 2021 and 2020, condensed consolidated statements of stockholders’ equity (deficit) for the three months ended March 31, 2021 and 2020, and condensed consolidated cash flows for the three months ended March 31, 2021 and 2020. Such adjustments are of a normal and recurring nature. The results of operations for the three months ended March 31, 2021 are not necessarily indicative of the results of operations that may be expected for the year ending December 31, 2021.