Description of Business	6 Months Ended
Apr. 30, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	1. Description of Business enGene Therapeutics Inc., formerly enGene Holdings Inc., together with its consolidated subsidiaries enGene Inc. and enGene USA, Inc. (“enGene” or the “Company”) is a clinical-stage biotechnology company focused on developing genetic medicines to improve the lives of patients, and its head office is located in Montreal, Quebec, Canada. The Company is developing non-viral genetic medicines based on its novel and proprietary dually derived chitosan, or “DDX”, gene delivery platform, which allows localized delivery of multiple gene cargos directly to mucosal tissues and other organs. We currently only have one product candidate, detalimogene, which is in a pivotal Phase 2 trial. The Company lists its Common Shares and Warrants on the Nasdaq Global Market under the symbols “ENGN” and “ENGNW,” respectively. Segment Information The Company considered the Company’s organizational structure and the information regularly reviewed and evaluated by the Company’s chief operating decision maker (“CODM”) when deciding how to allocate resources and assess performance. The Company has determined that its CODM is its Chief Executive Officer (“CEO”). The CODM reviews the financial information on a consolidated basis for purposes of evaluating financial performance and allocating resources. Based on this factor, the Company determined that it operates and manages its business as a single operating segment. As of April 30, 2026, the Company had $5.7 million and $3.7 million in long-lived assets held in the United States and in Canada, respectively. As of October 31, 2025, the Company had $7.2 million and $3.0 million in long-lived assets held in the United States and in Canada, respectively. Liquidity and Going Concern In accordance with Accounting Standards Codification (“ASC”) 205-40, Going Concern, the Company has evaluated whether there are any conditions and events, considered in the aggregate, that raise substantial doubt about the Company’s ability to continue as a going concern within one year after the date these consolidated financial statements are issued. As indicated in Note 16, Subsequent Events, the Company recently announced a plan to reduce its workforce by approximately 50% to streamline operations and preserve cash, in alignment with the Company’s strategic priorities. As of the issuance date of these consolidated financial statements, the Company expects that its existing cash, cash equivalents and marketable securities as of April 30, 2026 will be sufficient to fund its operating expenses and debt obligations requirements for at least the next 12 months. The Company’s interim condensed consolidated financial statements have been prepared assuming the Company will continue as a going concern, which presumes the Company will continue in operation for the foreseeable future and will be able to realize its assets and discharge its liabilities and commitments in the ordinary course of business. As an emerging growth entity, the Company has devoted substantially all of its resources since inception to organizing and staffing the Company, raising capital, establishing its intellectual property portfolio, acquiring or discovering product candidates, research and development activities for developing non-viral genetic medicines and other compounds, establishing arrangements with third parties for the manufacture of its product candidates and component materials, and providing general and administrative support for these operations. As a result, the Company has incurred significant operating losses and negative cash flows from operations since its inception and anticipates such losses and negative cash flows will continue for the foreseeable future. The Company has incurred a net loss of $60.0 million and negative cash flows from operating activities of $59.4 million for the six months ended April 30, 2026 and, as of that date, has an accumulated deficit of $432.0 million. The Company has not yet commercialized any product candidates and does not expect to generate revenue from sales of any product candidates or from other sources for several years, if at all. Even if the implementation of the workforce reduction and cash preservation strategy announced in June 2026 provides the anticipated cost savings as expected, the Company will need additional funding to support its continuing operations, service its outstanding debt and pursue its development strategy. To date, the Company has not generated any revenues and has financed its liquidity needs primarily through public and PIPE financings, offering debt, and issuance of warrants. The Company may seek additional funding through public or private equity offerings, debt financings, collaborations, strategic alliances or licensing arrangements with third parties or other means. There is no assurance that the Company will be successful in obtaining sufficient funding on acceptable terms, if at all, and it could be forced to delay, reduce or eliminate some or all of its research and development programs or commercialization efforts, which could materially adversely affect the Company’s business prospects or its ability to continue operations.

Description of Business

6 Months Ended

Apr. 30, 2026

Organization, Consolidation and Presentation of Financial Statements [Abstract]

enGene Therapeutics Inc., formerly enGene Holdings Inc., together with its consolidated subsidiaries enGene Inc. and enGene USA, Inc. (“enGene” or the “Company”) is a clinical-stage biotechnology company focused on developing genetic medicines to improve the lives of patients, and its head office is located in Montreal, Quebec, Canada. The Company is developing non-viral genetic medicines based on its novel and proprietary dually derived chitosan, or “DDX”, gene delivery platform, which allows localized delivery of multiple gene cargos directly to mucosal tissues and other organs. We currently only have one product candidate, detalimogene, which is in a pivotal Phase 2 trial.

The Company lists its Common Shares and Warrants on the Nasdaq Global Market under the symbols “ENGN” and “ENGNW,” respectively.

Segment Information

The Company considered the Company’s organizational structure and the information regularly reviewed and evaluated by the Company’s chief operating decision maker (“CODM”) when deciding how to allocate resources and assess performance. The Company has determined that its CODM is its Chief Executive Officer (“CEO”). The CODM reviews the financial information on a consolidated basis for purposes of evaluating financial performance and allocating resources. Based on this factor, the Company determined that it operates and manages its business as a single operating segment. As of April 30, 2026, the Company had $5.7 million and $3.7 million in long-lived assets held in the United States and in Canada, respectively. As of October 31, 2025, the Company had $7.2 million and $3.0 million in long-lived assets held in the United States and in Canada, respectively.

Liquidity and Going Concern

In accordance with Accounting Standards Codification (“ASC”) 205-40, Going Concern, the Company has evaluated whether there are any conditions and events, considered in the aggregate, that raise substantial doubt about the Company’s ability to continue as a going concern within one year after the date these consolidated financial statements are issued. As indicated in Note 16, Subsequent Events, the Company recently announced a plan to reduce its workforce by approximately 50% to streamline operations and preserve cash, in alignment with the Company’s strategic priorities. As of the issuance date of these consolidated financial statements, the Company expects that its existing cash, cash equivalents and marketable securities as of April 30, 2026 will be sufficient to fund its operating expenses and debt obligations requirements for at least the next 12 months.

The Company’s interim condensed consolidated financial statements have been prepared assuming the Company will continue as a going concern, which presumes the Company will continue in operation for the foreseeable future and will be able to realize its assets and discharge its liabilities and commitments in the ordinary course of business.

As an emerging growth entity, the Company has devoted substantially all of its resources since inception to organizing and staffing the Company, raising capital, establishing its intellectual property portfolio, acquiring or discovering product candidates, research and development activities for developing non-viral genetic medicines and other compounds, establishing arrangements with third parties for the manufacture of its product candidates and component materials, and providing general and administrative support for these operations. As a result, the Company has incurred significant operating losses and negative cash flows from operations since its inception and anticipates such losses and negative cash flows will continue for the foreseeable future.

The Company has incurred a net loss of $60.0 million and negative cash flows from operating activities of $59.4 million for the six months ended April 30, 2026 and, as of that date, has an accumulated deficit of $432.0 million. The Company has not yet commercialized any product candidates and does not expect to generate revenue from sales of any product candidates or from other sources for several years, if at all.

Even if the implementation of the workforce reduction and cash preservation strategy announced in June 2026 provides the anticipated cost savings as expected, the Company will need additional funding to support its continuing operations, service its outstanding debt and pursue its development strategy. To date, the Company has not generated any revenues and has financed its liquidity needs primarily through public and PIPE financings, offering debt, and issuance of warrants. The Company may seek additional funding through public or private equity offerings, debt financings, collaborations, strategic alliances or licensing arrangements with third parties or other means. There is no assurance that the Company will be successful in obtaining sufficient funding on acceptable terms, if at all, and it could be forced to delay, reduce or eliminate some or all of its research and development

programs or commercialization efforts, which could materially adversely affect the Company’s business prospects or its ability to continue operations.