Business Description

1. Organization and Description of the Business Business and Organization Evommune, Inc. and its subsidiaries (“Evommune” or the “Company”) is a Delaware corporation headquartered in Palo Alto, California. Evommune is a clinical stage biotechnology company developing innovative therapies that target key drivers of chronic inflammatory diseases. Liquidity The Company has incurred significant operating losses since inception and has relied primarily on equity financing and license revenue to fund its operations. As of December 31, 2025, the Company had an accumulated deficit of $ 221.1 million . The Company expects to continue to incur substantial losses, and its ability to achieve and sustain profitability will depend on the successful development, approval, and commercialization of product candidates and on the achievement of sufficient revenue to support its cost structure. The Company may never achieve profitability and, unless and until it does, the Company will need to continue to raise additional capital. As previously disclosed in the Company’s consolidated financial statements for the year ended December 31, 2024, management identified conditions that raised substantial doubt about the Company’s ability to continue as a going concern. During the year ended December 31, 2025 , management implemented plans that alleviated the substantial doubt. The principal factor leading to this conclusion is additional capital raised through the issuance of preferred stock (Note 7), and the issuance of common stock in the Company’s initial public offering (“IPO”) in November 2025 (Note 7), through which the Company raised gross proceeds of $ 237.8 million. As of December 31, 2025, management expects that existing cash, cash equivalents and short-term investments will be sufficient to fund the Company’s current operating plan for at least twelve months from the issuance date of these financial statements. Significant Risks and Uncertainties The Company operates in a dynamic and highly competitive industry and believes that changes in any of the following areas could have a material adverse effect on the Company’s future financial position, results of operations, or cash flows: its ability to obtain future financing; its ability to continue research and development of its product candidates; payment obligations under license or collaboration agreements; advances and trends in new technologies and industry standards; results of clinical trials; regulatory approval and market acceptance of the Company’s product candidates; development of sales, marketing and distribution infrastructure; competing therapies and marketing development; investment in or in-license other technologies; certain strategic relationships; competition from pharmaceutical or other biotechnology companies with greater financial resources or expertise; litigation or claims against its intellectual property portfolio, patent, product, regulatory, or other factors; operational, financial and management systems; and the Company’s ability to attract and retain employees necessary to support its growth. Product candidates being developed by the Company require approvals from the U.S. Food and Drug Administration (“FDA”) or other international regulatory agencies prior to commercial sales. There can be no assurance that any product candidates will receive the necessary approvals. If the Company is denied approval, approval is delayed or the Company is unable to maintain approval, it could have a material adverse impact on the Company. The Company has expended and expects to continue to expend substantial funds to complete the research, development and pre-clinical and clinical testing of product candidates. The Company also will be required to expend additional funds to establish commercial-scale manufacturing arrangements and to provide for the marketing and distribution of product candidates that may receive regulatory approval. If adequate funds are unavailable from operations or additional sources of financing, the Company may have to delay, reduce the scope of or eliminate one or more of its research or development programs which would materially and adversely affect its business, financial condition and results of operations.…