Enliven Therapeutics, Inc. New Standards Disclosure

Recently adopted accounting pronouncements

In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which is intended to improve reportable segment disclosure requirements. ASU 2023-07 expands public entities’ segment disclosures by requiring disclosure of significant segment expenses that are regularly provided to the CODM and included within each reported measure of segment profit or loss, an amount and description of its composition for other segment items, and interim disclosures of a reportable segment’s profit or loss and assets. The amendments are effective for fiscal years beginning after December 15, 2023, and for interim periods within fiscal years beginning after December 15, 2024. The amendments should be applied retrospectively to all prior periods presented in the financial statements. The Company adopted ASU 2023-07 on December 31, 2024 and the interim requirements in the quarter ending March 31, 2025, as required, resulting in additional segment disclosures, including discussion of relevant financial data used by the CODM to assess segment performance and make decisions about resource allocation. See Note 2—Segments and Note 13—Segment Information.

In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. ASU 2023-09 improves the transparency and decision usefulness of income tax disclosures by requiring consistent categorization and greater disaggregation of information in the effective tax rate reconciliation and income taxes paid, disaggregated by jurisdiction. It also includes certain other amendments to improve the effectiveness of income tax disclosures. This guidance is effective for annual periods beginning after December 15, 2024. The Company adopted ASU 2023-09 on December 31, 2025, as required, resulting in presentational changes to its income tax disclosures. See Note 11—Income Taxes, which includes retrospectively updated income tax disclosure presentations required by ASU 2023-09.

Accounting pronouncements not yet adopted

In October 2023, the FASB issued ASU 2023-06, Disclosure Improvements: Codification Amendments in Response to the SEC’s Disclosure Updated and Simplification Initiative, which amends the disclosure or presentation requirements related to various subtopics in the FASB ASC. ASU 2023-06 was issued in response to the SEC’s August 2018 final rule that updated and simplified disclosure requirements and is intended to align U.S. GAAP requirements with those of the SEC and to facilitate the application of U.S. GAAP for all entities. For entities subject to the SEC’s existing disclosure requirements and for entities required to file or furnish financial statements with or to the SEC in preparation for the sale of or for purposes of issuing securities that are not subject to contractual restrictions on transfer, the effective date for each amendment will be the date on which the SEC removes that related disclosure from its rules. However, if by June 30, 2027, the SEC has not removed the related disclosure from its regulations, the amendments will be removed from the Codification and not become effective for any entity. The Company is currently evaluating the impact of this guidance, but does not expect the adoption of this guidance to have a material impact on its consolidated financial statements and disclosures.

In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses, which requires public business entities to provide more detailed information in the notes to the financial statements about specified categories of expenses (purchases of inventory,

employee compensation, depreciation and amortization) included in certain expense captions presented on the consolidated statement of operations and comprehensive loss. The guidance is effective for annual periods beginning after December 15, 2026, and for interim periods within fiscal years beginning after December 15, 2027. Early adoption is permitted. The amendments may be applied either (1) prospectively to financial statements issued for periods after the effective date of this ASU or (2) retrospectively to all prior periods presented in the consolidated financial statements. The Company is currently evaluating the impact that this guidance will have on its consolidated financial statements and disclosures.

In September 2025, the FASB issued ASU 2025-07, Derivatives and Hedging (Topic 815) and Revenue from Contracts with Customers (Topic 606): Derivatives Scope Refinements and Scope Clarification for Share-Based Noncash Consideration from a Customer in a Revenue Contract. ASU 2025-07 (i) expands a scope exception in Topic 815 to exclude from derivative accounting certain non-exchange-traded contracts whose underlyings are based on operations or activities specific to one of the parties to the contract, while excluding variables based on market rates/prices/indices, the price or performance of a party’s financial assets or liabilities, contracts in an issuer’s own equity subject to Subtopic 815-40, and call/put options on debt; and (ii) clarifies that Topic 606 applies to share-based noncash consideration from a customer for the transfer of goods or services until the entity’s right to receive or retain that consideration is unconditional under Topic 606, after which other Topics (e.g., 815 or 321) apply. The amendments are effective for annual periods beginning after December 15, 2026, including interim periods within those annual reporting periods. Early adoption is permitted. For the derivative scope refinements (Topic 815), entities may adopt prospectively to new contracts entered into on/after the adoption date or on a modified retrospective basis with a cumulative-effect adjustment. For the scope clarification for share-based noncash consideration from a customer in a revenue contract (Topic 606), entities may adopt prospectively or on a modified retrospective basis with a cumulative-effect adjustment. The Company is currently evaluating the impact that this guidance will have on its consolidated financial statements and disclosures.