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Exhibit 15.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the registration statement No. 333-290863 on Form F-3 of our reports dated April 8, 2026, with respect to the consolidated financial statements of Inventiva S.A. and subsidiary and the effectiveness of internal control over financial reporting.

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Paris La Défense, France

April 8, 2026

KPMG S.A.

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/s/ Philippe Jacques Grandclerc

Partner

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