Power of Attorney for Peter B. Silverman

This filing details a Power of Attorney granted by Peter B. Silverman to Mark Worthington and other representatives of Wilson Sonsini Goodrich & Rosati. The attorneys-in-fact are authorized to execute and file various SEC forms, including Forms 3, 4, 5, 13D, 13G, and 144, on behalf of Mr. Silverman in his capacity as a director of LeonaBio, Inc. They are also empowered to manage Mr. Silverman's EDGAR account and perform any necessary actions related to these filings. The Power of Attorney remains in effect until specific conditions, such as Mr. Silverman no longer being required to file these forms or the revocation of the power, are met. This document was executed on April 28, 2026.