• LeonaBio 10% owner David J. Portman reported acquiring 3,149,470 common shares, bringing his indirect holdings to 3,149,470 shares.
• Portman also reported disposing of 5,502,402 warrants, leaving no warrants beneficially owned.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. LeonaBio Inc. published the original content used to generate this news brief via EDGAR, the Electronic Data Gathering, Analysis, and Retrieval system operated by the U.S. Securities and Exchange Commission (Ref. ID: 0002126186-26-000002), on October 28, 2026, and is solely responsible for the information contained therein.