Kosacz Barbara 4

What Happened
Barbara Kosacz, a director of LeonaBio, was granted a derivative award on April 9, 2026, covering 28,000 shares. The Form 4 reports the acquisition as a grant (transaction code A) with a reported price of $0.00; the filing classifies the award as a derivative security rather than an immediate share purchase.

Key Details

• Transaction date: 2026-04-09; Form 4 filed: 2026-04-13 (timely — within required two business days).
• Security: Derivative award for 28,000 shares; reported price $0.00 on the Form 4.
• Shares owned after transaction: Not specified in this filing.
• Footnote: The optioned shares vest monthly over 24 months on the monthly anniversaries of the grant date, contingent on continuing service under the Issuer's 2026 Equity Incentive Plan.
• Transaction code: A = Award/Grant (not a purchase or sale).

Context
This was a grant of a derivative compensation award (an option subject to vesting), not an immediate cash purchase or sale of stock. Such awards are commonly part of director or executive compensation and do not by themselves indicate a buy or sell signal until options vest or are exercised.