PICKER DONALD H 4

What Happened Donald H. Picker, Chief Science Officer of Moleculin Biotech (MBRX), had restricted stock units (RSUs) convert into common stock in two vesting events: 44 shares vested on 2026-06-20 and 71 shares vested on 2026-06-22, for a total of 115 shares acquired. To cover tax liabilities, the company withheld 13 shares on 6/20 (valued at $2.88 per share, ~$37) and 21 shares on 6/22 (valued at $3.12 per share, ~$66), resulting in 34 shares withheld and a net increase of 81 shares to Picker’s holdings. The conversions were reported on a Form 4 filed 2026-06-24.

Key Details

• Transaction dates: 2026-06-20 (44 RSUs vest; 13 shares withheld), 2026-06-22 (71 RSUs vest; 21 shares withheld).
• Withholding values: 13 shares × $2.88 = $37; 21 shares × $3.12 = $66; total withheld ≈ $103.
• Shares acquired (gross): 115; shares withheld for taxes: 34; net new shares: 81.
• Footnotes: F1–F4 indicate RSUs convert 1:1, shares were withheld to pay taxes, and the RSUs came from grants on 6/20/2022 (173 RSUs) and 6/22/2023 (283 RSUs) that vest in four equal annual installments. The vested amounts here represent one installment from each grant.
• Shares owned after the transactions were not provided in the data shown.
• Filing: Form 4 filed 2026-06-24 reporting the 6/20 and 6/22 events; no explicit late-filing flag was provided in the supplied data.

Context These were RSU vesting events with shares withheld to satisfy tax obligations (code F), not open-market sales or purchases. This is a routine equity compensation settlement rather than a directional insider buy or sell; the withholding is effectively a cashless tax payment and results in a net increase of shares held by the insider.