Crouse Steven C. 4

What Happened

• Steven C. Crouse, a director of OmniAb, had Restricted Stock Units (RSUs) vest on April 21, 2026. The filing shows the conversion/acquisition of 13,333 shares (derivative transaction code M) and a simultaneous disposal of 13,333 shares at $0.00. The acquisition reflects vested RSUs converting into common stock; the $0.00 disposal is shown as a derivative disposition.

Key Details

• Transaction date: 2026-04-21 (filed same day).
• Acquired: 13,333 shares via conversion of RSUs (derivative, code M); Price: N/A.
• Disposed: 13,333 shares (derivative, code M) at $0.00; Reported proceeds: $0.
• Shares owned after transaction: Not specified in the filing.
• Footnotes: F1 — RSU vests in three substantially equal annual installments beginning April 21, 2026, subject to continued service. F2 — Each RSU equals a contingent right to one share of common stock.
• Filing timeliness: Filed on the same date as the reported transactions (not marked late).

Context

• This filing documents RSU vesting and conversion to shares rather than an open-market purchase or sale. Dispositions recorded at $0.00 commonly reflect shares withheld or net-settled to satisfy tax withholding or similar obligations upon vesting; the filing’s footnotes confirm these were RSUs vesting in installments. This is routine compensation-related activity and not necessarily an indication of director market sentiment.