Bertozzi Carolyn R 4

What Happened
Carolyn R. Bertozzi, a director of OmniAb, reported multiple derivative transactions on 2026-06-17: two exercise/conversion entries (one acquiring 20,000 derivative shares and one disposing of 20,000 derivative shares) and two award/grant entries acquiring 20,000 and 40,000 derivative-linked units. The filings show $0 cash exchanged for these transactions. Taken together the filing shows 80,000 derivative/RSU-type units acquired and a separate 20,000-share derivative disposal (net +60,000 derivative-linked units).

Key Details

• Transaction date: 2026-06-17; Form 4 filed 2026-06-18 (timely).
• Reported transactions:
  • Exercise/conversion (Code M): 20,000 shares acquired (price N/A).
  • Exercise/conversion (Code M): 20,000 shares disposed at $0 (derivative).
  • Grant/award (Code A): 20,000 shares acquired at $0 (derivative).
  • Grant/award (Code A): 40,000 shares acquired at $0 (derivative).
• Net change per filing: +60,000 derivative-linked units (80,000 acquired less 20,000 disposed).
• Shares owned after the transactions: not specified in the materials provided.
• Footnotes of note:
  • F1/F3: RSUs vest on the earlier of the next annual stockholders’ meeting after grant or one year after grant.
  • F2: Each RSU equals a contingent right to one share of common stock.
  • F4: Stock options vest in full on the earlier of the next annual meeting or one year after grant.
• No indication in the filing of a 10b5-1 plan or tax-withholding sale; the reason for the 20,000-share derivative disposal at $0 is not explained in the filing.

Context

• These entries appear to be awards/vestings and an exercise/conversion of derivatives rather than open-market purchases or sales by the director. Awards/vestings typically reflect compensation or plan-based conversions and do not necessarily signal a personal buy/sell decision.
• The filing shows $0 exchanged for these items; that often occurs for vesting of RSUs or internal conversions but the Form 4 does not specify whether any shares were immediately sold or withheld for taxes.
• For retail investors, purchases are generally a stronger signal of insider confidence than routine awards/vestings; this filing documents compensation-related activity and conversions rather than an outright market purchase.