GUSTAFSON KURT A 4

What Happened

• Kurt A. Gustafson, Executive Vice President, Finance and Chief Financial Officer of OmniAb (OABI), had 13,542 Restricted Stock Units (RSUs) vest on 2026-02-16, resulting in the issuance/conversion of 13,542 shares (reported as exercise/conversion of a derivative, code M).
• To cover tax withholding required on the vesting, 6,828 of those shares were sold in an open-market "sell-to-cover" transaction on 2026-02-17 at a weighted average price of $1.70, generating proceeds of $11,608. After the sell-to-cover, Gustafson retained a net 6,714 shares from this vesting event.

Key Details

• Transaction dates: RSU vest/conversion 2026-02-16; sell-to-cover sale(s) 2026-02-17.
• Shares: 13,542 RSUs vested → 13,542 shares acquired; 6,828 shares sold; net retained from vesting = 6,714 shares.
• Sale price: weighted avg $1.70 (range reported $1.68–$1.79 per filing footnote).
• Reported value of sale: $11,608.
• Footnotes: F1–F3 confirm these were RSUs (one RSU = one share), vesting per grant schedule, and the sale was mandated by the issuer’s sell-to-cover tax withholding election (not a discretionary sale). F4 notes the weighted-average price and availability of per-trade pricing details upon request.
• Filing: Form 4 filed 2026-02-17 reporting transactions on 2026-02-16/17; no late filing indicated.

Context

• RSU vesting converts contingent units into shares (derivative code M indicates conversion/exercise). The sale here was a routine sell-to-cover to satisfy tax withholding obligations and should not be interpreted as a discretionary insider sale expressing a view on the company’s prospects.
• Sales to cover taxes are common and generally less informative than voluntary open-market purchases, which are stronger signals of insider conviction.