GUSTAFSON KURT A 4

4 · OmniAb, Inc. · Filed Feb 17, 2026

AI-generated summary of this filing

Updated Feb 17, 2026

OmniAb (OABI) CFO Kurt A. Gustafson Sells Shares to Cover Taxes

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.

Form 4

Period: 2026-02-16

Executive VP, Finance and CFO

Transactions

Exercise/Conversion
Common Stock
[F1][F2]
2026-02-16+13,542→ 266,230 total
Sale
Common Stock
[F3][F4]
2026-02-17$1.70/sh−6,828$11,608→ 259,402 total
Exercise/Conversion
Restricted Stock Units
[F2][F1]
2026-02-16−13,542→ 83,334 total
Exercise: $0.00→ Common Stock (13,542 underlying)

Footnotes (4)

[F1]Represents the vesting of an RSU grant which occurs in three substantially equal annual installments beginning on February 16, 2025.
[F2]Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.
[F3]Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. These sales are mandated by the Issuer's election under its equity incentive plans to require the satisfaction of a tax withholding obligation to be funded by a "sell-to-cover" transaction and do not represent discretionary trades by the reporting person.
[F4]The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.68 to $1.79. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Signature

By: /s/ Charles S. Berkman, Attorney-in-Fact For: Kurt A. Gustafson|2026-02-17

1 file