SCHEDULE 13G/A 0001884931 XXXXXXXX LIVE 2 Common Stock, $0.0001 par value per share 09/30/2025 0001846253 OmniAb, Inc. 68218J103 5980 HORTON STREET SUITE 600 EMERYVILLE CA 94608 Rule 13d-1(c) Whitefort Capital Management, LP DE 0 14223658 0 14223658 14223658 N 9.9 IA PN David Salanic I0 0 14223658 0 14223658 14223658 N 9.9 IN HC Joseph Kaplan X1 0 14223658 0 14223658 14223658 N 9.9 IN HC OmniAb, Inc. 5980 HORTON STREET, SUITE 600, EMERYVILLE, California, 94608 The names of the persons filing this statement on Schedule 13G are (collectively, the "Reporting Persons"): -Whitefort Capital Management, LP, a Delaware limited partnership ("Whitefort Management"); -David Salanic, a French citizen ("Mr. Salanic"); and -Joseph Kaplan, a United States citizen ("Mr. Kaplan"). Whitefort Management acts as the investment manager of certain client accounts. Each of Mr. Salanic and Mr. Kaplan is a Co-Managing Partner of Whitefort Management. By virtue of these relationships, each of Whitefort Management, Mr. Salanic and Mr. Kaplan may be deemed to have voting and dispositive power with respect to shares of Common Stock (as defined below) held in client accounts managed by Whitefort Management. The principal business address of each of the Reporting Persons is 12 East 49th Street, 40th Floor, New York, New York 10017. Mr. Salanic is a citizen of France. Mr. Kaplan is a citizen of the United States. Whitefort Management is a limited partnership formed under the laws of the State of Delaware. Y As of the close of business on September 30, 2025, (i) Whitefort Management, as the investment manager of certain client accounts, may be deemed to beneficially own the 14,223,658 Shares held in such accounts; (ii) Mr. Salanic, as a Co-Managing Partner of Whitefort Management, may be deemed to beneficially own the 14,223,658 Shares held in the client accounts managed by Whitefort Management. (iii) Mr. Kaplan, as a Co-Managing Partner of Whitefort Management, may be deemed to beneficially own the 14,223,658 Shares held in the client accounts managed by Whitefort Management. The percentage of Shares reported owned by each person named herein is based upon 143,955,400 Shares outstanding as of October 28, 2025, as reported on the Issuer's Form 10-Q filed with the Securities and Exchange Commission on November 4, 2025. As of the close of business on September 30, 2025, each of the Reporting Persons may be deemed to beneficially own 9.9% of the outstanding Shares. See Cover Pages Items 5-8. See Cover Pages Items 5-8. See Cover Pages Items 5-8. See Cover Pages Items 5-8. Y Y Y N See Exhibit A on the Schedule 13G filed by the Reporting Persons with the Securities and Exchange Commission on June 6, 2025. Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. Whitefort Capital Management, LP /s/ David Salanic 11/14/2025 /s/ Joseph Kaplan 11/14/2025 David Salanic /s/ David Salanic 11/14/2025 Joseph Kaplan /s/ Joseph Kaplan 11/14/2025