Schedule 13G/A: Whitefort Reports 10.24M OmniAb Shares, 8.4% Ownership

Rhea-AI Filing Summary

Whitefort Capital Management and two co-managing partners report beneficial ownership of 10,240,146 shares of OmniAb, Inc. (OABI), representing 8.4% of the outstanding common stock as of June 30, 2025. The filing states Whitefort Management acts as investment manager for client accounts holding these shares, and Co-Managing Partners David Salanic and Joseph Kaplan may be deemed to beneficially own the same block due to their roles. The 8.4% figure is based on 122,335,336 shares outstanding as of May 1, 2025. The statement affirms the position is not held to change or influence control of the issuer.

Positive

• Material ownership disclosed: Whitefort Capital Management and named partners report a clear beneficial holding of 10,240,146 shares, providing transparency to the market.
• Position characterized as passive: The filers certify the shares are not held to influence or change control, consistent with Schedule 13G treatment.

Negative

• Single large holder concentration: An 8.4% stake by one manager may concentrate voting power in a block held across client accounts.
• Limited detail on underlying accounts: Filing does not specify the client accounts or whether any portion is excluded, limiting granularity for investors.

Insights

Securities Analyst

TL;DR: A single investment manager and its partners report an 8.4% stake in OmniAb, a sizable passive holding below 10%.

This Schedule 13G/A discloses that Whitefort Capital Management, LP and two named partners collectively may be deemed to beneficially own 10,240,146 shares (8.4%) of OmniAb common stock. The filing characterizes the position as not intended to influence control, consistent with a passive investor filing under Rule 13d-1(b)/(c). For investors, an 8.4% stake signals meaningful ownership that could attract attention without crossing thresholds that typically trigger activist presumptions.

Corporate Governance Expert

TL;DR: Ownership disclosure is material for governance monitoring but shows no expressed intent to seek control.

The filing identifies Whitefort Management as investment manager and names Co-Managing Partners David Salanic and Joseph Kaplan as parties who may be deemed beneficial owners. The document explicitly states the securities were not acquired to change control, and includes the certification language required for a Schedule 13G filing. Governance teams should note the disclosed ownership percentage (8.4%) for shareholder registry and potential proxy considerations.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

OmniAb, Inc.

(Name of Issuer)

Common Stock, $0.0001 par value per share

(Title of Class of Securities)

68218J103

(CUSIP Number)

06/30/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 68218J103

1

Names of Reporting Persons

Whitefort Capital Management, LP

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 10,240,146.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 10,240,146.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

10,240,146.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

8.4 %

12

Type of Reporting Person (See Instructions)

IA, PN

SCHEDULE 13G

CUSIP No. 68218J103

1

Names of Reporting Persons

David Salanic

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

FRANCE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 10,240,146.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 10,240,146.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

10,240,146.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

8.4 %

12

Type of Reporting Person (See Instructions)

IN, HC

SCHEDULE 13G

CUSIP No. 68218J103

1

Names of Reporting Persons

Joseph Kaplan

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 10,240,146.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 10,240,146.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

10,240,146.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

8.4 %

12

Type of Reporting Person (See Instructions)

IN, HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: OmniAb, Inc.
(b)	Address of issuer's principal executive offices: 5980 HORTON STREET, SUITE 600, EMERYVILLE, California, 94608
Item 2.
(a)	Name of person filing: 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.
(b)	Address or principal business office or, if none, residence: The principal business address of each of the Reporting Persons is 12 East 49th Street, 40th Floor, New York, New York 10017.
(c)	Citizenship: 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.
(d)	Title of class of securities: Common Stock, $0.0001 par value per share
(e)	CUSIP No.: 68218J103
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: As of the close of business on June 30, 2025, (i) Whitefort Management, as the investment manager of certain client accounts, may be deemed to beneficially own the 10,240,146 Shares held in such accounts; (ii) Mr. Salanic, as a Co-Managing Partner of Whitefort Management, may be deemed to beneficially own the 10,240,146 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 10,240,146 Shares held in the client accounts managed by Whitefort Management.
(b)	Percent of class: The percentage of Shares reported owned by each person named herein is based upon 122,335,336 Shares outstanding as of May 1, 2025, as reported on the Issuer's Form 10-Q filed with the Securities and Exchange Commission on May 8, 2025. As of the close of business on June 30, 2025, each of the Reporting Persons may be deemed to beneficially own 8.4% of the outstanding Shares.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: See Cover Pages Items 5-8.
	(ii) Shared power to vote or to direct the vote: See Cover Pages Items 5-8.
	(iii) Sole power to dispose or to direct the disposition of: See Cover Pages Items 5-8.
	(iv) Shared power to dispose or to direct the disposition of: See Cover Pages Items 5-8.
Item 5.	Ownership of 5 Percent or Less of a Class.
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(J), so indicate under Item 3(j) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group. See Exhibit A on the Schedule 13G filed by the Reporting Persons with the Securities and Exchange Commission on June 6, 2025.
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

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.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Whitefort Capital Management, LP

Signature:	/s/ David Salanic
Name/Title:	David Salanic, Co-Managing Partner
Date:	08/14/2025

Signature:	/s/ Joseph Kaplan
Name/Title:	Joseph Kaplan, Co-Managing Partner
Date:	08/14/2025

David Salanic

Signature:	/s/ David Salanic
Name/Title:	David Salanic
Date:	08/14/2025

Joseph Kaplan

Signature:	/s/ Joseph Kaplan
Name/Title:	Joseph Kaplan
Date:	08/14/2025

FAQ

What stake in OmniAb (OABI) does Whitefort Capital report?

Whitefort Capital Management, LP and the named partners report beneficial ownership of 10,240,146 shares, representing 8.4% of OmniAb's outstanding common stock.

As of what date is the 8.4% ownership reported?

The filing states the shares are held as of the close of business on June 30, 2025, with the percent based on 122,335,336 shares outstanding as of May 1, 2025.

Who are the individuals named in the Schedule 13G/A?

The reporting persons named are Whitefort Capital Management, LP, and Co-Managing Partners David Salanic and Joseph Kaplan.

Does the filing indicate an intent to influence control of OmniAb?

No. The certification in Item 10 states the securities were not acquired and are not held for the purpose of changing or influencing control of the issuer.

Where is Whitefort Capital Management organized and located?

Whitefort Capital Management is organized in Delaware and the principal business address for the reporting persons is 12 East 49th Street, 40th Floor, New York, NY 10017.