Whitefort Capital group reports 7.1% OmniAb (OABI) ownership in amended filing

Rhea-AI Filing Summary

OmniAb, Inc. has a significant shareholder group led by Whitefort Capital Management, LP, together with David Salanic and Joseph Kaplan, reporting their ownership on an amended Schedule 13G. As of the close of business on June 30, 2026, the group may be deemed to beneficially own 10,248,658 shares of OmniAb common stock. This represents 7.1% of the outstanding shares, based on 144,972,579 shares outstanding as of April 30, 2026 as reported by OmniAb. The shares are held in client accounts managed by Whitefort Capital Management, with voting and dispositive power shared among the reporting persons.

Key Figures

Shares beneficially owned: 10,248,658 shares Ownership percentage: 7.1% Shares outstanding: 144,972,579 shares

3 metrics

Shares beneficially owned 10,248,658 shares Beneficially owned by the Whitefort reporting group as of June 30, 2026

Ownership percentage 7.1% Percent of OmniAb common stock beneficially owned by each reporting person

Shares outstanding 144,972,579 shares OmniAb shares outstanding as of April 30, 2026, per Form 10-Q

Key Terms

beneficially own, dispositive power, Schedule 13G, Reporting Persons

4 terms

beneficially own financial

"may be deemed to beneficially own the 10,248,658 Shares held in such accounts"

Beneficially own means having the economic rights and risks of a security—such as the right to receive dividends, sell the shares, or profit from price changes—whether or not your name appears on the official share register. Think of it like renting a car: you use it and reap the benefits even if the title lists someone else. Investors care because beneficial ownership determines who truly controls value, must be disclosed under securities rules, and can signal potential influence or trading activity that affects a stock’s price.

dispositive power financial

"may be deemed to have voting and dispositive power with respect to shares"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

Schedule 13G regulatory

"These persons filing this statement on an amended Schedule 13G"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

Reporting Persons regulatory

"the names of the persons filing this statement on are (collectively, the "Reporting Persons")"

FAQ

How much of OmniAb, Inc. (OABI) does Whitefort Capital report owning?

Whitefort Capital Management and related reporting persons may be deemed to beneficially own 10,248,658 shares of OmniAb common stock. This stake represents 7.1% of the outstanding shares as of June 30, 2026, based on the issuer’s April 30, 2026 share count.

What percentage of OmniAb, Inc. (OABI) is held by the Whitefort reporting group?

The reporting group states beneficial ownership of 7.1% of OmniAb’s common stock. This percentage is calculated using 144,972,579 shares outstanding as of April 30, 2026, as reported by OmniAb in its Form 10-Q.

Who are the reporting persons in the OmniAb, Inc. (OABI) Schedule 13G/A?

The reporting persons are Whitefort Capital Management, LP, David Salanic, and Joseph Kaplan. Whitefort acts as investment manager to certain client accounts, and Salanic and Kaplan are Co-Managing Partners who may share voting and dispositive power over the reported shares.

Do the Whitefort reporting persons have sole or shared voting power in OmniAb, Inc. (OABI)?

Each reporting person reports 0 shares with sole voting or dispositive power and 10,248,658 shares with shared voting and dispositive power. The shares are held in client accounts managed by Whitefort Capital Management.

What share count did OmniAb, Inc. (OABI) use to calculate the 7.1% ownership?

The 7.1% ownership is based on 144,972,579 shares of OmniAb common stock outstanding as of April 30, 2026. This outstanding share figure comes from OmniAb’s Form 10-Q filed on May 7, 2026.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/14/2026 - 04:49 PM Accepted by SEC EDGAR 08/14/2026 - 04:48 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 3)

OmniAb, Inc.

(Name of Issuer)

Common Stock, $0.0001 par value per share

(Title of Class of Securities)

68218J103

(CUSIP Number)

06/30/2026

(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)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 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 10,248,658.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 10,248,658.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

10,248,658.00

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)

7.1 %

12

Type of Reporting Person (See Instructions)

PN, IA

SCHEDULE 13G

CUSIP Number(s): 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 10,248,658.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 10,248,658.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

10,248,658.00

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)

7.1 %

12

Type of Reporting Person (See Instructions)

IN, HC

SCHEDULE 13G

CUSIP Number(s): 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 10,248,658.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 10,248,658.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

10,248,658.00

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)

7.1 %

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, 2026, (i) Whitefort Management, as the investment manager of certain client accounts, may be deemed to beneficially own the 10,248,658 Shares held in such accounts; (ii) Mr. Salanic, as a Co-Managing Partner of Whitefort Management, may be deemed to beneficially own the 10,248,658 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 10,248,658 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 144,972,579 Shares outstanding as of April 30, 2026, as reported on the Issuer's Form 10-Q filed with the Securities and Exchange Commission on May 7, 2026. As of the close of business on June 30, 2026, each of the Reporting Persons may be deemed to beneficially own 7.1% 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.
	Not Applicable
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:	08/14/2026

Signature:	/s/ Joseph Kaplan
Name/Title:	Joseph Kaplan, Co-Managing Partner
Date:	08/14/2026

David Salanic

Signature:	/s/ David Salanic
Name/Title:	DAVID SALANIC
Date:	08/14/2026

Joseph Kaplan

Signature:	/s/ Joseph Kaplan
Name/Title:	JOSEPH KAPLAN
Date:	08/14/2026