As of November 6, 2026, OmniAb, Inc. is a publicly traded company (Nasdaq: OABI); its largest reported holder is Robert Goldstein, with 8.5% on Schedule 13G/A of February 10, 2026, then Whitefort Capital Management, LP (7.1%). The largest insider holding is Matthew W. Foehr, the chief executive and president, with 4,420,492 shares (3.0% of shares outstanding), per Form 4 of April 7, 2026 (Schedule 13G/A, February 10, 2026).
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Is OmniAb, Inc. a real, registered company?
- OmniAb, Inc. files with the SEC under CIK 1846253 (its SEC filings).
- Its shares are listed under the ticker OABI on Nasdaq (also OABIW) (SEC company record).
- Incorporated in Delaware; business address in Emeryville, California, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under OmniAb, Inc. in our court records and SEC 8-K records (as of 2026-11-06).
- Leadership changes: the latest reported is Amechi Nwachuku, Chief Operating Officer (Form 8-K filed 2026-07-13). Check you are dealing with the people now in charge.
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Whitefort Capital Management, LP (filed 2026-08-14).
Who are OmniAb, Inc.'s owners and officers?
OmniAb, Inc.: incorporated in Delaware; business address in Emeryville, California; industry Services-Commercial Physical & Biological Research (Schedule 13G/A, 2026-08-14).
Officers and directors, each with the role and the filing that names them:
- : Executive Officer, Director (Form D, 2025-09-10)
- : Executive Officer (Form D, 2025-09-10)
- : Executive Officer (Form D, 2025-09-10)
- : Director (Form D, 2025-09-10)
- : Director (Form D, 2025-09-10)
- : Director (Form D, 2025-09-10)
- : Director (Form D, 2025-09-10)
- : Director (Form D, 2025-09-10)
- : Director (Form D, 2025-09-10)
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-08-14 | Whitefort Capital Management, LP | 7.1% |
| Schedule 13G/A, 2026-02-10 | Robert Goldstein | 8.5% |
| Schedule 13G/A, 2025-11-14 | Whitefort Capital Management, LP | 9.9% |
| Schedule 13G/A, 2025-08-27 | Robert Goldstein | 7% |
| Schedule 13G/A, 2025-08-14 | Janus Henderson Group PLC | 0.8% |
| Schedule 13G/A, 2025-08-14 | Whitefort Capital Management, LP | 8.4% |
| Schedule 13G, 2025-07-01 | Robert Goldstein | 5.3% |
Questions about who owns OmniAb, Inc.
Who owns OmniAb, Inc.?
On this page, 2 holders' latest ownership filings report 5% or more of OmniAb, Inc.: Robert Goldstein (8.5%, Schedule 13G/A, filed 2026-02-10) and Whitefort Capital Management, LP (7.1%, Schedule 13G/A, filed 2026-08-14).
Who are the largest shareholders of OmniAb, Inc.?
By the share each holder's latest filing reports, the largest holders of OmniAb, Inc. on this page are Robert Goldstein (8.5%) and Whitefort Capital Management, LP (7.1%).
When did Robert Goldstein buy into OmniAb, Inc.?
The filings give report dates, not purchase dates. The earliest filing from Robert Goldstein on this page is the Schedule 13G, filed 2025-07-01, reporting 5.3%; its latest, Schedule 13G/A filed 2026-02-10, reports 8.5%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 7 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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What the Full Report on OmniAb, Inc. covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
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| Filed | Person | Role | Change | Effective |
|---|---|---|---|---|
| Form 8-K, 2026-07-13 | Amechi Nwachuku | Chief Operating Officer | appointed | 2026-07-13 |
Which insiders own OmniAb, Inc. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , the chief executive and president: 4,420,492 shares (3.0% of shares outstanding) (Form 4, 2026-04-07).
- , a director: 2,962,320 shares (2.0% of shares outstanding) (Form 4, 2026-06-18).
- , the chief legal officer: 399,085 shares (0.27% of shares outstanding) (Form 4, 2026-04-07).
- , the chief financial officer and executive vice president: 261,483 shares (0.18% of shares outstanding) (Form 4, 2026-04-07).
- , a director: 185,274 shares (0.13% of shares outstanding) (Form 4, 2026-06-18).
Shares outstanding: 145,860,318 as of 2026-10-23, from the company's latest SEC cover page.
How much has OmniAb, Inc. raised?
| Filed | Sold | Offered |
|---|---|---|
| Form D, 2025-09-10 | $30M | $30M |
Keep reading
More on OmniAb, Inc. and the records around it.
OmniAb, Inc. elsewhere on the record
- 5%+ stake filings Aug 2026
- Leadership changes Jul 2026
- Form D filing Sep 2025
Companies that share a holder
- Whitefort Capital Management, LP also filed stake reports on 3 other companies: Arbutus Biopharma Corp (Sep 2026), Bally's Corp (Mar 2026), INNOVATE Corp. (Nov 2025)
- JANUS HENDERSON GROUP PLC also filed stake reports on 104 other companies: SURGERY PARTNERS, INC. (Nov 2026), EYEPOINT, INC. (Sep 2026), TELEFLEX INCORPORATED (Sep 2026)
Related pages
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