OmniAb Inc.
Ownership
Ownership Structure
Who owns OmniAb Inc. (OABI)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 81.3% of the shares are freely tradable; institutional investors hold 51.0%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Whitefort Capital Management, LP. | 7.05 | 10,248,658 | -27.9 | 06/30/2026 |
| BlackRock Inc | 6.12 | 8,897,490 | +9.8 | 06/30/2026 |
| Nomura Holdings Inc | 3.46 | 5,028,160 | +613.2 | 06/30/2026 |
| Cadian Capital Management LP | 2.90 | 4,211,821 | +1.3 | 06/30/2026 |
| Vanguard Capital Management, LLC | 2.65 | 3,852,356 | -3.5 | 06/30/2026 |
| Geode Capital Management, LLC | 1.98 | 2,883,978 | -1.4 | 06/30/2026 |
| Rice Hall James & Associates, LLC | 1.80 | 2,610,434 | +2.5 | 06/30/2026 |
| Private Management Group Inc | 1.61 | 2,344,770 | -3.5 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Russell 2000 ETF | 1.91 | 2,782,857 | -0.4 | 10/29/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 1.63 | 2,379,734 | +0.0 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: November 2, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.