OmniAb, Inc.
OABI- Exchange
- Nasdaq
- Industry
- Services-Commercial Physical & Biological Research
- SEC CIK
- 0001846253
No open-market purchases or sales by OmniAb, Inc. insiders were filed in the last 90 days; 131 institutions reported holding it in 13F filings for Q2 2026, worth $144.2M in total; no superinvestor holds it.
Other share classesOABIW
13F holders, Q4 2025
Institutional positions in OmniAb, Inc. as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 129
- −7 vs. Q3 2025
- Shares held
- 57.3M
- −5.15M (−8.2%) vs. Q3 2025
- Total value
- $105.8M
- +$6.08M (+6.1%) vs. Q3 2025
- New holders
- 14
- 41 more added
- Sold out
- 21
- 39 more reduced
4 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting OABI on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 131 | $144.2M |
| Q1 2026 | 128 | $87.7M |
| Q4 2025 | 129 | $105.8M |
| Q3 2025 | 140 | $100.5M |
| Q2 2025 | 144 | $95.5M |
| Q1 2025 | 153 | $152.0M |
| Q4 2024 | 165 | $224.7M |
| Q3 2024 | 165 | $334.6M |
| Q2 2024 | 160 | $293.9M |
| Q1 2024 | 153 | $450.4M |
| Q4 2023 | 157 | $514.0M |
| Q3 2023 | 148 | $355.9M |
| Q2 2023 | 144 | $338.6M |
| Q1 2023 | 142 | $243.3M |
| Q4 2022 | 148 | $234.9M |
| Q3 2022 | 1 | $11.2M |
| Q2 2022 | 0 | $0 |
| Q1 2022 | 0 | $0 |
| Q4 2021 | 0 | $0 |
| Q3 2021 | 0 | $0 |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q4 2025
Shares, value and share of portfolio for each institution holding OmniAb, Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Bridgeway Capital Management, LLC | 198,900 | $368.0K | 0.01% | +45,000+29.2% | Added |
| FMR LLC | 198,980 | $368.1K | 0.00% | +44,434+28.8% | Added |
| Jacobs Levy Equity Management, Inc | 238,189 | $440.6K | 0.00% | −768,067−76.3% | Reduced |
| Renaissance Technologies LLC | 242,700 | $449.0K | 0.00% | −280,754−53.6% | Reduced |
| Bank of New York Mellon Corp | 268,645 | $497.0K | 0.00% | +4,947+1.9% | Added |
| Citadel Advisors LLC | 285,134 | $527.5K | 0.00% | −551,665−65.9% | Reduced |
| Woodline Partners LP | 285,714 | $528.6K | 0.00% | −2,571,428−90.0% | Reduced |
| JPMorgan Chase & Co | 293,168 | $542.4K | 0.00% | −469,744−61.6% | Reduced |
| D. E. Shaw & Co., Inc. | 383,152 | $708.8K | 0.00% | +196,871+105.7% | Added |
| Morgan Stanley | 389,687 | $720.9K | 0.00% | −430,535−52.5% | Reduced |
| Two Sigma Investments, LP | 423,104 | $782.7K | 0.00% | +131,369+45.0% | Added |
| Goldman Sachs Group Inc | 540,277 | $999.5K | 0.00% | −47,509−8.1% | Reduced |
| Millennium Management LLC | 673,395 | $1.02M | 0.00% | +387,594+135.6% | Added |
| Stonepine Capital Management, LLC | 701,000 | $1.30M | 1.03% | −1,441,857−67.3% | Reduced |
| ADAR1 Capital Management, LLC | 702,190 | $1.30M | 0.10% | −388,438−35.6% | Reduced |
| Isthmus Partners, LLC | 721,309 | $1.33M | 0.15% | +52,238+7.8% | Added |
| Northern Trust Corp | 829,021 | $1.53M | 0.00% | +10,555+1.3% | Added |
| Nuveen, LLC | 874,512 | $1.62M | 0.00% | +20.0% | Added |
| Charles Schwab Investment Management Inc | 966,026 | $1.79M | 0.00% | +180,549+23.0% | Added |
| Towerview LLC | 1,000,000 | $1.85M | 1.34% | +168,900+20.3% | Added |
| State Street Corp | 2,048,996 | $3.79M | 0.00% | −45,850−2.2% | Reduced |
| Dimensional Fund Advisors LP | 2,152,593 | $3.98M | 0.00% | −395,691−15.5% | Reduced |
| Rice Hall James & Associates, LLC | 2,401,088 | $4.44M | 0.24% | −10,950−0.5% | Reduced |
| Private Management Group Inc | 2,420,478 | $4.48M | 0.13% | −97,801−3.9% | Reduced |
| Geode Capital Management, LLC | 2,722,692 | $5.04M | 0.00% | +396,456+17.0% | Added |
| Cadian Capital Management, LP | 4,434,954 | $8.20M | 0.59% | +759,386+20.7% | Added |
| Vanguard Group Inc | 5,625,197 | $10.4M | 0.00% | +477,136+9.3% | Added |
| BlackRock, Inc. | 8,064,981 | $14.9M | 0.00% | +1,100,759+15.8% | Added |
| Whitefort Capital Management, LP | 14,223,658 | $26.3M | 7.96% | 00.0% | Unchanged |
| Tang Capital Management LLC | 0 | $0 | 0.00% | −300,000−100.0% | Sold out |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −262,371−100.0% | Sold out |
| Graham Capital Management, L.P. | 0 | $0 | 0.00% | −167,172−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −70,215−100.0% | Sold out |
| Cerity Partners LLC | 0 | $0 | 0.00% | −29,562−100.0% | Sold out |
| CI Private Wealth, LLC | 0 | $0 | 0.00% | −27,289−100.0% | Sold out |
| Pinnacle Wealth Planning Services, Inc. | 0 | $0 | 0.00% | −24,636−100.0% | Sold out |
| NJ State Employees Deferred Compensation Plan | 0 | $0 | 0.00% | −24,500−100.0% | Sold out |
| Quadrature Capital Ltd | 0 | $0 | 0.00% | −17,446−100.0% | Sold out |
| Dynamic Technology Lab Private Ltd | 0 | $0 | 0.00% | −13,435−100.0% | Sold out |
| Prudential Financial Inc | 0 | $0 | 0.00% | −12,543−100.0% | Sold out |
| Bay Colony Advisory Group, Inc d/b/a Bay Colony Advisors | 0 | $0 | 0.00% | −10,000−100.0% | Sold out |
| Fortitude Family Office, LLC | 0 | $0 | 0.00% | −2,112−100.0% | Sold out |
| Rockefeller Capital Management L.P. | 0 | $0 | 0.00% | −980−100.0% | Sold out |
| Parkside Financial Bank & Trust | 0 | $0 | 0.00% | −344−100.0% | Sold out |
| The PNC Financial Services Group, Inc. | 0 | $0 | 0.00% | −318−100.0% | Sold out |
| Wolverine Asset Management LLC | 0 | $0 | 0.00% | −58−100.0% | Sold out |
| Transamerica Financial Advisors, Inc. | 0 | $0 | 0.00% | −48−100.0% | Sold out |
| Umb Bank N A | 0 | $0 | 0.00% | −29−100.0% | Sold out |
| Mather Group, LLC. | 0 | $0 | 0.00% | −21−100.0% | Sold out |
| IFP Advisors, Inc | 0 | $0 | 0.00% | −4−100.0% | Sold out |
| Kent Lake PR LLC | – | – | – | – | Not filed |
| Cubist Systematic Strategies, LLC | – | – | – | – | Not filed |
| Court Place Advisors, LLC | – | – | – | – | Not filed |
| Point72 Asia (Singapore) Pte. Ltd. | – | – | – | – | Not filed |