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 |
|---|---|---|---|---|---|
| Whitefort Capital Management, LP | 14,223,658 | $26.3M | 7.96% | 00.0% | Unchanged |
| BlackRock, Inc. | 8,064,981 | $14.9M | 0.00% | +1,100,759+15.8% | Added |
| Vanguard Group Inc | 5,625,197 | $10.4M | 0.00% | +477,136+9.3% | Added |
| Cadian Capital Management, LP | 4,434,954 | $8.20M | 0.59% | +759,386+20.7% | Added |
| Geode Capital Management, LLC | 2,722,692 | $5.04M | 0.00% | +396,456+17.0% | Added |
| Private Management Group Inc | 2,420,478 | $4.48M | 0.13% | −97,801−3.9% | Reduced |
| Rice Hall James & Associates, LLC | 2,401,088 | $4.44M | 0.24% | −10,950−0.5% | Reduced |
| Dimensional Fund Advisors LP | 2,152,593 | $3.98M | 0.00% | −395,691−15.5% | Reduced |
| State Street Corp | 2,048,996 | $3.79M | 0.00% | −45,850−2.2% | Reduced |
| Towerview LLC | 1,000,000 | $1.85M | 1.34% | +168,900+20.3% | Added |
| Charles Schwab Investment Management Inc | 966,026 | $1.79M | 0.00% | +180,549+23.0% | Added |
| Nuveen, LLC | 874,512 | $1.62M | 0.00% | +20.0% | Added |
| Northern Trust Corp | 829,021 | $1.53M | 0.00% | +10,555+1.3% | Added |
| Isthmus Partners, LLC | 721,309 | $1.33M | 0.15% | +52,238+7.8% | Added |
| ADAR1 Capital Management, LLC | 702,190 | $1.30M | 0.10% | −388,438−35.6% | Reduced |
| Stonepine Capital Management, LLC | 701,000 | $1.30M | 1.03% | −1,441,857−67.3% | Reduced |
| Millennium Management LLC | 673,395 | $1.02M | 0.00% | +387,594+135.6% | Added |
| Goldman Sachs Group Inc | 540,277 | $999.5K | 0.00% | −47,509−8.1% | Reduced |
| Two Sigma Investments, LP | 423,104 | $782.7K | 0.00% | +131,369+45.0% | Added |
| Morgan Stanley | 389,687 | $720.9K | 0.00% | −430,535−52.5% | Reduced |
| D. E. Shaw & Co., Inc. | 383,152 | $708.8K | 0.00% | +196,871+105.7% | Added |
| JPMorgan Chase & Co | 293,168 | $542.4K | 0.00% | −469,744−61.6% | Reduced |
| Woodline Partners LP | 285,714 | $528.6K | 0.00% | −2,571,428−90.0% | Reduced |
| Citadel Advisors LLC | 285,134 | $527.5K | 0.00% | −551,665−65.9% | Reduced |
| Bank of New York Mellon Corp | 268,645 | $497.0K | 0.00% | +4,947+1.9% | Added |
| Renaissance Technologies LLC | 242,700 | $449.0K | 0.00% | −280,754−53.6% | Reduced |
| Jacobs Levy Equity Management, Inc | 238,189 | $440.6K | 0.00% | −768,067−76.3% | Reduced |
| FMR LLC | 198,980 | $368.1K | 0.00% | +44,434+28.8% | Added |
| Bridgeway Capital Management, LLC | 198,900 | $368.0K | 0.01% | +45,000+29.2% | Added |
| Two Sigma Advisers, LP | 197,530 | $365.4K | 0.00% | +71,500+56.7% | Added |
| Arbiter Partners Capital Management LLC | 192,585 | $356.3K | 0.19% | +32,056+20.0% | Added |
| Barclays PLC | 165,557 | $306.3K | 0.00% | +21,847+15.2% | Added |
| Rhumbline Advisers | 162,773 | $301.1K | 0.00% | +1,837+1.1% | Added |
| Nomura Holdings Inc | 154,951 | $286.7K | 0.00% | +154,951 | New |
| Alliancebernstein L.P. | 150,592 | $278.6K | 0.00% | 00.0% | Unchanged |
| Invesco Ltd. | 136,309 | $252.2K | 0.00% | +12,258+9.9% | Added |
| Jane Street Group, LLC | 135,378 | $250.4K | 0.00% | −53,704−28.4% | Reduced |
| Wells Fargo & Company | 125,636 | $232.4K | 0.00% | +45,040+55.9% | Added |
| Cornerstone Capital, Inc. | 109,211 | $202.0K | 0.02% | 00.0% | Unchanged |
| Bank of America Corp | 83,088 | $153.7K | 0.00% | +35,058+73.0% | Added |
| Deutsche Bank AG | 77,225 | $142.9K | 0.00% | −772−1.0% | Reduced |
| TLS Advisors LLC | 70,000 | $137.0K | 0.36% | −180,185−72.0% | Reduced |
| UBS Group AG | 67,974 | $125.8K | 0.00% | +28,310+71.4% | Added |
| Connors Investor Services Inc | 61,941 | $114.6K | 0.01% | 00.0% | Unchanged |
| Price T Rowe Associates Inc | 53,190 | $100.0K | 0.00% | 00.0% | Unchanged |
| Mirae Asset Global ETFs Holdings Ltd. | 48,843 | $90.4K | 0.00% | +5,395+12.4% | Added |
| Boothbay Fund Management, LLC | 47,596 | $88.1K | 0.00% | +47,596 | New |
| Acadian Asset Management LLC | 47,625 | $88.0K | 0.00% | +47,625 | New |
| Blair William & Co | 43,211 | $79.9K | 0.00% | −1,960−4.3% | Reduced |
| SEI Investments Co | 42,860 | $79.3K | 0.00% | −38,185−47.1% | Reduced |
| Intech Investment Management LLC | 37,820 | $70.0K | 0.00% | −12,745−25.2% | Reduced |
| MetLife Investment Management | 36,552 | $67.6K | 0.00% | −20,108−35.5% | Reduced |
| Woodstock Corp | 35,240 | $65.2K | 0.01% | −316,513−90.0% | Reduced |
| Ameriprise Financial Inc | 32,749 | $60.6K | 0.00% | −200,038−85.9% | Reduced |
| JustInvest LLC | 31,437 | $58.2K | 0.00% | −10,257−24.6% | Reduced |
| Legato Capital Management LLC | 30,679 | $56.8K | 0.00% | +2,490+8.8% | Added |
| Manufacturers Life Insurance Company, The | 28,943 | $53.5K | 0.00% | +28,943 | New |
| BNP Paribas Arbitrage, SA | 25,870 | $47.9K | 0.00% | +4,149+19.1% | Added |
| ProShare Advisors LLC | 25,576 | $47.3K | 0.00% | +5,213+25.6% | Added |
| Brevan Howard Capital Management LP | 24,415 | $45.2K | 0.00% | −27,855−53.3% | Reduced |
| AQR Capital Management LLC | 24,153 | $44.7K | 0.00% | +1,066+4.6% | Added |
| China Universal Asset Management Co., Ltd. | 23,457 | $43.4K | 0.00% | +1,949+9.1% | Added |
| SG Americas Securities, LLC | 23,141 | $43.0K | 0.00% | +11,369+96.6% | Added |
| Police & Firemen's Retirement System of New Jersey | 22,568 | $41.8K | 0.00% | 00.0% | Unchanged |
| HighTower Advisors, LLC | 21,382 | $39.6K | 0.00% | 00.0% | Unchanged |
| Algert Global LLC | 20,498 | $37.9K | 0.00% | +20,498 | New |
| BFSG, LLC | 20,435 | $37.8K | 0.00% | 00.0% | Unchanged |
| Squarepoint Ops LLC | 20,326 | $37.6K | 0.00% | −15,105−42.6% | Reduced |
| BBR Partners, LLC | 20,000 | $37.0K | 0.00% | 00.0% | Unchanged |
| Voya Investment Management LLC | 19,496 | $36.1K | 0.00% | 00.0% | Unchanged |
| LPL Financial LLC | 19,354 | $35.8K | 0.00% | +554+2.9% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 18,945 | $35.0K | 0.00% | +18,945 | New |
| Thrive Wealth Management, LLC | 17,281 | $32.0K | 0.00% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 15,958 | $29.5K | 0.00% | +1,033+6.9% | Added |
| Advisor Group Holdings, Inc. | 15,468 | $28.6K | 0.00% | +1,946+14.4% | Added |
| Public Employees Retirement System of Ohio | 15,321 | $28.3K | 0.00% | −81,040−84.1% | Reduced |
| Victory Capital Management Inc | 12,552 | $23.2K | 0.00% | +2,481+24.6% | Added |
| State of Wyoming | 12,243 | $22.6K | 0.00% | +12,243 | New |
| XTX Topco Ltd | 12,022 | $22.2K | 0.00% | +12,022 | New |
| New York State Common Retirement Fund | 11,806 | $21.8K | 0.00% | 00.0% | Unchanged |
| Russell Investments Group, Ltd. | 10,939 | $20.2K | 0.00% | +1,353+14.1% | Added |
| Nelson, Van Denburg & Campbell Wealth Management Group, LLC | 10,704 | $19.8K | 0.00% | 00.0% | Unchanged |
| RSM US Wealth Management LLC | 10,451 | $19.4K | 0.00% | −1,929−15.6% | Reduced |
| Ameritas Investment Partners, Inc. | 9,652 | $17.9K | 0.00% | 00.0% | Unchanged |
| Legal & General Group Plc | 9,557 | $17.7K | 0.00% | 00.0% | Unchanged |
| Steigerwald, Gordon & Koch Inc. | 7,673 | $14.2K | 0.00% | 00.0% | Unchanged |
| Mirae Asset Global Investments Co., Ltd. | 6,995 | $12.9K | 0.00% | +2,251+47.4% | Added |
| Citigroup Inc | 6,868 | $12.7K | 0.00% | −4,250−38.2% | Reduced |
| MAI Capital Management | 6,736 | $12.5K | 0.00% | +6,736 | New |
| California State Teachers Retirement System | 6,476 | $12.0K | 0.00% | −216−3.2% | Reduced |
| Tower Research Capital LLC (TRC) | 6,270 | $11.6K | 0.00% | −2,073−24.8% | Reduced |
| Sterling Capital Management LLC | 5,622 | $10.4K | 0.00% | +55+1.0% | Added |
| Royal Bank of Canada | 4,802 | $9.00K | 0.00% | −298,361−98.4% | Reduced |
| Amalgamated Bank | 3,304 | $6.00K | 0.00% | +134+4.2% | Added |
| GF Fund Management Co. Ltd. | 2,828 | $5.23K | 0.00% | +241+9.3% | Added |
| CWM, LLC | 2,493 | $5.00K | 0.00% | −3,562−58.8% | Reduced |
| Smartleaf Asset Management LLC | 2,458 | $4.57K | 0.00% | −931−27.5% | Reduced |
| Jackson, Grant Investment Advisers, Inc. | 2,450 | $4.53K | 0.00% | 00.0% | Unchanged |
| Redwood Park Advisors LLC | 2,184 | $4.04K | 0.00% | 00.0% | Unchanged |
| Allworth Financial LP | 2,127 | $3.94K | 0.00% | 00.0% | Unchanged |