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, Q3 2025
Institutional positions in OmniAb, Inc. as of Sep 30, 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
- 140
- −2 vs. Q2 2025
- Shares held
- 63.0M
- +8.06M (+14.7%) vs. Q2 2025
- Total value
- $100.5M
- +$5.21M (+5.5%) vs. Q2 2025
- New holders
- 16
- 33 more added
- Sold out
- 18
- 52 more reduced
2 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2025
Shares, value and share of portfolio for each institution holding OmniAb, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Whitefort Capital Management, LP | 14,223,658 | $22.8M | 7.53% | +3,983,512+38.9% | Added |
| BlackRock, Inc. | 6,964,222 | $11.1M | 0.00% | −36,957−0.5% | Reduced |
| Vanguard Group Inc | 5,148,061 | $8.24M | 0.00% | −120,254−2.3% | Reduced |
| Cadian Capital Management, LP | 3,675,568 | $5.88M | 0.35% | +3,675,568 | New |
| Woodline Partners LP | 2,857,142 | $4.57M | 0.02% | +2,857,142 | New |
| Dimensional Fund Advisors LP | 2,548,284 | $4.08M | 0.00% | −365,480−12.5% | Reduced |
| Private Management Group Inc | 2,518,279 | $4.03M | 0.12% | −39,766−1.6% | Reduced |
| Rice Hall James & Associates, LLC | 2,412,038 | $3.86M | 0.21% | −215,085−8.2% | Reduced |
| Geode Capital Management, LLC | 2,326,236 | $3.72M | 0.00% | −113,188−4.6% | Reduced |
| Stonepine Capital Management, LLC | 2,142,857 | $3.43M | 2.79% | +2,142,857 | New |
| State Street Corp | 2,094,846 | $3.35M | 0.00% | +83,937+4.2% | Added |
| ADAR1 Capital Management, LLC | 1,090,628 | $1.75M | 0.17% | +764,520+234.4% | Added |
| Jacobs Levy Equity Management, Inc | 1,006,256 | $1.61M | 0.01% | −99,268−9.0% | Reduced |
| Nuveen, LLC | 874,510 | $1.40M | 0.00% | +387,249+79.5% | Added |
| Citadel Advisors LLC | 836,799 | $1.34M | 0.00% | −1,295,793−60.8% | Reduced |
| Towerview LLC | 831,100 | $1.33M | 0.97% | 00.0% | Unchanged |
| Morgan Stanley | 820,222 | $1.31M | 0.00% | +52,601+6.9% | Added |
| Northern Trust Corp | 818,466 | $1.31M | 0.00% | −18,403−2.2% | Reduced |
| Charles Schwab Investment Management Inc | 785,477 | $1.26M | 0.00% | −46,797−5.6% | Reduced |
| JPMorgan Chase & Co | 762,912 | $1.22M | 0.00% | −30,822−3.9% | Reduced |
| Isthmus Partners, LLC | 669,071 | $1.07M | 0.24% | +101,028+17.8% | Added |
| Goldman Sachs Group Inc | 587,786 | $940.5K | 0.00% | +281,740+92.1% | Added |
| Renaissance Technologies LLC | 523,454 | $837.5K | 0.00% | −184,096−26.0% | Reduced |
| Kent Lake PR LLC | 500,000 | $800.0K | 0.41% | −1,250,000−71.4% | Reduced |
| Woodstock Corp | 351,753 | $562.8K | 0.05% | −269,931−43.4% | Reduced |
| Royal Bank of Canada | 303,163 | $485.0K | 0.00% | −38,832−11.4% | Reduced |
| Tang Capital Management LLC | 300,000 | $480.0K | 0.02% | 00.0% | Unchanged |
| Two Sigma Investments, LP | 291,735 | $466.8K | 0.00% | +60,047+25.9% | Added |
| Bank of New York Mellon Corp | 263,698 | $421.9K | 0.00% | −7,053−2.6% | Reduced |
| Gsa Capital Partners LLP | 262,371 | $420.0K | 0.04% | +236,197+902.4% | Added |
| TLS Advisors LLC | 250,185 | $388.0K | 1.13% | 00.0% | Unchanged |
| Ameriprise Financial Inc | 232,787 | $372.5K | 0.00% | −47,002−16.8% | Reduced |
| Jane Street Group, LLC | 189,082 | $302.5K | 0.00% | +35,346+23.0% | Added |
| D. E. Shaw & Co., Inc. | 186,281 | $298.0K | 0.00% | +186,281 | New |
| Graham Capital Management, L.P. | 167,172 | $267.5K | 0.01% | +167,172 | New |
| Millennium Management LLC | 285,801 | $260.1K | 0.00% | −364,515−56.1% | Reduced |
| Rhumbline Advisers | 160,936 | $257.5K | 0.00% | +208+0.1% | Added |
| Arbiter Partners Capital Management LLC | 160,529 | $256.8K | 0.18% | +160,529 | New |
| FMR LLC | 154,546 | $247.3K | 0.00% | +16,745+12.2% | Added |
| Bridgeway Capital Management, LLC | 153,900 | $246.2K | 0.01% | +100,000+185.5% | Added |
| Alliancebernstein L.P. | 150,592 | $240.9K | 0.00% | 00.0% | Unchanged |
| Barclays PLC | 143,710 | $229.9K | 0.00% | −37,967−20.9% | Reduced |
| Two Sigma Advisers, LP | 126,030 | $201.6K | 0.00% | +18,100+16.8% | Added |
| Invesco Ltd. | 124,051 | $198.5K | 0.00% | +14,438+13.2% | Added |
| Cornerstone Capital, Inc. | 109,211 | $174.7K | 0.02% | −54,551−33.3% | Reduced |
| Public Employees Retirement System of Ohio | 96,361 | $154.2K | 0.00% | 00.0% | Unchanged |
| SEI Investments Co | 81,045 | $129.7K | 0.00% | +19,919+32.6% | Added |
| Wells Fargo & Company | 80,596 | $129.0K | 0.00% | +6,955+9.4% | Added |
| Deutsche Bank AG | 77,997 | $124.8K | 0.00% | −89,554−53.4% | Reduced |
| HRT Financial LP | 70,215 | $112.0K | 0.00% | +70,215 | New |
| Connors Investor Services Inc | 61,941 | $99.1K | 0.01% | −59−0.1% | Reduced |
| MetLife Investment Management | 56,660 | $90.7K | 0.00% | −7,075−11.1% | Reduced |
| Price T Rowe Associates Inc | 53,190 | $86.0K | 0.00% | +5,574+11.7% | Added |
| Brevan Howard Capital Management LP | 52,270 | $83.6K | 0.00% | −1,509−2.8% | Reduced |
| Intech Investment Management LLC | 50,565 | $80.9K | 0.00% | −7,659−13.2% | Reduced |
| Bank of America Corp | 48,030 | $76.8K | 0.00% | −23,001−32.4% | Reduced |
| Blair William & Co | 45,171 | $72.3K | 0.00% | 00.0% | Unchanged |
| Mirae Asset Global ETFs Holdings Ltd. | 43,448 | $69.5K | 0.00% | −12,180−21.9% | Reduced |
| JustInvest LLC | 41,694 | $66.7K | 0.00% | −3,471−7.7% | Reduced |
| UBS Group AG | 39,664 | $63.5K | 0.00% | −98,798−71.4% | Reduced |
| Squarepoint Ops LLC | 35,431 | $56.7K | 0.00% | +18,890+114.2% | Added |
| Cerity Partners LLC | 29,562 | $47.3K | 0.00% | +6,950+30.7% | Added |
| Legato Capital Management LLC | 28,189 | $45.1K | 0.00% | 00.0% | Unchanged |
| CI Private Wealth, LLC | 27,289 | $43.7K | 0.00% | −2,964−9.8% | Reduced |
| Pinnacle Wealth Planning Services, Inc. | 24,636 | $39.4K | 0.00% | +24,636 | New |
| NJ State Employees Deferred Compensation Plan | 24,500 | $39.2K | 0.00% | 00.0% | Unchanged |
| AQR Capital Management LLC | 23,087 | $36.9K | 0.00% | +296+1.3% | Added |
| Police & Firemen's Retirement System of New Jersey | 22,568 | $36.1K | 0.00% | +3,954+21.2% | Added |
| BNP Paribas Arbitrage, SA | 21,721 | $34.8K | 0.00% | +10,438+92.5% | Added |
| China Universal Asset Management Co., Ltd. | 21,508 | $34.4K | 0.00% | −3,063−12.5% | Reduced |
| HighTower Advisors, LLC | 21,382 | $34.2K | 0.00% | 00.0% | Unchanged |
| BFSG, LLC | 20,435 | $32.7K | 0.00% | −2,800−12.1% | Reduced |
| ProShare Advisors LLC | 20,363 | $32.6K | 0.00% | −4,775−19.0% | Reduced |
| BBR Partners, LLC | 20,000 | $32.0K | 0.00% | 00.0% | Unchanged |
| Voya Investment Management LLC | 19,496 | $31.2K | 0.00% | −11,076−36.2% | Reduced |
| LPL Financial LLC | 18,800 | $30.1K | 0.00% | −891−4.5% | Reduced |
| Quadrature Capital Ltd | 17,446 | $27.7K | 0.00% | +5,188+42.3% | Added |
| Thrive Wealth Management, LLC | 17,281 | $27.6K | 0.00% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 14,925 | $23.9K | 0.00% | −106,619−87.7% | Reduced |
| Advisor Group Holdings, Inc. | 13,522 | $21.7K | 0.00% | −725−5.1% | Reduced |
| Dynamic Technology Lab Private Ltd | 13,435 | $21.0K | 0.00% | +878+7.0% | Added |
| Prudential Financial Inc | 12,543 | $20.1K | 0.00% | 00.0% | Unchanged |
| RSM US Wealth Management LLC | 12,380 | $19.8K | 0.00% | +589+5.0% | Added |
| SG Americas Securities, LLC | 11,772 | $19.0K | 0.00% | −2,348−16.6% | Reduced |
| New York State Common Retirement Fund | 11,806 | $18.9K | 0.00% | 00.0% | Unchanged |
| Cubist Systematic Strategies, LLC | 11,310 | $18.1K | 0.00% | −60,835−84.3% | Reduced |
| Citigroup Inc | 11,118 | $17.8K | 0.00% | −28,801−72.1% | Reduced |
| Nelson, Van Denburg & Campbell Wealth Management Group, LLC | 10,704 | $17.1K | 0.00% | −447−4.0% | Reduced |
| Court Place Advisors, LLC | 10,533 | $16.9K | 0.01% | −5,390−33.9% | Reduced |
| Victory Capital Management Inc | 10,071 | $16.1K | 0.00% | −1,698−14.4% | Reduced |
| Bay Colony Advisory Group, Inc d/b/a Bay Colony Advisors | 10,000 | $16.0K | 0.00% | 00.0% | Unchanged |
| Ameritas Investment Partners, Inc. | 9,652 | $15.4K | 0.00% | 00.0% | Unchanged |
| Russell Investments Group, Ltd. | 9,586 | $15.3K | 0.00% | +8,827+1,163.0% | Added |
| Legal & General Group Plc | 9,557 | $15.3K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 8,343 | $13.3K | 0.00% | −7,988−48.9% | Reduced |
| Steigerwald, Gordon & Koch Inc. | 7,673 | $12.3K | 0.00% | +7,673 | New |
| California State Teachers Retirement System | 6,692 | $10.7K | 0.00% | +5+0.1% | Added |
| Spire Wealth Management | 6,510 | $10.4K | 0.00% | 00.0% | Unchanged |
| CWM, LLC | 6,055 | $10.0K | 0.00% | −1,482−19.7% | Reduced |
| Sterling Capital Management LLC | 5,567 | $8.91K | 0.00% | +3,163+131.6% | Added |