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, Q1 2026
Institutional positions in OmniAb, Inc. as of Mar 31, 2026. 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
- 128
- +2 vs. Q4 2025
- Shares held
- 56.0M
- +4.28M (+8.3%) vs. Q4 2025
- Total value
- $87.7M
- −$7.68M (−8.1%) vs. Q4 2025
- New holders
- 24
- 42 more added
- Sold out
- 22
- 38 more reduced
3 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding OmniAb, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Whitefort Capital Management, LP | 14,223,658 | $22.3M | 6.80% | 00.0% | Unchanged |
| BlackRock, Inc. | 8,106,881 | $12.7M | 0.00% | +41,900+0.5% | Added |
| Cadian Capital Management, LP | 4,157,129 | $6.53M | 0.79% | −277,825−6.3% | Reduced |
| Vanguard Capital Management LLC | 3,993,652 | $6.27M | 0.00% | +3,993,652 | New |
| Geode Capital Management, LLC | 2,925,579 | $4.59M | 0.00% | +202,887+7.5% | Added |
| Rice Hall James & Associates, LLC | 2,547,255 | $4.00M | 0.22% | +146,167+6.1% | Added |
| Private Management Group Inc | 2,429,166 | $3.81M | 0.11% | +8,688+0.4% | Added |
| State Street Corp | 2,067,143 | $3.25M | 0.00% | +18,147+0.9% | Added |
| Dimensional Fund Advisors LP | 1,745,248 | $2.74M | 0.00% | −407,345−18.9% | Reduced |
| Towerview LLC | 1,000,000 | $1.57M | 1.01% | 00.0% | Unchanged |
| Charles Schwab Investment Management Inc | 959,573 | $1.51M | 0.00% | −6,453−0.7% | Reduced |
| Vanguard Portfolio Management LLC | 903,799 | $1.42M | 0.00% | +903,799 | New |
| Northern Trust Corp | 880,895 | $1.38M | 0.00% | +51,874+6.3% | Added |
| Isthmus Partners, LLC | 756,674 | $1.19M | 0.12% | +35,365+4.9% | Added |
| Vanguard Fiduciary Trust Co | 725,608 | $1.14M | 0.00% | +725,608 | New |
| ADAR1 Capital Management, LLC | 705,190 | $1.11M | 0.07% | +3,000+0.4% | Added |
| Nomura Holdings Inc | 705,048 | $1.11M | 0.01% | +550,097+355.0% | Added |
| Nuveen, LLC | 623,876 | $979.5K | 0.00% | −250,636−28.7% | Reduced |
| Two Sigma Investments, LP | 512,741 | $805.0K | 0.00% | +89,637+21.2% | Added |
| Goldman Sachs Group Inc | 419,024 | $657.9K | 0.00% | −121,253−22.4% | Reduced |
| Morgan Stanley | 407,933 | $640.5K | 0.00% | +18,246+4.7% | Added |
| Millennium Management LLC | 523,918 | $629.7K | 0.00% | −149,477−22.2% | Reduced |
| D. E. Shaw & Co., Inc. | 380,254 | $597.0K | 0.00% | −2,898−0.8% | Reduced |
| Bank of New York Mellon Corp | 274,451 | $430.9K | 0.00% | +5,806+2.2% | Added |
| Renaissance Technologies LLC | 269,600 | $423.3K | 0.00% | +26,900+11.1% | Added |
| TLS Advisors LLC | 250,185 | $393.0K | 0.93% | +180,185+257.4% | Added |
| Citadel Advisors LLC | 228,684 | $359.0K | 0.00% | −56,450−19.8% | Reduced |
| Bridgeway Capital Management, LLC | 198,900 | $312.3K | 0.01% | 00.0% | Unchanged |
| Arbiter Partners Capital Management LLC | 192,585 | $302.4K | 0.21% | 00.0% | Unchanged |
| FMR LLC | 189,536 | $297.6K | 0.00% | −9,444−4.7% | Reduced |
| Alliancebernstein L.P. | 150,592 | $278.6K | 0.00% | 00.0% | Unchanged |
| Stonepine Capital Management, LLC | 164,045 | $257.6K | 0.23% | −536,955−76.6% | Reduced |
| Rhumbline Advisers | 159,235 | $250.0K | 0.00% | −3,538−2.2% | Reduced |
| Cornerstone Capital, Inc. | 142,286 | $223.4K | 0.02% | +33,075+30.3% | Added |
| Invesco Ltd. | 135,087 | $212.1K | 0.00% | −1,222−0.9% | Reduced |
| Bank of America Corp | 121,656 | $191.0K | 0.00% | +38,568+46.4% | Added |
| JPMorgan Chase & Co | 120,102 | $187.4K | 0.00% | −173,066−59.0% | Reduced |
| AQR Capital Management LLC | 115,647 | $181.6K | 0.00% | +91,494+378.8% | Added |
| UBS Group AG | 102,507 | $160.9K | 0.00% | +34,533+50.8% | Added |
| Deutsche Bank AG | 92,670 | $145.5K | 0.00% | +15,445+20.0% | Added |
| Price T Rowe Associates Inc | 77,040 | $122.0K | 0.00% | +23,850+44.8% | Added |
| SEI Investments Co | 60,578 | $95.1K | 0.00% | +17,718+41.3% | Added |
| Vanguard Global Advisers, LLC | 51,396 | $80.7K | 0.00% | +51,396 | New |
| Wells Fargo & Company | 50,133 | $78.7K | 0.00% | −75,503−60.1% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 50,113 | $78.7K | 0.00% | +1,270+2.6% | Added |
| Shay Capital LLC | 49,662 | $78.0K | 0.01% | +49,662 | New |
| MetLife Investment Management | 48,132 | $75.6K | 0.00% | +11,580+31.7% | Added |
| XTX Topco Ltd | 44,659 | $70.1K | 0.00% | +32,637+271.5% | Added |
| Blair William & Co | 43,216 | $67.8K | 0.00% | +50.0% | Added |
| Jacobs Levy Equity Management, Inc | 42,966 | $67.5K | 0.00% | −195,223−82.0% | Reduced |
| Susquehanna International Group, LLP | 41,629 | $65.4K | 0.00% | +25,671+160.9% | Added |
| LPL Financial LLC | 36,164 | $56.8K | 0.00% | +16,810+86.9% | Added |
| Tower Research Capital LLC (TRC) | 35,306 | $55.4K | 0.00% | +29,036+463.1% | Added |
| American Century Companies Inc | 34,816 | $54.7K | 0.00% | +34,816 | New |
| Woodstock Corp | 34,418 | $54.0K | 0.00% | −822−2.3% | Reduced |
| Nine Masts Capital Ltd | 29,062 | $45.6K | 0.01% | +29,062 | New |
| Manufacturers Life Insurance Company, The | 28,943 | $45.4K | 0.00% | 00.0% | Unchanged |
| Intech Investment Management LLC | 28,937 | $45.4K | 0.00% | −8,883−23.5% | Reduced |
| Barclays PLC | 28,760 | $45.2K | 0.00% | −136,797−82.6% | Reduced |
| Legato Capital Management LLC | 28,196 | $44.3K | 0.00% | −2,483−8.1% | Reduced |
| Jane Street Group, LLC | 27,551 | $43.3K | 0.00% | −107,827−79.6% | Reduced |
| BNP Paribas Arbitrage, SA | 27,339 | $42.9K | 0.00% | +1,469+5.7% | Added |
| China Universal Asset Management Co., Ltd. | 25,546 | $40.1K | 0.00% | +2,089+8.9% | Added |
| JustInvest LLC | 25,227 | $39.6K | 0.00% | −6,210−19.8% | Reduced |
| State of Wyoming | 24,694 | $38.8K | 0.00% | +12,451+101.7% | Added |
| Police & Firemen's Retirement System of New Jersey | 22,568 | $35.4K | 0.00% | 00.0% | Unchanged |
| ProShare Advisors LLC | 22,552 | $35.4K | 0.00% | −3,024−11.8% | Reduced |
| HighTower Advisors, LLC | 21,068 | $33.1K | 0.00% | −314−1.5% | Reduced |
| BFSG, LLC | 20,815 | $32.7K | 0.00% | +380+1.9% | Added |
| Prudential Financial Inc | 19,279 | $30.3K | 0.00% | +19,279 | New |
| Voya Investment Management LLC | 18,190 | $28.6K | 0.00% | −1,306−6.7% | Reduced |
| Thrive Wealth Management, LLC | 17,281 | $27.1K | 0.00% | 00.0% | Unchanged |
| Point72 Asset Management, L.P. | 16,238 | $25.5K | 0.00% | +16,238 | New |
| Connor, Clark & Lunn Investment Management Ltd. | 14,136 | $22.2K | 0.00% | −4,809−25.4% | Reduced |
| Victory Capital Management Inc | 13,488 | $21.2K | 0.00% | +936+7.5% | Added |
| RSM US Wealth Management LLC | 12,178 | $19.1K | 0.00% | +1,727+16.5% | Added |
| New York State Common Retirement Fund | 11,806 | $18.5K | 0.00% | 00.0% | Unchanged |
| Diversified Enterprises, LLC | 11,311 | $17.8K | 0.00% | +11,311 | New |
| Russell Investments Group, Ltd. | 10,800 | $17.0K | 0.00% | −139−1.3% | Reduced |
| Abel Hall, LLC | 10,704 | $16.8K | 0.00% | +10,704 | New |
| Integrated Wealth Concepts LLC | 10,651 | $16.7K | 0.00% | +10,651 | New |
| Mercer Global Advisors Inc | 10,048 | $15.8K | 0.00% | +10,048 | New |
| Squarepoint Ops LLC | 10,032 | $15.8K | 0.00% | −10,294−50.6% | Reduced |
| Citigroup Inc | 9,752 | $15.3K | 0.00% | +2,884+42.0% | Added |
| Ameritas Investment Partners, Inc. | 9,652 | $15.2K | 0.00% | 00.0% | Unchanged |
| Legal & General Group Plc | 9,292 | $14.6K | 0.00% | −265−2.8% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 7,829 | $12.3K | 0.00% | +834+11.9% | Added |
| Steigerwald, Gordon & Koch Inc. | 7,673 | $12.0K | 0.00% | 00.0% | Unchanged |
| CWM, LLC | 7,599 | $11.9K | 0.00% | +5,106+204.8% | Added |
| California State Teachers Retirement System | 6,243 | $9.80K | 0.00% | −233−3.6% | Reduced |
| Advisor Group Holdings, Inc. | 5,499 | $8.63K | 0.00% | −9,969−64.4% | Reduced |
| MAI Capital Management | 4,821 | $7.57K | 0.00% | −1,915−28.4% | Reduced |
| Sterling Capital Management LLC | 3,307 | $5.19K | 0.00% | −2,315−41.2% | Reduced |
| GF Fund Management Co. Ltd. | 3,201 | $5.03K | 0.00% | +373+13.2% | Added |
| Allworth Financial LP | 2,451 | $3.85K | 0.00% | +324+15.2% | Added |
| Jackson, Grant Investment Advisers, Inc. | 2,450 | $3.85K | 0.00% | 00.0% | Unchanged |
| Redwood Park Advisors LLC | 2,184 | $3.43K | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 1,751 | $3.00K | 0.00% | −3,051−63.5% | Reduced |
| Parallel Advisors, LLC | 1,854 | $2.91K | 0.00% | 00.0% | Unchanged |
| Larson Financial Group LLC | 1,444 | $2.27K | 0.00% | −26−1.8% | Reduced |