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 $145.1M in total; no superinvestor holds it.
Other share classesOABIW
13F holders, Q2 2026
Institutional positions in OmniAb, Inc. as of Jun 30, 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
- 131
- +4 vs. Q1 2026
- Shares held
- 59.2M
- +3.23M (+5.8%) vs. Q1 2026
- Total value
- $145.1M
- +$57.5M (+65.5%) vs. Q1 2026
- New holders
- 21
- 58 more added
- Sold out
- 17
- 32 more reduced
1 institution that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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 | $145.1M |
| Q1 2026 | 128 | $87.7M |
| Q4 2025 | 129 | $105.8M |
| Q3 2025 | 140 | $101.8M |
| Q2 2025 | 144 | $96.1M |
| Q1 2025 | 153 | $152.4M |
| Q4 2024 | 165 | $224.7M |
| Q3 2024 | 165 | $335.2M |
| Q2 2024 | 160 | $294.5M |
| Q1 2024 | 153 | $455.3M |
| Q4 2023 | 157 | $518.2M |
| Q3 2023 | 148 | $355.9M |
| Q2 2023 | 144 | $338.9M |
| Q1 2023 | 142 | $261.3M |
| Q4 2022 | 148 | $235.7M |
| 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, Q2 2026
Shares, value and share of portfolio for each institution holding OmniAb, Inc.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Whitefort Capital Management, LP | 10,248,658 | $25.2M | 6.21% | −3,975,000−27.9% | Reduced |
| BlackRock, Inc. | 8,897,490 | $21.9M | 0.00% | +790,609+9.8% | Added |
| Nomura Holdings Inc | 5,028,160 | $12.4M | 0.05% | +4,323,112+613.2% | Added |
| Cadian Capital Management, LP | 4,211,821 | $10.4M | 0.78% | +54,692+1.3% | Added |
| Vanguard Capital Management LLC | 3,852,356 | $9.48M | 0.00% | −141,296−3.5% | Reduced |
| Geode Capital Management, LLC | 2,883,978 | $7.10M | 0.00% | −41,601−1.4% | Reduced |
| Rice Hall James & Associates, LLC | 2,610,434 | $6.42M | 0.31% | +63,179+2.5% | Added |
| Private Management Group Inc | 2,344,770 | $5.77M | 0.15% | −84,396−3.5% | Reduced |
| State Street Corp | 2,133,549 | $5.25M | 0.00% | +66,406+3.2% | Added |
| Dimensional Fund Advisors LP | 1,262,099 | $3.11M | 0.00% | −483,149−27.7% | Reduced |
| Towerview LLC | 1,180,000 | $2.90M | 1.90% | +180,000+18.0% | Added |
| Vanguard Portfolio Management LLC | 980,416 | $2.41M | 0.00% | +76,617+8.5% | Added |
| Charles Schwab Investment Management Inc | 966,877 | $2.38M | 0.00% | +7,304+0.8% | Added |
| Northern Trust Corp | 948,294 | $2.33M | 0.00% | +67,399+7.7% | Added |
| ADAR1 Capital Management, LLC | 947,412 | $2.33M | 0.11% | +242,222+34.3% | Added |
| Isthmus Partners, LLC | 803,428 | $1.98M | 0.19% | +46,754+6.2% | Added |
| Vanguard Fiduciary Trust Co | 758,460 | $1.87M | 0.00% | +32,852+4.5% | Added |
| Two Sigma Investments, LP | 657,432 | $1.62M | 0.00% | +144,691+28.2% | Added |
| Nuveen, LLC | 642,811 | $1.58M | 0.00% | +18,935+3.0% | Added |
| Renaissance Technologies LLC | 600,350 | $1.48M | 0.00% | +330,750+122.7% | Added |
| Arbiter Partners Capital Management LLC | 577,755 | $1.42M | 0.26% | +385,170+200.0% | Added |
| D. E. Shaw & Co., Inc. | 559,404 | $1.38M | 0.00% | +179,150+47.1% | Added |
| Mackenzie Financial Corp | 489,134 | $1.20M | 0.00% | +489,134 | New |
| Goldman Sachs Group Inc | 384,573 | $946.0K | 0.00% | −34,451−8.2% | Reduced |
| Morgan Stanley | 371,506 | $913.9K | 0.00% | −36,427−8.9% | Reduced |
| Millennium Management LLC | 474,159 | $864.3K | 0.00% | −49,759−9.5% | Reduced |
| Bank of New York Mellon Corp | 318,406 | $783.3K | 0.00% | +43,955+16.0% | Added |
| TLS Advisors LLC | 220,685 | $542.9K | 1.60% | −29,500−11.8% | Reduced |
| FMR LLC | 199,818 | $491.6K | 0.00% | +10,282+5.4% | Added |
| Bridgeway Capital Management, LLC | 198,900 | $489.3K | 0.01% | 00.0% | Unchanged |
| Rhumbline Advisers | 171,957 | $423.0K | 0.00% | +12,722+8.0% | Added |
| Palumbo Wealth Management LLC | 161,975 | $398.5K | 0.08% | +161,975 | New |
| Invesco Ltd. | 161,376 | $397.0K | 0.00% | +26,289+19.5% | Added |
| Arrowstreet Capital, Limited Partnership | 159,621 | $392.7K | 0.00% | +159,621 | New |
| AQR Capital Management LLC | 157,716 | $388.0K | 0.00% | +42,069+36.4% | Added |
| Bank of America Corp | 149,493 | $367.8K | 0.00% | +27,837+22.9% | Added |
| Walleye Capital LLC | 144,427 | $355.3K | 0.00% | +144,427 | New |
| Cornerstone Capital, Inc. | 142,286 | $350.0K | 0.03% | 00.0% | Unchanged |
| Acadian Asset Management LLC | 132,385 | $323.0K | 0.00% | +132,385 | New |
| JPMorgan Chase & Co | 107,049 | $275.1K | 0.00% | −13,053−10.9% | Reduced |
| Deutsche Bank AG | 100,842 | $248.1K | 0.00% | +8,172+8.8% | Added |
| Wells Fargo & Company | 100,229 | $246.6K | 0.00% | +50,096+99.9% | Added |
| Alliancebernstein L.P. | 155,992 | $244.9K | 0.00% | +5,400+3.6% | Added |
| Price T Rowe Associates Inc | 80,106 | $198.0K | 0.00% | +3,066+4.0% | Added |
| American Century Companies Inc | 75,083 | $184.7K | 0.00% | +40,267+115.7% | Added |
| XTX Topco Ltd | 73,907 | $181.8K | 0.00% | +29,248+65.5% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 72,357 | $178.0K | 0.00% | +58,221+411.9% | Added |
| MetLife Investment Management | 65,744 | $161.7K | 0.00% | +17,612+36.6% | Added |
| Russell Investments Group, Ltd. | 63,783 | $156.9K | 0.00% | +52,983+490.6% | Added |
| Citadel Advisors LLC | 58,190 | $143.1K | 0.00% | −170,494−74.6% | Reduced |
| Thrivent Financial for Lutherans | 55,342 | $136.0K | 0.00% | +55,342 | New |
| Citigroup Inc | 54,667 | $134.5K | 0.00% | +44,915+460.6% | Added |
| SEI Investments Co | 53,390 | $131.3K | 0.00% | −7,188−11.9% | Reduced |
| Shay Capital LLC | 51,500 | $126.7K | 0.01% | +1,838+3.7% | Added |
| Vanguard Global Advisers, LLC | 51,396 | $126.4K | 0.00% | 00.0% | Unchanged |
| Mirae Asset Global ETFs Holdings Ltd. | 50,644 | $124.6K | 0.00% | +531+1.1% | Added |
| Blair William & Co | 43,394 | $106.7K | 0.00% | +178+0.4% | Added |
| Police & Firemen's Retirement System of New Jersey | 42,217 | $103.9K | 0.00% | +19,649+87.1% | Added |
| Prudential Financial Inc | 38,969 | $95.9K | 0.00% | +19,690+102.1% | Added |
| Susquehanna International Group, LLP | 35,691 | $87.8K | 0.00% | −5,938−14.3% | Reduced |
| Squarepoint Ops LLC | 35,357 | $87.0K | 0.00% | +25,325+252.4% | Added |
| LPL Financial LLC | 34,821 | $85.7K | 0.00% | −1,343−3.7% | Reduced |
| Woodstock Corp | 29,376 | $72.3K | 0.01% | −5,042−14.6% | Reduced |
| Intech Investment Management LLC | 27,824 | $68.4K | 0.00% | −1,113−3.8% | Reduced |
| Barclays PLC | 26,469 | $65.1K | 0.00% | −2,291−8.0% | Reduced |
| Manufacturers Life Insurance Company, The | 24,785 | $61.0K | 0.00% | −4,158−14.4% | Reduced |
| Voya Investment Management LLC | 23,613 | $58.1K | 0.00% | +5,423+29.8% | Added |
| China Universal Asset Management Co., Ltd. | 23,072 | $56.8K | 0.00% | −2,474−9.7% | Reduced |
| HighTower Advisors, LLC | 21,609 | $53.2K | 0.00% | +541+2.6% | Added |
| BFSG, LLC | 20,815 | $51.2K | 0.00% | 00.0% | Unchanged |
| Qube Research & Technologies Ltd | 20,186 | $49.7K | 0.00% | +20,186 | New |
| BNP Paribas Arbitrage, SA | 19,822 | $48.8K | 0.00% | −7,517−27.5% | Reduced |
| Quadrature Capital Ltd | 19,492 | $48.0K | 0.00% | +19,492 | New |
| ProShare Advisors LLC | 19,155 | $47.1K | 0.00% | −3,397−15.1% | Reduced |
| Thrive Wealth Management, LLC | 18,046 | $44.4K | 0.01% | +765+4.4% | Added |
| UBS Group AG | 17,849 | $43.9K | 0.00% | −84,658−82.6% | Reduced |
| Two Sigma Securities, LLC | 15,726 | $38.7K | 0.00% | +15,726 | New |
| Advisor Group Holdings, Inc. | 15,459 | $38.0K | 0.00% | +9,960+181.1% | Added |
| Canada Pension Plan Investment Board | 15,100 | $37.1K | 0.00% | +15,100 | New |
| Victory Capital Management Inc | 13,649 | $33.6K | 0.00% | +161+1.2% | Added |
| Mercer Global Advisors Inc | 12,357 | $30.4K | 0.00% | +2,309+23.0% | Added |
| RSM US Wealth Management LLC | 12,232 | $30.1K | 0.00% | +54+0.4% | Added |
| New York State Common Retirement Fund | 11,806 | $29.0K | 0.00% | 00.0% | Unchanged |
| Legal & General Group Plc | 11,284 | $27.8K | 0.00% | +1,992+21.4% | Added |
| Legato Capital Management LLC | 10,913 | $26.8K | 0.00% | −17,283−61.3% | Reduced |
| JustInvest LLC | 10,793 | $26.6K | 0.00% | −14,434−57.2% | Reduced |
| Virtu Financial LLC | 10,565 | $26.0K | 0.00% | +10,565 | New |
| Xponance, Inc. | 10,472 | $25.8K | 0.00% | +10,472 | New |
| Ameritas Investment Partners, Inc. | 9,652 | $23.7K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 8,044 | $19.8K | 0.00% | −27,262−77.2% | Reduced |
| Clear Street Markets LLC | 7,882 | $19.4K | 0.00% | +7,882 | New |
| Steigerwald, Gordon & Koch Inc. | 7,673 | $18.9K | 0.00% | 00.0% | Unchanged |
| Mirae Asset Global Investments Co., Ltd. | 6,484 | $16.0K | 0.00% | −1,345−17.2% | Reduced |
| Royal Bank of Canada | 5,219 | $13.0K | 0.00% | +3,468+198.1% | Added |
| GF Fund Management Co. Ltd. | 2,973 | $7.31K | 0.00% | −228−7.1% | Reduced |
| Allworth Financial LP | 2,771 | $6.82K | 0.00% | +320+13.1% | Added |
| Jackson, Grant Investment Advisers, Inc. | 2,450 | $6.03K | 0.00% | 00.0% | Unchanged |
| Sterling Capital Management LLC | 2,217 | $5.45K | 0.00% | −1,090−33.0% | Reduced |
| Redwood Park Advisors LLC | 2,184 | $5.37K | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 2,059 | $5.07K | 0.00% | +2,035+8,479.2% | Added |