OABI Institutional Ownership & Shareholders
OMNIAB INC (OABI) is currently held by 133 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $147.62M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Whitefort Capital Management, Lp is currently the largest disclosed institutional shareholder of OABI tracked by InsiderSet, reporting ownership valued at approximately $25.21M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $52.17M, representing an estimated gain of +106.91% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 73% of the total disclosed OABI value among the investors covered in this analysis. Major shareholders include Whitefort Capital Management, Lp, Blackrock, Inc., Nomura Holdings Inc, and several other long-term asset managers with concentrated positions in OMNIAB INC (OABI).
This page ranks the largest institutional OABI shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
133
Total Reported Value
$147.62M
Largest Holder
Whitefort Capital Management, Lp
Largest Position
$25.21M
Insider Transactions (90d)
1
Latest Filing Quarter
Q2 2026
New Institutional Positions
117
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Whitefort Capital Management, Lp | 6.21% | 10,248,658 | $25,211,699 | $52,165,669 | +$26,953,970 | +106.91% | |
| Blackrock, Inc. | 0.00% | 8,897,490 | $21,887,827 | $45,288,224 | +$23,400,397 | +106.91% | |
| Nomura Holdings Inc | 0.05% | 5,028,160 | $12,369,274 | $25,593,334 | +$13,224,060 | +106.91% | |
| Cadian Capital Management, Lp | 0.78% | 4,211,821 | $10,361,080 | $21,438,169 | +$11,077,089 | +106.91% | |
| Vanguard Capital Management Llc | 0.00% | 3,852,356 | $9,476,796 | $19,608,492 | +$10,131,696 | +106.91% | |
| Geode Capital Management, Llc | 0.00% | 2,883,978 | $7,096,381 | $14,679,448 | +$7,583,067 | +106.86% | |
| Rice Hall James & Associates, Llc | 0.31% | 2,610,434 | $6,421,668 | $13,287,109 | +$6,865,441 | +106.91% | |
| Private Management Group Inc | 0.15% | 2,344,770 | $5,768,134 | $11,934,879 | +$6,166,745 | +106.91% | |
| State Street Corp | 0.00% | 2,133,549 | $5,248,531 | $10,859,764 | +$5,611,233 | +106.91% | |
| Isthmus Partners, Llc | 0.38% | 802,135 | $3,978,590 | $4,082,867 | +$104,277 | +2.62% | |
| Dimensional Fund Advisors Lp | 0.00% | 1,262,099 | $3,105,584 | $6,424,084 | +$3,318,500 | +106.86% | |
| Towerview Llc | 1.90% | 1,180,000 | $2,902,800 | $6,006,200 | +$3,103,400 | +106.91% | |
| Vanguard Portfolio Management Llc | 0.00% | 980,416 | $2,411,823 | $4,990,317 | +$2,578,494 | +106.91% | |
| Charles Schwab Investment Management Inc | 0.00% | 966,877 | $2,378,517 | $4,921,404 | +$2,542,887 | +106.91% | |
| Northern Trust Corp | 0.00% | 948,294 | $2,332,803 | $4,826,816 | +$2,494,013 | +106.91% | |
| Adar1 Capital Management, Llc | 0.11% | 947,412 | $2,330,634 | $4,822,327 | +$2,491,693 | +106.91% | |
| Mackenzie Financial Corp | 0.00% | 439,053 | $2,177,703 | $2,234,780 | +$57,077 | +2.62% | |
| Vanguard Fiduciary Trust Co | 0.00% | 758,460 | $1,865,812 | $3,860,561 | +$1,994,749 | +106.91% | |
| Two Sigma Investments, Lp | 0.00% | 657,432 | $1,617,283 | $3,346,329 | +$1,729,046 | +106.91% | |
| Nuveen, Llc | 0.00% | 642,811 | $1,581,315 | $3,271,908 | +$1,690,593 | +106.91% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 600,350 | $1,476,861 | $3,055,782 | +$1,578,921 | +106.91% |
| D. E. Shaw & Co., Inc. | 0.00% | 559,404 | $1,376,134 | $2,847,366 | +$1,471,232 | +106.91% | |
| Goldman Sachs Group Inc | 0.00% | 384,573 | $946,049 | $1,957,477 | +$1,011,428 | +106.91% | |
| Morgan Stanley | 0.00% | 371,506 | $913,905 | $1,890,966 | +$977,061 | +106.91% | |
| Millennium Management Llc | 0.00% | 474,159 | $864,306 | $2,413,469 | +$1,549,163 | +179.24% | |
| Bank Of New York Mellon Corp | 0.00% | 318,406 | $783,279 | $1,620,687 | +$837,408 | +106.91% | |
| Tls Advisors Llc | 1.60% | 220,685 | $542,885 | $1,123,287 | +$580,402 | +106.91% | |
| Fmr Llc | 0.00% | 199,818 | $491,552 | $1,017,074 | +$525,522 | +106.91% | |
| Bridgeway Capital Management, Llc | 0.01% | 198,900 | $489,294 | $1,012,401 | +$523,107 | +106.91% | |
| Arbiter Partners Capital Management | Paul Isaac | 0.25% | 192,585 | $473,759 | $980,258 | +$506,499 | +106.91% |
| Rhumbline Advisers | 0.00% | 171,957 | $423,003 | $875,261 | +$452,258 | +106.92% | |
| Palumbo Wealth Management Llc | 0.08% | 161,975 | $398,459 | $824,453 | +$425,994 | +106.91% | |
| Invesco Ltd. | 0.00% | 161,376 | $396,986 | $821,404 | +$424,418 | +106.91% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 159,621 | $392,668 | $812,471 | +$419,803 | +106.91% | |
| Aqr Capital Management Llc | 0.00% | 157,716 | $387,981 | $802,774 | +$414,793 | +106.91% | |
| Bank Of America Corp | 0.00% | 149,493 | $367,753 | $760,919 | +$393,166 | +106.91% | |
| Walleye Capital Llc | 0.00% | 144,427 | $355,290 | $735,133 | +$379,843 | +106.91% | |
| Cornerstone Capital, Inc. | 0.03% | 142,286 | $350,024 | $724,236 | +$374,212 | +106.91% | |
| Acadian Asset Management Llc | 0.00% | 132,385 | $323,000 | $673,840 | +$350,840 | +108.62% | |
| Jpmorgan Chase & Co | 0.00% | 107,049 | $275,115 | $544,879 | +$269,764 | +98.06% | |
| Deutsche Bank Ag\ | 0.00% | 100,842 | $248,071 | $513,286 | +$265,215 | +106.91% | |
| Wells Fargo & Company/Mn | 0.00% | 100,229 | $246,563 | $510,166 | +$263,603 | +106.91% | |
| Alliancebernstein L.P. | 0.00% | 155,992 | $244,907 | $793,999 | +$549,092 | +224.20% | |
| Price T Rowe Associates Inc | 0.00% | 80,106 | $198,000 | $407,740 | +$209,740 | +105.93% | |
| American Century Companies Inc | 0.00% | 75,083 | $184,704 | $382,172 | +$197,468 | +106.91% | |
| Xtx Topco Ltd | 0.00% | 73,907 | $181,811 | $376,187 | +$194,376 | +106.91% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | 72,357 | $177,999 | $368,297 | +$190,298 | +106.91% | |
| Metlife Investment Management, Llc | 0.00% | 65,744 | $161,730 | $334,637 | +$172,907 | +106.91% | |
| Russell Investments Group, Ltd. | 0.00% | 63,783 | $156,906 | $324,655 | +$167,749 | +106.91% | |
| Citadel Advisors Llc | 0.00% | 58,190 | $143,147 | $296,187 | +$153,040 | +106.91% |
Frequently asked questions about OABI
Who are the largest institutional holders of OABI?
The largest institutional holders of OABI reported in the latest SEC Form 13F filings include Whitefort Capital Management, Lp, Blackrock, Inc., Nomura Holdings Inc, Cadian Capital Management, Lp, and Vanguard Capital Management Llc. InsiderSet ranks institutional holders by their latest reported OABI position.
What is OABI institutional ownership?
This page tracks OABI positions reported by institutional investment managers through SEC Form 13F. OMNIAB INC (OABI) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own OABI?
InsiderSet currently tracks 133 institutional managers reporting OABI holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of OABI shareholders.
How much OABI stock do institutions own?
Institutional investment managers disclosed approximately $147.62M in OABI holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was OABI institutional ownership last updated?
The latest OABI institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional OABI holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its OABI position after the reporting date.
Are institutions buying or selling OABI?
Institutional buying and selling can be analyzed by comparing OABI positions across consecutive 13F reporting periods. InsiderSet's OABI Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View OABI ownership changes.
How has OABI institutional ownership changed over time?
InsiderSet tracks OABI institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.