OmniAb, Inc. 13F holders
131 funds reported a position in OmniAb, Inc. in their 13F for the quarter ended 30 June 2026, together 59.2 million shares worth $145.1 million. Against the quarter before, 20 opened a position, 57 added, 32 trimmed and 17 sold out; together they bought a net 2.8 million shares. The largest holders: Whitefort Capital Management, LP, BlackRock, Inc. and Nomura Holdings Inc.
Funds holding131+3 on Q1 2026
Shares they held59.2Mworth $145.1 million
Net bought on the quarter2.8M sharesabout $7.0 million at the funds' values
Funds buying to selling77 to 49opened or added, to cut or sold
Opened 20Added 57Held 22Trimmed 32Sold out 17
What each fund did in OABI against its 13F for the quarter before; a change under 0.1% of a holding counts as held
Funds reporting a position in OABI in their 13F, each quarter; hover a bar for the shares they held
Filed so far for the quarter to 30 September 2026
3,241 funds have filed their 13F for the quarter so far; the rest are due by 16 November 2026. Of those, 25 reported a position in OmniAb, Inc.: 1 opened one, 6 added, 7 trimmed and 2 sold out, a net 17,366 shares bought.
| Fund | Change in shares | Shares now | Status | Filing |
|---|---|---|---|---|
| DekaBank Deutsche Girozentrale | +18,770 | 18,770 | new | 13F |
| China Universal Asset Management Co., Ltd. | +3,456 | 26,528 | added | 13F |
| Woodstock Corp. | -3,215 | 26,161 | trimmed | 13F |
| Choreo, LLC | -1,536 | 10,696 | trimmed | 13F |
| Isthmus Partners, LLC | -1,293 | 802,135 | trimmed | 13F |
| Mirae Asset Global Investments Co., Ltd. | +946 | 7,430 | added | 13F |
| Gamma Investing LLC | +488 | 616 | added | 13F |
| ProShare Advisors LLC | -304 | 18,851 | trimmed | 13F |
| GF Fund Management Co. Ltd | +264 | 3,237 | added | 13F |
| Sterling Capital Management LLC | -93 | 2,124 | trimmed | 13F |
| Farther Finance Advisors, LLC | -11 | 180 | trimmed | 13F |
| Nisa Investment Advisors, LLC | +11 | 531 | added | 13F |
| Caitong International Asset Management Co., Ltd | +10 | 15 | added | 13F |
| SJS Investment Consulting Inc. | -5 | 23 | trimmed | 13F |
| IFP Advisors, Inc | -87 | 0 | sold out | 13F |
| Wealth Enhancement Trust Services, Inc. | -35 | 0 | sold out | 13F |
The largest moves in the name among the funds that have filed, against each fund's previous 13F.
The well-known funds
Of the 44 funds followed here, 6 reported a position in OmniAb, Inc. in a 13F for the quarter ended 30 June 2026. The largest: Geode Capital Management, 2.9 million shares worth $7.1 million, 0.0% of its reported book. Sold out: Point72 Asset Management. In the quarter, 3 funds added or opened a position and 4 trimmed or sold out; together they bought a net 207,631 shares, about $510,772 at the funds' own value per share on 30 June 2026. A change under 0.1% of a holding counts as held.
| Fund | Shares | Value | Of its book | Change on the quarter | Status | Quarter ended | Filing |
|---|---|---|---|---|---|---|---|
| Geode Capital Management | 2,883,978 | $7.1 million | 0.0% | -41,601 | trimmed | 30 June 2026 | 13F |
| Two Sigma Investments | 657,432 | $1.6 million | 0.0% | +144,691 | added | 30 June 2026 | 13F |
| Renaissance Technologies | 600,350 | $1.5 million | 0.0% | +330,750 | added | 30 June 2026 | 13F |
| Millennium Management | 474,159 | $864,306 | 0.0% | -49,759 | trimmed | 30 June 2026 | 13F |
| FMR LLC | 199,818 | $491,552 | 0.0% | +10,282 | added | 30 June 2026 | 13F |
| Citadel Advisors | 58,190 | $143,147 | 0.0% | -170,494 | trimmed | 30 June 2026 | 13F |
| Point72 Asset Management | 0 | $0 | 0.0% | -16,238 | exited | 30 June 2026 | 13F |
Value is what the fund reported.
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Change is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.The largest holders
| Fund | Shares | Share of all | Value | Of its book | Change in shares | Filing |
|---|---|---|---|---|---|---|
| Whitefort Capital Management, LP | 10,248,658 | 17.32% | $25.2 million | 6.44% | -3,975,000 | 13F |
| BlackRock, Inc. | 8,897,490 | 15.04% | $21.9 million | 0.00% | +790,609 | 13F |
| Nomura Holdings Inc. | 5,028,160 | 8.50% | $12.4 million | 0.05% | +4,323,112 | 13F |
| Cadian Capital Management, LP | 4,211,821 | 7.12% | $10.4 million | 0.78% | +54,692 | 13F |
| Vanguard Capital Management LLC | 3,852,356 | 6.51% | $9.5 million | 0.00% | -141,296 | 13F |
| Geode Capital Management, LLC | 2,883,978 | 4.87% | $7.1 million | 0.00% | -41,601 | 13F |
| Rice Hall James & Associates, LLC | 2,610,434 | 4.41% | $6.4 million | 0.31% | +63,179 | 13F |
| Private Management Group Inc. | 2,344,770 | 3.96% | $5.8 million | 0.15% | -84,396 | 13F |
| State Street Corp. | 2,133,549 | 3.61% | $5.2 million | 0.00% | +66,406 | 13F |
| Dimensional Fund Advisors LP | 1,262,099 | 2.13% | $3.1 million | 0.00% | -483,149 | 13F |
| Towerview LLC | 1,180,000 | 1.99% | $2.9 million | 1.90% | +180,000 | 13F |
| Vanguard Portfolio Management LLC | 980,416 | 1.66% | $2.4 million | 0.00% | +76,617 | 13F |
| Charles Schwab Investment Management Inc. | 966,877 | 1.63% | $2.4 million | 0.00% | +7,304 | 13F |
| Northern Trust Corp. | 948,294 | 1.60% | $2.3 million | 0.00% | +67,399 | 13F |
| ADAR1 Capital Management, LLC | 947,412 | 1.60% | $2.3 million | 0.11% | +242,222 | 13F |
| Isthmus Partners, LLC | 803,428 | 1.36% | $2.0 million | 0.19% | +46,754 | 13F |
| Vanguard Fiduciary Trust Co. | 758,460 | 1.28% | $1.9 million | 0.00% | +32,852 | 13F |
| Two Sigma Investments, LP | 657,432 | 1.11% | $1.6 million | 0.00% | +144,691 | 13F |
| Nuveen, LLC | 642,811 | 1.09% | $1.6 million | 0.00% | +18,935 | 13F |
| Renaissance Technologies LLC | 600,350 | 1.01% | $1.5 million | 0.00% | +330,750 | 13F |
| Arbiter Partners Capital Management LLC | 577,755 | 0.98% | $1.4 million | 0.26% | 13F | |
| D. E. Shaw & Co., Inc. | 559,404 | 0.95% | $1.4 million | 0.00% | +179,150 | 13F |
| Mackenzie Financial Corp. | 489,134 | 0.83% | $1.2 million | 0.00% | new | 13F |
| Goldman Sachs Group Inc. | 384,573 | 0.65% | $946,049 | 0.00% | -34,451 | 13F |
| Morgan Stanley | 371,506 | 0.63% | $913,905 | 0.00% | -36,427 | 13F |
| Millennium Management LLC | 474,159 | 0.80% | $864,306 | 0.00% | -49,759 | 13F |
| Bank of New York Mellon Corp | 318,406 | 0.54% | $783,279 | 0.00% | +43,955 | 13F |
| TLS Advisors LLC | 220,685 | 0.37% | $542,885 | 1.60% | -29,500 | 13F |
| FMR LLC | 199,818 | 0.34% | $491,552 | 0.00% | +10,282 | 13F |
| Bridgeway Capital Management, LLC | 198,900 | 0.34% | $489,294 | 0.01% | no change | 13F |
| Rhumbline Advisers | 171,957 | 0.29% | $423,003 | 0.00% | +12,722 | 13F |
| Palumbo Wealth Management LLC | 161,975 | 0.27% | $398,459 | 0.08% | new | 13F |
| Invesco Ltd. | 161,376 | 0.27% | $396,986 | 0.00% | +26,289 | 13F |
| Arrowstreet Capital, Limited Partnership | 159,621 | 0.27% | $392,668 | 0.00% | new | 13F |
| AQR Capital Management LLC | 157,716 | 0.27% | $387,981 | 0.00% | +42,069 | 13F |
| Bank of America Corp. | 149,493 | 0.25% | $367,753 | 0.00% | +27,837 | 13F |
| Walleye Capital LLC | 144,427 | 0.24% | $355,290 | 0.00% | new | 13F |
| Cornerstone Capital, Inc. | 142,286 | 0.24% | $350,024 | 0.03% | no change | 13F |
| Acadian Asset Management LLC | 132,385 | 0.22% | $323,000 | 0.00% | new | 13F |
| JPMorgan Chase & Co. | 107,049 | 0.18% | $275,115 | 0.00% | -13,053 | 13F |
| Deutsche Bank AG | 100,842 | 0.17% | $248,071 | 0.00% | +8,172 | 13F |
| Wells Fargo & Company | 100,229 | 0.17% | $246,563 | 0.00% | +50,096 | 13F |
| AllianceBernstein L.P. | 155,992 | 0.26% | $244,907 | 0.00% | +5,400 | 13F |
| Price T Rowe Associates Inc. | 80,106 | 0.14% | $198,000 | 0.00% | +3,066 | 13F |
| American Century Companies Inc. | 75,083 | 0.13% | $184,704 | 0.00% | +40,267 | 13F |
| XTX Topco Ltd | 73,907 | 0.12% | $181,811 | 0.00% | +29,248 | 13F |
| Connor, Clark & Lunn Investment Management Ltd. | 72,357 | 0.12% | $177,999 | 0.00% | +58,221 | 13F |
| MetLife Investment Management, LLC | 65,744 | 0.11% | $161,730 | 0.00% | +17,612 | 13F |
| Russell Investments Group, Ltd. | 63,783 | 0.11% | $156,906 | 0.00% | +52,983 | 13F |
| Citadel Advisors LLC | 58,190 | 0.10% | $143,147 | 0.00% | -170,494 | 13F |
The 50 largest of the 131 funds that reported a position in OABI in their 13F for the quarter ended 30 June 2026, by the value each reported.
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Share of all is the fund's part of all the shares the funds reported. Change is shares against the fund's 13F for the quarter before. A 13F lists a manager's long positions in US-listed shares at the quarter's end. What is a 13F?Options the funds reported on OABI
| Fund | Option | Shares under the options | Value of those shares | Quarter ended | Filing |
|---|---|---|---|---|---|
| Citadel Advisors | Calls | 33,700 | $82,902 | 30 June 2026 | 13F |
A 13F lists calls and puts by the shares they cover and what those shares were worth at the quarter's end, not what the options cost.
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They are not counted in the holdings above. A put gains when the stock falls, a call when it rises, and a fund may hold either to hedge.Schedule 13D and 13G filed on the name, last twelve months
| Filed | Schedule | Who | Holding | Of the class | Event date | Rule or purpose | Filing |
|---|---|---|---|---|---|---|---|
| 14 August 2026 | 13G/A | Whitefort Capital Management, LP and 5 others | 10.2 million | 7.1% | 30 June 2026 | passive, under 20% (13d-1(c)) | EDGAR |
| 10 February 2026 | 13G/A | Ash X LP and 15 others | 12.3 million | 8.5% | 31 December 2025 | passive, institutional (13d-1(b)) | EDGAR |
| 14 November 2025 | 13G/A | Whitefort Capital Management, LP and 5 others | 14.2 million | 9.9% | 30 September 2025 | passive, under 20% (13d-1(c)) | EDGAR |
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder.
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Amendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short. 13D and 13GFails to deliver
| Settlement date | Shares failed | Price | File |
|---|---|---|---|
| 30 September 2026 | 385 | $4.74 | SEC |
| 29 September 2026 | 385 | $4.74 | SEC |
| 28 September 2026 | 385 | $4.61 | SEC |
| 25 September 2026 | 385 | $4.79 | SEC |
| 24 September 2026 | 385 | $4.79 | SEC |
| 23 September 2026 | 1,064 | $4.92 | SEC |
| 22 September 2026 | 385 | $4.58 | SEC |
| 21 September 2026 | 385 | $4.47 | SEC |
| 18 September 2026 | 385 | $4.44 | SEC |
| 17 September 2026 | 385 | $4.35 | SEC |
| 16 September 2026 | 385 | $4.35 | SEC |
| 15 September 2026 | 7,685 | $4.48 | SEC |
| 14 September 2026 | 385 | $4.07 | SEC |
| 11 September 2026 | 385 | $3.95 | SEC |
| 10 September 2026 | 385 | $4.02 | SEC |
| 9 September 2026 | 385 | $4.24 | SEC |
| 8 September 2026 | 385 | $4.33 | SEC |
| 4 September 2026 | 385 | $4.75 | SEC |
| 3 September 2026 | 385 | $5.04 | SEC |
| 2 September 2026 | 385 | $4.44 | SEC |
| 1 September 2026 | 385 | $4.38 | SEC |
| 31 August 2026 | 385 | $4.47 | SEC |
| 28 August 2026 | 385 | $4.61 | SEC |
| 27 August 2026 | 385 | $4.81 | SEC |
| 26 August 2026 | 385 | $4.66 | SEC |
| 25 August 2026 | 385 | $4.71 | SEC |
| 24 August 2026 | 385 | $4.33 | SEC |
| 21 August 2026 | 8,215 | $4.30 | SEC |
| 20 August 2026 | 25,360 | $4.19 | SEC |
| 19 August 2026 | 384 | $3.92 | SEC |
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period.