OmniAb, Inc. - OABIW

Detailed investor-level table based on 13F positions.

Shareholders (13F)

Quarter: Q1 2026 · Compare: Q4 2025
13D/13G major owners: Ownership tab.
Methodology: Market value and % of portfolio use SEC reported VALUE ($000). For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received. Details.
Rows: 0
Investor History Status Shares held Market value ($000) % of portfolio Previous % Rank Change in shares % change in shares Source Date reported
Whitefort Capital Management, LP History No change 14,223,658 22,331 6.59% 6.73% 1 0 0.0% Q1 2026 May 15, 2026
BlackRock, Inc. History Added to 8,106,881 12,727 0.0% 0.0% 2 +41,900 0.52% Q1 2026 May 13, 2026
VANGUARD GROUP INC History No change 5,625,197 10,406 0.0% 0.0% 3 0 0.0% Q4 2025 Jan 29, 2026
CADIAN CAPITAL MANAGEMENT, LP History Reduced 4,157,129 6,526 0.79% 0.59% 4 -277,825 -6.26% Q1 2026 May 15, 2026
VANGUARD CAPITAL MANAGEMENT LLC History New 3,993,652 6,270 0.0% 5 +3,993,652 New Q1 2026 May 15, 2026
GEODE CAPITAL MANAGEMENT, LLC History Added to 2,925,579 4,594 0.0% 0.0% 6 +202,887 7.45% Q1 2026 May 15, 2026
RICE HALL JAMES & ASSOCIATES, LLC History Added to 2,547,255 3,999 0.22% 0.24% 7 +146,167 6.09% Q1 2026 May 15, 2026
PRIVATE MANAGEMENT GROUP INC History Added to 2,429,166 3,813 0.11% 0.13% 8 +8,688 0.36% Q1 2026 May 08, 2026
STATE STREET CORP History Added to 2,067,143 3,245 0.0% 0.0% 9 +18,147 0.89% Q1 2026 May 15, 2026
DIMENSIONAL FUND ADVISORS LP History Reduced 1,745,248 2,739 0.0% 0.0% 10 -407,345 -18.92% Q1 2026 May 07, 2026
TOWERVIEW LLC History No change 1,000,000 1,570 1.01% 1.34% 11 0 0.0% Q1 2026 May 05, 2026
CHARLES SCHWAB INVESTMENT MANAGEMENT INC History Reduced 959,573 1,506 0.0% 0.0% 12 -6,453 -0.67% Q1 2026 May 15, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC History New 903,799 1,418 0.0% 13 +903,799 New Q1 2026 May 08, 2026
NORTHERN TRUST CORP History Added to 880,895 1,383 0.0% 0.0% 14 +51,874 6.26% Q1 2026 May 14, 2026
ISTHMUS PARTNERS, LLC History Added to 756,674 1,187 0.12% 0.15% 15 +35,365 4.9% Q1 2026 Apr 29, 2026
VANGUARD FIDUCIARY TRUST CO History New 725,608 1,139 0.0% 16 +725,608 New Q1 2026 May 08, 2026
ADAR1 Capital Management, LLC History Added to 705,190 1,107 0.07% 0.1% 17 +3,000 0.43% Q1 2026 May 15, 2026
NOMURA HOLDINGS INC History Added to 705,048 1,106 0.0% 0.0% 18 +550,097 355.01% Q1 2026 May 15, 2026
Nuveen, LLC History Reduced 623,876 979 0.0% 0.0% 19 -250,636 -28.66% Q1 2026 Apr 30, 2026
TWO SIGMA INVESTMENTS, LP History Added to 512,741 805 0.0% 0.0% 20 +89,637 21.19% Q1 2026 May 15, 2026
GOLDMAN SACHS GROUP INC History Reduced 419,024 657 0.0% 0.0% 21 -121,253 -22.44% Q1 2026 May 15, 2026
MORGAN STANLEY History Added to 407,933 640 0.0% 0.0% 22 +18,246 4.68% Q1 2026 May 15, 2026
MILLENNIUM MANAGEMENT LLC History Reduced 523,918 629 0.0% 0.0% 23 -149,477 -22.2% Q1 2026 May 15, 2026
D. E. Shaw & Co., Inc. History Reduced 380,254 596 0.0% 0.0% 24 -2,898 -0.76% Q1 2026 May 15, 2026
Bank of New York Mellon Corp History Added to 274,451 430 0.0% 0.0% 25 +5,806 2.16% Q1 2026 May 05, 2026
RENAISSANCE TECHNOLOGIES LLC History Added to 269,600 423 0.0% 0.0% 26 +26,900 11.08% Q1 2026 May 14, 2026
TLS Advisors LLC History Added to 250,185 393 0.93% 0.36% 27 +180,185 257.41% Q1 2026 May 13, 2026
CITADEL ADVISORS LLC History Reduced 241,284 378 0.0% 0.0% 28 -69,850 -22.45% Q1 2026 May 15, 2026
TWO SIGMA ADVISERS, LP History No change 197,530 365 0.0% 0.0% 29 0 0.0% Q4 2025 Feb 17, 2026
BRIDGEWAY CAPITAL MANAGEMENT, LLC History No change 198,900 312 0.01% 0.01% 30 0 0.0% Q1 2026 May 15, 2026
Arbiter Partners Capital Management LLC History No change 192,585 302 0.17% 0.17% 31 0 0.0% Q1 2026 May 12, 2026
FMR LLC History Reduced 189,536 297 0.0% 0.0% 32 -9,444 -4.75% Q1 2026 May 15, 2026
ALLIANCEBERNSTEIN L.P. History No change 150,592 278 0.0% 0.0% 33 0 0.0% Q1 2026 May 15, 2026
Stonepine Capital Management, LLC History Reduced 164,045 257 0.1% 0.95% 34 -536,955 -76.6% Q1 2026 May 14, 2026
RHUMBLINE ADVISERS History Reduced 159,235 249 0.0% 0.0% 35 -3,538 -2.17% Q1 2026 May 12, 2026
Cornerstone Capital, Inc. History Added to 142,286 223 0.02% 0.02% 36 +33,075 30.29% Q1 2026 May 12, 2026
Invesco Ltd. History Reduced 135,087 212 0.0% 0.0% 37 -1,222 -0.9% Q1 2026 May 12, 2026
BANK OF AMERICA CORP /DE/ History Added to 121,656 191 0.0% 0.0% 38 +38,568 46.42% Q1 2026 May 15, 2026
JPMORGAN CHASE & CO History Reduced 120,102 187 0.0% 0.0% 39 -173,066 -59.03% Q1 2026 May 13, 2026
AQR CAPITAL MANAGEMENT LLC History Added to 115,647 181 0.0% 0.0% 40 +91,494 378.81% Q1 2026 May 15, 2026
UBS Group AG History Added to 102,507 160 0.0% 0.0% 41 +34,533 50.8% Q1 2026 May 05, 2026
DEUTSCHE BANK AG\ History Added to 92,670 145 0.0% 0.0% 42 +15,445 20.0% Q1 2026 May 06, 2026
PRICE T ROWE ASSOCIATES INC /MD/ History Added to 77,040 122 0.0% 0.0% 43 +23,850 44.84% Q1 2026 May 15, 2026
SEI INVESTMENTS CO History Added to 60,578 95 0.0% 0.0% 44 +17,718 41.34% Q1 2026 May 13, 2026
Vanguard Global Advisers, LLC History New 51,396 80 0.0% 45 +51,396 New Q1 2026 May 08, 2026
WELLS FARGO & COMPANY/MN History Reduced 50,133 78 0.0% 0.0% 46 -75,503 -60.1% Q1 2026 May 11, 2026
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. History Added to 50,113 78 0.0% 0.0% 47 +1,270 2.6% Q1 2026 May 15, 2026
Shay Capital LLC History New 49,662 77 0.01% 48 +49,662 New Q1 2026 May 15, 2026
MetLife Investment Management, LLC History Added to 48,132 75 0.0% 0.0% 49 +11,580 31.68% Q1 2026 May 14, 2026
XTX Topco Ltd History Added to 44,659 70 0.0% 0.0% 50 +32,637 271.48% Q1 2026 May 15, 2026
JACOBS LEVY EQUITY MANAGEMENT, INC History Reduced 42,966 67 0.0% 0.0% 51 -195,223 -81.96% Q1 2026 May 15, 2026
BLAIR WILLIAM & CO/IL History Added to 43,216 67 0.0% 0.0% 52 +5 0.01% Q1 2026 May 08, 2026
SUSQUEHANNA INTERNATIONAL GROUP, LLP History Added to 41,629 65 0.0% 0.0% 53 +25,671 160.87% Q1 2026 May 15, 2026
LPL Financial LLC History Added to 36,164 56 0.0% 0.0% 54 +16,810 86.86% Q1 2026 May 06, 2026
Tower Research Capital LLC (TRC) History Added to 35,306 55 0.0% 0.0% 55 +29,036 463.09% Q1 2026 May 15, 2026
AMERICAN CENTURY COMPANIES INC History New 34,816 54 0.0% 57 +34,816 New Q1 2026 May 15, 2026
WOODSTOCK CORP History Reduced 34,418 54 0.0% 0.01% 56 -822 -2.33% Q1 2026 Apr 08, 2026
BARCLAYS PLC History Reduced 28,760 45 0.0% 0.0% 58 -136,797 -82.63% Q1 2026 May 14, 2026
NINE MASTS CAPITAL Ltd History New 29,062 45 0.01% 61 +29,062 New Q1 2026 May 12, 2026
INTECH INVESTMENT MANAGEMENT LLC History Reduced 28,937 45 0.0% 0.0% 60 -8,883 -23.49% Q1 2026 May 08, 2026
MANUFACTURERS LIFE INSURANCE COMPANY, THE History No change 28,943 45 0.0% 0.0% 59 0 0.0% Q1 2026 May 15, 2026
Legato Capital Management LLC History Reduced 28,196 44 0.0% 0.0% 62 -2,483 -8.09% Q1 2026 May 14, 2026
JANE STREET GROUP, LLC History Reduced 27,551 43 0.0% 0.0% 63 -107,827 -79.65% Q1 2026 May 12, 2026
BNP PARIBAS FINANCIAL MARKETS History Added to 27,339 42 0.0% 0.0% 64 +1,469 5.68% Q1 2026 May 12, 2026
China Universal Asset Management Co., Ltd. History Added to 25,546 40 0.0% 0.0% 65 +2,089 8.91% Q1 2026 Apr 27, 2026
Vanguard Personalized Indexing Management, LLC History Reduced 25,227 39 0.0% 0.0% 66 -6,210 -19.75% Q1 2026 May 14, 2026
State of Wyoming History Added to 24,968 38 0.0% 0.0% 67 +12,451 99.47% Q1 2026 May 13, 2026
ProShare Advisors LLC History Reduced 22,552 35 0.0% 0.0% 68 -3,024 -11.82% Q1 2026 Apr 24, 2026
Police & Firemen's Retirement System of New Jersey History No change 22,568 35 0.0% 0.0% 69 0 0.0% Q1 2026 Apr 29, 2026
HighTower Advisors, LLC History Reduced 21,068 33 0.0% 0.0% 70 -314 -1.47% Q1 2026 May 05, 2026
BFSG, LLC History Added to 20,815 32 0.0% 0.0% 71 +380 1.86% Q1 2026 Apr 28, 2026
PRUDENTIAL FINANCIAL INC History New 19,279 30 0.0% 72 +19,279 New Q1 2026 May 13, 2026
VOYA INVESTMENT MANAGEMENT LLC History Reduced 18,190 28 0.0% 0.0% 73 -1,306 -6.7% Q1 2026 May 12, 2026
Thrive Wealth Management, LLC History No change 17,281 27 0.0% 0.0% 74 0 0.0% Q1 2026 Apr 09, 2026
Point72 Asset Management, L.P. History New 16,238 25 0.0% 75 +16,238 New Q1 2026 May 15, 2026
Connor, Clark & Lunn Investment Management Ltd. History Reduced 14,136 22 0.0% 0.0% 76 -4,809 -25.38% Q1 2026 May 11, 2026
VICTORY CAPITAL MANAGEMENT INC History Added to 13,488 21 0.0% 0.0% 77 +936 7.46% Q1 2026 May 15, 2026
CHOREO, LLC History Added to 12,178 19 0.0% 0.0% 78 +1,727 16.52% Q1 2026 May 12, 2026
NEW YORK STATE COMMON RETIREMENT FUND History No change 11,806 18 0.0% 0.0% 79 0 0.0% Q1 2026 May 06, 2026
Diversified Enterprises, LLC History New 11,311 17 0.0% 80 +11,311 New Q1 2026 May 14, 2026
Abel Hall, LLC History New 10,704 16 0.0% 83 +10,704 New Q1 2026 Apr 28, 2026
Integrated Wealth Concepts LLC History New 10,651 16 0.0% 82 +10,651 New Q1 2026 May 15, 2026
Russell Investments Group, Ltd. History Reduced 10,800 16 0.0% 0.0% 81 -139 -1.27% Q1 2026 May 08, 2026
Squarepoint Ops LLC History Reduced 10,032 15 0.0% 0.0% 86 -10,294 -50.64% Q1 2026 May 15, 2026
MERCER GLOBAL ADVISORS INC /ADV History New 10,048 15 0.0% 87 +10,048 New Q1 2026 May 15, 2026
CITIGROUP INC History Added to 9,752 15 0.0% 0.0% 84 +2,884 41.99% Q1 2026 May 11, 2026
Ameritas Investment Partners, Inc. History No change 9,652 15 0.0% 0.0% 85 0 0.0% Q1 2026 May 13, 2026
Legal & General Group Plc History Reduced 9,292 14 0.0% 0.0% 88 -265 -2.77% Q1 2026 May 08, 2026
Mirae Asset Global Investments Co., Ltd. History Added to 7,829 12 0.0% 0.0% 89 +834 11.92% Q1 2026 May 04, 2026
Steigerwald, Gordon & Koch Inc. History No change 7,673 12 0.0% 0.0% 90 0 0.0% Q1 2026 Apr 28, 2026
CWM, LLC History Added to 7,599 11 0.0% 0.0% 91 +5,106 204.81% Q1 2026 May 14, 2026
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM History Reduced 6,243 9 0.0% 0.0% 92 -233 -3.6% Q1 2026 May 15, 2026
OSAIC HOLDINGS, INC. History Reduced 5,499 8 0.0% 0.0% 93 -9,969 -64.45% Q1 2026 May 15, 2026
MAI Capital Management History Reduced 4,821 7 0.0% 0.0% 94 -1,915 -28.43% Q1 2026 May 15, 2026
Sterling Capital Management LLC History Reduced 3,307 5 0.0% 0.0% 95 -2,315 -41.18% Q1 2026 Apr 22, 2026
GF FUND MANAGEMENT CO. LTD. History Added to 3,201 5 0.0% 0.0% 96 +373 13.19% Q1 2026 Apr 15, 2026
ROYAL BANK OF CANADA History Reduced 1,751 3 0.0% 0.0% 97 -3,051 -63.54% Q1 2026 May 15, 2026
Allworth Financial LP History Added to 2,451 3 0.0% 0.0% 98 +324 15.23% Q1 2026 May 14, 2026
Jackson, Grant Investment Advisers, Inc. History No change 2,450 3 0.0% 0.0% 99 0 0.0% Q1 2026 May 08, 2026
Redwood Park Advisors LLC History No change 2,184 3 0.0% 0.0% 100 0 0.0% Q1 2026 May 04, 2026
Larson Financial Group LLC History Reduced 1,444 2 0.0% 0.0% 102 -26 -1.77% Q1 2026 May 15, 2026
Parallel Advisors, LLC History No change 1,854 2 0.0% 0.0% 101 0 0.0% Q1 2026 Jun 02, 2026
Essential Partners LLC History New 1,060 1 0.0% 106 +1,060 New Q1 2026 May 21, 2026
GAMMA Investing LLC History Added to 932 1 0.0% 105 +458 96.62% Q1 2026 Apr 06, 2026
Optiver Holding B.V. History Reduced 944 1 0.0% 0.0% 104 -312 -24.84% Q1 2026 Jun 02, 2026
Cheviot Value Management, LLC History No change 980 1 0.0% 0.0% 103 0 0.0% Q1 2026 May 12, 2026
Woodline Partners LP History Closed out 0 0 0.0% -285,714 -100.0% Q1 2026 May 15, 2026
CONNORS INVESTOR SERVICES INC History Closed out 0 0 0.01% -61,941 -100.0% Q1 2026 May 15, 2026
ACADIAN ASSET MANAGEMENT LLC History Closed out 0 0 0.0% -47,625 -100.0% Q1 2026 May 13, 2026
BOOTHBAY FUND MANAGEMENT, LLC History Closed out 0 0 0.0% -47,596 -100.0% Q1 2026 May 15, 2026
AMERIPRISE FINANCIAL INC History Closed out 0 0 0.0% -32,749 -100.0% Q1 2026 May 15, 2026
Brevan Howard Capital Management LP History Closed out 0 0 0.0% -24,415 -100.0% Q1 2026 May 15, 2026
SG Americas Securities, LLC History Closed out 0 0 0.0% -23,141 -100.0% Q1 2026 Apr 16, 2026
ALGERT GLOBAL LLC History Closed out 0 0 0.0% -20,498 -100.0% Q1 2026 May 14, 2026
BBR PARTNERS, LLC History Closed out 0 0 0.0% -20,000 -100.0% Q1 2026 May 12, 2026
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO History Closed out 0 0 0.0% -15,321 -100.0% Q1 2026 May 14, 2026
Avior Wealth Management, LLC History Closed out 0 0 0.0% -10,704 -100.0% Q1 2026 Apr 09, 2026
AMALGAMATED BANK History Closed out 0 0 0.0% -3,304 -100.0% Q1 2026 May 08, 2026
Smartleaf Asset Management LLC History Closed out 0 0 0.0% -2,458 -100.0% Q1 2026 May 15, 2026
EverSource Wealth Advisors, LLC History Reduced 510 0 0.0% -1,493 -74.54% Q1 2026 May 15, 2026
Spire Wealth Management History Closed out 0 0 0.0% -1,200 -100.0% Q1 2026 Apr 22, 2026
Daiwa Securities Group Inc. History Closed out 0 0 0.0% -475 -100.0% Q1 2026 May 13, 2026
Western Wealth Management, LLC History New 416 0 +416 New Q1 2026 May 19, 2026
ST GERMAIN D J CO INC History Closed out 0 0 -367 -100.0% Q1 2026 Apr 13, 2026
NewEdge Advisors, LLC History Closed out 0 0 -189 -100.0% Q1 2026 Jun 02, 2026
Scarborough Advisors, LLC History Closed out 0 0 -161 -100.0% Q1 2026 May 07, 2026
SIMPLEX TRADING, LLC History Reduced 283 0 -147 -34.19% Q1 2026 May 14, 2026
FIFTH THIRD BANCORP History New 127 0 +127 New Q1 2026 May 01, 2026
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC History New 127 0 +127 New Q1 2026 May 13, 2026
IFP Advisors, Inc History New 95 0 +95 New Q1 2026 Apr 13, 2026
ROTHSCHILD INVESTMENT LLC History Added to 88 0 +85 2833.33% Q1 2026 May 07, 2026
TWIN PEAKS WEALTH ADVISORS, LLC History New 58 0 +58 New Q1 2026 May 08, 2026
Farther Finance Advisors, LLC History Added to 31 0 +30 3000.0% Q1 2026 Apr 07, 2026
Transamerica Financial Advisors, LLC History New 29 0 +29 New Q1 2026 May 15, 2026
NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO History Closed out 0 0 -29 -100.0% Q1 2026 May 07, 2026
MATHER GROUP, LLC. History New 21 0 +21 New Q1 2026 Apr 13, 2026
Wealth Preservation Advisors, LLC History New 19 0 +19 New Q1 2026 May 15, 2026
Covestor Ltd History Closed out 0 0 -19 -100.0% Q1 2026 May 05, 2026
American Capital Advisory, LLC History Closed out 0 0 -19 -100.0% Q1 2026 Apr 29, 2026
Garton & Associates Financial Advisors LLC History Closed out 0 0 -18 -100.0% Q1 2026 May 11, 2026
Arax Advisory Partners History Reduced 8 0 -16 -66.67% Q1 2026 May 13, 2026
Root Financial Partners, LLC History New 13 0 +13 New Q1 2026 Apr 24, 2026
True Wealth Design, LLC History Added to 16 0 +10 166.67% Q1 2026 Apr 13, 2026
SJS Investment Consulting Inc. History New 3 0 +3 New Q1 2026 Apr 23, 2026
Caitong International Asset Management Co., Ltd History Reduced 1 0 -1 -50.0% Q1 2026 May 11, 2026
CENTRAL TRUST Co History No change 171 0 0 0.0% Q1 2026 Apr 17, 2026
COMERICA BANK History No change 127 0 0 0.0% Q4 2025 Jan 29, 2026
NISA INVESTMENT ADVISORS, LLC History No change 490 0 0 0.0% Q1 2026 Apr 30, 2026
FARMERS & MERCHANTS INVESTMENTS INC History No change 53 0 0 0.0% Q1 2026 Apr 23, 2026
CIBC Private Wealth Group LLC History No change 294 0 0 0.0% Q4 2025 Feb 12, 2026
North Star Investment Management Corp. History No change 550 0 0.0% 0 0.0% Q1 2026 Apr 23, 2026
SIGNATUREFD, LLC History No change 361 0 0 0.0% Q1 2026 Apr 07, 2026
Dynamic Wealth Strategies, LLC History No change 411 0 0 0.0% Q1 2026 May 13, 2026
SBI Securities Co., Ltd. History No change 24 0 0 0.0% Q1 2026 Apr 27, 2026
Comprehensive Financial Planning, Inc./PA History No change 323 0 0 0.0% Q1 2026 Apr 07, 2026