| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Whitefort Capital Management, LP | 9.9% | +19% | $22,757,853 | +$6,373,619 | 14,223,658 | +39% | Whitefort Capital Management, LP | 30 Sep 2025 |
| Ash X LP | 7% | +34% | $19,740,322 | +$7,000,001 | 10,071,593 | +55% | Robert Goldstein | 26 Aug 2025 |
| JANUS HENDERSON GROUP PLC | 0.8% | -83% | $2,086,555 | -$15,655,944 | 948,434 | -88% | JANUS HENDERSON GROUP PLC | 30 Jun 2025 |
As of 30 Sep 2025, 138 institutional investors reported holding 62,966,400 shares of OmniAb, Inc. - Common Stock, $0.0001 par value per share (OABI). This represents 44% of the company’s total 143,673,313 outstanding shares.
The largest institutional shareholders of OmniAb, Inc. - Common Stock, $0.0001 par value per share (OABI) together control 40% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| Whitefort Capital Management, LP | 9.9% | 14,223,658 | +39% | 7.5% | $22,757,853 |
| BlackRock, Inc. | 4.8% | 6,964,222 | -0.53% | 0% | $11,142,756 |
| VANGUARD GROUP INC | 3.6% | 5,148,061 | -2.3% | 0% | $8,236,897 |
| CADIAN CAPITAL MANAGEMENT, LP | 2.6% | 3,675,568 | 0.35% | $5,880,909 | |
| Woodline Partners LP | 2% | 2,857,142 | 0.02% | $4,571,427 | |
| DIMENSIONAL FUND ADVISORS LP | 1.8% | 2,548,284 | -13% | 0% | $4,077,330 |
| PRIVATE MANAGEMENT GROUP INC | 1.8% | 2,518,279 | -1.6% | 0.12% | $4,029,246 |
| RICE HALL JAMES & ASSOCIATES, LLC | 1.7% | 2,412,038 | -8.2% | 0.21% | $3,859,261 |
| GEODE CAPITAL MANAGEMENT, LLC | 1.6% | 2,326,236 | -4.6% | 0% | $3,722,772 |
| Stonepine Capital Management, LLC | 1.5% | 2,142,857 | 2.8% | $3,428,571 | |
| STATE STREET CORP | 1.5% | 2,094,846 | +4.2% | 0% | $3,351,754 |
| ADAR1 Capital Management, LLC | 0.76% | 1,090,628 | +234% | 0.17% | $1,745,005 |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 0.7% | 1,006,256 | -9% | 0.01% | $1,610,010 |
| Nuveen, LLC | 0.61% | 874,510 | +79% | 0% | $1,399,216 |
| CITADEL ADVISORS LLC | 0.58% | 836,799 | -61% | 0% | $1,338,878 |
| TOWERVIEW LLC | 0.58% | 831,100 | 0% | 0.97% | $1,329,760 |
| MORGAN STANLEY | 0.57% | 820,222 | +6.9% | 0% | $1,312,355 |
| NORTHERN TRUST CORP | 0.57% | 818,466 | -2.2% | 0% | $1,309,546 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.55% | 785,477 | -5.6% | 0% | $1,256,763 |
| JPMORGAN CHASE & CO | 0.53% | 762,912 | -3.9% | 0% | $1,220,659 |
| ISTHMUS PARTNERS, LLC | 0.47% | 669,071 | +18% | 0.24% | $1,070,514 |
| GOLDMAN SACHS GROUP INC | 0.41% | 587,786 | +92% | 0% | $940,458 |
| RENAISSANCE TECHNOLOGIES LLC | 0.36% | 523,454 | -26% | 0% | $837,526 |
| Kent Lake PR LLC | 0.35% | 500,000 | -71% | 0.41% | $800,000 |
| WOODSTOCK CORP | 0.24% | 351,753 | -43% | 0.05% | $562,805 |
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2025 Q4 | 88,423 | $163,773 | -$586,205 | $1.85 | 8 |
| 2025 Q3 | 62,966,400 | $100,537,347 | +$12,809,155 | $1.60 | 138 |
| 2025 Q2 | 55,028,248 | $95,538,152 | -$30,177,530 | $1.74 | 142 |
| 2025 Q1 | 63,239,232 | $151,919,353 | -$2,099,490 | $2.40 | 148 |
| 2024 Q4 | 63,382,072 | $224,374,988 | -$2,204,897 | $3.54 | 161 |
| 2024 Q3 | 79,658,040 | $334,361,661 | +$4,940,077 | $4.23 | 160 |
| 2024 Q2 | 79,082,289 | $293,789,491 | -$22,676,741 | $3.75 | 154 |
| 2024 Q1 | 83,603,596 | $450,161,135 | -$1,041,679 | $5.42 | 151 |
| 2023 Q4 | 83,756,153 | $513,879,428 | -$6,358,794 | $6.17 | 155 |
| 2023 Q3 | 68,671,481 | $355,812,525 | +$6,545,772 | $5.19 | 146 |
| 2023 Q2 | 67,366,149 | $338,275,965 | +$9,139,522 | $5.03 | 139 |
| 2023 Q1 | 66,221,011 | $243,264,177 | +$5,201,932 | $3.68 | 138 |
| 2022 Q4 | 65,164,685 | $234,990,736 | +$222,348,609 | $3.60 | 145 |
| 2022 Q3 | 1,101,548 | $11,247,000 | +$11,247,000 | $10.21 | 1 |