OmniAb
Provides antibody-discovery technologies that feed partner drug programs and royalty economics.
$4.40
After-hours close−0.07 (−1.47%)
At close$4.47(−3.04%)
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Breakdown13F · Form 4
Institutions 38.59%55.95M sharesInsiders 5.86%8.50M sharesOther 55.55%80.52M shares
Shares outstanding 144.97M · Float 118.44M · 81.7% free float
Institutions13F, as of Mar 31, 2026
130 holders · 55.95M shares · 25 new positions · 67 increased · 38 reduced · 24 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| Whitefort Capital Management, LP | 14.22M | 9.81% | 0 | May 15, 2026 |
| BlackRock, Inc. | 8.11M | 5.59% | +41.9K | May 13, 2026 |
| Cadian Capital Management, LP | 4.16M | 2.87% | −277.8K | May 15, 2026 |
| Vanguard Capital Management LLC | 3.99M | 2.75% | +3.99Mnew | May 15, 2026 |
| Geode Capital Management, LLC | 2.93M | 2.02% | +202.9K | May 15, 2026 |
| Rice Hall James & Associates, LLC | 2.55M | 1.76% | +146.2K | May 15, 2026 |
| Private Management Group Inc | 2.43M | 1.68% | +8.7K | May 8, 2026 |
| State Street Corp | 2.07M | 1.43% | +18.1K | May 15, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| Whitefort Capital Management, LP | 9.90% | 14.22M | 13G | Nov 14, 2025 ↗ |
| Ash X LP | 5.30% | 7.56M | 13G | Feb 10, 2026 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| Matthew W. Foehr | director, officer: President and CEO | 4.42M | 3.05% | Apr 7, 2026 |
| John L. Higgins | director | 2.96M | 2.04% | Jun 18, 2026 |
| Charles S. Berkman | officer: Chief Legal Officer | 399.1K | 0.28% | Apr 7, 2026 |
| Kurt A. Gustafson | officer: Executive VP, Finance and CFO | 261.5K | 0.18% | Apr 7, 2026 |
| Jennifer R. Cochran | director | 185.3K | 0.13% | Jun 18, 2026 |
| Carolyn R. Bertozzi | director | 113.3K | 0.08% | Jun 18, 2026 |
| Steven Love | director | 91.7K | 0.06% | Jun 18, 2026 |
| Steven C. Crouse | director | 33.3K | 0.02% | Jun 18, 2026 |
| Philip J. Gotwals | director | 33.3K | 0.02% | Jun 18, 2026 |
3 ten-percent owners hold 20.27M shares by Form 4, outside the officers-and-directors figure above · 5 people have not refiled in the last 18 months (1.50M shares), so they are not in the figure above
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Apr 7, 2026 | Charles S. Berkmanofficer: Chief Legal Officer | Sale | 7,157 | $1.49 | 399,085 |
| Apr 7, 2026 | Kurt A. Gustafsonofficer: Executive VP, Finance and CFO | Sale | 6,913 | $1.49 | 261,483 |
| Apr 7, 2026 | Matthew W. Foehrdirector, officer: President and CEO | Sale | 19,244 | $1.49 | 4,420,492 |
| Feb 18, 2026 | Matthew W. Foehrdirector, officer: President and CEO | Sale | 30,843 | $1.71 | 4,403,277 |
| Feb 18, 2026 | Kurt A. Gustafsonofficer: Executive VP, Finance and CFO | Sale | 9,301 | $1.71 | 268,851 |
| Feb 18, 2026 | Charles S. Berkmanofficer: Chief Legal Officer | Sale | 9,673 | $1.71 | 392,700 |
| Feb 17, 2026 | Charles S. Berkmanofficer: Chief Legal Officer | Sale | 6,990 | $1.70 | 383,623 |
| Feb 17, 2026 | Kurt A. Gustafsonofficer: Executive VP, Finance and CFO | Sale | 6,828 | $1.70 | 259,402 |
| Feb 17, 2026 | Matthew W. Foehrdirector, officer: President and CEO | Sale | 20,754 | $1.70 | 4,375,787 |
| Dec 8, 2025 | Matthew W. Foehrdirector, officer: President and CEO | Sale | 13,666 | $1.96 | 4,360,083 |
CongressHouse and Senate disclosures
Not reported.