Personalis
Whole-genome liquid biopsy tests that track cancer recurrence at the molecular level.
$17.35
After-hours close+0.27 (+1.57%)
At close$17.08(+1.67%)
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Breakdown13F · Form 4
Institutions 79.26%84.61M sharesInsiders 0.79%843.6K sharesOther 19.95%21.29M shares
Shares outstanding 106.75M · Float 65.77M · 61.6% free float
Institutions13F, as of Mar 31, 2026
147 holders · 84.61M shares · 38 new positions · 85 increased · 37 reduced · 20 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| Merck & Co., Inc. | 14.04M | 13.16% | 0 | May 13, 2026 |
| Lightspeed Management Company, L.L.C. | 8.16M | 7.64% | 0 | May 15, 2026 |
| Ark Investment Management LLC | 7.94M | 7.44% | +65.0K | May 12, 2026 |
| Ameriprise Financial Inc | 7.59M | 7.11% | +1.31M | Jul 17, 2026 |
| BlackRock, Inc. | 5.39M | 5.05% | +70.4K | May 13, 2026 |
| T. Rowe Price Investment Management, Inc. | 4.76M | 4.46% | −6.02M | May 15, 2026 |
| Abrdn PLC | 3.49M | 3.27% | +238.4K | Apr 29, 2026 |
| Deep Track Capital, LP | 3.00M | 2.81% | +3.00Mnew | May 15, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| Tempus AI, Inc. | 12.50% | 13.04M | 13D | Jul 21, 2026 ↗ |
| ARK Investment Management LLC | 8.14% | 7.19M | 13G | May 14, 2025 ↗ |
| Ameriprise Financial, Inc. | 7.10% | 6.29M | 13G | Feb 17, 2026 ↗ |
| BlackRock, Inc. | 5.90% | 6.17M | 13G | Jul 29, 2026 ↗ |
| Deep Track Capital, LP | 5.51% | 5.76M | 13G | May 12, 2026 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| Tempus AI, Inc. | 10 percent owner | 13.04M | 12.21% | Feb 13, 2026 |
| Christopher M. Hall | director, officer: Chief Executive Officer | 236.0K | 0.22% | Jul 9, 2026 |
| Aaron Tachibana | officer: CFO AND COO | 198.8K | 0.19% | Jun 29, 2026 |
| Richard Chen | officer: President and CMO | 173.9K | 0.16% | Jul 15, 2026 |
| Stephen Michael Moore | officer: SVP and Chief Legal Officer | 92.3K | 0.09% | Mar 17, 2026 |
| Lonnie Shoff | director | 37.2K | 0.03% | May 14, 2026 |
| Woodrow A. Jr Myers | director | 32.4K | 0.03% | May 14, 2026 |
| Olivia Kyusuk Bloom | director | 27.3K | 0.03% | May 14, 2026 |
| Karin Eastham | director | 19.8K | 0.02% | Jun 11, 2026 |
| A. Blaine Bowman | director | 19.8K | 0.02% | May 14, 2026 |
6 ten-percent owners hold 31.01M shares by Form 4 — the 13D/G table above shows those stakes, the figure above counts officers and directors only · 9 people have not refiled in the last 18 months (2.69M shares), so they are not in the figure above
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Jul 15, 2026 | Richard Chenofficer: President and CMO | Sale | 100,000 | $15.15 | 173,880 |
| Jul 9, 2026 | Christopher M. Halldirector, officer: Chief Executive Officer | Sale | 100,000 | $15.08 | 235,986 |
| Jun 29, 2026 | Aaron Tachibanaofficer: CFO AND COO | Sale | 4,982 | $14.00 | 198,833 |
| Jun 26, 2026 | Christopher M. Halldirector, officer: Chief Executive Officer | Sale | 100,000 | $13.15 | 235,986 |
| Jun 26, 2026 | Aaron Tachibanaofficer: CFO AND COO | Sale | 51,251 | $13.18 | 198,833 |
| Jun 4, 2026 | Aaron Tachibanaofficer: CFO AND COO | Sale | 40,000 | $12.01 | 198,833 |
| May 29, 2026 | Aaron Tachibanaofficer: CFO AND COO | Sale | 38,799 | $11.58 | 198,833 |
| May 29, 2026 | Christopher M. Halldirector, officer: Chief Executive Officer | Sale | 80,091 | $11.02 | 235,986 |
| Nov 18, 2025 | Tempus AI, Inc.10 percent owner | Purchase | 64,750 | $7.67 | 12,783,550 |
| Nov 19, 2025 | Tempus AI, Inc.10 percent owner | Purchase | 30,645 | $8.12 | 12,814,195 |
CongressHouse and Senate disclosures
Not reported.