Who owns Personalis, Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of PSNL from SEC Form 13F filings across 158 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 158 institutions disclosed 85.0M shares of Personalis, Inc. worth $1.14B — about 80.6% of shares outstanding; the largest disclosed holder is Merck & Co., Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.
158
13F holders
$1.14B
value, 2026 filers
80.6%
of shares outstanding (85.0M sh)
43
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of PSNL's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | Merck & Co., Inc. | 14.0M | $188.2M | 35.8% | 13.3% | 0.0% |
| 2 | ARK Investment Management LLC | 8.3M | $110.8M | 0.7% | 7.8% | +4.1% |
| 3 | BlackRock, Inc. | 7.1M | $94.9M | 0.0% | 6.7% | +31.4% |
| 4 | LIGHTSPEED MANAGEMENT COMPANY, L.L.C. | 6.1M | $81.8M | 3.4% | 5.8% | -25.2% |
| 5 | AMERIPRISE FINANCIAL INC | 6.1M | $81.6M | 0.0% | 5.8% | -19.8% |
| 6 | Deep Track Capital, LP | 4.0M | $53.6M | 0.8% | 3.8% | +33.3% |
| 7 | Aberdeen Group plc | 3.7M | $50.2M | 0.1% | 3.6% | +7.4% |
| 8 | VANGUARD CAPITAL MANAGEMENT LLC | 3.0M | $40.3M | 0.0% | 2.9% | +4.9% |
| 9 | Casdin Capital, LLC | 2.5M | $34.2M | 1.7% | 2.4% | +59.4% |
| 10 | KENNEDY CAPITAL MANAGEMENT LLC | 2.4M | $31.7M | 0.6% | 2.2% | +8.3% |
| 11 | GEODE CAPITAL MANAGEMENT, LLC | 1.8M | $24.4M | 0.0% | 1.7% | +40.4% |
| 12 | BANK OF AMERICA CORP /DE/ | 1.8M | $24.4M | 0.0% | 1.7% | +1535.6% |
| 13 | AIGH Capital Management LLC | 1.7M | $23.0M | 1.4% | 1.6% | -40.9% |
| 14 | Blue Water Life Science Advisors, LP | 1.7M | $22.5M | 14.1% | 1.6% | 0.0% |
| 15 | DIMENSIONAL FUND ADVISORS LP | 1.5M | $20.1M | 0.0% | 1.4% | +40.4% |
| 16 | STATE STREET CORP | 1.5M | $19.9M | 0.0% | 1.4% | +31.1% |
| 17 | MORGAN STANLEY | 1.3M | $17.0M | 0.0% | 1.2% | +435.6% |
| 18 | GOLDMAN SACHS GROUP INC | 931,031 | $12.5M | 0.0% | 0.9% | +26.3% |
| 19 | HRT FINANCIAL LP | 930,816 | $12.5M | 0.0% | 0.9% | +345.6% |
| 20 | Nuveen, LLC | 753,004 | $10.1M | 0.0% | 0.7% | +119.2% |
| 21 | JANE STREET GROUP, LLCNEW | 738,241 | $9.9M | 0.0% | 0.7% | new |
| 22 | VANGUARD PORTFOLIO MANAGEMENT LLC | 659,834 | $8.8M | 0.0% | 0.6% | +17.7% |
| 23 | NORTHERN TRUST CORP | 632,803 | $8.5M | 0.0% | 0.6% | +55.9% |
| 24 | Trexquant Investment LPNEW | 600,216 | $8.0M | 0.0% | 0.6% | new |
| 25 | HOWLAND CAPITAL MANAGEMENT LLC | 555,641 | $7.4M | 0.3% | 0.5% | +1.6% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.