PERSONALIS INC PSNL
COM · Common Stock · CUSIP 71535D106
Company in Menlo Park, United States
- SectorHealth care
- IndustryServices-Medical Laboratories
- HeadquartersFremont, CA
- Founded2011
- Websitepersonalis.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($4.3m this quarter). Holder counts are more reliable. Shares outstanding: 70.6m as of 2024-10-30, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $5.78. Options: 4 managers hold calls ($481.9k notional), 5 hold puts ($510.6k).
Trends to Q4 2024
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 81 |
| Q4 2022 | 81 |
| Q1 2023 | 64 |
| Q2 2023 | 67 |
| Q3 2023 | 64 |
| Q4 2023 | 70 |
| Q1 2024 | 72 |
| Q2 2024 | 70 |
| Q3 2024 | 84 |
| Q4 2024 | 108 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q1 2023 | 33 | 40 |
| Q2 2023 | 25 | 31 |
| Q3 2023 | 18 | 34 |
| Q4 2023 | 32 | 26 |
| Q1 2024 | 35 | 29 |
| Q2 2024 | 18 | 39 |
| Q3 2024 | 40 | 36 |
| Q4 2024 | 48 | 42 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q1 2024 | $4.2k | $745 | 0.18 |
| Q2 2024 | $34.5k | $0 | 0.00 |
| Q3 2024 | $182.6k | $459.5k | 2.52 |
| Q4 2024 | $481.9k | $510.6k | 1.06 |
Biggest buyers
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | +718.3k |
| Aberdeen Group plc | New | +297.9k |
| Qube Research & Technologies Ltd | Added | +267.7k |
| DIMENSIONAL FUND ADVISORS LP | Added | +242.1k |
| JANE STREET GROUP, LLC | Added | +237.0k |
| MORGAN STANLEY | Added | +140.9k |
| GOLDMAN SACHS GROUP INC | Added | +140.2k |
| 683 Capital Management, LLC | New | +134.0k |
| Blue Water Life Science Advisors, LP | Added | +132.9k |
| Williams Jones Wealth Management, LLC. | Added | +118.6k |
Biggest sellers
| MILLENNIUM MANAGEMENT LLC | Reduced | -1.1m |
| MARSHALL WACE, LLP | Reduced | -387.0k |
| ARK Investment Management LLC | Reduced | -310.1k |
| VANGUARD GROUP INC | Reduced | -235.7k |
| AIGH Capital Management LLC | Reduced | -200.0k |
| Walleye Capital LLC | Reduced | -154.9k |
| Informed Momentum Co LLC | Sold out | -143.4k |
| Cubist Systematic Strategies, LLC | Reduced | -131.6k |
| ACADIAN ASSET MANAGEMENT LLC | Reduced | -92.2k |
| Semanteon Capital Management, LP | Sold out | -69.6k |
Biggest calls
| SIMPLEX TRADING, LLC | Added | $394.0k68.2k shares |
| CITADEL ADVISORS LLC | Reduced | $63.0k10.9k shares |
| GROUP ONE TRADING LLC | Added | $24.9k4.3k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| CITADEL ADVISORS LLC | Reduced | $351.4k60.8k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $156.1k27.0k shares |
| SIMPLEX TRADING, LLC | Added | $2.0k500 shares |
| GROUP ONE TRADING LLC | New | $1.2k200 shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| Merck & Co., Inc. 13G · passive investor new · filed 2024-12-23 | 16.5% |
Tempus AI, Inc.
13D · may seek influence
-1.9 pts · filed 2026-07-21
Stated purposeMerger Agreement Following conclusion of confidential preliminary discussions between the Issuer and Tempus, and in response to the Issuer's request for Tempus to submit a proposal, on July 19, 2026, Tempus submitted a non-binding proposal to acquire all of the outstanding Common Stock of the Issuer. On July 20, 2026, Tempus entered into an Agreement and Plan of Merger (the "Merger Agreement") with the Issuer, Aviary Development, Inc., a Delaware corporation and a direct, wholly owned subsidiary of Tempus ("Merger Sub I") and Toucan Development, LLC, a Nevada limited liability company and a direct, wholly owned subsidiary of Tempus ("Merger Sub II" and, together with Merger Sub I, the "Merger Subs"). Pursuant to the Merger Agreement, and upon the terms and subject to the conditions therei… Full filing |
12.6% |
| ARK Investment Management LLC 13G · institution -1.4 pts · filed 2025-05-14 | 8.1% |
| BlackRock, Inc. 13G · institution +2.4 pts · filed 2026-07-29 | 5.9% |
| AMERIPRISE FINANCIAL INC 13G · institution -1.3 pts · filed 2026-08-14 | 5.8% |
Fell to 5% or below in the last year: KEYWELL BRADLEY A (3.5%, 2026-10-28), Deep Track Capital, LP (3.8%, 2026-08-14), Lightspeed Venture Partners Select IV, L.P. (2.0%, 2026-06-10), T. Rowe Price Investment Management, Inc. (4.5%, 2026-04-08), HIRSCHMAN ORIN (3.8%, 2026-01-29), Red Sky Ventures LLC (4.7%, 2025-11-13)
Insider purchases and sales in Q4 2024
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q1 2023 | 0 | — | 2 | $17.8k | — |
| Q2 2023 | 0 | — | 3 | $47.3k | — |
| Q3 2023 | 0 | — | 2 | $2.6k | — |
| Q4 2023 | 0 | — | 4 | $42.2k | — |
| Q1 2024 | 1 | $16.7k | 2 | $1.7k | — |
| Q2 2024 | 0 | — | 3 | $29.5k | — |
| Q3 2024 | 0 | — | 2 | $3.8k | — |
| Q4 2024 | 0 | — | 4 | $207.6k | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2024-12-16 | Tachibana Aaron CFO AND COO | Sold | $26.2k6.9k shares |
| 2024-12-16 | Chen Richard CHIEF MEDICAL OFFICER AND EVP | Sold | $18.5k4.8k shares |
| 2024-12-16 | Moore Stephen Michael SVP and Chief Legal Officer | Sold | $5.8k1.5k shares |
| 2024-11-18 | Moore Stephen Michael SVP and Chief Legal Officer | Sold | $6.4k1.7k shares |
| 2024-11-18 | Tachibana Aaron CFO AND COO | Sold | $5.0k1.3k shares |
| 2024-11-18 | Chen Richard CHIEF MEDICAL OFFICER AND EVP | Sold | $3.5k921 shares |
| 2024-11-01 | Hall Christopher M PRESIDENT AND CEO, director | Sold | $142.3k26.4k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q4 2024
| Manager | Shares | Change |
|---|---|---|
| Merck & Co., Inc. 35.61% of their portfolio | 14.0m $81.2m | First filing |
| LIGHTSPEED MANAGEMENT COMPANY, L.L.C. 16.63% of their portfolio | 8.2m $47.2m | First filing |
| ARK Investment Management LLC 0.33% of their portfolio | 6.8m $39.2m | Reduced -310.1k |
| AIGH Capital Management LLC 8.27% of their portfolio | 3.8m $22.0m | Reduced -200.0k |
| BlackRock, Inc. 0.00% of their portfolio | 3.0m $17.1m | Added +39.5k |
| VANGUARD GROUP INC 0.00% of their portfolio | 1.7m $10.0m | Reduced -235.7k |
| MILLENNIUM MANAGEMENT LLC 0.01% of their portfolio | 1.3m $7.6m | Reduced -1.1m |
| Blue Water Life Science Advisors, LP 5.80% of their portfolio | 1.1m $6.5m | Added +132.9k |
| RENAISSANCE TECHNOLOGIES LLC 0.01% of their portfolio | 920.9k $5.3m | Reduced -10.2k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.01% of their portfolio | 873.1k $5.0m | Added +718.3k |
| Sumitomo Mitsui Trust Group, Inc. 0.00% of their portfolio | 733.3k $4.2m | Reduced -59.3k |
| Amova Asset Management Americas, Inc. 0.05% of their portfolio | 733.3k $4.2m | Reduced -59.3k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 498.1k $2.9m | Reduced -377 |
| STATE OF MICHIGAN RETIREMENT SYSTEM 0.01% of their portfolio | 493.8k $2.9m | Unchanged |
| Wellington Shields Capital Management, LLC 0.44% of their portfolio | 431.2k $2.5m | Reduced -1.0k |
| ACADIAN ASSET MANAGEMENT LLC 0.01% of their portfolio | 415.9k $2.4m | Reduced -92.2k |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 410.1k $2.4m | Added +242.1k |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 401.3k $2.3m | Added +237.0k |
| Qube Research & Technologies Ltd 0.00% of their portfolio | 398.5k $2.3m | Added +267.7k |
| JACOBS LEVY EQUITY MANAGEMENT, INC 0.01% of their portfolio | 388.5k $2.2m | Reduced -17.1k |
| Aberdeen Group plc 0.00% of their portfolio | 297.9k $1.7m | New |
| Wellington Shields & Co., LLC 0.52% of their portfolio | 292.5k $1.7m | Unchanged |
| HOWLAND CAPITAL MANAGEMENT LLC 0.07% of their portfolio | 262.6k $1.5m | Unchanged |
| PERKINS CAPITAL MANAGEMENT INC 1.32% of their portfolio | 257.3k $1.5m | Unchanged |
| Bruce & Co., Inc. 0.47% of their portfolio | 253.0k $1.5m | Reduced -47.0k |
| MORGAN STANLEY 0.00% of their portfolio | 249.7k $1.4m | Added +140.9k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 212.5k $1.2m | Reduced -30.5k |
| STATE STREET CORP 0.00% of their portfolio | 198.4k $1.1m | Added +23.2k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 182.7k $1.1m | Added +140.2k |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 145.7k $841.9k | Added +67.4k |
| LPL Financial LLC 0.00% of their portfolio | 143.9k $831.8k | Reduced -6.8k |
| Williams Jones Wealth Management, LLC. 0.01% of their portfolio | 134.1k $774.9k | Added +118.6k |
| 683 Capital Management, LLC 0.08% of their portfolio | 134.0k $774.5k | New |
| BARCLAYS PLC 0.00% of their portfolio | 109.4k $632.1k | Added +43.9k |
| Connor, Clark & Lunn Investment Management Ltd. 0.00% of their portfolio | 103.6k $598.7k | Reduced -5.2k |
| Jump Financial, LLC 0.01% of their portfolio | 101.7k $588.0k | New |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 99.0k $572.4k | Added +64.0k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 95.0k $550.0k | Unchanged |
| Squarepoint Ops LLC 0.00% of their portfolio | 91.7k $529.9k | Added +74.7k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 89.0k $514.4k | Reduced -4.4k |
| GSA CAPITAL PARTNERS LLP 0.04% of their portfolio | 86.3k $499.0k | Reduced -37.7k |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 85.6k $494.8k | Unchanged |
| OMERS ADMINISTRATION Corp 0.00% of their portfolio | 81.4k $470.5k | New |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 75.9k $439.0k | Reduced -1.5k |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 71.9k $415.3k | Added +71.7k |
| MARSHALL WACE, LLP 0.00% of their portfolio | 70.0k $404.7k | Reduced -387.0k |
| Balyasny Asset Management L.P. 0.00% of their portfolio | 60.1k $347.5k | New |
| AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio | 50.3k $290.9k | Added +25.0k |
| CITIGROUP INC 0.00% of their portfolio | 48.2k $278.8k | Reduced -27.6k |
| EntryPoint Capital, LLC 0.12% of their portfolio | 47.5k $274.6k | New |
| Dynamic Technology Lab Private Ltd 0.04% of their portfolio | 43.7k $252.0k | New |
| UBS Group AG 0.00% of their portfolio | 41.9k $242.3k | Added +34.9k |
| HSBC HOLDINGS PLC 0.00% of their portfolio | 40.9k $230.0k | Unchanged |
| Centiva Capital, LP 0.01% of their portfolio | 40.4k $233.3k | Reduced -30.2k |
| Jefferies Financial Group Inc. 0.00% of their portfolio | 39.6k $228.9k | Added +20.2k |
| Green Alpha Advisors, LLC 0.18% of their portfolio | 39.0k $225.3k | Reduced -26.5k |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC 0.00% of their portfolio | 37.7k $217.7k | First filing |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 34.4k $198.9k | Added +9.5k |
| TWO SIGMA ADVISERS, LP 0.00% of their portfolio | 34.3k $198.3k | Added +7.0k |
| ALGERT GLOBAL LLC 0.00% of their portfolio | 33.9k $196.2k | Reduced -2.0k |
| XTX Topco Ltd 0.02% of their portfolio | 33.5k $193.5k | New |
| Cubist Systematic Strategies, LLC 0.00% of their portfolio | 25.7k $148.5k | Reduced -131.6k |
| IQ EQ FUND MANAGEMENT (IRELAND) Ltd 0.02% of their portfolio | 25.2k $145.5k | Added +10.1k |
| STIFEL FINANCIAL CORP 0.00% of their portfolio | 25.0k $144.5k | Added +5.0k |
| ExodusPoint Capital Management, LP 0.00% of their portfolio | 23.1k $133.0k | New |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 22.9k $132.6k | Unchanged |
| Trexquant Investment LP 0.00% of their portfolio | 22.2k $128.1k | New |
| IEQ CAPITAL, LLC 0.00% of their portfolio | 22.0k $127.2k | Unchanged |
| Alpine Global Management, LLC 0.02% of their portfolio | 20.8k $120.4k | New |
| PRUDENTIAL FINANCIAL INC 0.00% of their portfolio | 18.4k $106.1k | Unchanged |
| Engineers Gate Manager LP 0.00% of their portfolio | 17.3k $100.3k | Reduced -12.5k |
| Parallel Advisors, LLC 0.00% of their portfolio | 16.5k $95.5k | Unchanged |
| China Universal Asset Management Co., Ltd. 0.01% of their portfolio | 15.0k $86.6k | New |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 14.6k $84.1k | Reduced -1.9k |
| Schonfeld Strategic Advisors LLC 0.00% of their portfolio | 14.4k $83.0k | New |
| Invesco Ltd. 0.00% of their portfolio | 14.2k $82.0k | New |
| Focus Partners Wealth 0.00% of their portfolio | 13.5k $78.2k | Reduced -2.0k |
| Man Group plc 0.00% of their portfolio | 12.7k $73.5k | Reduced -29.7k |
| BOOTHBAY FUND MANAGEMENT, LLC 0.00% of their portfolio | 12.6k $72.6k | New |
| Walleye Capital LLC 0.00% of their portfolio | 11.8k $68.5k | Reduced -154.9k |
| Prime Capital Investment Advisors, LLC 0.00% of their portfolio | 11.8k $68.0k | Reduced -14.9k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.00% of their portfolio | 11.5k $66.4k | Reduced -16.0k |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 11.1k $64.2k | First filing |
| SG Americas Securities, LLC 0.00% of their portfolio | 10.8k $63.0k | New |
| Olympiad Research LP 0.06% of their portfolio | 10.3k $59.4k | New |
| Pathstone Holdings, LLC 0.00% of their portfolio | 10.2k $59.1k | Reduced -4.7k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 5.9k $33.8k | Added +5.5k |
| Point72 Asia (Singapore) Pte. Ltd. 0.01% of their portfolio | 4.9k $28.2k | New |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 3.7k $21.4k | Unchanged |
| Mirae Asset Global Investments Co., Ltd. 0.00% of their portfolio | 2.4k $13.8k | New |
| GROUP ONE TRADING LLC 0.00% of their portfolio | 2.3k $13.2k | New |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 2.0k $11.3k | Unchanged |
| GF FUND MANAGEMENT CO. LTD. 0.00% of their portfolio | 1.5k $8.6k | First filing |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO 0.00% of their portfolio | 1.2k $7.1k | Reduced -6.0k |
| WR Wealth Planners, LLC 0.00% of their portfolio | 1.2k $6.9k | Unchanged |
| US BANCORP \DE\ 0.00% of their portfolio | 1.0k $5.8k | Reduced -3.6k |
| Ancora Advisors LLC 0.00% of their portfolio | 800 $4.6k | Unchanged |
| Caitong International Asset Management Co., Ltd 0.00% of their portfolio | 688 $4.0k | First filing |
| Point72 (DIFC) Ltd 0.00% of their portfolio | 531 $3.1k | New |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 522 $3.0k | Added +279 |