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. Holder counts are more reliable. Shares outstanding: 46.7m as of 2023-02-14, 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 ≈ $1.98. Options: 2 managers hold calls ($2.4k notional), 3 hold puts ($35.5k).
Trends to Q4 2022
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 81 |
| Q4 2022 | 81 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2022 | $136.0k | $63.0k | 0.46 |
| Q4 2022 | $2.4k | $35.5k | 14.94 |
Biggest buyers
| BlackRock Inc. | Added | +273.4k |
| ACADIAN ASSET MANAGEMENT LLC | Added | +258.5k |
| D. E. Shaw & Co., Inc. | Added | +257.3k |
| BANK OF MONTREAL /CAN/ | New | +139.8k |
| Man Group plc | New | +138.2k |
| 272 Capital LP | New | +125.7k |
| Anson Funds Management LP | New | +105.0k |
| UBS Group AG | Added | +100.5k |
| Wellington Shields & Co., LLC | Added | +86.9k |
| Prosight Management, LP | New | +58.7k |
Biggest sellers
| MILLENNIUM MANAGEMENT LLC | Reduced | -630.3k |
| Swedbank AB | Sold out | -400.2k |
| JPMORGAN CHASE & CO | Reduced | -270.2k |
| MARSHALL WACE, LLP | Reduced | -215.7k |
| MORGAN STANLEY | Reduced | -134.5k |
| Mirae Asset Global Investments Co., Ltd. | Sold out | -115.0k |
| Wellington Shields Capital Management, LLC | Reduced | -112.2k |
| JACOBS LEVY EQUITY MANAGEMENT, INC | Reduced | -74.8k |
| GABELLI FUNDS LLC | Sold out | -72.2k |
| CAXTON ASSOCIATES LP | Reduced | -61.7k |
Biggest calls
| GROUP ONE TRADING LLC | Added | $2.4k1.2k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| CITADEL ADVISORS LLC | Added | $30.5k15.4k shares |
| SIMPLEX TRADING, LLC | Reduced | $5.0k2.7k 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 2022
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 2021 | 0 | — | 0 | — | — |
| Q2 2021 | 0 | — | 0 | — | — |
| Q3 2021 | 0 | — | 0 | — | — |
| Q4 2021 | 0 | — | 3 | $4.8m | — |
| Q1 2022 | 0 | — | 3 | — | — |
| Q2 2022 | 0 | — | 4 | $113.9k | — |
| Q3 2022 | 0 | — | 2 | $35.3k | — |
| Q4 2022 | 0 | — | 3 | $58.5k | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2022-12-20 | Tachibana Aaron Chief Financial Officer | Sold | $7.4k3.8k shares |
| 2022-12-20 | Chen Richard Chief Medical Officer | Sold | $3.4k1.8k shares |
| 2022-12-15 | Chen Richard Chief Medical Officer | Sold | $17.9k7.2k shares |
| 2022-12-15 | Tachibana Aaron Chief Financial Officer | Sold | $17.9k7.2k shares |
| 2022-12-15 | Moore Stephen Michael General Counsel | Sold | $4.8k1.9k shares |
| 2022-12-02 | Tachibana Aaron Chief Financial Officer | Sold | $11.3k4.4k shares |
| 2022-12-02 | Chen Richard Chief Medical Officer | Sold | $1.1k440 shares |
| 2022-11-16 | Moore Stephen Michael General Counsel | Sold | $5.5k2.0k shares |
| 2022-11-16 | Chen Richard Chief Medical Officer | Sold | $3.5k1.3k shares |
| 2022-11-16 | Tachibana Aaron Chief Financial Officer | Sold | $3.5k1.3k 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 2022
| Manager | Shares | Change |
|---|---|---|
| ARK Investment Management LLC 0.09% of their portfolio | 5.5m $10.9m | Added +53.9k |
| BlackRock Inc. 0.00% of their portfolio | 3.6m $7.0m | Added +273.4k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 3.5m $6.9m | Reduced -270.2k |
| VANGUARD GROUP INC 0.00% of their portfolio | 2.0m $4.0m | Reduced -28.9k |
| Alyeska Investment Group, L.P. 0.02% of their portfolio | 1.2m $2.3m | Added +50.9k |
| Wellington Shields & Co., LLC 0.46% of their portfolio | 1.0m $2.0m | Added +86.9k |
| Sumitomo Mitsui Trust Group, Inc. 0.00% of their portfolio | 889.9k $1.8m | Reduced -60.2k |
| Amova Asset Management Americas, Inc. 0.03% of their portfolio | 889.9k $1.8m | Reduced -60.2k |
| Wellington Shields Capital Management, LLC 0.21% of their portfolio | 863.1k $1.7m | Reduced -112.2k |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 857.6k $1.7m | Reduced -630.3k |
| D. E. Shaw & Co., Inc. 0.00% of their portfolio | 735.2k $1.5m | Added +257.3k |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 642.9k $1.3m | Reduced -45.4k |
| ACADIAN ASSET MANAGEMENT LLC 0.01% of their portfolio | 538.9k $1.1m | Added +258.5k |
| STATE OF MICHIGAN RETIREMENT SYSTEM 0.01% of their portfolio | 443.8k $878.7k | Unchanged |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 368.3k $729.0k | Added +6.4k |
| Monarch Partners Asset Management LLC 0.19% of their portfolio | 321.4k $636.4k | Added +2.3k |
| Pacific Heights Asset Management LLC 0.06% of their portfolio | 310.0k $613.8k | Unchanged |
| TWO SIGMA ADVISERS, LP 0.00% of their portfolio | 290.5k $575.2k | Reduced -19.6k |
| UBS Group AG 0.00% of their portfolio | 261.3k $517.3k | Added +100.5k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 236.2k $467.6k | Added +27.9k |
| MARSHALL WACE, LLP 0.00% of their portfolio | 221.8k $439.2k | Reduced -215.7k |
| FRED ALGER MANAGEMENT, LLC 0.00% of their portfolio | 209.1k $414.0k | Reduced -15 |
| JACOBS LEVY EQUITY MANAGEMENT, INC 0.00% of their portfolio | 201.2k $398.4k | Reduced -74.8k |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 159.4k $315.0k | Added +52.0k |
| GSA CAPITAL PARTNERS LLP 0.04% of their portfolio | 156.6k $310.0k | Added +5.9k |
| BANK OF MONTREAL /CAN/ 0.00% of their portfolio | 139.8k $278.2k | New |
| Man Group plc 0.00% of their portfolio | 138.2k $273.7k | New |
| LPL Financial LLC 0.00% of their portfolio | 137.8k $272.9k | Added +58.0k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 127.8k $253.0k | Added +18.3k |
| 272 Capital LP 0.11% of their portfolio | 125.7k $248.8k | New |
| STATE STREET CORP 0.00% of their portfolio | 118.1k $233.9k | Unchanged |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 115.5k $228.7k | Unchanged |
| TUDOR INVESTMENT CORP ET AL 0.01% of their portfolio | 114.5k $227.0k | Added +23.9k |
| Anson Funds Management LP 0.05% of their portfolio | 105.0k $207.8k | New |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 89.2k $176.7k | Added +8.7k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 88.9k $176.0k | Unchanged |
| NORTHERN TRUST CORP 0.00% of their portfolio | 84.2k $166.7k | Reduced -373 |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 77.6k $153.0k | Added +1.7k |
| Green Alpha Advisors, LLC 0.11% of their portfolio | 66.6k $132.0k | Added +977 |
| MORGAN STANLEY 0.00% of their portfolio | 65.4k $129.5k | Reduced -134.5k |
| Prosight Management, LP 0.06% of their portfolio | 58.7k $116.2k | New |
| HSBC HOLDINGS PLC 0.00% of their portfolio | 53.2k $104.3k | Added +23.2k |
| BOOTHBAY FUND MANAGEMENT, LLC 0.00% of their portfolio | 51.1k $101.2k | New |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 51.0k $100.9k | Reduced -54.0k |
| Bruce & Co., Inc. 0.03% of their portfolio | 50.0k $99.0k | New |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 48.1k $95.3k | Added +12.5k |
| BARCLAYS PLC 0.00% of their portfolio | 45.0k $89.1k | First filing |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 44.3k $87.7k | Added +28.7k |
| Ergoteles LLC 0.00% of their portfolio | 38.0k $75.2k | New |
| PATHSTONE FAMILY OFFICE, LLC 0.00% of their portfolio | 34.6k $68.5k | Reduced -912 |
| Cubist Systematic Strategies, LLC 0.00% of their portfolio | 28.7k $56.8k | Reduced -6.4k |
| Board of Trustees of The Leland Stanford Junior University 0.01% of their portfolio | 25.3k $50.0k | Unchanged |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 25.1k $49.6k | Reduced -6.4k |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 24.9k $49.2k | Added +13.6k |
| CAXTON ASSOCIATES LP 0.00% of their portfolio | 24.5k $48.6k | Reduced -61.7k |
| Connor, Clark & Lunn Investment Management Ltd. 0.00% of their portfolio | 23.0k $45.5k | Reduced -41.5k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 22.9k $45.4k | New |
| IEQ CAPITAL, LLC 0.00% of their portfolio | 22.0k $43.6k | Unchanged |
| ALGERT GLOBAL LLC 0.00% of their portfolio | 20.3k $40.1k | Reduced -36.6k |
| HOWLAND CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 20.2k $40.0k | Unchanged |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO 0.00% of their portfolio | 16.9k $34.0k | Reduced -8.6k |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 16.8k $34.0k | Reduced -11.6k |
| Parallel Advisors, LLC 0.00% of their portfolio | 16.5k $32.7k | Unchanged |
| HoyleCohen, LLC 0.00% of their portfolio | 15.4k $30.4k | Unchanged |
| Engineers Gate Manager LP 0.00% of their portfolio | 15.2k $30.0k | New |
| Bank of New York Mellon Corp 0.00% of their portfolio | 15.0k $29.7k | Reduced -2.5k |
| PRELUDE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 12.1k $23.9k | Reduced -3.4k |
| Orion Porfolio Solutions, LLC 0.00% of their portfolio | 10.4k $20.7k | New |
| FMR LLC 0.00% of their portfolio | 8.9k $17.6k | New |
| Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% of their portfolio | 6.6k $13.0k | Reduced -33 |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 3.5k $7.1k | Added +691 |
| FEDERATED HERMES, INC. 0.00% of their portfolio | 3.0k $5.9k | Added +1.4k |
| SIMPLEX TRADING, LLC 0.00% of their portfolio | 2.3k $4.0k | Reduced -15.6k |
| Quantbot Technologies LP 0.00% of their portfolio | 1.1k $2.3k | New |
| CITIGROUP INC 0.00% of their portfolio | 578 $1.1k | Added +28 |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 570 $1.1k | Added +203 |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 257 $509 | Reduced -4.9k |
| IFP Advisors, Inc 0.00% of their portfolio | 124 $4.0k | New |
| Steward Partners Investment Advisory, LLC 0.00% of their portfolio | 100 $198 | Unchanged |
| Financial Gravity Asset Management, Inc. 0.00% of their portfolio | 2 $8 | New |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. 0.00% of their portfolio | 0 $0 | Unchanged |