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: 49.0m as of 2023-10-30, 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 ≈ $2.10. Options: 3 managers hold calls ($21.2k notional), 2 hold puts ($0).
Trends to Q4 2023
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 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q4 2022 | 41 | 42 |
| Q1 2023 | 33 | 40 |
| Q2 2023 | 25 | 31 |
| Q3 2023 | 18 | 34 |
| Q4 2023 | 32 | 26 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q1 2023 | $167.5k | $24.8k | 0.15 |
| Q2 2023 | $3.8k | $6.6k | 1.75 |
| Q3 2023 | $0 | $1.2k | — |
| Q4 2023 | $21.2k | $0 | 0.00 |
Biggest buyers
| ARK Investment Management LLC | Added | +952.1k |
| CITADEL ADVISORS LLC | Added | +309.8k |
| RENAISSANCE TECHNOLOGIES LLC | Added | +288.3k |
| GSA CAPITAL PARTNERS LLP | Added | +258.3k |
| MILLENNIUM MANAGEMENT LLC | Added | +152.0k |
| MARSHALL WACE, LLP | New | +151.7k |
| Bruce & Co., Inc. | Added | +150.0k |
| ACADIAN ASSET MANAGEMENT LLC | Added | +145.0k |
| MORGAN STANLEY | Added | +139.5k |
| XTX Topco Ltd | New | +119.4k |
Biggest sellers
| JPMORGAN CHASE & CO | Reduced | -3.5m |
| Alyeska Investment Group, L.P. | Sold out | -1.2m |
| Wellington Shields & Co., LLC | Reduced | -310.2k |
| Wellington Shields Capital Management, LLC | Reduced | -179.9k |
| DIMENSIONAL FUND ADVISORS LP | Reduced | -109.8k |
| JACOBS LEVY EQUITY MANAGEMENT, INC | Reduced | -109.1k |
| AMERIPRISE FINANCIAL INC | Sold out | -108.7k |
| Man Group plc | Sold out | -106.4k |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | Reduced | -25.0k |
| TWO SIGMA INVESTMENTS, LP | Sold out | -21.6k |
Biggest calls
| GROUP ONE TRADING LLC | New | $19.3k9.2k shares |
| CITADEL ADVISORS LLC | New | $1.9k900 shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
| SIMPLEX TRADING, LLC | New | $0100 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 2023
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 2022 | 0 | — | 3 | — | — |
| Q2 2022 | 0 | — | 4 | $113.9k | — |
| Q3 2022 | 0 | — | 2 | $35.3k | — |
| Q4 2022 | 0 | — | 3 | $58.5k | — |
| Q1 2023 | 0 | — | 2 | $17.8k | — |
| Q2 2023 | 0 | — | 3 | $47.3k | — |
| Q3 2023 | 0 | — | 2 | $2.6k | — |
| Q4 2023 | 0 | — | 4 | $42.2k | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2023-12-15 | Tachibana Aaron CFO and COO | Sold | $9.9k6.7k shares |
| 2023-12-15 | Chen Richard Chief Medical Officer and EVP | Sold | $6.9k4.7k shares |
| 2023-12-15 | Moore Stephen Michael General Counsel | Sold | $2.2k1.5k shares |
| 2023-11-16 | Moore Stephen Michael General Counsel | Sold | $1.8k1.7k shares |
| 2023-11-16 | Tachibana Aaron CFO and COO | Sold | $1.4k1.3k shares |
| 2023-11-16 | Chen Richard Chief Medical Officer and EVP | Sold | $978940 shares |
| 2023-11-01 | Hall Christopher M President and CEO, director | Sold | $19.0k20.5k 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 2023
| Manager | Shares | Change |
|---|---|---|
| ARK Investment Management LLC 0.08% of their portfolio | 6.7m $14.0m | Added +952.1k |
| BlackRock Inc. 0.00% of their portfolio | 3.3m $7.0m | Reduced -14.6k |
| VANGUARD GROUP INC 0.00% of their portfolio | 2.1m $4.3m | Added +4.5k |
| Sumitomo Mitsui Trust Group, Inc. 0.00% of their portfolio | 1.1m $2.3m | Unchanged |
| Amova Asset Management Americas, Inc. 0.02% of their portfolio | 1.1m $2.3m | Unchanged |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 840.8k $1.8m | Added +288.3k |
| ACADIAN ASSET MANAGEMENT LLC 0.00% of their portfolio | 520.2k $1.1m | Added +145.0k |
| Wellington Shields Capital Management, LLC 0.13% of their portfolio | 477.8k $1.0m | Reduced -179.9k |
| D. E. Shaw & Co., Inc. 0.00% of their portfolio | 465.2k $977.0k | Added +78.9k |
| STATE OF MICHIGAN RETIREMENT SYSTEM 0.01% of their portfolio | 443.8k $932.0k | Unchanged |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 432.1k $907.5k | Added +309.8k |
| GSA CAPITAL PARTNERS LLP 0.07% of their portfolio | 395.6k $831.0k | Added +258.3k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 389.7k $818.6k | Added +17.8k |
| JACOBS LEVY EQUITY MANAGEMENT, INC 0.00% of their portfolio | 335.8k $705.3k | Reduced -109.1k |
| Pacific Heights Asset Management LLC 0.06% of their portfolio | 310.0k $651.0k | Unchanged |
| Bruce & Co., Inc. 0.22% of their portfolio | 300.0k $630.0k | Added +150.0k |
| Wellington Shields & Co., LLC 0.23% of their portfolio | 294.1k $617.6k | Reduced -310.2k |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 266.9k $560.5k | Added +152.0k |
| MORGAN STANLEY 0.00% of their portfolio | 246.7k $518.2k | Added +139.5k |
| LPL Financial LLC 0.00% of their portfolio | 193.0k $405.2k | Reduced -1.2k |
| MARSHALL WACE, LLP 0.00% of their portfolio | 151.7k $318.5k | New |
| STATE STREET CORP 0.00% of their portfolio | 130.2k $273.5k | Unchanged |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 129.5k $271.9k | Reduced -25.0k |
| XTX Topco Ltd 0.05% of their portfolio | 119.4k $250.8k | New |
| Green Alpha Advisors, LLC 0.18% of their portfolio | 119.3k $250.5k | Reduced -7.9k |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 107.6k $226.1k | Reduced -109.8k |
| TWO SIGMA ADVISERS, LP 0.00% of their portfolio | 106.3k $223.2k | Reduced -17.3k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 98.6k $207.0k | Added +12.0k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 94.2k $198.0k | Added +18.3k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 94.0k $197.5k | Added +49.2k |
| Quadrature Capital Ltd 0.00% of their portfolio | 73.0k $152.2k | New |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 60.1k $127.0k | Unchanged |
| Bank of New York Mellon Corp 0.00% of their portfolio | 59.5k $125.0k | Added +31.5k |
| Man Group plc 0.00% of their portfolio | 56.5k $118.7k | New |
| HSBC HOLDINGS PLC 0.00% of their portfolio | 45.5k $92.7k | Unchanged |
| BARCLAYS PLC 0.00% of their portfolio | 45.0k $94.6k | Unchanged |
| Squarepoint Ops LLC 0.00% of their portfolio | 44.2k $92.8k | Added +31.9k |
| HOWLAND CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 42.8k $90.0k | Added +5.0k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 39.4k $82.7k | New |
| Pathstone Holdings, LLC 0.00% of their portfolio | 36.4k $76.4k | First filing |
| PRUDENTIAL FINANCIAL INC 0.00% of their portfolio | 28.1k $59.1k | Unchanged |
| Prime Capital Investment Advisors, LLC 0.00% of their portfolio | 27.8k $58.3k | Reduced -1.6k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 22.9k $48.2k | Unchanged |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 22.2k $46.7k | Reduced -1.6k |
| Board of Trustees of The Leland Stanford Junior University 0.00% of their portfolio | 22.1k $46.4k | Reduced -3.2k |
| IEQ CAPITAL, LLC 0.00% of their portfolio | 22.0k $46.2k | Unchanged |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 19.4k $40.8k | New |
| Parallel Advisors, LLC 0.00% of their portfolio | 16.5k $34.7k | Unchanged |
| HoyleCohen, LLC 0.00% of their portfolio | 15.4k $32.3k | Unchanged |
| Connor, Clark & Lunn Investment Management Ltd. 0.00% of their portfolio | 15.1k $31.7k | New |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 13.5k $28.4k | Reduced -49 |
| Scientech Research LLC 0.02% of their portfolio | 11.5k $23.9k | First filing |
| Cubist Systematic Strategies, LLC 0.00% of their portfolio | 11.1k $23.3k | New |
| HRT FINANCIAL LP 0.00% of their portfolio | 10.7k $22.0k | Reduced -7.7k |
| Baader Bank Aktiengesellschaft 0.00% of their portfolio | 10.7k $16.7k | New |
| UBS Group AG 0.00% of their portfolio | 10.2k $21.5k | Reduced -10.4k |
| Banque Cantonale Vaudoise 0.00% of their portfolio | 10.0k $21.0k | New |
| Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% of their portfolio | 5.2k $10.9k | Reduced -423 |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 4.2k $8.8k | Reduced -2.5k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 3.7k $7.8k | Unchanged |
| Qube Research & Technologies Ltd 0.00% of their portfolio | 3.1k $6.5k | Added +3.1k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 1.8k $3.7k | Reduced -3.5m |
| SIMPLEX TRADING, LLC 0.00% of their portfolio | 513 $1.0k | New |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 302 $634 | Added +19 |
| COMERICA BANK 0.00% of their portfolio | 283 $594 | Added +78 |
| PRINCIPAL SECURITIES, INC. 0.00% of their portfolio | 250 $525 | First filing |
| FMR LLC 0.00% of their portfolio | 220 $462 | New |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 135 $284 | Unchanged |
| GROUP ONE TRADING LLC 0.00% of their portfolio | 1 $2 | Unchanged |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. 0.00% of their portfolio | 0 $0 | Unchanged |