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 ≈ $5.38. Options: 5 managers hold calls ($182.6k notional), 4 hold puts ($459.5k).
Trends to Q3 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 |
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 |
| Q1 2024 | 35 | 29 |
| Q2 2024 | 18 | 39 |
| Q3 2024 | 40 | 36 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q4 2023 | $21.2k | $0 | 0.00 |
| Q1 2024 | $4.2k | $745 | 0.18 |
| Q2 2024 | $34.5k | $0 | 0.00 |
| Q3 2024 | $182.6k | $459.5k | 2.52 |
Biggest buyers
| AIGH Capital Management LLC | New | +4.0m |
| MILLENNIUM MANAGEMENT LLC | Added | +2.3m |
| Blue Water Life Science Advisors, LP | New | +1.0m |
| ARK Investment Management LLC | Added | +723.6k |
| MARSHALL WACE, LLP | Added | +347.1k |
| BANK OF AMERICA CORP /DE/ | Added | +227.5k |
| Walleye Capital LLC | New | +166.8k |
| Cubist Systematic Strategies, LLC | New | +157.2k |
| Informed Momentum Co LLC | New | +143.4k |
| Qube Research & Technologies Ltd | Added | +130.7k |
Biggest sellers
| ACADIAN ASSET MANAGEMENT LLC | Reduced | -549.8k |
| JACOBS LEVY EQUITY MANAGEMENT, INC | Reduced | -329.3k |
| CITADEL ADVISORS LLC | Reduced | -320.3k |
| GSA CAPITAL PARTNERS LLP | Reduced | -302.8k |
| D. E. Shaw & Co., Inc. | Sold out | -195.4k |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | -98.2k |
| Sumitomo Mitsui Trust Group, Inc. | Reduced | -92.8k |
| Amova Asset Management Americas, Inc. | Reduced | -92.8k |
| UBS Group AG | Reduced | -80.9k |
| Balyasny Asset Management L.P. | Sold out | -65.9k |
Biggest calls
| CITADEL ADVISORS LLC | Reduced | $90.9k16.9k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | New | $57.0k10.6k shares |
| SIMPLEX TRADING, LLC | Added | $26.0k5.0k shares |
| GROUP ONE TRADING LLC | Reduced | $8.6k1.6k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| CITADEL ADVISORS LLC | New | $343.2k63.8k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | New | $116.2k21.6k shares |
| 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)
Insider purchases and sales in Q3 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 |
|---|---|---|---|---|---|
| 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 | — |
| Q1 2024 | 1 | $16.7k | 2 | $1.7k | — |
| Q2 2024 | 0 | — | 3 | $29.5k | — |
| Q3 2024 | 0 | — | 2 | $3.8k | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2024-08-16 | Tempus AI, Inc. 10% owner | Bought | $17.7m3.5m shares |
| 2024-07-30 | Tachibana Aaron CFO AND COO | Sold | $2.2k742 shares |
| 2024-07-30 | Chen Richard CHIEF MEDICAL OFFICER AND EVP | Sold | $1.6k524 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, Q3 2024
| Manager | Shares | Change |
|---|---|---|
| ARK Investment Management LLC 0.35% of their portfolio | 7.1m $38.1m | Added +723.6k |
| AIGH Capital Management LLC 10.07% of their portfolio | 4.0m $21.5m | New |
| BlackRock, Inc. 0.00% of their portfolio | 2.9m $15.7m | First filing |
| MILLENNIUM MANAGEMENT LLC 0.01% of their portfolio | 2.4m $13.1m | Added +2.3m |
| VANGUARD GROUP INC 0.00% of their portfolio | 2.0m $10.6m | Added +66.4k |
| Blue Water Life Science Advisors, LP 4.73% of their portfolio | 1.0m $5.4m | New |
| RENAISSANCE TECHNOLOGIES LLC 0.01% of their portfolio | 931.1k $5.0m | Reduced -98.2k |
| Sumitomo Mitsui Trust Group, Inc. 0.00% of their portfolio | 792.6k $4.3m | Reduced -92.8k |
| Amova Asset Management Americas, Inc. 0.05% of their portfolio | 792.6k $4.3m | Reduced -92.8k |
| ACADIAN ASSET MANAGEMENT LLC 0.01% of their portfolio | 508.1k $2.7m | Reduced -549.8k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 498.5k $2.7m | Added +83.1k |
| STATE OF MICHIGAN RETIREMENT SYSTEM 0.01% of their portfolio | 493.8k $2.7m | Unchanged |
| MARSHALL WACE, LLP 0.00% of their portfolio | 457.0k $2.5m | Added +347.1k |
| Wellington Shields Capital Management, LLC 0.40% of their portfolio | 432.2k $2.3m | Reduced -4.8k |
| JACOBS LEVY EQUITY MANAGEMENT, INC 0.01% of their portfolio | 405.7k $2.2m | Reduced -329.3k |
| Bruce & Co., Inc. 0.47% of their portfolio | 300.0k $1.6m | Unchanged |
| Wellington Shields & Co., LLC 0.48% of their portfolio | 292.5k $1.6m | Unchanged |
| HOWLAND CAPITAL MANAGEMENT LLC 0.06% of their portfolio | 262.6k $1.4m | Unchanged |
| PERKINS CAPITAL MANAGEMENT INC 1.30% of their portfolio | 257.3k $1.4m | Unchanged |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 243.0k $1.3m | Added +227.5k |
| STATE STREET CORP 0.00% of their portfolio | 175.1k $942.3k | Added +44.9k |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 167.9k $903.4k | Added +92.6k |
| Walleye Capital LLC 0.01% of their portfolio | 166.8k $897.3k | New |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 164.3k $883.8k | Added +99.7k |
| Cubist Systematic Strategies, LLC 0.01% of their portfolio | 157.2k $845.9k | New |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 154.8k $832.6k | Added +16.2k |
| LPL Financial LLC 0.00% of their portfolio | 150.7k $810.7k | Reduced -40.5k |
| Informed Momentum Co LLC 0.12% of their portfolio | 143.4k $771.5k | New |
| Qube Research & Technologies Ltd 0.00% of their portfolio | 130.8k $703.6k | Added +130.7k |
| GSA CAPITAL PARTNERS LLP 0.05% of their portfolio | 124.1k $668.0k | Reduced -302.8k |
| MORGAN STANLEY 0.00% of their portfolio | 108.8k $585.5k | Reduced -17.6k |
| Connor, Clark & Lunn Investment Management Ltd. 0.00% of their portfolio | 108.8k $585.3k | Added +54.0k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 95.0k $512.0k | Unchanged |
| NORTHERN TRUST CORP 0.00% of their portfolio | 93.4k $502.7k | Added +37.3k |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 85.6k $460.5k | Reduced -50.0k |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 78.3k $421.0k | New |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 77.5k $418.0k | Added +1.6k |
| CITIGROUP INC 0.00% of their portfolio | 75.8k $408.1k | New |
| Centiva Capital, LP 0.02% of their portfolio | 70.6k $379.9k | New |
| Semanteon Capital Management, LP 0.26% of their portfolio | 69.6k $374.6k | New |
| Green Alpha Advisors, LLC 0.28% of their portfolio | 65.5k $352.4k | Reduced -43.1k |
| BARCLAYS PLC 0.00% of their portfolio | 65.5k $352.2k | Added +20.4k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 42.5k $228.6k | Reduced -2.3k |
| Man Group plc 0.00% of their portfolio | 42.4k $228.1k | Reduced -60.0k |
| HSBC HOLDINGS PLC 0.00% of their portfolio | 40.9k $218.1k | Reduced -4.5k |
| Quantbot Technologies LP 0.01% of their portfolio | 39.0k $209.6k | New |
| ALGERT GLOBAL LLC 0.01% of their portfolio | 36.0k $193.5k | New |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 35.0k $188.2k | Reduced -320.3k |
| Engineers Gate Manager LP 0.00% of their portfolio | 29.8k $160.4k | New |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.00% of their portfolio | 27.5k $147.7k | New |
| TWO SIGMA ADVISERS, LP 0.00% of their portfolio | 27.3k $146.9k | Reduced -61.1k |
| Prime Capital Investment Advisors, LLC 0.00% of their portfolio | 26.6k $143.2k | Reduced -1.0k |
| AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio | 25.3k $136.2k | New |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 24.9k $133.8k | Reduced -4.0k |
| AJOVista, LLC 0.56% of their portfolio | 24.5k $132.0k | New |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 22.9k $123.4k | Unchanged |
| IEQ CAPITAL, LLC 0.00% of their portfolio | 22.0k $118.4k | Unchanged |
| Graham Capital Management, L.P. 0.00% of their portfolio | 21.2k $114.2k | New |
| INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC 0.01% of their portfolio | 21.0k $3.9k | Added +17.1k |
| STIFEL FINANCIAL CORP 0.00% of their portfolio | 20.0k $107.6k | Reduced -10.0k |
| Jefferies Financial Group Inc. 0.00% of their portfolio | 19.4k $104.4k | New |
| PRUDENTIAL FINANCIAL INC 0.00% of their portfolio | 18.4k $98.7k | Reduced -15.4k |
| Squarepoint Ops LLC 0.00% of their portfolio | 17.0k $91.6k | New |
| Parallel Advisors, LLC 0.00% of their portfolio | 16.5k $88.9k | Unchanged |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 16.5k $88.8k | Reduced -2.1k |
| Focus Partners Wealth 0.00% of their portfolio | 15.5k $83.6k | New |
| Williams Jones Wealth Management, LLC. 0.00% of their portfolio | 15.5k $83.4k | New |
| IQ EQ FUND MANAGEMENT (IRELAND) Ltd 0.01% of their portfolio | 15.1k $81.3k | Added +4.5k |
| Pathstone Holdings, LLC 0.00% of their portfolio | 14.9k $80.2k | Reduced -20.6k |
| nVerses Capital, LLC 0.02% of their portfolio | 7.4k $39.8k | New |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO 0.00% of their portfolio | 7.2k $38.9k | Reduced -1.9k |
| UBS Group AG 0.00% of their portfolio | 7.1k $38.1k | Reduced -80.9k |
| US BANCORP \DE\ 0.00% of their portfolio | 4.6k $24.7k | Reduced -500 |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 3.7k $20.0k | Unchanged |
| Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% of their portfolio | 3.2k $17.2k | Reduced -1.1k |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 2.0k $10.5k | Unchanged |
| WR Wealth Planners, LLC 0.00% of their portfolio | 1.2k $6.5k | Unchanged |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 1.0k $5.6k | Reduced -25.5k |
| Ancora Advisors LLC 0.00% of their portfolio | 800 $4.3k | New |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 400 $2.2k | Unchanged |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 243 $1.3k | New |
| PRINCIPAL SECURITIES, INC. 0.00% of their portfolio | 195 $1.0k | Reduced -10 |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 135 $726 | Unchanged |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. 0.00% of their portfolio | 0 $0 | Unchanged |