Personalis, Inc.
PSNL- Exchange
- Nasdaq
- Industry
- Services-Medical Laboratories
- SEC CIK
- 0001527753
In the last 90 days, Personalis, Inc. insiders filed 0 open-market purchases and 6 sales; 158 institutions reported holding it in 13F filings for Q2 2026, worth $1.14B in total; ARK Invest is the only superinvestor holding it.
Holders of 5% or more of PSNL
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Personalis, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Merck & Co., Inc. | 13G | 16.50%14.0M shares | New | Dec 23, 20241 filing | Dec 23, 2024 | SEC |
| Tempus AI, Inc. | 13D/A | 12.60%13.2M shares | −1.90 ppfrom 14.50% | Sep 12, 20252 filings | Jul 21, 2026 | SEC |
| ARK Investment Management LLCSuperinvestorARK Invest | 13G/A | 8.14%7.19M shares | −1.45 ppfrom 9.59% | Jan 11, 20215 filings | May 14, 2025 | SEC |
| BlackRock, Inc. | 13G | 5.90%6.17M shares | +2.40 ppfrom 3.50% | Feb 5, 20252 filings | Jul 29, 2026 | SEC |
| Ameriprise Financial Inc | 13G/A | 5.80%6.09M shares | −1.30 ppfrom 7.10% | Feb 17, 20262 filings | Aug 14, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
26 Schedule 13D and 13G filings on Personalis, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Aug 14, 202610:08 AM ET | Ameriprise Financial Inc | 13G/A | 5.80%6.09M shares | −1.30 ppfrom 7.10% | Jun 30, 2026 | SEC |
| Aug 14, 20268:32 AM ET | Deep Track Capital, LPand 2 others | 13G/A | 3.82%4.00M shares | −1.69 ppfrom 5.51%Below 5% | Jun 30, 2026 | SEC |
| Jul 29, 20263:19 PM ET | BlackRock, Inc. | 13G | 5.90%6.17M shares | +2.40 ppfrom 3.50% | Jun 30, 2026 | SEC |
| Jul 21, 20264:05 PM ET | Tempus AI, Inc.and 1 other | 13D/A | 12.60%13.2M shares | −1.90 ppfrom 14.50% | Jul 19, 2026 | SEC |
| Jun 10, 20268:24 PM ET | Lightspeed Venture Partners Select IV, L.P.and 10 others | 13D/A | 2.00%2.08M shares | –Below 5% | Jun 8, 2026 | SEC |
| May 12, 20264:28 PM ET | Deep Track Capital, LPand 2 others | 13G | 5.51%5.76M shares | New | May 5, 2026 | SEC |
| Apr 8, 20263:26 PM ET | T. Rowe Price Investment Management, Inc. | 13G/A | 4.50%4.76M shares | −7.60 ppfrom 12.10%Below 5% | Mar 31, 2026 | SEC |
| Feb 17, 202610:28 AM ET | Ameriprise Financial Inc | 13G | 7.10%6.29M shares | New | Dec 31, 2025 | SEC |
| Jan 29, 20268:35 PM ET | Hirschman Orinand 1 other | 13G/A | 3.80%3.42M shares | −2.30 ppfrom 6.10%Below 5% | Dec 31, 2025 | SEC |
| Jan 8, 202612:15 PM ET | T. Rowe Price Investment Management, Inc. | 13G | 12.10%10.8M shares | New | Dec 31, 2025 | SEC |
| Sep 12, 20254:15 PM ET | Tempus AI, Inc.and 1 other | 13D/A | 14.50%12.9M shares | – | Sep 11, 2025 | SEC |
| May 14, 202510:39 AM ET | ARK Investment Management LLCand 1 otherSuperinvestorARK Invest | 13G/A | 8.14%7.19M shares | −1.45 ppfrom 9.59% | Mar 31, 2025 | SEC |
| Feb 14, 202511:23 AM ET | ARK Investment Management LLCSuperinvestorARK Invest | 13G/A | 9.59%6.78M shares | −1.16 ppfrom 10.75% | Dec 31, 2024 | SEC |
| Feb 10, 20258:29 AM ET | Hirschman Orinand 1 other | 13G/A | 6.10%4.29M shares | – | Dec 31, 2024 | SEC |
| Feb 5, 20255:28 PM ET | BlackRock, Inc. | 13G/A | 3.50%2.96M shares | –Below 5% | Dec 31, 2024 | SEC |
| Jan 10, 20259:20 PM ET | ARK Investment Management LLCSuperinvestorARK Invest | 13G/A | 10.75%7.09M shares | – | Sep 30, 2024 | SEC |
| Dec 23, 20247:32 AM ET | Merck & Co., Inc.and 1 other | 13G | 16.50%14.0M shares | New | Dec 19, 2024 | SEC |
| Feb 10, 2023 | ARK Investment Management LLCSuperinvestorARK Invest | 13G/AOld format | – | – | – | SEC |
| Jan 31, 20231:58 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Jan 25, 2023 | JPMorgan Chase & Co | 13G/AOld format | – | – | – | SEC |
| Mar 9, 20225:18 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Mar 7, 2022 | Lightspeed Venture Partners VIII LP | 13D/AOld format | – | – | – | SEC |
| Feb 9, 2022 | ARK Investment Management LLCSuperinvestorARK Invest | 13G/AOld format | – | – | – | SEC |
| Feb 3, 20224:41 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Jan 14, 2022 | JPMorgan Chase & Co | 13G/AOld format | – | – | – | SEC |
| Feb 16, 2021 | Abingworth LLP | 13G/AOld format | – | – | – | SEC |
| Feb 2, 20212:56 PM ET | BlackRock Inc. | 13GOld format | – | New | – | SEC |
| Jan 15, 2021 | JPMorgan Chase & Co | 13GOld format | – | New | – | SEC |
| Jan 11, 2021 | ARK Investment Management LLCSuperinvestorARK Invest | 13G/AOld format | – | – | – | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Personalis, Inc. shares.
No Form 144 notices for Personalis, Inc. are on file.