As of November 6, 2026, Personalis, Inc. is a publicly traded company (Nasdaq: PSNL). The largest holder reporting an active stake on Schedule 13D is Tempus AI, Inc., at 12.6%. No bankruptcy or receivership appears in its SEC Form 8-K filings. Passive holders reporting on Schedule 13G include BlackRock (5.9%), Ameriprise (5.8%) (Schedule 13D/A, July 21, 2026).
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Is Personalis, Inc. a real, registered company?
- Personalis, Inc. files with the SEC under CIK 1527753 (its SEC filings).
- Its shares are listed under the ticker PSNL on Nasdaq (SEC company record).
- Incorporated in Delaware; business address in Fremont, California, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under Personalis, Inc. in our court records and SEC 8-K records (as of 2026-11-06).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Ameriprise (filed 2026-08-14).
Who are Personalis, Inc.'s owners and officers?
Personalis, Inc.: incorporated in Delaware; business address in Fremont, California; industry Services-Medical Laboratories (Schedule 13G/A, 2026-08-14).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-08-14 | Deep Track Capital, LP | 3.82% |
| Schedule 13G/A, 2026-08-14 | Ameriprise Financial, Inc. | 5.8% |
| Schedule 13G, 2026-07-29 | Blackrock, Inc. | 5.9% |
| Schedule 13D/A, 2026-07-21 | Tempus Ai, Inc. | 12.6% |
| Schedule 13D/A, 2026-06-10 | Lightspeed Venture Partners Select Iv, L.P. | 2% |
| Schedule 13G, 2026-05-12 | Deep Track Capital, LP | 5.51% |
| Schedule 13G/A, 2026-04-08 | T. Rowe Price Investment Management, Inc. | 4.5% |
| Schedule 13G, 2026-02-17 | Ameriprise Financial, Inc. | 7.1% |
| Schedule 13G/A, 2026-01-29 | Orin Hirschman | 3.8% |
| Schedule 13G, 2026-01-08 | T. Rowe Price Investment Management, Inc. | 12.1% |
| Schedule 13D/A, 2025-09-12 | Tempus Ai, Inc. | 14.5% |
Questions about who owns Personalis, Inc.
Who owns Personalis, Inc.?
On this page, 3 holders' latest ownership filings report 5% or more of Personalis, Inc.: Tempus Ai, Inc. (12.6%, Schedule 13D/A, filed 2026-07-21), Blackrock, Inc. (5.9%, Schedule 13G, filed 2026-07-29) and Ameriprise Financial, Inc. (5.8%, Schedule 13G/A, filed 2026-08-14).
Who are the largest shareholders of Personalis, Inc.?
By the share each holder's latest filing reports, the largest holders of Personalis, Inc. on this page are Tempus Ai, Inc. (12.6%), Blackrock, Inc. (5.9%) and Ameriprise Financial, Inc. (5.8%).
When did Tempus Ai, Inc. buy into Personalis, Inc.?
The filings give report dates, not purchase dates. The earliest filing from Tempus Ai, Inc. on this page is the Schedule 13D/A, filed 2025-09-12, reporting 14.5%; its latest, Schedule 13D/A filed 2026-07-21, reports 12.6%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 11 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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What the Full Report on Personalis, Inc. covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
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Which insiders own Personalis, Inc. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- Merck & Co., Inc., a 10% owner: 14,044,943 shares (13.0% of shares outstanding), held indirectly (the form names the holder only in its footnotes), on a joint filing (Form 3, 2024-12-23).
- Merck Sharp & Dohme LLC, a 10% owner: 14,044,943 shares (13.0% of shares outstanding), held indirectly (the form names the holder only in its footnotes), on a joint filing (Form 3, 2024-12-23).
- , Inc., a 10% owner: 13,039,067 shares (12.0% of shares outstanding) (Form 4, 2026-02-13).
- , the chief executive and a director: 199,415 shares (0.18% of shares outstanding) (Form 4, 2026-11-04).
- , the chief operating officer and chief financial officer: 195,902 shares (0.18% of shares outstanding) (Form 4, 2026-09-22).
Shares outstanding: 108,403,814 as of 2026-10-30, from the company's latest SEC cover page.
How much has Personalis, Inc. raised?
No fundraising or offering filing from Personalis, Inc. is on file with us.
Keep reading
More on Personalis, Inc. and the records around it.
Personalis, Inc. elsewhere on the record
- 5%+ stake filings Aug 2026
Companies that share a holder
- Orin Hirschman also filed stake reports on 46 other companies: ASPEN AEROGELS, INC. (Oct 2026), Bionano Genomics, Inc. (Oct 2026), FENNEC PHARMACEUTICALS INC. (Oct 2026)
- Deep Track Capital, LP also filed stake reports on 59 other companies: Alector, Inc. (Oct 2026), TCGX Acquisition Corp. II (Oct 2026), Frazier Life Sciences Acquisition Corp. II (Oct 2026)
- Ameriprise Financial, Inc. also filed stake reports on 65 other companies: Universal Electronics Inc. (Sep 2026), America's Car-Mart, Inc. (Aug 2026), Ampco-Pittsburgh Corporation (Aug 2026)
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