As of November 6, 2026, Sera Prognostics, Inc. is a publicly traded company (Nasdaq: SERA); its largest reported holder is Whetstone Capital Advisors, LLC, with 8.6% on Schedule 13G/A of May 1, 2026, then Aberdeen Group plc (7.21%) (Schedule 13G/A, May 1, 2026).
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Is Sera Prognostics, Inc. a real, registered company?
- Sera Prognostics, Inc. files with the SEC under CIK 1534969 (its SEC filings).
- Its shares are listed under the ticker SERA on Nasdaq (SEC company record).
- Incorporated in Delaware; business address in Salt Lake City, Utah, 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 SERA PROGNOSTICS, INC. in our court records and SEC 8-K records (as of 2026-11-06).
- Leadership changes: the latest reported is Scott Gleason, Chief Financial Officer (Form 8-K filed 2026-08-19). Check you are dealing with the people now in charge.
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Aberdeen Group plc (filed 2026-07-15).
Who are Sera Prognostics, Inc.'s owners and officers?
Sera Prognostics, Inc.: incorporated in Delaware; business address in Salt Lake City, Utah; industry Services-Medical Laboratories (Form D, 2026-08-19).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-07-15 | Aberdeen Group PLC | 7.21% |
| Schedule 13G/A, 2026-05-01 | Whetstone Capital Advisors, LLC | 8.6% |
| Schedule 13G/A, 2026-01-16 | Whetstone Capital Advisors, LLC | 9.2% |
| Schedule 13G, 2025-09-08 | Whetstone Capital Advisors, LLC | 9.9% |
| Schedule 13G/A, 2025-08-14 | Ra Capital Management, L.P. | 0% |
| Schedule 13G, 2025-08-05 | Aberdeen Group PLC | 6.07% |
Questions about who owns Sera Prognostics, Inc.
Who owns Sera Prognostics, Inc.?
On this page, 2 holders' latest ownership filings report 5% or more of Sera Prognostics, Inc.: Whetstone Capital Advisors, LLC (8.6%, Schedule 13G/A, filed 2026-05-01) and Aberdeen Group PLC (7.21%, Schedule 13G/A, filed 2026-07-15).
Who are the largest shareholders of Sera Prognostics, Inc.?
By the share each holder's latest filing reports, the largest holders of Sera Prognostics, Inc. on this page are Whetstone Capital Advisors, LLC (8.6%) and Aberdeen Group PLC (7.21%).
When did Whetstone Capital Advisors, LLC buy into Sera Prognostics, Inc.?
The filings give report dates, not purchase dates. The earliest filing from Whetstone Capital Advisors, LLC on this page is the Schedule 13G, filed 2025-09-08, reporting 9.9%; its latest, Schedule 13G/A filed 2026-05-01, reports 8.6%.
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%); 6 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 Sera Prognostics, 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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| Filed | Person | Role | Change | Effective |
|---|---|---|---|---|
| Form 8-K, 2026-08-19 | Scott Gleason | Chief Financial Officer | appointed | 2026-08-31 |
| Form 8-K, 2026-06-01 | Jeffrey T. Elliott | Director | departed | 2026-06-04 |
Which insiders own Sera Prognostics, 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.
- Baker Bros. Advisors LP, a 10% owner: 5,065,736 shares (17.3% of shares outstanding), held indirectly (the form names the holder only in its footnotes), on a joint filing (Form 3, 2025-02-14).
- , a 10% owner: 5,065,736 shares (17.3% of shares outstanding), held indirectly (the form names the holder only in its footnotes), on a joint filing (Form 3, 2025-02-14).
- Baker Bros. Advisors (GP) LLC, a 10% owner: 5,065,736 shares (17.3% of shares outstanding), held indirectly (the form names the holder only in its footnotes), on a joint filing (Form 3, 2025-02-14).
- , a 10% owner: 5,065,736 shares (17.3% of shares outstanding), held indirectly (the form names the holder only in its footnotes), on a joint filing (Form 3, 2025-02-14).
- , a director: 846,886 shares (2.9% of shares outstanding) (Form 4, 2026-07-14).
Shares outstanding: 29,293,831 as of 2021-08-25, from the company's latest SEC cover page.
How much has Sera Prognostics, Inc. raised?
No fundraising or offering filing from Sera Prognostics, Inc. is on file with us.
Keep reading
More on Sera Prognostics, Inc. and the records around it.
Sera Prognostics, Inc. elsewhere on the record
- Leadership changes Aug 2026
Companies that share a holder
- Whetstone Capital Advisors, LLC also filed stake reports on 3 other companies: Health Catalyst, Inc. (Jun 2026), Open Lending Corp (May 2026)
- Aberdeen Group plc also filed stake reports on 12 other companies: Equillium, Inc. (Nov 2026), IMMUNIC, INC (Nov 2026), CODEXIS, INC. (Oct 2026)
- RA Capital Management, L.P. also filed stake reports on 100 other companies: Climb Bio, Inc. (Nov 2026), Bambusa Therapeutics, Inc. (Nov 2026), SOLID BIOSCIENCES INC. (Nov 2026)
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