As of November 10, 2026, GeneDx Holdings Corp. is a publicly traded company (Nasdaq: WGS). The largest holder reporting an active stake on Schedule 13D is CMLS Holdings LLC, at 17.9%. No bankruptcy or receivership appears in its SEC Form 8-K filings. Passive holders reporting on Schedule 13G include Goldman Sachs (5.8%), BlackRock (5.5%), ARK Invest (5.33%) (Schedule 13D/A, May 22, 2026).
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Is GeneDx Holdings Corp. a real, registered company?
- GeneDx Holdings Corp. files with the SEC under CIK 1818331 (its SEC filings).
- Its shares are listed under the ticker WGS on Nasdaq (SEC company record).
- Incorporated in Delaware; business address in Stamford, Connecticut, 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 GeneDx Holdings Corp. in our court records and SEC 8-K records (as of 2026-11-10).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names William Blair Investment Management, LLC (filed 2026-11-06).
Who are GeneDx Holdings Corp.'s owners and officers?
GeneDx Holdings Corp.: incorporated in Delaware; business address in Stamford, Connecticut; industry Services-Health Services (Schedule 13G, 2026-11-06).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G, 2026-11-06 | William Blair Investment Management, LLC | 5.2% |
| Schedule 13G, 2026-08-11 | The Goldman Sachs Group, Inc. | 5.8% |
| Schedule 13G/A, 2026-08-07 | Ark Investment Management LLC | 5.33% |
| Schedule 13G, 2026-07-28 | Blackrock, Inc. | 5.5% |
| Schedule 13D/A, 2026-05-22 | Cmls Holdings LLC | 17.9% |
| Schedule 13D/A, 2026-05-15 | Cmls Holdings LLC | 17.9% |
| Schedule 13D/A, 2026-05-11 | Cmls Holdings LLC | 16.7% |
| Schedule 13G/A, 2025-11-12 | William Blair Investment Management, LLC | 4.3% |
| Schedule 13D/A, 2025-08-26 | Cmls Holdings LLC | 12.5% |
| Schedule 13G/A, 2025-08-14 | Summit Partners Public Asset Management, LLC | 3.04% |
| Schedule 13G/A, 2025-08-06 | Fmr LLC | 0.6% |
| Schedule 13G, 2025-07-30 | William Blair Investment Management, LLC | 5.7% |
Questions about who owns GeneDx Holdings Corp.
Who owns GeneDx Holdings Corp.?
On this page, 5 holders' latest ownership filings report 5% or more of GeneDx Holdings Corp.: Cmls Holdings LLC (17.9%, Schedule 13D/A, filed 2026-05-22), The Goldman Sachs Group, Inc. (5.8%, Schedule 13G, filed 2026-08-11), Blackrock, Inc. (5.5%, Schedule 13G, filed 2026-07-28), Ark Investment Management LLC (5.33%, Schedule 13G/A, filed 2026-08-07) and William Blair Investment Management, LLC (5.2%, Schedule 13G, filed 2026-11-06).
Who are the largest shareholders of GeneDx Holdings Corp.?
By the share each holder's latest filing reports, the largest holders of GeneDx Holdings Corp. on this page are Cmls Holdings LLC (17.9%), The Goldman Sachs Group, Inc. (5.8%) and Blackrock, Inc. (5.5%).
When did Cmls Holdings LLC buy into GeneDx Holdings Corp.?
The filings give report dates, not purchase dates. The earliest filing from Cmls Holdings LLC on this page is the Schedule 13D/A, filed 2025-08-26, reporting 12.5%; its latest, Schedule 13D/A filed 2026-05-22, reports 17.9%. 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%); 12 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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Which insiders own GeneDx Holdings Corp. 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.
- Corvex Management LP, a director and 10% owner: 5,137,843 shares (17.1% of shares outstanding), 20,129 held directly and 5,117,714 indirectly, on a joint filing (Form 4, 2026-05-15).
- , a director and 10% owner: 4,083,648 shares (13.6% of shares outstanding), 24,093 held directly and 4,059,555 indirectly (Form 4, 2026-06-23).
- Casdin Capital, LLC, a director and 10% owner: 4,060,825 shares (13.5% of shares outstanding), 20,517 held directly and 4,040,308 indirectly, on a joint filing (Form 4, 2026-06-08).
- Casdin Partners Master Fund, L.P., a director and 10% owner: 4,060,825 shares (13.5% of shares outstanding), 20,517 held directly and 4,040,308 indirectly, on a joint filing (Form 4, 2026-06-08).
- Casdin Partners GP, LLC, a director and 10% owner: 4,060,825 shares (13.5% of shares outstanding), 20,517 held directly and 4,040,308 indirectly, on a joint filing (Form 4, 2026-06-08).
Shares outstanding: 29,972,493 as of 2026-11-02, from the company's latest SEC cover page.
How much has GeneDx Holdings Corp. raised?
No fundraising or offering filing from GeneDx Holdings Corp. is on file with us.
Keep reading
More on GeneDx Holdings Corp. and the records around it.
GeneDx Holdings Corp. elsewhere on the record
- 5%+ stake filings Nov 2026
Companies that share a holder
- Summit Partners Public Asset Management, LLC also filed stake reports on 1 other company: SOLARIS ENERGY INFRASTRUCTURE, INC. (Nov 2025)
- ARK Investment Management LLC also filed stake reports on 20 other companies: Tempus AI, Inc. (Nov 2026), 10x Genomics, Inc. (Oct 2026), Twist Bioscience Corp (Sep 2026)
- WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC also filed stake reports on 21 other companies: Baldwin Insurance Group, Inc. (Nov 2026), i3 Verticals, Inc. (Aug 2026), Revolve Group, Inc. (Aug 2026)
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