GeneDx Holdings Corp.
WGS- Exchange
- Nasdaq
- Industry
- Services-Health Services
- SEC CIK
- 0001818331
In the last 90 days, GeneDx Holdings Corp. insiders filed 0 open-market purchases and 5 sales; 223 institutions reported holding it in 13F filings for Q2 2026, worth $2.17B in total; ARK Invest is the only superinvestor holding it.
Holders of 5% or more of WGS
Holders whose latest Schedule 13D or 13G filing reports 5% or more of GeneDx Holdings Corp., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| CMLS Holdings LLC | 13D/A | 12.50%3.63M shares | −1.70 ppfrom 14.20% | May 7, 20252 filings | Aug 26, 2025 | 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
12 Schedule 13D and 13G filings on GeneDx Holdings Corp., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Nov 12, 20256:14 PM ET | William Blair Investment Management, LLC | 13G/A | 4.30%1.24M shares | −1.40 ppfrom 5.70%Below 5% | Sep 30, 2025 | SEC |
| Aug 26, 202511:27 AM ET | CMLS Holdings LLCand 8 others | 13D/A | 12.50%3.63M shares | −1.70 ppfrom 14.20% | Aug 22, 2025 | SEC |
| Aug 14, 202512:33 PM ET | Summit Partners Public Asset Management, LLCand 12 others | 13G/A | 3.04%867.3K shares | −2.15 ppfrom 5.19%Below 5% | Jun 30, 2025 | SEC |
| Aug 6, 202512:01 PM ET | FMR LLCand 1 other | 13G/A | 0.60%163.3K shares | −9.40 ppfrom 10.00%Below 5% | Jun 30, 2025 | SEC |
| Jul 30, 202512:19 PM ET | William Blair Investment Management, LLC | 13G | 5.70%1.63M shares | New | Jun 30, 2025 | SEC |
| May 12, 202510:32 AM ET | FMR LLCand 1 other | 13G | 10.00%2.79M shares | New | Mar 31, 2025 | SEC |
| May 9, 202512:28 PM ET | Goldman Sachs Group Incand 1 other | 13G/A | 3.90%1.11M shares | −1.30 ppfrom 5.20%Below 5% | Mar 31, 2025 | SEC |
| May 7, 20254:01 PM ET | CMLS Holdings LLCand 9 others | 13D/A | 14.20%4.10M shares | – | May 5, 2025 | SEC |
| Feb 21, 20254:30 PM ET | Icahn School of Medicine at Mount Sinaiand 1 other | 13D/A | 4.89%1.37M shares | −1.21 ppfrom 6.10%Below 5% | Feb 21, 2025 | SEC |
| Feb 18, 20258:01 PM ET | Icahn School of Medicine at Mount Sinaiand 1 other | 13D/A | 6.10%1.68M shares | – | Feb 18, 2025 | SEC |
| Feb 12, 20254:26 PM ET | Summit Partners Public Asset Management, LLCand 12 others | 13G | 5.19%1.43M shares | New | Feb 5, 2025 | SEC |
| Feb 5, 20254:05 PM ET | Goldman Sachs Group Incand 1 other | 13G | 5.20%1.42M shares | New | Dec 31, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell GeneDx Holdings Corp. shares.
No Form 144 notices for GeneDx Holdings Corp. are on file.