GeneDx Holdings WGS Insider Ownership

NASDAQ WGS

$66.29 +2.68 (+4.21%)

At close: Oct 19, 2026 · 4:00 PM EDT

Insider Holdings by Owner

12.48Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

40.92%

▼-8.85% pp QoQ

Shares Held by Insiders

12.16Mn

filed for Sep 2026

▼-17.78% QoQ

Shares Outstanding

29.71Mn

29,710,139 shares

Direct Holdings

3.07Mn

Indirect: 9.09Mn

Net Shares Traded (QoQ)

-2.63Mn

net selling in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 5, 2026

Across the past 12 months, open-market trades by GeneDx Holdings insiders totaled $106.6 million in purchases (2.43Mn shares) and $21.81 million in sales (229.06K shares).

A count shows 2 insiders buying WGS stock on the open market over the past 12 months and 4 insiders selling.
Among GeneDx Holdings' insiders, Keith A. Meister (Director and 10% owner) was the largest open-market buyer over the past 12 months, purchasing $74.03 million of stock (1.73Mn shares), most recently on May 15, 2026.
On the sell side, Katherine Stueland (Chief Executive Officer) led open-market sales of GeneDx Holdings stock over the past 12 months with $11.51 million (142.06K shares), most recently on September 16, 2026.
Outside the open market, GeneDx Holdings insiders received 68.34K shares in stock awards and acquired 282.66K shares through option exercises and conversions over the past 12 months.
Business Quant data shows GeneDx Holdings insiders holding 12.16Mn shares in total in their latest Form 4 filings, or 40.92% of the 29.71Mn shares outstanding.
GeneDx Holdings insiders hold 3.07Mn shares directly (25.24% of their total) and 9.09Mn shares (74.76%) indirectly, through entities such as trusts and partnerships.
Per Business Quant, 11 insiders of WGS hold shares, counting officers, directors and 10% owners who have filed a Form 4 in the past two years.
GeneDx Holdings' three biggest insider holders are Keith A. Meister (Director and 10% owner, 4.81Mn shares), Eli Casdin (Director and 10% owner, 4.06Mn shares) and School of Medicine at Mount Sinai Icahn (10% owner, 2.72Mn shares), based on their latest Form 4 filings.
The holding of Keith A. Meister makes up 39.55% of all shares held by GeneDx Holdings insiders.
In the past year, 12 insiders of GeneDx Holdings submitted 51 Form 4 filings reporting trades, awards or other transactions.
These insider figures for GeneDx Holdings are based on Form 4 filings through September 18, 2026.

Form 4 Holdings

Insiders Holding WGS

Insiders 25

Shares held 12.48Mn

Of outstanding 42.02%

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	Capital, Llc Casdin	Director, TenPercentOwner	0	6,714,328	6,714,328	53.8%	08 Jun, 2026
2	School Of Medicine At Mount Sinai Icahn	TenPercentOwner	2,719,692	0	2,719,692	21.8%	19 Nov, 2024
3	Health, Inc. Opko	TenPercentOwner	2,646,972	0	2,646,972	21.2%	19 Aug, 2024
4	Katherine Stueland	Chief Executive Officer	115,476	0	115,476	0.9%	18 Sep, 2026
5	Richard C Jr Pfenniger	Director	45,082	0	45,082	0.4%	23 Jun, 2026
6	Kevin Feeley	Chief Financial Officer	44,945	0	44,945	0.4%	18 Sep, 2026
7	Joshua Ruch	Director	33,299	0	33,299	0.3%	23 Jun, 2026
8	Kareem Saad	Chief Transformation Officer	29,517	0	29,517	0.2%	19 Mar, 2024
9	Emily M. Leproust	Director	24,852	0	24,852	0.2%	23 Jun, 2026
10	Eli Casdin	Director, TenPercentOwner	24,093	0	24,093	0.2%	23 Jun, 2026
11	Keith A. Meister	Director, TenPercentOwner	23,705	0	23,705	0.2%	23 Jun, 2026
12	Jason Ryan	Executive Chairman	15,480	0	15,480	0.1%	23 Jun, 2026
13	Daniel Emmett Clark	Secretary And General Counsel	9,460	0	9,460	0.1%	27 Jul, 2022
14	Isaac Ro	Chief Financial Officer	7,394	0	7,394	0.1%	10 Aug, 2022
15	Eric Schadt	President Chief Rd Officer	7,374	0	7,374	0.1%	24 May, 2022
16	Tactical Opportunities Associates Iii - Nq L.P. Blackstone	TenPercentOwner	0	4,918	4,918	0.0%	03 May, 2022
17	Sema4 Holdings L.P. Bto	TenPercentOwner	0	4,918	4,918	0.0%	03 May, 2022
18	Karen Ann White	Chief People Officer	4,761	0	4,761	0.0%	27 Jul, 2023
19	Rachel E. Sherman	Director	1,766	0	1,766	0.0%	04 May, 2023
20	Nat Turner	Director	1,146	0	1,146	0.0%	12 May, 2022
21	Thomas Fuchs	Director	1,146	0	1,146	0.0%	18 Sep, 2026
22	Shawn Assad	Chief Accounting Officer	973	0	973	0.0%	12 May, 2022
23	Richard Miao	Other	753	0	753	0.0%	26 Aug, 2022
24	Michael J Pellini	Director	519	0	519	0.0%	18 Oct, 2022
25	Anthony Prentice	Chief Product Officer	367	0	367	0.0%	27 Jul, 2022

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

1,103 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
17 Sep, 2026	Thomas Fuchs	Director	Acquired M	1,146	$0.00	$0	1,146	Direct
16 Sep, 2026	Katherine Stueland	Chief Executive Officer	Acquired M	18,750	$0.00	$0	125,977	Direct
16 Sep, 2026	Kevin Feeley	Chief Financial Officer	Acquired M	7,197	$0.00	$0	48,673	Direct
16 Sep, 2026	Katherine Stueland	Chief Executive Officer	Disposed S	1,648	$94.26	$155.34K	124,329	Direct
17 Sep, 2026	Thomas Fuchs	Director	Disposed M	1,146	$0.00	$0	2,292	Direct
16 Sep, 2026	Kevin Feeley	Chief Financial Officer	Disposed S	586	$94.26	$55.24K	48,087	Direct
16 Sep, 2026	Katherine Stueland	Chief Executive Officer	Disposed S	148	$95.41	$14.12K	124,181	Direct
16 Sep, 2026	Kevin Feeley	Chief Financial Officer	Disposed S	52	$95.41	$4.96K	48,035	Direct
16 Sep, 2026	Kevin Feeley	Chief Financial Officer	Disposed S	541	$96.90	$52.42K	47,494	Direct
16 Sep, 2026	Katherine Stueland	Chief Executive Officer	Disposed S	1,525	$96.90	$147.77K	122,656	Direct
16 Sep, 2026	Katherine Stueland	Chief Executive Officer	Disposed S	4,141	$98.27	$406.94K	118,515	Direct
16 Sep, 2026	Kevin Feeley	Chief Financial Officer	Disposed S	1,470	$98.27	$144.46K	46,024	Direct
16 Sep, 2026	Katherine Stueland	Chief Executive Officer	Disposed S	3,039	$99.00	$300.85K	115,476	Direct
16 Sep, 2026	Kevin Feeley	Chief Financial Officer	Disposed S	1,079	$99.00	$106.82K	44,945	Direct
16 Sep, 2026	Kevin Feeley	Chief Financial Officer	Disposed M	7,197	$0.00	$0	14,393	Direct
16 Sep, 2026	Katherine Stueland	Chief Executive Officer	Disposed M	18,750	$0.00	$0	37,500	Direct
09 Sep, 2026	Kevin Feeley	Chief Financial Officer	Acquired M	2,462	$0.00	$0	42,761	Direct
09 Sep, 2026	Katherine Stueland	Chief Executive Officer	Acquired M	6,547	$0.00	$0	110,919	Direct
09 Sep, 2026	Kevin Feeley	Chief Financial Officer	Disposed S	1,285	$84.22	$108.22K	41,476	Direct
09 Sep, 2026	Katherine Stueland	Chief Executive Officer	Disposed S	3,692	$84.22	$310.93K	107,227	Direct

Showing 1 to 20 of 1,103 transactions