GeneDx Holdings Corp.

Last updated September 27, 2026

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Organization details

Legal name: GeneDx Holdings Corp.
Former names: Sema4 Holdings Corp. CM Life Sciences, Inc.
Ownership: Public
Status: Active
Sector (GICS): Health Care
SIC code: 8000 — Services-Health Services
Jurisdiction of incorporation: Delaware
Headquarters city: Stamford
Headquarters state / province: Connecticut
Headquarters country: United States
Fiscal year end: December
Ticker symbol: WGS
Primary stock exchange: Nasdaq

Identifiers

SEC CIK: 0001818331
EIN: 85-1966622

Board of directors

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Eli Casdin · Director
Since 2023
Emily M. Leproust · Director
Since 2023
Jason Ryan · Director · Executive Chairman
Since 2023
Joshua Ruch · Director
Since 2023
Katherine Stueland · Director · CHIEF EXECUTIVE OFFICER
Since 2023
Keith A. Meister · Director
Since 2023
Rachel E. Sherman · Director
Since 2023
Richard C. Pfenniger Jr. · Director
Since 2023
Thomas Fuchs · Director
Since 2025

Chief executives

Katherine Stueland · Chief Executive Officer

Dates unknown

Director election results

Annual meeting of June 18, 2026. Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.

Katherine Stueland

75.7%

Board connections

4 of this board's directors also sit on 8 other boards. 4 are in the same sector.

Shared director Other board Same sector

Cocrystal Pharma Inc. Same sector
via Richard C. Pfenniger Jr.
Fluent Inc.
via Richard C. Pfenniger Jr.
Illumina Inc.
via Keith A. Meister
MGM Resorts International
via Keith A. Meister
OPKO Health Inc. Same sector
via Richard C. Pfenniger Jr.
Standard BioTools Inc. Same sector
via Eli Casdin
Twist Bioscience Corporation Same sector
via Emily M. Leproust
Vestis Corporation
via Keith A. Meister

Insider trades

All notable trades →

From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.

Bought, last 12 months: $106,601,813; 34 purchases by 3 insiders
Sold, last 12 months: $21,462,586; 105 sales by 4 insiders

Date	Insider	Transaction	Shares	Price	Value
Sep 17, 2026	Thomas Fuchs Director	Option exercise	+1,146	—	—
Sep 16, 2026	Feeley Kevin Officer (CHIEF FINANCIAL OFFICER)	Option exercise	+7,197	—	—
Sep 16, 2026	Katherine Stueland Director, Officer (CHIEF EXECUTIVE OFFICER)	Option exercise	+18,750	—	—
Sep 16, 2026	Feeley Kevin Officer (CHIEF FINANCIAL OFFICER)	Open-market sale	−586	$94.26	$55,236
Sep 16, 2026	Katherine Stueland Director, Officer (CHIEF EXECUTIVE OFFICER)	Open-market sale	−1,648	$94.26	$155,340
Sep 16, 2026	Feeley Kevin Officer (CHIEF FINANCIAL OFFICER)	Open-market sale	−52	$95.41	$4,961
Sep 16, 2026	Katherine Stueland Director, Officer (CHIEF EXECUTIVE OFFICER)	Open-market sale	−148	$95.41	$14,121
Sep 16, 2026	Feeley Kevin Officer (CHIEF FINANCIAL OFFICER)	Open-market sale	−541	$96.90	$52,423
Sep 16, 2026	Katherine Stueland Director, Officer (CHIEF EXECUTIVE OFFICER)	Open-market sale	−1,525	$96.90	$147,773
Sep 16, 2026	Feeley Kevin Officer (CHIEF FINANCIAL OFFICER)	Open-market sale	−1,470	$98.27	$144,457
Sep 16, 2026	Katherine Stueland Director, Officer (CHIEF EXECUTIVE OFFICER)	Open-market sale	−4,141	$98.27	$406,936
Sep 16, 2026	Feeley Kevin Officer (CHIEF FINANCIAL OFFICER)	Open-market sale	−1,079	$99.00	$106,821
Sep 16, 2026	Katherine Stueland Director, Officer (CHIEF EXECUTIVE OFFICER)	Open-market sale	−3,039	$99.00	$300,861
Sep 9, 2026	Feeley Kevin Officer (CHIEF FINANCIAL OFFICER)	Option exercise	+2,462	—	—
Sep 9, 2026	Katherine Stueland Director, Officer (CHIEF EXECUTIVE OFFICER)	Option exercise	+6,547	—	—

Peers

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Questions about GeneDx Holdings Corp.

Who is the CEO of GeneDx Holdings Corp.?

Katherine Stueland is GeneDx Holdings Corp.'s Chief Executive Officer.

How many directors are on GeneDx Holdings Corp.'s board?

GeneDx Holdings Corp.'s board has 9 directors: Eli Casdin, Emily M. Leproust, Jason Ryan, Joshua Ruch, Katherine Stueland, Keith A. Meister, Rachel E. Sherman, Richard C. Pfenniger Jr. and Thomas Fuchs.

Are GeneDx Holdings Corp. insiders buying or selling shares?

Over the last 12 months, GeneDx Holdings Corp. insiders bought $106.6 million of shares in 34 purchases and sold $21.5 million of shares in 105 sales on the open market, as reported to the SEC on Forms 4 and 5.

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