144: Filer Information

Filer CIK

0001689575

Filer CCC

XXXXXXXX

Is this a LIVE or TEST Filing?

LIVE

TEST

Submission Contact Information

Name

Phone

E-Mail Address

144: Issuer Information

Name of Issuer

GeneDx Holdings Corp.

SEC File Number

001-39482

Address of Issuer

333 Ludlow St, North Tower
6th Floor
Stamford
CONNECTICUT
06902

Phone

888-729-1206

Name of Person for Whose Account the Securities are To Be Sold

Katherine Stueland

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

Director

Relationship to Issuer

Officer

144: Securities Information

Title of the Class of Securities To Be Sold

Name and Address of the Broker

Number of Shares or Other Units To Be Sold

Aggregate Market Value

Number of Shares or Other Units Outstanding

Approximate Date of Sale

Name the Securities Exchange

Class A Common Stock

Morgan Stanley Smith Barney
2000 Westchester Avenue
Purchase � NY � 10577

16415

1037500

29288739

04/29/2026

NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class

Date you Acquired

Nature of Acquisition Transaction

Name of Person from Whom Acquired

Is this a Gift?

Date Donor Acquired

Amount of Securities Acquired

Date of Payment

Nature of Payment *

Class A Common Stock

05/02/2022

Acquired as compensation - Restricted Stock Units

Issuer

2172

05/02/2022

Compensation

Class A Common Stock

12/09/2022

Acquired as compensation - Restricted Stock Units

Issuer

3686

12/09/2022

Compensation

Class A Common Stock

04/26/2023

Acquired as compensation - Restricted Stock Units

Issuer

10557

04/26/2023

Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller

Title of Securities Sold

Date of Sale

Amount of Securities Sold

Gross Proceeds

SEC Form 144 filed by GeneDx Holdings Corp.