Organization and Description of Business

9 Months Ended

Sep. 30, 2026

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Description of Business

Organization and Description of Business

GeneDx Holdings Corp., through its subsidiary GeneDx, LLC, is a leading genomics company—one that sits at the intersection of diagnostics and data science, pairing decades of genomic expertise with an ability to interpret clinical data at scale. The Company believes that everyone deserves personalized, targeted medical care—and that it all begins with a genetic diagnosis. Fueled by one of the world’s largest rare disease data sets, the Company’s industry-leading exome and genome tests translate complex genomic data into clinical answers that unlock personalized health plans, accelerate drug discovery, and improve health system efficiencies. The Company operates with conviction that what is best for patients must be embedded in every aspect of our work. In support of these beliefs, we value equitability, simplicity and transparency.

Unless otherwise stated herein or unless the context otherwise requires, references in these notes to:

•“GeneDx Holdings” refer to GeneDx Holdings Corp., a Delaware corporation;

•“Legacy GeneDx” refer to GeneDx, LLC, a Delaware limited liability company, which we acquired on April 29, 2022 (the “Acquisition”);

•“Legacy Sema4” refer to Sema4 OpCo Inc., a Delaware corporation, which consummated the business combination with CM Life Sciences, Inc. (“CMLS”) on July 22, 2021 (the “Business Combination”);

•“Fabric Genomics” refer to Fabric Genomics, Inc., a Delaware Corporation, which we acquired on May 5, 2025 (the “Merger”); and

•“we,” “us” and “our,” the “Company” and “GeneDx” refer, as the context requires, to GeneDx Holdings and its consolidated subsidiaries.