GeneDx Holdings Corp. — Director's Dealing 2021

Oct 8, 2021

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: Sema4 Holdings Corp. (SMFR)
CIK: 0001818331
Period of Report: 2021-07-22

Reporting Person: ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI (10% Owner)
Reporting Person: MOUNT SINAI HEALTH SYSTEM, INC. (10% Owner)

Holdings (Non-Derivative)

Security	Shares	Ownership
Class A Common Stock	88355473	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Earn-out Shares	$0.00		Class A Common Stock (11597198)		Direct

Footnotes

F1: The securities reported herein are held directly by the Reporting Person. As its sole member, Mount Sinai Health System, Inc., a NY not-for-profit corporation ("MSHS"), may be deemed to beneficially own securities owned by the Reporting Person; however, MSHS does not have voting or investment power over such securities and disclaims beneficial interest therein except to the extent of its pecuniary interest, if any.

F2: Shares of Issuer's Class A common stock that may be issued upon the occurrence of certain triggering events pursuant to the earn-out provisions of that certain Agreement and Plan of Merger, dated February 9, 2021 (the "Merger Agreement"), by and among CM Life Sciences, Inc., S-IV Sub, Inc., and Mount Sinai Genomics, Inc. d/b/a Sema4 (the "Earn Out Shares").

F3: See footnote 2.

F4: Not applicable.

F5: Maximum number of shares of Class A common stock of Issuer that may be issued to Reporting Person pursuant to the Merger Agreement as a result of the occurrence of certain triggering events set forth therein.