JOINT FILING AGREEMENT PURSUANT TO RULE 13D-1(K)(1)

Exhibit A

JOINT FILING AGREEMENT

PURSUANT TO RULE 13D-1(K)(1)

The undersigned acknowledge and agree that the Statement on Schedule 13D filed with the Securities and Exchange Commission on or about the date hereof with respect to the beneficial ownership by the undersigned of the shares of Common Stock, par value $0.0001 per share, of Science 37 Holdings, Inc. is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13D shall be filed on behalf of each of the undersigned that is named as a reporting person in such filing without the necessity of filing an additional joint filing agreement. The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning it contained therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent that it knows or has reason to believe that such information is inaccurate. This joint filing agreement may be executed in any number of counterparts and all of such counterparts taken together shall constitute one and the same instrument.

Dated: October 18, 2021

PPD, INC.
By:		/s/ Xxxxx Xxxxx
Name:		Xxxxx Xxxxx
Title:		EVP, General Counsel and Secretary
EAGLE HOLDING COMPANY II, LLC
By:		/s/ B. Xxxx Xxxxxxx
Name:		B. Xxxx Xxxxxxx
Title:		General Counsel and Secretary
JAGUAR HOLDING COMPANY I, LLC
By: Eagle Holding Company II, LLC, its Managing Member
By:		/s/ B. Xxxx Xxxxxxx
Name:		B. Xxxx Xxxxxxx
Title:		General Counsel and Secretary
JAGUAR HOLDING COMPANY II
By:		/s/ Xxxxx Xxxxx
Name:		Xxxxx Xxxxx
Title:		General Counsel and Secretary

WILDCAT ACQUISITION HOLDINGS (UK) LIMITED
By:		/s/ B. Xxxx Xxxxxxx
Name:		B. Xxxx Xxxxxxx
Title:		Director
PHARMACEUTICAL PRODUCT DEVELOPMENT, LLC
By:		/s/ Xxxxx Xxxxx
Name:		Xxxxx Xxxxx
Title:		EVP, General Counsel and Secretary

[Joint Filing Agreement]