Exhibit 4.26


 


PORTIONS OF THIS EXHIBIT IDENTIFIED BY [*****] HAVE BEEN EXCLUDED FROM THIS EXHIBIT BECAUSE THE EXCLUDED INFORMATION IS BOTH (I) NOT MATERIAL
AND (II) WOULD BE COMPETITIVELY HARMFUL IF PUBLICLY DISCLOSED.


 


 


 


	 	BLUECOMPANION Ltd
	 	Carlyle House, Lower Ground Floor
	 	235-237 Vauxhall Bridge Road, London,
	 	England
	 	SW1V 1EJ United Kingdom
	 	 
	 	Registered in England
	 	Company Number: 9648211
	 	VAT Number: UK 273 7423 90


 


M. Sam Agus


Chief Medical Officer


BIOPHYTIS SA


14 avenue de l’Opéra


75001


Paris, France


 


Addendum to the “Amendment of 31 October 2019 to Service
Proposal for SARA INT of 22/12/2017 (previously amended on July 20, 2018)”


 


In the agreement signed on November 2nd, 2019 (Amendment
of 31 October 2019 to Service Proposal for SARA INT of 22/12/2017 (previously amended on July 20, 2018)) a commitment of BlueCompanion
human resources equal to 2.0 FTE (Full Time Equivalent) was established. These resources should cover all the activities best described
in the amendment which can be summarized in:


 


		·	eCRF and CLIP user support



 


		·	eCRF programming according to the last SARA INT amendment



 


		·	IP ICT management for SARA INT



 


		·	eCRF and CLIP Report management (Design and development)



 


		·	User credential management, opening, closing and tracking.



 


		·	Documentation and quality activities



 


In the amendment it is also established to monitor resources
to verify any deviation from the 2 FTEs, and if this exceeds a certain threshold, the contract is adjusted after the approval of
Biophytis.


 


 



    	Sara INT – Addendum February 2020 to the amended Service
 Proposal 2-11-2019	20-02-2020	1/4



     


    




 


 


 


The monitoring of the activities carried out between November
2019 and January 2019 resulted in a verified commitment of Bluecompanion resources equal to 3.8 FTE (without taking into account
the activities carried out by Gianluca Zia). Moreover, following a reprogramming plan in the IP ICT management for SARA INT, additional
tasks of BlueCompanion activities have also been envisaged, which cannot be solved without a greater commitment of time.


 


It was therefore agreed to increase the resources by 1.30
FTEs, to be added to the 2 current FTEs, for the period from 1 January 2020 to 30 June 2020 (6 months).


 


The monthly fee of 1.3 FTE that Biophytis will pay to Bluecompanion
has been agreed in 6,500.00 € which will be invoiced starting from the month of February 2020 (Invoice issued in early March
2020) until August 2020 (Invoice issued in early August 2020).


 


Invoices will be paid within 10 days from the date of issue,
as agreed for the invoices of the amendment of 10/31/19.


 


The commitment of Bluecompanion resources on the project will
be monitored monthly to verify the compliance of the actual activities carried out with respect to the 3.3 total FTE from January
2020 to June 2020 established in the contract.


 


All the conditions of the amendment 10/31/2019 remain valid
and unchanged.


 






    	Sara INT – Addendum February 2020 to the amended Service
 Proposal 2-11-2019	20-02-2020	2/4



     


    

 


 


 


Without prejudice to the provisions of the previous amendment,
invoices and payments for these further activities will be invoiced according to the following scheme:


 


[****]


 



    	Sara INT – Addendum February 2020 to the amended Service
 Proposal 2-11-2019	20-02-2020	3/4



     


    










 


 


 


	Bluecompanion Ltd
	Ing. Gianluca Zia
	 	 	 
	Signature	/s/
                                         [ILLEGIBLE]	
	 	 	 
	 	 	 
	Acceptance of proposal
	 	 	 
	Biophytis	 	 
	 	 	 
	Signature	/s/
Stanislas Veillet                                         	
	 	 	 
	Date	03/03/2020	
	 	 	 



 






    	Sara INT – Addendum February 2020 to the amended Service
 Proposal 2-11-2019	20-02-2020	4/4