Bpifrance Participations SC 13D VectivBio Holding / Bpifrance Participations ownership change

Exhibit 99.1

JOINT FILING AGREEMENT

The undersigned acknowledge and agree that the foregoing statement on Schedule 13D (including amendments thereto) is filed on behalf of each of the undersigned and that all subsequent amendments to this foregoing shall be filed on behalf of each of the undersigned without the necessity of filing additional joint filing agreements. 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 Agreement may be executed in counterparts and each of such counterparts taken together shall constitute one and the same instrument.

Dated: April 23, 2021
	FPCI Bpifrance Innovation I
	By:	/s/ Sophie Paquin
	Name:	Sophie Paquin
	Title:	Director of Legal Affairs

Bpifrance Investissement S.A.S.
By:	/s/ Sophie Paquin
Name:	Sophie Paquin
Title:	Director of Legal Affairs

Bpifrance Participations S.A.
By:	/s/ Sophie Paquin
Name:	Sophie Paquin
Title:	Director of Legal Affairs

Caisse des Dépôts
By:	/s/ Laurence Giraudon
Name:	Laurence Giraudon
Title:	Chief Operating Officer Finance and Operations Department Asset Management Division

EPIC Bpifrance
By:	/s/ Sophie Paquin
Name:	Sophie Paquin
Title:	Director of Legal Affairs

Page 12 of 13 Pages

Bpifrance S.A.
By:	/s/ Boubakar Dione
Name:	Boubakar Dione
Title:	Group Director of Legal Affairs

Page 13 of 13 Pages