EXHIBIT 99.1

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned agree to the joint filing on behalf of each of them of a statement on Schedule 13G (including any and all amendments thereto) with respect to the Common Stock, $0.01 par value, of Sotera Health Company and further agree to the filing of this agreement to be included as an exhibit to such filing. In addition, each party to this agreement expressly authorizes each other party to this agreement to file on its behalf any and all amendments to such statement on Schedule 13G. Each party to this agreement agrees that this joint filing agreement may be signed in counterparts.

Date: February 14, 2022

WARBURG PINCUS PRIVATE EQUITY XI, L.P.
By: Warburg Pincus XI, L.P., its general partner
By: WP Global LLC, its general partner
By: Warburg Pincus Partners II, L.P., its managing member
By: Warburg Pincus Partners GP LLC, its general partner
By: Warburg Pincus & Co., its managing member
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Partner
WARBURG PINCUS XI PARTNERS, L.P.
By: Warburg Pincus XI, L.P., its general partner
By: WP Global LLC, its general partner
By: Warburg Pincus Partners II, L.P., its managing member
By: Warburg Pincus Partners GP LLC, its general partner
By: Warburg Pincus & Co., its managing member
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Partner

WARBURG PINCUS PRIVATE EQUITY XI-B, L.P.
By: Warburg Pincus XI, L.P., its general partner
By: WP Global LLC, its general partner
By: Warburg Pincus Partners II, L.P., its managing member
By: Warburg Pincus Partners GP LLC, its general partner
By: Warburg Pincus & Co., its managing member
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Partner
WP XI Partners, L.P.
By: Warburg Pincus XI, L.P., its general partner
By: WP Global LLC, its general partner
By: Warburg Pincus Partners II, L.P., its managing member
By: Warburg Pincus Partners GP LLC, its general partner
By: Warburg Pincus & Co., its managing member
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Partner
WARBURG PINCUS PRIVATE EQUITY XI-C, L.P.
By: Warburg Pincus (Cayman) XI, L.P., its general partner
By: Warburg Pincus XI-C, LLC, its general partner
By: Warburg Pincus Partners II (Cayman), L.P., its managing member
By: Warburg Pincus (Bermuda) Private Equity GP Ltd., its general partner
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Authorised Signatory
BULL CO-INVEST L.P.
By: WP Bull Manager LLC, its general partner
By: Warburg Pincus & Co., its managing member
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Partner

WARBURG PINCUS XI, L.P.
By: WP Global LLC, its general partner
By: Warburg Pincus Partners II, L.P., its managing member
By: Warburg Pincus Partners GP LLC, its general partner
By: Warburg Pincus & Co., its managing member
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Partner
WP GLOBAL LLC
By: Warburg Pincus Partners II, L.P., its managing member
By: Warburg Pincus Partners GP LLC, its general partner
By: Warburg Pincus & Co., its managing member
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Partner
WARBURG PINCUS PARTNERS II, L.P.
By: Warburg Pincus Partners GP LLC, its general partner
By: Warburg Pincus & Co., its managing member
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Partner
WARBURG PINCUS PARTNERS II HOLDINGS, L.P.
By: Warburg Pincus Partners GP LLC, its general partner
By: Warburg Pincus & Co., its managing member
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Partner
WARBURG PINCUS PARTNERS GP LLC
By: Warburg Pincus & Co., its managing member
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Partner
WARBURG PINCUS & CO.
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Partner

WARBURG PINCUS (CAYMAN) XI, L.P.
By: Warburg Pincus XI-C, LLC, its general partner
By: Warburg Pincus Partners II (Cayman), L.P., its managing member
By: Warburg Pincus (Bermuda) Private Equity GP Ltd., its general partner
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Authorised Signatory
WARBURG PINCUS XI-C, LLC
By: Warburg Pincus Partners II (Cayman), L.P., its managing member
By: Warburg Pincus (Bermuda) Private Equity GP Ltd., its general partner
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Authorised Signatory
WARBURG PINCUS PARTNERS II (CAYMAN), L.P.
By: Warburg Pincus (Bermuda) Private Equity GP Ltd., its general partner
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Authorised Signatory
WARBURG PINCUS PARTNERS II HOLDINGS (CAYMAN), L.P.
By: WPP II Administrative (Cayman), LLC, its general partner
By: Warburg Pincus (Bermuda) Private Equity GP Ltd., its managing member
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Authorised Signatory
WPP II ADMINISTRATIVE (CAYMAN), LLC
By: Warburg Pincus (Bermuda) Private Equity GP Ltd., its managing member
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Authorised Signatory
WARBURG PINCUS (BERMUDA) PRIVATE EQUITY GP LTD.
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Authorised Signatory
WARBURG PINCUS LLC
By:	/s/ Harsha Marti
Name:	Harsha Marti
Title:	Managing Director