Exhibit 99.1
List of Reporting Owners and Signature Page
Name of designated filer: Warburg Pincus & Co.
Other joint filers: Warburg Pincus Private Equity XI-C, L.P., Warburg Pincus (Cayman) XI, L.P., Warburg Pincus XI-C, LLC, Warburg Pincus Partners II (Cayman), L.P., Warburg Pincus (Bermuda) Private Equity GP Ltd., Warburg Pincus LLC, Warburg Pincus Partners GP LLC.
Address for each joint filer is: c/o Warburg Pincus & Co., 450 Lexington Avenue, New York, New York 10017
Issuer Name and Ticker or Trading Symbol: Sotera Health Co [SHC]
| WARBURG PINCUS & CO. | |||
| By: | /s/ Harsha G. Marti | 09/09/2024 | |
| ** Signature of Reporting Person | Date | ||
| Name: | Harsha G. 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 G. Marti | 09/09/2024 | |
| ** Signature of Reporting Person | Date | ||
| Name: | Harsha G. 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 G. Marti | 09/09/2024 | |
| ** Signature of Reporting Person | Date | ||
| Name: | Harsha G. Marti | ||
| Title: | Partner | ||
| 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 G. Marti | 09/09/2024 | |
| ** Signature of Reporting Person | Date | ||
| Name: | Harsha G. Marti | ||
| Title: | Partner | ||
| |||
| WARBURG PINCUS PARTNERS II (CAYMAN), L.P. | |||
| By: | Warburg Pincus (Bermuda) Private Equity GP Ltd., its general partner | ||
| By: | /s/ Harsha G. Marti | 09/09/2024 | |
| ** Signature of Reporting Person | Date | ||
| Name: | Harsha G. Marti | ||
| Title: | Partner | ||
| WARBURG PINCUS (BERMUDA) PRIVATE EQUITY GP LTD. | |||
| By: | /s/ Harsha G. Marti | 09/09/2024 | |
| ** Signature of Reporting Person | Date | ||
| Name: | Harsha G. Marti | ||
| Title: | Partner
| ||
WARBURG PINCUS LLC | |||
| By: | /s/ Harsha G. Marti | 09/09/2024 | |
| ** Signature of Reporting Person | Date | ||
| Name: | Harsha G. Marti | ||
| Title: | Partner | ||
| WARBURG PINCUS PARTNERS GP, LLC | |||
| By: | Warburg Pincus & Co., its managing member | ||
| By: | /s/ Harsha G. Marti | 09/09/2024 | |
| ** Signature of Reporting Person | Date | ||
| Name: | Harsha G. Marti | ||
| Title: | Partner | ||