SCHEDULE 13G

CUSIP No. 83601L102

EXHIBIT INDEX TO SCHEDULE 13G

EXHIBIT 1

Joint Filing Agreement, dated as of February 17, 2026, by and between Sessa Capital (Master), L.P., Sessa Capital Special Opportunity Fund II, L.P., Sessa Capital GP, LLC, Sessa Capital IM, L.P., Sessa Capital IM GP, LLC, and John Petry.

SCHEDULE 13G

CUSIP No. 83601L102

Exhibit 1

JOINT FILING AGREEMENT

Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the undersigned agree, as of February 17, 2026, that only one statement containing the information required by Schedule 13G, and each amendment thereto, need be filed with respect to the ownership by each of the undersigned of shares of Common Stock of Sotera Health Co and such statement to which this Joint Filing Agreement is attached as Exhibit 1 is filed on behalf of each of the undersigned.

	By:	/s/ John Petry
		John Petry
		John Petry, individually, as manager of Sessa Capital GP, LLC, the general partner of Sessa Capital (Master), L.P. and Sessa Capital Special Opportunity Fund II, L.P., and as manager of Sessa Capital IM GP, LLC, the general partner of Sessa Capital IM, L.P.

	Date:	February 17, 2026

Sotera Health Co SCHEDULE 13G