Cash Retention Bonus Agreement by and between Michael Rutz and Sotera Health Company dated as of November 7, 2022

1.Retention Bonus. In consideration for the Employee’s continued active employment with the Company, the Employee shall receive a cash bonus from the Company equal to $1,000,000 (the “Retention Bonus”), subject to applicable tax withholdings.

2.Vesting. The Retention Bonus shall vest in four (4) installments as follows: i) 10% of the Retention Bonus will vest on the date that is 6 months from the Grant Date; (ii) 20% of the Retention Bonus will vest on the date that is 12 months from the Grant Date; (iii) 30% of the Retention Bonus will vest on the date that is 18 months from the Grant Date; and (iv) 40% of the Retention Bonus will vest on the date that is 24 months from the Grant Date, subject in each case to the recipient’s continued employment in good standing with the Company through each applicable vesting date (each, a “Vesting Date”). Each installment shall be paid in a lump sum cash payment as soon as practicable following the applicable Vesting Date.

3.Termination of Employment. If your employment with the Company and its subsidiaries terminates for any reason prior to any applicable Vesting Date (or any other condition set forth in paragraph 2 above is not satisfied), your right to payment of any unvested portion of the Retention Bonus will be forfeited in its entirety.

4.No Right to Continued Employment. The Employee agrees and acknowledges that this Agreement does not constitute a contract of employment or change the at-will nature of the Employee’s employment and that the Company is not making any guarantee or promise of future employment.

5.Effect on Other Benefits. You acknowledge that payment of the Retention Bonus is not part of normal or expected compensation for purposes of calculating any severance, resignation, redundancy, end of service payments, bonuses, long-service awards, pension or retirement benefits, matching contributions or similar payments.

6.Successors. This Agreement shall be binding upon the heirs, successors and assigns of the parties, including the Employee. Without the Company’s prior written consent, the Employee may not assign or delegate any or all rights, duties or obligations under this Agreement.

7.Funding Status. The Company’s obligations under this Agreement shall be unfunded and unsecured.

8.Section 409A. No amounts payable under this Agreement are intended to constitute “nonqualified deferred compensation” under Section 409A of the Code (“Section 409A”), and this Agreement shall be interpreted, construed and administered in a manner that reflects this intention.

9.Governing Law. This Agreement shall be construed and enforced according to the laws of the State of Delaware, to the extent not preempted by federal law, without regard to its conflict of law rules.

10.Entire Agreement; Amendment. This Agreement constitutes the entire agreement of the parties with respect to the subject matter hereof. No amendment hereto shall be effective unless it is in writing and executed by each of the parties hereto.

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IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the date and year first above written.