Sotera Health Co

Filing Date

Apr 8, 2026

Transaction Date

Apr 1, 2026

Accession Number

0001193125-26-147592

Form Type

3

Footnotes

1. (F1)These securities consist of 32,180 Restricted Stock Units ("RSUs") and 25,358 shares of Common Stock.
2. (F2)These options were granted on March 4, 2024, pursuant to the terms of a stock option agreement under the Sotera Health Company 2020 Omnibus Incentive Plan ("2020 Incentive Plan"). The options vest annually in three equal installments commencing on March 2, 2025, subject to the Reporting Person's continued service through each such date and expire 10 years after the grant date.
3. (F3)These options were granted on March 4, 2024, pursuant to the terms of a stock option agreement under the 2020 Incentive Plan, and have vested in full. These options expire 10 years after the grant date.
4. (F4)These securities consist of the maximum number of additional performance-based RSUs that were granted on March 3, 2025, pursuant to the terms of an RSU agreement under the 2020 Incentive Plan. Each additional RSU represents the Reporting Person's right to receive one share of Common Stock, subject to stock-price related conditions. The additional RSUs vest in equal annual installments in March 2027 and March 2028, subject to performance.
5. (F5)These securities consist of the maximum number of additional performance-based RSUs that were granted on March 2, 2026, pursuant to the terms of an RSU agreement under the 2020 Incentive Plan. Each additional RSU represents the Reporting Person's right to receive one share of Common Stock, subject to stock-price related conditions. The additional RSUs generally vest annually in 60%, 20% and 20% installments, respectively, commencing March 2027, subject to performance.