SHC

SEC source: 0001822479-22-000076 · wf-form4_166803216571483.xml · nonDerivative · entry 1

DIMITRIEF ALEXANDER · CIK 0001614732 · SVP, General Counsel and Sec.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 235,478

F1 · shares: These shares of Common Stock were granted pursuant to the terms of a restricted stock agreement under the Sotera Health Company 2020 Omnibus Incentive Plan ("2020 Incentive Plan") and remain subject to vesting conditions. 235,478 shares of unvested Common Stock will vest in two equal installments on each of October 31, 2023 and October 31, 2024, subject to the Reporting Person's continued service through each such date.

F2 · balance_after: These securities remain subject to vesting conditions. 235,478 shares of unvested Common Stock will vest in two equal installments on each of October 31, 2023 and October 31, 2024, subject to the Reporting Person's continued service through each such date.

SEC source: 0001822479-22-000078 · wf-form4_166803242535825.xml · derivative · entry 3

Petras Michael B. Jr. · CIK 0001832387 · Director · Chairman & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,108,356

Underlying: Common Stock · 2,108,356 shares

Expires 2032-11-07

F3 · derivative.exercise_date: These options were granted on November 7, 2022, pursuant to the terms of a stock option agreement under the Sotera Health Company 2020 Omnibus Incentive Plan ("2020 Incentive Plan"). The options vest in three installments, as follows: 30%, 30%, and 40% of the options vest on each of the 12-month, 18-month, and 24-month anniversaries, respectively, of the date of grant, subject to the Reporting Person's continued service through each such date.

F3 · balance_after: These options were granted on November 7, 2022, pursuant to the terms of a stock option agreement under the Sotera Health Company 2020 Omnibus Incentive Plan ("2020 Incentive Plan"). The options vest in three installments, as follows: 30%, 30%, and 40% of the options vest on each of the 12-month, 18-month, and 24-month anniversaries, respectively, of the date of grant, subject to the Reporting Person's continued service through each such date.

SEC source: 0001822479-22-000040 · wf-form4_165403313817041.xml · nonDerivative · entry 1

GEVEDA STEPHANIE · CIK 0001673202 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,848

F1 · shares: These securities consist of 10,643 Restricted Stock Units ("RSUs") that were granted on May 27, 2022, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan. Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions. The RSUs will vest in full on the earlier of (i) the first anniversary of the date of grant, or (ii) the date immediately prior to the Issuer's next regular annual shareholders meeting, subject to the Reporting Person's continued service as a non-employee director of the Issuer through such date.

F2 · balance_after: These securities consist of 10,643 RSUs and 15,205 shares of Common Stock.

SEC source: 0001822479-22-000044 · wf-form4_165403344438136.xml · nonDerivative · entry 1

MIHAS CONSTANTINE S · CIK 0001262930 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,848

F1 · shares: These securities consist of 10,643 Restricted Stock Units ("RSUs") that were granted on May 27, 2022, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan. Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions. The RSUs will vest in full on the earlier of (i) the first anniversary of the date of grant, or (ii) the date immediately prior to the Issuer's next regular annual shareholders meeting, subject to the Reporting Person's continued service as a non-employee director of the Issuer through such date.

F2 · balance_after: These securities consist of 10,643 RSUs and 15,205 shares of Common Stock.

SEC source: 0001822479-22-000034 · wf-form4_165403274483565.xml · nonDerivative · entry 1

PETRELLA VINCENT K · CIK 0001276410 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,848

F1 · shares: These securities consist of 10,643 Restricted Stock Units ("RSUs") that were granted on May 27, 2022, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan. Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions. The RSUs will vest in full on the earlier of (i) the first anniversary of the date of grant, or (ii) the date immediately prior to the Issuer's next regular annual shareholders meeting, subject to the Reporting Person's continued service as a non-employee director of the Issuer through such date.

F2 · balance_after: These securities consist of 10,643 RSUs and 15,205 shares of Common Stock.

SEC source: 0001822479-22-000036 · wf-form4_165403288093550.xml · nonDerivative · entry 1

Neary James · CIK 0001323057 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,848

F1 · shares: These securities consist of 10,643 Restricted Stock Units ("RSUs") that were granted on May 27, 2022, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan. Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions. The RSUs will vest in full on the earlier of (i) the first anniversary of the date of grant, or (ii) the date immediately prior to the Issuer's next regular annual shareholders meeting, subject to the Reporting Person's continued service as a non-employee director of the Issuer through such date.

F2 · balance_after: These securities consist of 10,643 RSUs and 15,205 shares of Common Stock.

SEC source: 0001822479-22-000046 · wf-form4_165403358893630.xml · nonDerivative · entry 1

Chen Ruoxi · CIK 0001769832 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,848

F1 · shares: These securities consist of 10,643 Restricted Stock Units ("RSUs") that were granted on May 27, 2022, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan. Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions. The RSUs will vest in full on the earlier of (i) the first anniversary of the date of grant, or (ii) the date immediately prior to the Issuer's next regular annual shareholders meeting, subject to the Reporting Person's continued service as a non-employee director of the Issuer through such date.

F2 · balance_after: These securities consist of 10,643 RSUs and 15,205 shares of Common Stock.

SEC source: 0001822479-22-000038 · wf-form4_165403303735749.xml · nonDerivative · entry 1

Wheadon David E. · CIK 0001789507 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,979

F1 · shares: These securities consist of 10,643 Restricted Stock Units ("RSUs") that were granted on May 27, 2022, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan. Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions. The RSUs will vest in full on the earlier of (i) the first anniversary of the date of grant, or (ii) the date immediately prior to the Issuer's next regular annual shareholders meeting, subject to the Reporting Person's continued service as a non-employee director of the Issuer through such date.

F2 · balance_after: These securities consist of 10,643 RSUs and 9,336 shares of Common Stock.

SEC source: 0001822479-22-000048 · wf-form4_165403372270660.xml · nonDerivative · entry 1

Klee Ann R. · CIK 0001796076 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 76,773

F1 · shares: These securities consist of 10,643 Restricted Stock Units ("RSUs") that were granted on May 27, 2022, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan. Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions. The RSUs will vest in full on the earlier of (i) the first anniversary of the date of grant, or (ii) the date immediately prior to the Issuer's next regular annual shareholders meeting, subject to the Reporting Person's continued service as a non-employee director of the Issuer through such date.

F2 · balance_after: Consists of 10,643 RSUs and 66,130 shares of Common Stock, including 45,371 shares of vested Common Stock and 20,759 shares of unvested Common Stock. The unvested shares of Common Stock will vest on a daily basis pro rata through May 27, 2025.

SEC source: 0001822479-22-000032 · wf-form4_165403261165333.xml · nonDerivative · entry 1

CUNNINGHAM SEAN LAURENCE · CIK 0001829753 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,848

F1 · shares: These securities consist of 10,643 Restricted Stock Units ("RSUs") that were granted on May 27, 2022, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan. Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions. The RSUs will vest in full on the earlier of (i) the first anniversary of the date of grant, or (ii) the date immediately prior to the Issuer's next regular annual shareholders meeting, subject to the Reporting Person's continued service as a non-employee director of the Issuer through such date.

F2 · balance_after: These securities consist of 10,643 RSUs and 15,205 shares of Common Stock.

SEC source: 0001822479-22-000050 · wf-form4_165409312171312.xml · nonDerivative · entry 1

Donnini David · CIK 0001309092 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,848

F1 · shares: These securities consist of 10,643 Restricted Stock Units ("RSUs") that were granted on May 27, 2022, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan. Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions. The RSUs will vest in full on the earlier of (i) the first anniversary of the date of grant, or (ii) the date immediately prior to the Issuer's next regular annual shareholders meeting, subject to the Reporting Person's continued service as a non-employee director of the Issuer through such date.

F2 · balance_after: These securities consist of 10,643 RSUs and 15,205 shares of Common Stock.

SEC source: 0001822479-22-000022 · wf-form4_164642843887831.xml · derivative · entry 2

Hammons Terry · CIK 0001801393 · SVP, GC and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 57,471

Underlying: Common Stock · 57,471 shares

Expires 2032-03-02

F3 · derivative.exercise_date: These options were granted on March 2, 2022, pursuant to the terms of a stock option agreement under the 2020 Incentive Plan. The options vest in three equal installments on each of the first three anniversaries of the date of grant, subject to the Reporting Person's continued service through each such date.

F3 · balance_after: These options were granted on March 2, 2022, pursuant to the terms of a stock option agreement under the 2020 Incentive Plan. The options vest in three equal installments on each of the first three anniversaries of the date of grant, subject to the Reporting Person's continued service through each such date.

SEC source: 0001822479-22-000022 · wf-form4_164642843887831.xml · nonDerivative · entry 1

Hammons Terry · CIK 0001801393 · SVP, GC and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,257

F1 · shares: These securities consist of Restricted Stock Units ("RSUs") that were granted on March 2, 2022, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan ("2020 Incentive Plan"). Each RSU represents the Reporting Person's right to receive one share of common stock, subject to vesting conditions. The RSUs vest in three equal installments on each of the first three anniversaries of the date of grant, subject to the Reporting Person's continued service through each such date.

F2 · balance_after: These securities consists of 31,257 RSUs.

SEC source: 0001822479-22-000021 · wf-form4_164642841992993.xml · derivative · entry 2

Rutz Michael P · CIK 0001599220 · President of Sterigenics

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 63,857

Underlying: Common Stock · 63,857 shares

Expires 2032-03-02

F3 · derivative.exercise_date: These options were granted on March 2, 2022, pursuant to the terms of a stock option agreement under the 2020 Incentive Plan. The options vest in three equal installments on each of the first three anniversaries of the date of grant, subject to the Reporting Person's continued service through each such date.

F3 · balance_after: These options were granted on March 2, 2022, pursuant to the terms of a stock option agreement under the 2020 Incentive Plan. The options vest in three equal installments on each of the first three anniversaries of the date of grant, subject to the Reporting Person's continued service through each such date.

SEC source: 0001822479-22-000021 · wf-form4_164642841992993.xml · nonDerivative · entry 1

Rutz Michael P · CIK 0001599220 · President of Sterigenics

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 577,094

F1 · shares: These securities consist of Restricted Stock Units ("RSUs") that were granted on March 2, 2022, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan ("2020 Incentive Plan"). Each RSU represents the Reporting Person's right to receive one share of common stock, subject to vesting conditions. The RSUs vest in three equal installments on each of the first three anniversaries of the date of grant, subject to the Reporting Person's continued service through each such date.

F2 · balance_after: These securities consist of 44,526 RSUs and 532,568 shares of Common Stock. 162,480 of the shares of Common Stock are vested, and 370,088 shares of Common Stock remain subject to vesting conditions. Shares of unvested Common Stock will vest on a daily basis, pro rata through May 13, 2025 (the five year anniversary of the date of grant).

SEC source: 0001822479-22-000020 · wf-form4_164642839394358.xml · derivative · entry 2

Leffler Scott J. · CIK 0001832406 · CFO and Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 95,786

Underlying: Common Stock · 95,786 shares

Expires 2032-03-02

F3 · derivative.exercise_date: These options were granted on March 2, 2022, pursuant to the terms of a stock option agreement under the 2020 Incentive Plan. The options vest in three equal installments on each of the first three anniversaries of the date of grant, subject to the Reporting Person's continued service through each such date.

F3 · balance_after: These options were granted on March 2, 2022, pursuant to the terms of a stock option agreement under the 2020 Incentive Plan. The options vest in three equal installments on each of the first three anniversaries of the date of grant, subject to the Reporting Person's continued service through each such date.

SEC source: 0001822479-22-000020 · wf-form4_164642839394358.xml · nonDerivative · entry 1

Leffler Scott J. · CIK 0001832406 · CFO and Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 738,649

F1 · shares: These securities consist of Restricted Stock Units ("RSUs") that were granted on March 2, 2022, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan ("2020 Incentive Plan"). Each RSU represents the Reporting Person's right to receive one share of common stock, subject to vesting conditions. The RSUs vest in three equal installments on each of the first three anniversaries of the date of grant, subject to the Reporting Person's continued service through each such date.

F2 · balance_after: Consists of 484,707 shares of vested Common Stock, 177,369 shares of unvested Common Stock and 76,573 RSUs. 8,600 of the unvested shares of Common Stock will vest on a daily basis, pro rata through April 3, 2022. 168,769 of the unvested shares of Common Stock will vest as of the first date on which (i) certain investment funds and entities affiliated with Warburg Pincus LLC and GTCR, LLC (the "Sponsors") have received two and one-half times their invested capital in the company and (ii) the Sponsors' internal rate of return exceeds twenty percent.

SEC source: 0001822479-22-000019 · wf-form4_164642836722086.xml · derivative · entry 3

Petras Michael B. Jr. · CIK 0001832387 · Director · Chairman & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 478,932

Underlying: Common Stock · 478,932 shares

Expires 2032-03-02

F4 · derivative.exercise_date: These options were granted on March 2, 2022, pursuant to the terms of a stock option agreement under the 2020 Incentive Plan. The options vest in three equal installments on each of the first three anniversaries of the date of grant, subject to the Reporting Person's continued service through each such date.

F4 · balance_after: These options were granted on March 2, 2022, pursuant to the terms of a stock option agreement under the 2020 Incentive Plan. The options vest in three equal installments on each of the first three anniversaries of the date of grant, subject to the Reporting Person's continued service through each such date.

SEC source: 0001822479-22-000019 · wf-form4_164642836722086.xml · nonDerivative · entry 1

Petras Michael B. Jr. · CIK 0001832387 · Director · Chairman & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 420,571

F1 · shares: These securities consist of Restricted Stock Units ("RSUs") that were granted on March 2, 2022, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan ("2020 Incentive Plan"). Each RSU represents the Reporting Person's right to receive one share of common stock, subject to vesting conditions. The RSUs vest in three equal installments on each of the first three anniversaries of the date of grant, subject to the Reporting Person's continued service through each such date.

F2 · balance_after: These securities consists of 382,871 RSUs and 37,700 shares of Common Stock.

SEC source: 0001822479-21-000075 · wf-form4_163771557509209.xml · nonDerivative · entry 1

Rutz Michael P · CIK 0001599220 · President of Sterigenics

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 552,132

F1 · shares: These securities represent the number of shares of Common Stock withheld by the Issuer to satisfy the Reporting Person's tax withholding obligations due upon the vesting of 6,522 Restricted Stock Units ("RSUs"), which represents 25% of the RSU award granted to the Reporting Person on November 20, 2020. This RSU award was granted pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan ("2020 Incentive Plan"). Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions.

F2 · balance_after: These securities consist of 19,564 RSUs and 532,568 shares of Common Stock. 128,231 of the shares of Common Stock are vested, and 404,337 shares of Common Stock remain subject to vesting conditions. Shares of unvested Common Stock will vest on a daily basis, pro rata through May 13, 2025 (the five year anniversary of the date of grant).

SEC source: 0001822479-21-000077 · wf-form4_163771562974714.xml · nonDerivative · entry 1

Leffler Scott J. · CIK 0001832406 · CFO and Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 701,206

F1 · shares: These securities represent the number of shares of Common Stock withheld by the Issuer to satisfy the Reporting Person's tax withholding obligations due upon the vesting of 13,043 Restricted Stock Units ("RSUs"), which represents 25% of the RSU award granted to the Reporting Person on November 20, 2020. This RSU award was granted pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan ("2020 Incentive Plan"). Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions.

F2 · balance_after: Consists of 454,745 shares of vested Common Stock, 207,331 shares of unvested Common Stock and 39,130 RSUs. 38,562 of the unvested shares of Common Stock will vest on a daily basis, pro rata through April 3, 2022. 168,769 of the unvested shares of Common Stock will vest as of the first date on which (i) certain investment funds and entities affiliated with Warburg Pincus LLC and GTCR, LLC (the "Sponsors") have received two and one-half times their invested capital in the company and (ii) the Sponsors' internal rate of return exceeds twenty percent.

SEC source: 0001822479-21-000076 · wf-form4_163771559892577.xml · nonDerivative · entry 1

Petras Michael B. Jr. · CIK 0001832387 · Director · Chairman & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 233,352

F1 · shares: These securities represent the number of shares of Common Stock withheld by the Issuer to satisfy the Reporting Person's tax withholding obligations due upon the vesting of 65,217 Restricted Stock Units ("RSUs"), which represents 25% of the RSU award granted to the Reporting Person on November 20, 2020. This award was granted pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan ("2020 Incentive Plan"). Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions.

F2 · balance_after: These securities consists of 195,652 RSUs and 37,700 shares of Common Stock.

SEC source: 0001822479-21-000071 · wf-form4_163675429871636.xml · derivative · entry 2

Hammons Terry · CIK 0001801393 · SVP, GC and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 37,676

Underlying: Common Stock · 37,676 shares

Expires 2031-11-11

F2 · derivative.exercise_date: These options were granted on November 11, 2021, pursuant to the terms of a stock option agreement under the 2020 Incentive Plan. The options vest in four equal installments on each of the first four anniversaries of the date of grant, subject to the Reporting Person's continued service through each such date.

SEC source: 0001822479-21-000071 · wf-form4_163675429871636.xml · nonDerivative · entry 1

Hammons Terry · CIK 0001801393 · SVP, GC and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,791

F1 · shares: These securities consist of Restricted Stock Units ("RSUs") that were granted on November 11, 2021, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan ("2020 Incentive Plan"). Each RSU represents the Reporting Person's right to receive one share of common stock, subject to vesting conditions. The RSUs vest in four equal installments on each of the first four anniversaries of the date of grant.

SEC source: 0001822479-21-000059 · wf-form4_163010123906263.xml · nonDerivative · entry 1

Rutz Michael P · CIK 0001599220 · President of Sterigenics

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 554,043

F1 · price: Represents the weighted-average share price. The lowest price at which shares were sold was $24.90 and the highest price at which shares were sold was $25.39. The Reporting Person undertakes to provide, upon request of the SEC or a security holder of the issuer, complete information regarding the number of shares sold at each price.

F2 · balance_after: Consists of 26,086 Restricted Stock Units ("RSUs") and 527,957 shares of Common Stock. The RSUs were granted on November 20, 2020, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan ("2020 Incentive Plan"). Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions. The RSUs vest in four equal installments on each of the first four anniversaries of the date of grant, subject to the Reporting Person's continued service through each such date. 98,566 of the shares of Common Stock are vested, and 429,391 shares of Common Stock remain subject to vesting conditions. Shares of unvested Common Stock will vest on a daily basis, pro rata through May 13, 2025 (the five year anniversary of the date of grant).

SEC source: 0001822479-21-000039 · wf-form4_162258820354322.xml · nonDerivative · entry 1

GEVEDA STEPHANIE · CIK 0001673202 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,205

F1 · shares: These securities consist of 9,336 Restricted Stock Units ("RSUs") that were granted on May 28, 2021, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan. Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions. The RSUs will vest in full on the earlier of (i) the first anniversary of the date of grant, or (ii) the date immediately prior to the Issuer's next regular annual shareholders meeting, subject to the Reporting Person's continued service as a non-employee director of the Issuer through such date.

F2 · balance_after: These securities consist of 9,336 RSUs and 5,869 shares of Common Stock.

SEC source: 0001822479-21-000041 · wf-form4_162258845358705.xml · nonDerivative · entry 1

MIHAS CONSTANTINE S · CIK 0001262930 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,205

F1 · shares: These securities consist of 9,336 Restricted Stock Units ("RSUs") that were granted on May 28, 2021, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan. Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions. The RSUs will vest in full on the earlier of (i) the first anniversary of the date of grant, or (ii) the date immediately prior to the Issuer's next regular annual shareholders meeting, subject to the Reporting Person's continued service as a non-employee director of the Issuer through such date.

F2 · balance_after: These securities consist of 9,336 RSUs and 5,869 shares of Common Stock.

SEC source: 0001822479-21-000043 · wf-form4_162258882165799.xml · nonDerivative · entry 1

PETRELLA VINCENT K · CIK 0001276410 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,205

F1 · shares: These securities consist of 9,336 Restricted Stock Units ("RSUs") that were granted on May 28, 2021, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan. Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions. The RSUs will vest in full on the earlier of (i) the first anniversary of the date of grant, or (ii) the date immediately prior to the Issuer's next regular annual shareholders meeting, subject to the Reporting Person's continued service as a non-employee director of the Issuer through such date.

F2 · balance_after: These securities consist of 9,336 RSUs and 5,869 shares of Common Stock.

SEC source: 0001822479-21-000038 · wf-form4_162258804936480.xml · nonDerivative · entry 1

Donnini David · CIK 0001309092 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,205

F1 · shares: These securities consist of 9,336 Restricted Stock Units ("RSUs") that were granted on May 28, 2021, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan. Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions. The RSUs will vest in full on the earlier of (i) the first anniversary of the date of grant, or (ii) the date immediately prior to the Issuer's next regular annual shareholders meeting, subject to the Reporting Person's continued service as a non-employee director of the Issuer through such date.

F2 · balance_after: These securities consist of 9,336 RSUs and 5,869 shares of Common Stock.

SEC source: 0001822479-21-000042 · wf-form4_162258858771302.xml · nonDerivative · entry 1

Neary James · CIK 0001323057 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,205

F1 · shares: These securities consist of 9,336 Restricted Stock Units ("RSUs") that were granted on May 28, 2021, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan. Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions. The RSUs will vest in full on the earlier of (i) the first anniversary of the date of grant, or (ii) the date immediately prior to the Issuer's next regular annual shareholders meeting, subject to the Reporting Person's continued service as a non-employee director of the Issuer through such date.

F2 · balance_after: These securities consist of 9,336 RSUs and 5,869 shares of Common Stock.

SEC source: 0001822479-21-000035 · wf-form4_162258765139324.xml · nonDerivative · entry 1

Chen Ruoxi · CIK 0001769832 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,205

F1 · shares: These securities consist of 9,336 Restricted Stock Units ("RSUs") that were granted on May 28, 2021, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan. Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions. The RSUs will vest in full on the earlier of (i) the first anniversary of the date of grant, or (ii) the date immediately prior to the Issuer's next regular annual shareholders meeting, subject to the Reporting Person's continued service as a non-employee director of the Issuer through such date.

F2 · balance_after: These securities consist of 9,336 RSUs and 5,869 shares of Common Stock.

SEC source: 0001822479-21-000044 · wf-form4_162258884669979.xml · nonDerivative · entry 1

Wheadon David E. · CIK 0001789507 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,336

F1 · shares: These securities consist of 9,336 Restricted Stock Units ("RSUs") that were granted on May 28, 2021, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan. Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions. The RSUs will vest in full on the earlier of (i) the first anniversary of the date of grant, or (ii) the date immediately prior to the Issuer's next regular annual shareholders meeting, subject to the Reporting Person's continued service as a non-employee director of the Issuer through such date.

SEC source: 0001822479-21-000040 · wf-form4_162258834894159.xml · nonDerivative · entry 1

Klee Ann R. · CIK 0001796076 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 66,130

F1 · shares: These securities consist of 9,336 Restricted Stock Units ("RSUs") that were granted on May 28, 2021, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan. Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions. The RSUs will vest in full on the date immediately prior to the Issuer's next regular annual shareholders meeting, subject to the Reporting Person's continued service as a non-employee director of the Issuer through such date.

F2 · balance_after: Consists of 9,336 RSUs and 56,794 shares of Common Stock, including 29,032 shares of vested Common Stock and 27,762 shares of unvested Common Stock. The unvested shares of Common Stock will vest on a daily basis pro rata through May 27, 2025.

SEC source: 0001822479-21-000037 · wf-form4_162258795898920.xml · nonDerivative · entry 1

CUNNINGHAM SEAN LAURENCE · CIK 0001829753 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,205

F1 · shares: These securities consist of 9,336 Restricted Stock Units ("RSUs") that were granted on May 28, 2021, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan. Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions. The RSUs will vest in full on the earlier of (i) the first anniversary of the date of grant, or (ii) the date immediately prior to the Issuer's next regular annual shareholders meeting, subject to the Reporting Person's continued service as a non-employee director of the Issuer through such date.

F2 · balance_after: These securities consist of 9,336 RSUs and 5,869 shares of Common Stock.

SEC source: 0001387131-21-003870 · ownership.xml · nonDerivative · entry 1

WARBURG PINCUS & CO. · CIK 0000929408 · Director · 10% owner

Warburg Pincus Private Equity XI, L.P. · CIK 0001540163 · Director · 10% owner

WP XI Partners, L.P. · CIK 0001540164 · Director · 10% owner

Warburg Pincus XI Partners, L.P. · CIK 0001540386 · Director · 10% owner

Warburg Pincus Private Equity XI-B, L.P. · CIK 0001540166 · Director · 10% owner

Bull Co-Invest L.P. · CIK 0001832693 · Director · 10% owner

Warburg Pincus XI, L.P. · CIK 0001540167 · Director · 10% owner

WP Global LLC · CIK 0001540385 · Director · 10% owner

Warburg Pincus Partners II, L.P. · CIK 0001658787 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 105,417,315

F1 · shares: On March 22, 2021, certain of the Warburg Pincus Entities (as defined below) sold a total of 13,512,582 shares of Common Stock of Sotera Health Company (the "Issuer") in an underwritten public secondary offering (the "Offering").

F2 · balance_after: Following the Offering, consists of (i) 84,093,443 shares of Common Stock of the Issuer held by Warburg Pincus Private Equity XI, L.P., Warburg Pincus XI Partners, L.P., WP XI Partners, L.P., Warburg Pincus Private Equity XI-B, L.P. (collectively, the "WP XI Funds"), (ii) 269,963 shares of Common Stock of the Issuer held by Warburg Pincus Private Equity XI-C, L.P. ("WP XI-C") and (iii) 21,053,909 shares of Common Stock of the Issuer held by Bull Co-Invest L.P., a Delaware limited partnership ("Bull Co-Invest").

F3 · ownership.nature: Warburg Pincus XI, L.P., a Delaware limited partnership ("WP XI LP"), is the general partner of the WP XI Funds. WP Global LLC ("WP Global"), is the general partner of WP XI LP. Warburg Pincus Partners II, L.P. ("WPP II") is the managing member of WP Global. Warburg Pincus Partners GP LLC ("WPP GP LLC") is the general partner of WPP II. Warburg Pincus & Co. ("WP") is the managing member of WPP GP LLC. Warburg Pincus (Cayman) XI, L.P. ("WP Cayman") is the general partner of WP XI-C. Warburg Pincus XI-C, LLC ("Warburg Pincus XI-C") is the general partner of WP Cayman. Warburg Pincus Partners II (Cayman), L.P. ("WPP II Cayman") is the managing member of Warburg Pincus XI-C. Warburg Pincus (Bermuda) Private Equity GP Ltd. ("Warburg Pincus (Bermuda)") is the general partner of WPP II Cayman. WP Bull Manager, LLC ("WP Bull Manager") is the general partner of Bull Co-Invest. WP is the managing member of WP Bull Manager, LLC.

F4 · ownership.nature: Warburg Pincus LLC ("WP LLC") is the manager of the WP XI Funds and WP XI-C. The WP XI Funds, Bull Co-Invest, WP XI-C, WP XI LP, WP Global, WPP II, WPP GP LLC, WP Cayman, Warburg Pincus XI-C, WPP II Cayman, Warburg Pincus (Bermuda), WP Bull Manager, WP LLC and WP are collectively referred to herein as the "Warburg Pincus Entities."

F5 · ownership.nature: Each Warburg Pincus Entity disclaims beneficial ownership with respect to any shares of Common Stock of the Issuer, except to the extent of its pecuniary interest in such shares of Common Stock, if any. The WP XI Funds, WP XI-C, Bull Co-Invest, WP XI LP, WP Global, WPP II, WPP GP LLC, WP, WP Cayman, WPP II Cayman, Warburg Pincus (Bermuda), Warburg Pincus XI-C and WP Bull Manager are directors-by-deputization solely for purposes of Section 16 of the Securities Exchange Act of 1934, as amended. Information with respect to each of the Warburg Pincus Entities is given solely by such Warburg Pincus Entity, and no Warburg Pincus Entity has responsibility for the accuracy or completeness of information supplied by another Warburg Pincus Entity.

SEC source: 0001387131-21-003871 · ownership.xml · nonDerivative · entry 1

WARBURG PINCUS & CO. · CIK 0000929408 · Director · 10% owner

Warburg Pincus Private Equity XI-C, L.P. · CIK 0001550877 · Director · 10% owner

Warburg Pincus (Cayman) XI, L.P. · CIK 0001554853 · Director · 10% owner

Warburg Pincus XI-C, LLC · CIK 0001554852 · Director · 10% owner

Warburg Pincus Partners II (Cayman), L.P. · CIK 0001658820 · Director · 10% owner

Warburg Pincus (Bermuda) Private Equity GP Ltd. · CIK 0001555729 · Director · 10% owner

WARBURG PINCUS LLC · CIK 0001162870 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 105,417,315

F1 · shares: On March 22, 2021, certain of the Warburg Pincus Entities (as defined below) sold a total of 13,512,582 shares of Common Stock of Sotera Health Company (the "Issuer") in an underwritten public secondary offering (the "Offering").

F2 · balance_after: Following the Offering, consists of (i) 84,093,443 shares of Common Stock of the Issuer held by Warburg Pincus Private Equity XI, L.P., Warburg Pincus XI Partners, L.P., WP XI Partners, L.P., Warburg Pincus Private Equity XI-B, L.P. (collectively, the "WP XI Funds"), (ii) 269,963 shares of Common Stock of the Issuer held by Warburg Pincus Private Equity XI-C, L.P. ("WP XI-C") and (iii) 21,053,909 shares of Common Stock of the Issuer held by Bull Co-Invest L.P., a Delaware limited partnership ("Bull Co-Invest").

F3 · ownership.nature: Warburg Pincus XI, L.P., a Delaware limited partnership ("WP XI LP"), is the general partner of the WP XI Funds. WP Global LLC ("WP Global"), is the general partner of WP XI LP. Warburg Pincus Partners II, L.P. ("WPP II") is the managing member of WP Global. Warburg Pincus Partners GP LLC ("WPP GP LLC") is the general partner of WPP II. Warburg Pincus & Co. ("WP") is the managing member of WPP GP LLC. Warburg Pincus (Cayman) XI, L.P. ("WP Cayman") is the general partner of WP XI-C. Warburg Pincus XI-C, LLC ("Warburg Pincus XI-C") is the general partner of WP Cayman. Warburg Pincus Partners II (Cayman), L.P. ("WPP II Cayman") is the managing member of Warburg Pincus XI-C. Warburg Pincus (Bermuda) Private Equity GP Ltd. ("Warburg Pincus (Bermuda)") is the general partner of WPP II Cayman. WP Bull Manager, LLC ("WP Bull Manager") is the general partner of Bull Co-Invest. WP is the managing member of WP Bull Manager, LLC.

F4 · ownership.nature: Warburg Pincus LLC ("WP LLC") is the manager of the WP XI Funds and WP XI-C. The WP XI Funds, Bull Co-Invest, WP XI-C, WP XI LP, WP Global, WPP II, WPP GP LLC, WP Cayman, Warburg Pincus XI-C, WPP II Cayman, Warburg Pincus (Bermuda), WP Bull Manager, WP LLC and WP are collectively referred to herein as the "Warburg Pincus Entities."

F5 · ownership.nature: Each Warburg Pincus Entity disclaims beneficial ownership with respect to any shares of Common Stock of the Issuer, except to the extent of its pecuniary interest in such shares of Common Stock, if any. The WP XI Funds, WP XI-C, Bull Co-Invest, WP XI LP, WP Global, WPP II, WPP GP LLC, WP, WP Cayman, WPP II Cayman, Warburg Pincus (Bermuda), Warburg Pincus XI-C and WP Bull Manager are directors-by-deputization solely for purposes of Section 16 of the Securities Exchange Act of 1934, as amended. Information with respect to each of the Warburg Pincus Entities is given solely by such Warburg Pincus Entity, and no Warburg Pincus Entity has responsibility for the accuracy or completeness of information supplied by another Warburg Pincus Entity.

SEC source: 0001628280-21-005474 · wf-form4_161661834574085.xml · nonDerivative · entry 1

Klaben Matthew J · CIK 0001369000 · SVP, GC and Secretary

10b5-1 filing: Not disclosed

Ownership: Indirect · By grantor trust

Disclosed balance after: 327,286

F1 · shares: On March 22, 2021, Mr. Klaben sold a total of 41,952 shares of Common Stock of Sotera Health Company in an underwritten public secondary offering (the "Offering").

F2 · price: Reflects a price equal to the Offering price per share less underwriting discounts and commissions payable thereon, as disclosed in the company's Prospectus 424(b)(4), filed with the United States Securities and Exchange Commission on March 18, 2021.

F3 · balance_after: Consists of 196,997 shares of vested Common Stock and 130,289 shares of unvested Common Stock as of March 22, 2021. 36,529 of the unvested shares of Common Stock will vest on a daily basis, pro rata through November 15, 2021. 93,760 of the unvested shares of Common Stock will vest as of the first date on which (i) certain investment funds and entities affiliated with Warburg Pincus LLC and GTCR, LLC (the "Sponsors") have received two and one-half times their invested capital in the company and (ii) the Sponsors' internal rate of return exceeds twenty percent.

SEC source: 0001387131-21-003869 · ownership.xml · nonDerivative · entry 1

GTCR INVESTMENT XI LLC · CIK 0001827977 · Director · 10% owner

GTCR FUND XI/A LP · CIK 0001591434 · Director · 10% owner

GTCR FUND XI/C LP · CIK 0001591436 · Director · 10% owner

GTCR CO-INVEST XI LP · CIK 0001591432 · Director · 10% owner

GTCR PARTNERS XI/A&C LP · CIK 0001828028 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 70,278,209

F1 · shares: On March 22, 2021, the GTCR XI Funds (as defined below) sold a total of 9,008,388 shares of Common Stock of Sotera Health Company (the "Issuer") in an underwritten public secondary offering (the "Offering").

F2 · balance_after: Following the Offering, consists of (i) 55,778,268 shares of Common Stock held directly by GTCR Fund XI/A LP, a Delaware limited partnership ("Fund XI/A"), (ii) 14,052,901 shares of Common Stock held directly by GTCR Fund XI/C LP, a Delaware limited partnership ("Fund XI/C"), and (iii) 447,040 shares of Common Stock held directly by GTCR Co-Invest XI LP, a Delaware limited partnership ("Co-Invest XI", and together with Fund XI/A and Fund XI/C, the "GTCR XI Funds").

F3 · ownership.nature: GTCR Partners XI/A&C LP ("Partners XI/A&C") is the general partner of each of Fund XI/A and Fund XI/C. GTCR Investment XI LLC ("Investment XI" and together with the GTCR XI Funds and Partners XI/A&C, the "GTCR Entities"), is the general partner of Co-Invest XI and Partners XI/A&C. Investment XI is managed by a board of managers (the "GTCR Board of Managers") consisting of Mark M. Anderson, Craig A. Bondy, Aaron D. Cohen, Sean L. Cunningham, Benjamin J. Daverman, David A Donnini, Constantine S. Mihas and Collin E. Roche, and no single person has voting or dispositive authority over the shares of Common Stock.

F4 · ownership.nature: Each of GTCR Partners XI/A&C, GTCR Investment XI and the GTCR Board of Managers may be deemed to share beneficial ownership of the shares of Common Stock held of record by the GTCR XI Funds, and each of the individual members of the GTCR Board of Managers disclaims beneficial ownership of the shares of Common Stock held of record by the GTCR XI Funds except to the extent of his pecuniary interest therein.

F5 · ownership.nature: Each of the reporting persons is a director-by-deputization solely for purposes of Section 16 of the Exchange Act. Information with respect to each of the GTCR Entities is given solely by such GTCR Entity, and no GTCR Entity has responsibility for the accuracy or completeness of information supplied by another GTCR Entity.

SEC source: 0001628280-21-005471 · wf-form4_161661805855061.xml · nonDerivative · entry 1

Petras Michael B. Jr. · CIK 0001832387 · Director · Chairman & CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Grantor Trust

Disclosed balance after: 6,377,185

F1 · shares: On March 22, 2021, Mr. Petras sold a total of 817,439 shares of Common Stock of Sotera Health Company in an underwritten public secondary offering (the "Offering").

F2 · price: Reflects a price equal to the Offering price per share less underwriting discounts and commissions payable thereon, as disclosed in the company's Prospectus 424(b)(4), filed with the United States Securities and Exchange Commission on March 18, 2021.

SEC source: 0000899243-20-032081 · doc4.xml · nonDerivative · entry 2

Klaben Matthew J · CIK 0001369000 · SVP, GC and Secretary

10b5-1 filing: Not disclosed

Ownership: Indirect · By grantor trust

Disclosed balance after: 369,238

F2 · price: Reflects a company repurchase price equal to the initial public offering price per share less underwriting discounts and commissions payable thereon, as disclosed in the company's Registration Statement on Form S-1.

F3 · balance_after: Consists of 220,762 shares of vested Common Stock and 148,476 shares of unvested Common Stock. 54,716 of the unvested shares of Common Stock will vest on a daily basis, pro rata through November 15, 2021. 93,760 of the unvested shares of Common Stock will vest as of the first date on which (i) certain investment funds and entities affiliated with Warburg Pincus LLC and GTCR, LLC (the "Sponsors") have received two and one-half times their invested capital in the company and (ii) the Sponsors' internal rate of return exceeds twenty percent.

SEC source: 0000899243-20-032083 · doc4.xml · nonDerivative · entry 2

Leffler Scott J. · CIK 0001832406 · CFO and Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 705,100

F3 · price: Reflects a company repurchase price equal to the initial public offering price per share less underwriting discounts and commissions payable thereon, as disclosed in the company's Registration Statement on Form S-1.

F4 · balance_after: Consists of 347,109 shares of vested Common Stock, 305,818 shares of unvested Common Stock and 52,173 RSUs. 137,049 of the unvested shares of Common Stock will vest on a daily basis, pro rata through April 3, 2022. 168,769 of the unvested shares of Common Stock will vest as of the first date on which (i) certain investment funds and entities affiliated with Warburg Pincus LLC and GTCR, LLC (the "Sponsors") have received two and one-half times their invested capital in the company and (ii) the Sponsors' internal rate of return exceeds twenty percent. See Footnote #1 for information regarding the vesting of the RSUs.

SEC source: 0000899243-20-032076 · doc4.xml · nonDerivative · entry 3

Petras Michael B. Jr. · CIK 0001832387 · Director · Chairman & CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Grantor Trust

Disclosed balance after: 7,194,624

F2 · price: Reflects a company repurchase price equal to the initial public offering price per share less underwriting discounts and commissions payable thereon, as disclosed in the company's Registration Statement on Form S-1.

SEC source: 0000899243-20-032076 · doc4.xml · nonDerivative · entry 2

Petras Michael B. Jr. · CIK 0001832387 · Director · Chairman & CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Grantor Retained Annuity Trust

Disclosed balance after: 0

F2 · price: Reflects a company repurchase price equal to the initial public offering price per share less underwriting discounts and commissions payable thereon, as disclosed in the company's Registration Statement on Form S-1.

SEC source: 0000899243-20-032066 · doc4.xml · nonDerivative · entry 1

GEVEDA STEPHANIE · CIK 0001673202 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,869

F1 · shares: These securities consist of 5,869 Restricted Stock Units ("RSUs") that were granted on November 20, 2020, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan. Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions. The RSUs will vest in full on the date immediately prior to the Issuer's next regular annual shareholders meeting, subject to the Reporting Person's continued service as a non-employee director of the Issuer through such date.

SEC source: 0000899243-20-032078 · doc4.xml · nonDerivative · entry 1

MIHAS CONSTANTINE S · CIK 0001262930 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,869

F1 · shares: These securities consist of 5,869 Restricted Stock Units ("RSUs") that were granted on November 20, 2020, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan. Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions. The RSUs will vest in full on the date immediately prior to the Issuer's next regular annual shareholders meeting, subject to the Reporting Person's continued service as a non-employee director of the Issuer through such date.

SEC source: 0000899243-20-032068 · doc4.xml · nonDerivative · entry 1

PETRELLA VINCENT K · CIK 0001276410 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,869

F1 · shares: These securities consist of Restricted Stock Units ("RSUs") that were granted on November 20, 2020, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan. Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions. The RSUs will vest in full on the date immediately prior to the Issuer's next regular annual shareholders meeting, subject to the Reporting Person's continued service as a non-employee director of the Issuer through such date.

SEC source: 0000899243-20-032072 · doc4.xml · nonDerivative · entry 1

Donnini David · CIK 0001309092 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,869

F1 · shares: These securities consist of 5,869 Restricted Stock Units ("RSUs") that were granted on November 20, 2020, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan. Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions. The RSUs will vest in full on the date immediately prior to the Issuer's next regular annual shareholders meeting, subject to the Reporting Person's continued service as a non-employee director of the Issuer through such date.

SEC source: 0000899243-20-032074 · doc4.xml · nonDerivative · entry 1

Neary James · CIK 0001323057 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,869

F1 · shares: These securities consist of 5,869 Restricted Stock Units ("RSUs") that were granted on November 20, 2020, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan. Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions. The RSUs will vest in full on the date immediately prior to the Issuer's next regular annual shareholders meeting, subject to the Reporting Person's continued service as a non-employee director of the Issuer through such date.

SEC source: 0000899243-20-032081 · doc4.xml · derivative · entry 3

Klaben Matthew J · CIK 0001369000 · SVP, GC and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 134,161

Underlying: Common Stock · 134,161 shares

Expires 2030-11-20

F4 · derivative.exercise_date: These options were granted on November 20, 2020, pursuant to the terms of a stock option agreement under the 2020 Incentive Plan. The options vest in four equal installments on each of the first four anniversaries of the date of grant, subject to the Reporting Person's continued service through each such date.

SEC source: 0000899243-20-032081 · doc4.xml · nonDerivative · entry 1

Klaben Matthew J · CIK 0001369000 · SVP, GC and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,304

F1 · shares: These securities consist of Restricted Stock Units ("RSUs") that were granted on November 20, 2020, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan ("2020 Incentive Plan"). Each RSU represents the Reporting Person's right to receive one share of common stock, subject to vesting conditions. The RSUs vest in four equal installments on each of the first four anniversaries of the date of grant, subject to the Reporting Person's continued service through each such date.