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GTCR FUND XI/A LP

Disclosed activity across 1 company

Tapewire entity
46803
SEC CIK
0001591434

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Latest disclosed role at each company.

No relationships currently tracked through insider filings.

Disclosed balances

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Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

No balances currently tracked through insider filings.

Past disclosures · reporting ended (1)

No longer tracked through insider filings. These historical balances do not imply present ownership or a zero position.

Sotera Health Co

Report date May 13, 2026 · Filed May 15, 2026

Jointly reported with GTCR INVESTMENT XI LLC, GTCR FUND XI/C LP, GTCR CO-INVEST XI LP, GTCR PARTNERS XI/A&C LP

Section 16 reporting ended · disclosed 2026-05-15. Current position is not established by this disclosure.

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common Stock, $0.01 par value per share ("Common Stock")SEC Table I · non-derivativeIndirectSee Footnote0 Reported balance After 2026-05-13 transaction · row 1 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes.
1 source row

Row 1 · 2026-05-13 · Sale · Disposed 12,735,301 · Balance 0

F1: On May 13, 2026, GTCR Fund XI/A LP, a Delaware limited partnership ("Fund XI/A"), GTCR Fund XI/C LP, a Delaware limited partnership ("Fund XI/C"), and 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"), sold a total of 12,735,301 shares of Common Stock of Sotera Health Company in an underwritten public secondary offering.

F2: 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, Aaron D. Cohen, Sean L. Cunningham, 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.

F3: Each of Partners XI/A&C, 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.

F4: 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.

Filing footnotes · ownership attribution and instrument terms

F1: On May 13, 2026, GTCR Fund XI/A LP, a Delaware limited partnership ("Fund XI/A"), GTCR Fund XI/C LP, a Delaware limited partnership ("Fund XI/C"), and 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"), sold a total of 12,735,301 shares of Common Stock of Sotera Health Company in an underwritten public secondary offering.

F2: 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, Aaron D. Cohen, Sean L. Cunningham, 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.

F3: Each of Partners XI/A&C, 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.

F4: 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.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
May 13, 2026 Filed May 15, 2026 20:41 UTC Sotera Health Co SHC · Entity 3869 SaleCommon Stock, $0.01 par value per share ("Common Stock") 12,735,301 $15.17 $193,169,045.57
Disclosure

SEC source: 0001193125-26-227029 · 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: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 0

F1 · shares: On May 13, 2026, GTCR Fund XI/A LP, a Delaware limited partnership ("Fund XI/A"), GTCR Fund XI/C LP, a Delaware limited partnership ("Fund XI/C"), and 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"), sold a total of 12,735,301 shares of Common Stock of Sotera Health Company in an underwritten public secondary offering.

F2 · 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, Aaron D. Cohen, Sean L. Cunningham, 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.

F3 · ownership.nature: Each of Partners XI/A&C, 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.

F4 · 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.

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March 06, 2026 Filed Mar 10, 2026 22:10 UTC Sotera Health Co SHC · Entity 3869 SaleCommon Stock, $0.01 par value per share ("Common Stock") 10,000,000 $15.27 $152,700,000.00
Disclosure

SEC source: 0001193125-26-100568 · 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: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 12,735,301

F1 · shares: On March 6, 2026, the GTCR XI Funds (as defined below) sold a total of 10,000,000 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) 10,107,727 shares of Common Stock held directly by GTCR Fund XI/A LP, a Delaware limited partnership ("Fund XI/A"), (ii) 2,546,564 shares of Common Stock held directly by GTCR Fund XI/C LP, a Delaware limited partnership ("Fund XI/C"), and (iii) 81,010 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, Aaron D. Cohen, Sean L. Cunningham, 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.

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December 03, 2025 Filed Dec 6, 2025 01:10 UTC Sotera Health Co SHC · Entity 3869 SaleCommon Stock, $0.01 par value per share ("Common Stock") 6,480,000 $16.33 $105,818,400.00
Disclosure

SEC source: 0001193125-25-310122 · 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: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 22,735,301

F1 · shares: On December 3, 2025, the GTCR XI Funds (as defined below) sold a total of 6,480,000 shares of Common Stock of Sotera Health Company (the "Issuer").

F2 · balance_after: Following the sale, consists of (i) 18,044,507 shares of Common Stock held directly by GTCR Fund XI/A LP, a Delaware limited partnership ("Fund XI/A"), (ii) 4,546,174 shares of Common Stock held directly by GTCR Fund XI/C LP, a Delaware limited partnership ("Fund XI/C"), and (iii) 144,620 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, Aaron D. Cohen, Sean L. Cunningham, 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.

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November 10, 2025 Filed Nov 12, 2025 22:06 UTC Sotera Health Co SHC · Entity 3869 SaleCommon Stock, $0.01 par value per share ("Common Stock") 12,000,000 $15.65 $187,812,000.00
Disclosure

SEC source: 0001193125-25-277915 · 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: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 29,215,301

F1 · shares: On November 10, 2025, the GTCR XI Funds (as defined below) sold a total of 12,000,000 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) 23,187,541 shares of Common Stock held directly by GTCR Fund XI/A LP, a Delaware limited partnership ("Fund XI/A"), (ii) 5,841,921 shares of Common Stock held directly by GTCR Fund XI/C LP, a Delaware limited partnership ("Fund XI/C"), and (iii) 185,839 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, Aaron D. Cohen, Sean L. Cunningham, 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.

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September 05, 2025 Filed Sep 10, 2025 00:41 UTC Sotera Health Co SHC · Entity 3869 SaleCommon Stock, $0.01 par value per share ("Common Stock") 8,000,000 $15.11 $120,888,000.00
Disclosure

SEC source: 0001193125-25-199493 · 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: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 41,215,301

F1 · shares: On September 5, 2025, the GTCR XI Funds (as defined below) sold a total of 8,000,000 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) 32,711,677 shares of Common Stock held directly by GTCR Fund XI/A LP, a Delaware limited partnership ("Fund XI/A"), (ii) 8,241,453 shares of Common Stock held directly by GTCR Fund XI/C LP, a Delaware limited partnership ("Fund XI/C"), and (iii) 262,171 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, Aaron D. Cohen, Sean L. Cunningham, 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.

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September 06, 2024 Filed Sep 9, 2024 21:36 UTC Sotera Health Co SHC · Entity 3869 SaleCommon Stock, $0.01 par value per share ("Common Stock") 10,000,000 $15.03 $150,300,000.00
Disclosure

SEC source: 0001999371-24-011707 · 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 CO-INVEST XI LP · CIK 0001591432 · Director · 10% owner

GTCR FUND XI/C LP · CIK 0001591436 · 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: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 49,215,301

F1 · shares: On September 6, 2024, the GTCR XI Funds (as defined below) sold a total of 10,000,000 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) 39,061,101 shares of Common Stock held directly by GTCR Fund XI/A LP, a Delaware limited partnership ("Fund XI/A"), (ii) 9,841,141 shares of Common Stock held directly by GTCR Fund XI/C LP, a Delaware limited partnership ("Fund XI/C"), and (iii) 313,059 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, Aaron D. Cohen, Sean L. Cunningham, 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.

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March 04, 2024 Filed Mar 6, 2024 22:35 UTC Sotera Health Co SHC · Entity 3869 SaleCommon Stock, $0.01 par value per share ("Common Stock") 11,062,908 $14.31 $158,282,556.21
Disclosure

SEC source: 0001999371-24-003174 · sotera-form4_030424.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: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 59,215,301

F1 · shares: On March 4, 2024, the GTCR XI Funds (as defined below) sold a total of 11,062,908 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) 46,997,881 shares of Common Stock held directly by GTCR Fund XI/A LP, a Delaware limited partnership ("Fund XI/A"), (ii) 11,840,751 shares of Common Stock held directly by GTCR Fund XI/C LP, a Delaware limited partnership ("Fund XI/C"), and (iii) 376,669 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, 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.

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March 22, 2021 Filed Mar 25, 2021 00:57 UTC Sotera Health Co SHC · Entity 3869 SaleCommon Stock, $0.01 par value per share ("Common Stock") 9,008,388 $26.12 $235,321,615.53
Disclosure

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.

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Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.