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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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"These securities consist of 14,970 RSUs and 19,132 shares of Common Stock."}],"balance_after":34102,"source":{"system":"sec-edgar","filing":"0001193125-26-242181","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1674993/000119312526242181/ownership.xml","form_type":"4"}},{"id":761182,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":29981,"kind":"person","name":"Wheadon David E.","position":1,"cik":"0001789507","reported_name":"Wheadon David E.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock, $0.01 par value per share (\"Common Stock\")","published_at":"2026-05-27T21:19:20.000Z","date":"2026-05-22","kind":"grant","planned":false,"acquired":true,"shares":14970,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These securities consist of 14,970 restricted stock units (\"RSUs\") that were granted on May 22, 2026, pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incenctive 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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"These securities consist of 14,970 RSUs and 74,912 shares of Common Stock."}],"balance_after":89882,"source":{"system":"sec-edgar","filing":"0001193125-26-242177","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1789507/000119312526242177/ownership.xml","form_type":"4"}},{"id":777794,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":15793,"kind":"person","name":"WARBURG PINCUS & CO.","position":1,"cik":"0000929408","reported_name":"WARBURG PINCUS & CO.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":40231,"kind":"person","name":"Warburg Pincus (Bermuda) Private Equity GP Ltd.","position":2,"cik":"0001555729","reported_name":"Warburg Pincus (Bermuda) Private Equity GP Ltd.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47039,"kind":"person","name":"Warburg Pincus (Cayman) XI, L.P.","position":3,"cik":"0001554853","reported_name":"Warburg Pincus (Cayman) XI, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":15794,"kind":"person","name":"WARBURG PINCUS LLC","position":4,"cik":"0001162870","reported_name":"WARBURG PINCUS LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":15792,"kind":"person","name":"Warburg Pincus Partners GP LLC","position":5,"cik":"0001621224","reported_name":"Warburg Pincus Partners GP LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":40230,"kind":"person","name":"Warburg Pincus Partners II (Cayman), L.P.","position":6,"cik":"0001658820","reported_name":"Warburg Pincus Partners II (Cayman), L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47040,"kind":"person","name":"Warburg Pincus Private Equity XI-C, L.P.","position":7,"cik":"0001550877","reported_name":"Warburg Pincus Private Equity XI-C, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47041,"kind":"person","name":"Warburg Pincus XI-C, LLC","position":8,"cik":"0001554852","reported_name":"Warburg Pincus XI-C, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock, $0.01 par value per share (\"Common Stock\")","published_at":"2026-05-15T20:54:04.000Z","date":"2026-05-13","kind":"sale","planned":false,"acquired":false,"shares":19102952,"price":15.168,"value":289753575.936,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On May 13, 2026, certain of the Warburg Pincus Entities (as defined below) sold a total of 19,102,952 shares of Common Stock of Sotera Health Company (the \"Issuer\") in an underwritten public secondary offering (the \"Offering\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Warburg Pincus XI, L.P., a Delaware limited partnership (\"WP XI GP\"), is the general partner of each of (i) Warburg Pincus Private Equity XI, L.P. (\"WP XI\"), (ii) Warburg Pincus Private Equity XI-B, L.P. (\"WP XI-B\"), (iii) WP XI Partners, L.P. (\"WP XI Partners\") and (iv) Warburg Pincus XI Partners, L.P. (\"Warburg Pincus XI Partners\"). WP Global LLC (\"WP Global\"), is the general partner of WP XI GP. 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 XI Cayman GP\"), is the general partner of Warburg Pincus Private Equity XI-C, L.P. (\"WP XI-C\" and, together with WP XI,WP XI-B, WP XI Partners and Warburg Pincus XI Partners, the \"WP XI Funds\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The WP XI Funds, Bull Co-Invest L.P. (\"Bull Co-Invest\"), Bull Holdco L.P. (\"Bull Holdco\"), WP Global, WPP II, WPP GP LLC, WP XI Cayman GP, WP XI-C LLC, WPP II Cayman, WP Bermuda GP, WP Bull Manager, WP LLC and WP are collectively referred to herein as the \"Warburg Pincus Entities.\""},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"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, Bull Co-Invest, Bull Holdco, WP Global, WPP II, WPP GP LLC, WP XI Cayman GP, WP XI-C LLC, WPP II Cayman, WP Bermuda GP, WP Bull Manager, WP LLC and WP 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Warburg Pincus XI-C, LLC (\"WP XI-C LLC\"), is the general partner of WP XI Cayman GP. Warburg Pincus Partners II (Cayman), L.P. (\"WPP II Cayman\"), is the managing member of WP XI-C LLC. Warburg Pincus (Bermuda) Private Equity GP Ltd. (\"WP Bermuda GP\"), 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 managing member of WP Bull Manager. Warburg Pincus LLC, a New York limited liability company (\"WP LLC\"), is the manager of the WP XI Funds. The WP XI Funds share limited partnership ownership in Bull Holdco on a pro rata basis in accordance with their respective numbers of Contributed Shares."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001999371-26-010903","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/929408/000199937126010903/ownership.xml","form_type":"4"}},{"id":778158,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":15793,"kind":"person","name":"WARBURG PINCUS & CO.","position":1,"cik":"0000929408","reported_name":"WARBURG PINCUS & CO.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47101,"kind":"person","name":"Bull Co-Invest L.P.","position":2,"cik":"0001832693","reported_name":"Bull Co-Invest L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47102,"kind":"person","name":"Warburg Pincus Private Equity XI, L.P.","position":3,"cik":"0001540163","reported_name":"Warburg Pincus Private Equity XI, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47103,"kind":"person","name":"Bull Holdco L.P.","position":4,"cik":"0002014247","reported_name":"Bull Holdco L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47104,"kind":"person","name":"Warburg Pincus Partners II, L.P.","position":5,"cik":"0001658787","reported_name":"Warburg Pincus Partners II, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47105,"kind":"person","name":"Warburg Pincus Private Equity XI-B, L.P.","position":6,"cik":"0001540166","reported_name":"Warburg Pincus Private Equity XI-B, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47106,"kind":"person","name":"Warburg Pincus XI Partners, L.P.","position":7,"cik":"0001540386","reported_name":"Warburg Pincus XI Partners, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47107,"kind":"person","name":"Warburg Pincus XI, L.P.","position":8,"cik":"0001540167","reported_name":"Warburg Pincus XI, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47108,"kind":"person","name":"WP Global LLC","position":9,"cik":"0001540385","reported_name":"WP Global LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47109,"kind":"person","name":"WP XI Partners, L.P.","position":10,"cik":"0001540164","reported_name":"WP XI Partners, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock, $0.01 par value per share (\"Common Stock\")","published_at":"2026-05-15T20:48:45.000Z","date":"2026-05-13","kind":"sale","planned":false,"acquired":false,"shares":19102952,"price":15.168,"value":289753575.936,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On May 13, 2026, certain of the Warburg Pincus Entities (as defined below) sold a total of 19,102,952 shares of Common Stock of Sotera Health Company (the \"Issuer\") in an underwritten public secondary offering (the \"Offering\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Warburg Pincus XI, L.P., a Delaware limited partnership (\"WP XI GP\"), is the general partner of each of (i) Warburg Pincus Private Equity XI, L.P. (\"WP XI\"), (ii) Warburg Pincus Private Equity XI-B, L.P. (\"WP XI-B\"), (iii) WP XI Partners, L.P. (\"WP XI Partners\") and (iv) Warburg Pincus XI Partners, L.P. (\"Warburg Pincus XI Partners\"). WP Global LLC (\"WP Global\"), is the general partner of WP XI GP. 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 XI Cayman GP\"), is the general partner of Warburg Pincus Private Equity XI-C, L.P. (\"WP XI-C\" and, together with WP XI, WP XI-B, WP XI Partners and Warburg Pincus XI Partners, the \"WP XI Funds\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The WP XI Funds, Bull Co-Invest L.P. (\"Bull Co-Invest\"), Bull Holdco L.P. (\"Bull Holdco\"), WP Global, WPP II, WPP GP LLC, WP XI Cayman GP, WP XI-C LLC, WPP II Cayman, WP Bermuda GP, WP Bull Manager, WP LLC and WP are collectively referred to herein as the \"Warburg Pincus Entities."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"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, Bull Co-Invest, Bull Holdco, WP Global, WPP II, WPP GP LLC, WP XI Cayman GP, WP XI-C LLC, WPP II Cayman, WP Bermuda GP, WP Bull Manager, WP LLC and WP 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Warburg Pincus XI-C, LLC (\"WP XI-C LLC\"), is the general partner of WP XI Cayman GP. Warburg Pincus Partners II (Cayman), L.P. (\"WPP II Cayman\"), is the managing member of WP XI-C LLC. Warburg Pincus (Bermuda) Private Equity GP Ltd. (\"WP Bermuda GP\"), 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 managing member of WP Bull Manager. Warburg Pincus LLC, a New York limited liability company (\"WP LLC\"), is the manager of the WP XI Funds. The WP XI Funds share limited partnership ownership in Bull Holdco on a pro rata basis in accordance with their respective numbers of Contributed Shares."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001999371-26-010899","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1832693/000199937126010899/ownership.xml","form_type":"4"}},{"id":776640,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":46802,"kind":"person","name":"GTCR INVESTMENT XI LLC","position":1,"cik":"0001827977","reported_name":"GTCR INVESTMENT XI LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":46803,"kind":"person","name":"GTCR FUND XI/A LP","position":2,"cik":"0001591434","reported_name":"GTCR FUND XI/A LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":46804,"kind":"person","name":"GTCR FUND XI/C LP","position":3,"cik":"0001591436","reported_name":"GTCR FUND XI/C LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":46805,"kind":"person","name":"GTCR CO-INVEST XI LP","position":4,"cik":"0001591432","reported_name":"GTCR CO-INVEST XI LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":46806,"kind":"person","name":"GTCR PARTNERS XI/A&C LP","position":5,"cik":"0001828028","reported_name":"GTCR PARTNERS XI/A&C LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock, $0.01 par value per share (\"Common Stock\")","published_at":"2026-05-15T20:41:26.000Z","date":"2026-05-13","kind":"sale","planned":false,"acquired":false,"shares":12735301,"price":15.168,"value":193169045.568,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"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."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001193125-26-227029","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1591434/000119312526227029/ownership.xml","form_type":"4"}},{"id":819501,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":12040,"kind":"person","name":"DIMITRIEF ALEXANDER","position":1,"cik":"0001614732","reported_name":"DIMITRIEF ALEXANDER","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Former SVP, GC and Sec."}}],"security":"Common Stock, $0.01 par value per share (\"Common Stock\")","published_at":"2026-04-02T20:56:55.000Z","date":"2026-03-31","kind":"tax_withholding","planned":false,"acquired":false,"shares":7941,"price":14.34,"value":113873.94,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"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 17,135 Restricted Stock Units (\"RSUs\") granted to the Reporting Person on March 4, 2024. This award was granted pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Omnibus Incentive Plan (\"2020 Incentive Plan\"). The 17,135 RSUs under this award vested pursuant to the terms of the RSU agreement upon the Reporting Person's retirement on March 31, 2026."}],"balance_after":312040,"source":{"system":"sec-edgar","filing":"0001193125-26-140422","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1614732/000119312526140422/ownership.xml","form_type":"4"}},{"id":851992,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":15793,"kind":"person","name":"WARBURG PINCUS & CO.","position":1,"cik":"0000929408","reported_name":"WARBURG PINCUS & CO.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":40231,"kind":"person","name":"Warburg Pincus (Bermuda) Private Equity GP Ltd.","position":2,"cik":"0001555729","reported_name":"Warburg Pincus (Bermuda) Private Equity GP Ltd.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47039,"kind":"person","name":"Warburg Pincus (Cayman) XI, L.P.","position":3,"cik":"0001554853","reported_name":"Warburg Pincus (Cayman) XI, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":15794,"kind":"person","name":"WARBURG PINCUS LLC","position":4,"cik":"0001162870","reported_name":"WARBURG PINCUS LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":15792,"kind":"person","name":"Warburg Pincus Partners GP LLC","position":5,"cik":"0001621224","reported_name":"Warburg Pincus Partners GP LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":40230,"kind":"person","name":"Warburg Pincus Partners II (Cayman), L.P.","position":6,"cik":"0001658820","reported_name":"Warburg Pincus Partners II (Cayman), L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47040,"kind":"person","name":"Warburg Pincus Private Equity XI-C, L.P.","position":7,"cik":"0001550877","reported_name":"Warburg Pincus Private Equity XI-C, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47041,"kind":"person","name":"Warburg Pincus XI-C, LLC","position":8,"cik":"0001554852","reported_name":"Warburg Pincus XI-C, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock, $0.01 par value per share (\"Common Stock\")","published_at":"2026-03-10T23:50:42.000Z","date":"2026-03-06","kind":"sale","planned":false,"acquired":false,"shares":15000000,"price":15.27,"value":229050000.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On March 6, 2026, certain of the Warburg Pincus Entities (as defined below) sold a total of 15,000,000 shares of Common Stock of Sotera Health Company (the \"Issuer\") in an underwritten public secondary offering (the \"Offering\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Following the Offering, consists of (i) 15,287,717 shares of Common Stock of the Issuer held by Bull Holdco L.P. (\"Bull Holdco\") and (iii) 3,815,235 shares of Common Stock of the Issuer held by Bull Co-Invest L.P., a Delaware limited partnership (\"Bull Co-Invest\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Warburg Pincus XI, L.P., a Delaware limited partnership (\"WP XI GP\"), is the general partner of each of (i) Warburg Pincus Private Equity XI, L.P. (\"WP XI\"), (ii)Warburg Pincus Private Equity XI-B, L.P. (\"WP XI-B\"), (iii) WP XI Partners, L.P. (\"WP XI Partners\") and (iv) Warburg Pincus XI Partners, L.P. (\"Warburg Pincus XI Partners\"). WP Global LLC (\"WP Global\"), is the general partner of WP XI GP. 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 XI Cayman GP\"), is the general partner of Warburg Pincus Private Equity XI-C, L.P. (\"WP XI-C\" and, together with WP XI,WP XI-B, WP XI Partners and Warburg Pincus XI Partners, the \"WP XI Funds\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The WP XI Funds, Bull Co-Invest, Bull Holdco, WP Global, WPP II, WPP GP LLC, WP XI Cayman GP, WP XI-C LLC, WPP II Cayman, WP Bermuda GP, WP Bull Manager, WP LLC and WP are collectively referred to herein as the \"Warburg Pincus Entities.\""},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"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, Bull Co-Invest, Bull Holdco, WP Global, WPP II, WPP GP LLC, WP XI Cayman GP, WP XI-C LLC, WPP II Cayman, WP Bermuda GP, WP Bull Manager, WP LLC and WP 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Warburg Pincus XI-C, LLC (\"WP XI-C LLC\"), is the general partner of WP XI Cayman GP. Warburg Pincus Partners II (Cayman), L.P. (\"WPP II Cayman\"), is the managing member of WP XI-C LLC. Warburg Pincus (Bermuda) Private Equity GP Ltd. (\"WP Bermuda GP\"), 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 managing member of WP Bull Manager. Warburg Pincus LLC, a New York limited liability company (\"WP LLC\"), is the manager of the WP XI Funds. The WP XI Funds share limited partnership ownership in Bull Holdco on a pro rata basis in accordance with their respective numbers of Contributed Shares."}],"balance_after":19102952,"source":{"system":"sec-edgar","filing":"0001999371-26-005534","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/929408/000199937126005534/ownership.xml","form_type":"4"}},{"id":852339,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":15793,"kind":"person","name":"WARBURG PINCUS & CO.","position":1,"cik":"0000929408","reported_name":"WARBURG PINCUS & CO.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47101,"kind":"person","name":"Bull Co-Invest L.P.","position":2,"cik":"0001832693","reported_name":"Bull Co-Invest L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47102,"kind":"person","name":"Warburg Pincus Private Equity XI, L.P.","position":3,"cik":"0001540163","reported_name":"Warburg Pincus Private Equity XI, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47103,"kind":"person","name":"Bull Holdco L.P.","position":4,"cik":"0002014247","reported_name":"Bull Holdco L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47104,"kind":"person","name":"Warburg Pincus Partners II, L.P.","position":5,"cik":"0001658787","reported_name":"Warburg Pincus Partners II, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47105,"kind":"person","name":"Warburg Pincus Private Equity XI-B, L.P.","position":6,"cik":"0001540166","reported_name":"Warburg Pincus Private Equity XI-B, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47106,"kind":"person","name":"Warburg Pincus XI Partners, L.P.","position":7,"cik":"0001540386","reported_name":"Warburg Pincus XI Partners, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47107,"kind":"person","name":"Warburg Pincus XI, L.P.","position":8,"cik":"0001540167","reported_name":"Warburg Pincus XI, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47108,"kind":"person","name":"WP Global LLC","position":9,"cik":"0001540385","reported_name":"WP Global LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47109,"kind":"person","name":"WP XI Partners, L.P.","position":10,"cik":"0001540164","reported_name":"WP XI Partners, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock, $0.01 par value per share (\"Common Stock\")","published_at":"2026-03-10T23:49:10.000Z","date":"2026-03-06","kind":"sale","planned":false,"acquired":false,"shares":15000000,"price":15.27,"value":229050000.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On March 6, 2026, certain of the Warburg Pincus Entities (as defined below) sold a total of 15,000,000 shares of Common Stock of Sotera Health Company (the \"Issuer\") in an underwritten public secondary offering (the \"Offering\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Following the Offering, consists of (i) 15,287,717 shares of Common Stock of the Issuer held by Bull Holdco L.P. (\"Bull Holdco\") and (ii) 3,815,235 shares of Common Stock of the Issuer held by Bull Co-Invest L.P., a Delaware limited partnership (\"Bull Co-Invest\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Warburg Pincus XI, L.P., a Delaware limited partnership (\"WP XI GP\"), is the general partner of each of (i) Warburg Pincus Private Equity XI, L.P. (\"WP XI\"), (ii) Warburg Pincus Private Equity XI-B, L.P. (\"WP XI-B\"), (iii) WP XI Partners, L.P. (\"WP XI Partners\") and (iv) Warburg Pincus XI Partners, L.P. (\"Warburg Pincus XI Partners\"). WP Global LLC (\"WP Global\"), is the general partner of WP XI GP. 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 XI Cayman GP\"), is the general partner of Warburg Pincus Private Equity XI-C, L.P. (\"WP XI-C\" and, together with WP XI, WP XI-B, WP XI Partners and Warburg Pincus XI Partners, the \"WP XI Funds\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The WP XI Funds, Bull Co-Invest, Bull Holdco, WP Global, WPP II, WPP GP LLC, WP XI Cayman GP, WP XI-C LLC, WPP II Cayman, WP Bermuda GP, WP Bull Manager, WP LLC and WP are collectively referred to herein as the \"Warburg Pincus Entities.\""},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"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, Bull Co-Invest, Bull Holdco, WP Global, WPP II, WPP GP LLC, WP XI Cayman GP, WP XI-C LLC, WPP II Cayman, WP Bermuda GP, WP Bull Manager, WP LLC and WP 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Warburg Pincus XI-C, LLC (\"WP XI-C LLC\"), is the general partner of WP XI Cayman GP. Warburg Pincus Partners II (Cayman), L.P. (\"WPP II Cayman\"), is the managing member of WP XI-C LLC. Warburg Pincus (Bermuda) Private Equity GP Ltd. (\"WP Bermuda GP\"), 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 managing member of WP Bull Manager. Warburg Pincus LLC, a New York limited liability company (\"WP LLC\"), is the manager of the WP XI Funds. The WP XI Funds share limited partnership ownership in Bull Holdco on a pro rata basis in accordance with their respective numbers of Contributed Shares."}],"balance_after":19102952,"source":{"system":"sec-edgar","filing":"0001999371-26-005532","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1832693/000199937126005532/ownership.xml","form_type":"4"}},{"id":850307,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":46802,"kind":"person","name":"GTCR INVESTMENT XI LLC","position":1,"cik":"0001827977","reported_name":"GTCR INVESTMENT XI LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":46803,"kind":"person","name":"GTCR FUND XI/A LP","position":2,"cik":"0001591434","reported_name":"GTCR FUND XI/A LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":46804,"kind":"person","name":"GTCR FUND XI/C LP","position":3,"cik":"0001591436","reported_name":"GTCR FUND XI/C LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":46805,"kind":"person","name":"GTCR CO-INVEST XI LP","position":4,"cik":"0001591432","reported_name":"GTCR CO-INVEST XI LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":46806,"kind":"person","name":"GTCR PARTNERS XI/A&C LP","position":5,"cik":"0001828028","reported_name":"GTCR PARTNERS XI/A&C LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock, $0.01 par value per share (\"Common Stock\")","published_at":"2026-03-10T22:10:40.000Z","date":"2026-03-06","kind":"sale","planned":false,"acquired":false,"shares":10000000,"price":15.27,"value":152700000.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"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\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"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\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"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."}],"balance_after":12735301,"source":{"system":"sec-edgar","filing":"0001193125-26-100568","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1591434/000119312526100568/ownership.xml","form_type":"4"}},{"id":860464,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":21490,"kind":"person","name":"Petras Michael B. Jr.","position":1,"cik":"0001832387","reported_name":"Petras Michael B. 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The SAUs generally vest annually in 60%, 20% and 20% installments, respectively, commencing March 2027, subject to performance."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"These securities consist of a maximum number of SAUs that were granted on March 2, 2026, pursuant to the terms of a SAU Agreement under the 2020 Incentive Plan. Each SAU represents the Reporting Person's right to receive one share of Common Stock, subject to stock price-related peformance conditions. The SAUs generally vest annually in 60%, 20% and 20% installments, respectively, commencing March 2027, subject to performance."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"These securities consist of a maximum number of SAUs that were granted on March 2, 2026, pursuant to the terms of a SAU Agreement under the 2020 Incentive Plan. Each SAU represents the Reporting Person's right to receive one share of Common Stock, subject to stock price-related peformance conditions. The SAUs generally vest annually in 60%, 20% and 20% installments, respectively, commencing March 2027, subject to performance."}],"balance_after":120124,"derivative":{"underlying":"Common Stock","underlying_shares":120124},"source":{"system":"sec-edgar","filing":"0001193125-26-092231","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1822479/000119312526092231/ownership.xml","form_type":"4"}},{"id":860463,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":21490,"kind":"person","name":"Petras Michael B. Jr.","position":1,"cik":"0001832387","reported_name":"Petras Michael B. 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The remaining SAUs under the award vest annually in equal installments in March 2027 and March 2028, subject to performance."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"These securities consist of performance-based share appreciation units (\"SAUs\") (formerly called performance stock units) that were granted on March 3, 2025, pursuant to the terms of a SAU Agreement under the 2020 Incentive Plan. Each SAU represented the Reporting Person's right to receive one share of Common Stock subject to stock price-related performance conditions. Regarding the SAUs, the Reporting Person vested in 89,686 shares of Common Stock on March 2, 2026. The remaining SAUs under the award vest annually in equal installments in March 2027 and March 2028, subject to performance."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"These securities consist of performance-based share appreciation units (\"SAUs\") (formerly called performance stock units) that were granted on March 3, 2025, pursuant to the terms of a SAU Agreement under the 2020 Incentive Plan. Each SAU represented the Reporting Person's right to receive one share of Common Stock subject to stock price-related performance conditions. Regarding the SAUs, the Reporting Person vested in 89,686 shares of Common Stock on March 2, 2026. The remaining SAUs under the award vest annually in equal installments in March 2027 and March 2028, subject to performance."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"These securities consist of performance-based share appreciation units (\"SAUs\") (formerly called performance stock units) that were granted on March 3, 2025, pursuant to the terms of a SAU Agreement under the 2020 Incentive Plan. Each SAU represented the Reporting Person's right to receive one share of Common Stock subject to stock price-related performance conditions. Regarding the SAUs, the Reporting Person vested in 89,686 shares of Common Stock on March 2, 2026. The remaining SAUs under the award vest annually in equal installments in March 2027 and March 2028, subject to performance."}],"balance_after":59790,"derivative":{"underlying":"Common Stock","underlying_shares":89686},"source":{"system":"sec-edgar","filing":"0001193125-26-092231","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1822479/000119312526092231/ownership.xml","form_type":"4"}},{"id":860462,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":21490,"kind":"person","name":"Petras Michael B. Jr.","position":1,"cik":"0001832387","reported_name":"Petras Michael B. 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The RSUs generally vest annually in 60%, 20%, and 20% installments, respectively, commencing March 2027."}],"balance_after":692427,"source":{"system":"sec-edgar","filing":"0001193125-26-092231","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1822479/000119312526092231/ownership.xml","form_type":"4"}},{"id":860461,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":21490,"kind":"person","name":"Petras Michael B. Jr.","position":1,"cik":"0001832387","reported_name":"Petras Michael B. 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Each RSU represents the Reporting Person's right to recieve one share of Common Stock, subject to vesting conditions."}],"balance_after":452179,"source":{"system":"sec-edgar","filing":"0001193125-26-092231","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1822479/000119312526092231/ownership.xml","form_type":"4"}},{"id":860460,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":21490,"kind":"person","name":"Petras Michael B. Jr.","position":1,"cik":"0001832387","reported_name":"Petras Michael B. 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Each SAU represents the Reporting Person's right to recieve one share of Common Stock, subject to performance."}],"balance_after":531283,"source":{"system":"sec-edgar","filing":"0001193125-26-092231","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1822479/000119312526092231/ownership.xml","form_type":"4"}},{"id":860459,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":21490,"kind":"person","name":"Petras Michael B. Jr.","position":1,"cik":"0001832387","reported_name":"Petras Michael B. 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The remaining SAUs under the award vest annually in equal installments in March 2027 and March 2028, subject to performance."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"These securities consist of performance-based share appreciation units (\"SAUs\") (formerly called performance stock units) that were granted on March 3, 2025, pursuant to the terms of a SAU Agreement under the 2020 Incentive Plan. Each SAU represented the Reporting Person's right to receive one share of Common Stock subject to stock price-related performance conditions. Regarding the SAUs, the Reporting Person vested in 89,686 shares of Common Stock on March 2, 2026. 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The remaining additional RSUs under the award vest annually in equal installments in March 2027 and March 2028, subject to performance."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"These securities consist 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 represented the Reporting Person's right to receive one share of Common Stock subject to stock price-related performance conditions. Regarding the additional RSUs, the Reporting Person vested in 14,573 shares of Common Stock on March 2, 2026. 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Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions. The RSUs generally vest annually in 60%, 20%, and 20% installments, respectively, commencing March 2027."}],"balance_after":484279,"source":{"system":"sec-edgar","filing":"0001193125-26-092194","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1599220/000119312526092194/ownership.xml","form_type":"4"}},{"id":860682,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":24489,"kind":"person","name":"Rutz Michael P","position":1,"cik":"0001599220","reported_name":"Rutz Michael P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President of Sterigenics"}}],"security":"Common Stock","published_at":"2026-03-05T01:51:09.000Z","date":"2026-03-02","kind":"tax_withholding","planned":false,"acquired":false,"shares":17497,"price":15.91,"value":278377.27,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F4","text":"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 43,720 RSUs granted to the Reporting Person on March 3, 2025. This award was granted pursuant to the terms of an RSU agreement under the 2020 Incentive Plan. Each RSU represents the Reporting Person's right to recieve one share of Common Stock, subject to vesting conditions or performance, as applicable."}],"balance_after":439056,"source":{"system":"sec-edgar","filing":"0001193125-26-092194","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1599220/000119312526092194/ownership.xml","form_type":"4"}},{"id":860681,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":24489,"kind":"person","name":"Rutz Michael P","position":1,"cik":"0001599220","reported_name":"Rutz Michael P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President of Sterigenics"}}],"security":"Common Stock","published_at":"2026-03-05T01:51:09.000Z","date":"2026-03-02","kind":"exercise","planned":false,"acquired":true,"shares":14573,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"A portion of the Reporting Person's March 3, 2025 additional performance-based RSUs vested on March 2, 2026 based upon the achievement of performance conditions. As a result, the Reporting Person received an additional 14,573 shares of Common Stock."},{"field":"shares","element":"transactionShares","label":"F6","text":"These securities consist 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 represented the Reporting Person's right to receive one share of Common Stock subject to stock price-related performance conditions. Regarding the additional RSUs, the Reporting Person vested in 14,573 shares of Common Stock on March 2, 2026. The remaining additional RSUs under the award vest annually in equal installments in March 2027 and March 2028, subject to performance."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"These securities consist 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 represented the Reporting Person's right to receive one share of Common Stock subject to stock price-related performance conditions. Regarding the additional RSUs, the Reporting Person vested in 14,573 shares of Common Stock on March 2, 2026. The remaining additional RSUs under the award vest annually in equal installments in March 2027 and March 2028, subject to performance."}],"balance_after":456553,"source":{"system":"sec-edgar","filing":"0001193125-26-092194","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1599220/000119312526092194/ownership.xml","form_type":"4"}},{"id":860680,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":24489,"kind":"person","name":"Rutz Michael P","position":1,"cik":"0001599220","reported_name":"Rutz Michael P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President of Sterigenics"}}],"security":"Common Stock","published_at":"2026-03-05T01:51:09.000Z","date":"2026-03-02","kind":"tax_withholding","planned":false,"acquired":false,"shares":4495,"price":15.91,"value":71515.45,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"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 11,423 RSUs  granted to the Reporting Person on March 4, 2024. This award was granted pursuant to the terms of an RSU agreement under the 2020 Incentive Plan. 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(\"Bull Holdco\") and (ii) 6,811,029 shares of Common Stock of the Issuer held by Bull Co-Invest L.P., a Delaware limited partnership (\"Bull Co-Invest\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Warburg Pincus XI, L.P., a Delaware limited partnership (\"WP XI GP\"), is the general partner of each of (i) Warburg Pincus Private Equity XI, L.P. (\"WP XI\"), (ii)Warburg Pincus Private Equity XI-B, L.P. (\"WP XI-B\"), (iii) WP XI Partners, L.P. (\"WP XI Partners\") and (iv) Warburg Pincus XI Partners, L.P. (\"Warburg Pincus XI Partners\"). WP Global LLC (\"WP Global\"), is the general partner of WP XI GP. 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 XI Cayman GP\"), is the general partner of Warburg Pincus Private Equity XI-C, L.P. (\"WP XI-C\" and, together with WP XI,WP XI-B, WP XI Partners and Warburg Pincus XI Partners, the \"WP XI Funds\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The WP XI Funds, Bull Co-Invest, Bull Holdco, WP Global, WPP II, WPP GP LLC, WP XI Cayman GP, WP XI-C LLC, WPP II Cayman, WP Bermuda GP, WP Bull Manager, WP LLC and WP are collectively referred to herein as the \"Warburg Pincus Entities.\""},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"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, Bull Co-Invest, Bull Holdco, WP Global, WPP II, WPP GP LLC, WP XI Cayman GP, WP XI-C LLC, WPP II Cayman, WP Bermuda GP, WP Bull Manager, WP LLC and WP 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Warburg Pincus XI-C, LLC (\"WP XI-C LLC\"), is the general partner of WP XI Cayman GP. Warburg Pincus Partners II (Cayman), L.P. (\"WPP II Cayman\"), is the managing member of WP XI-C LLC. Warburg Pincus (Bermuda) Private Equity GP Ltd. (\"WP Bermuda GP\"), 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 managing member of WP Bull Manager. Warburg Pincus LLC, a New York limited liability company (\"WP LLC\"), is the manager of the WP XI Funds. The WP XI Funds share limited partnership ownership in Bull Holdco on a pro rata basis in accordance with their respective numbers of Contributed Shares."}],"balance_after":34102952,"source":{"system":"sec-edgar","filing":"0001193125-25-310142","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/929408/000119312525310142/ownership.xml","form_type":"4"}},{"id":979625,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":15793,"kind":"person","name":"WARBURG PINCUS & CO.","position":1,"cik":"0000929408","reported_name":"WARBURG PINCUS & CO.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47040,"kind":"person","name":"Warburg Pincus Private Equity XI-C, L.P.","position":2,"cik":"0001550877","reported_name":"Warburg Pincus Private Equity XI-C, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47039,"kind":"person","name":"Warburg Pincus (Cayman) XI, L.P.","position":3,"cik":"0001554853","reported_name":"Warburg Pincus (Cayman) XI, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47041,"kind":"person","name":"Warburg Pincus XI-C, LLC","position":4,"cik":"0001554852","reported_name":"Warburg Pincus XI-C, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":40230,"kind":"person","name":"Warburg Pincus Partners II (Cayman), L.P.","position":5,"cik":"0001658820","reported_name":"Warburg Pincus Partners II (Cayman), L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":40231,"kind":"person","name":"Warburg Pincus (Bermuda) Private Equity GP Ltd.","position":6,"cik":"0001555729","reported_name":"Warburg Pincus (Bermuda) Private Equity GP Ltd.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":15794,"kind":"person","name":"WARBURG PINCUS LLC","position":7,"cik":"0001162870","reported_name":"WARBURG PINCUS LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":15792,"kind":"person","name":"Warburg Pincus Partners GP LLC","position":8,"cik":"0001621224","reported_name":"Warburg Pincus Partners GP LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock, $0.01 par value per share (\"Common Stock\")","published_at":"2025-12-06T01:43:16.000Z","date":"2025-12-03","kind":"sale","planned":false,"acquired":false,"shares":9720000,"price":16.33,"value":158727600.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On December 3, 2025, certain of the Warburg Pincus Entities (as defined below) sold a total of 9,720,000 shares of Common Stock of Sotera Health Company (the \"Issuer\") pursuant to Rule 144 under the Securities Act of 1933, as amended (the \"Sale\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Following the Sale, consists of (i) 27,291,923 shares of Common Stock of the Issuer held by Bull Holdco L.P. (\"Bull Holdco\") and (ii) 6,811,029 shares of Common Stock of the Issuer held by Bull Co-Invest L.P., a Delaware limited partnership (\"Bull Co-Invest\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Warburg Pincus XI, L.P., a Delaware limited partnership (\"WP XI GP\"), is the general partner of each of (i) Warburg Pincus Private Equity XI, L.P. (\"WP XI\"), (ii)Warburg Pincus Private Equity XI-B, L.P. (\"WP XI-B\"), (iii) WP XI Partners, L.P. (\"WP XI Partners\") and (iv) Warburg Pincus XI Partners, L.P. (\"Warburg Pincus XI Partners\"). WP Global LLC (\"WP Global\"), is the general partner of WP XI GP. 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 XI Cayman GP\"), is the general partner of Warburg Pincus Private Equity XI-C, L.P. (\"WP XI-C\" and, together with WP XI,WP XI-B, WP XI Partners and Warburg Pincus XI Partners, the \"WP XI Funds\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The WP XI Funds, Bull Co-Invest, Bull Holdco, WP Global, WPP II, WPP GP LLC, WP XI Cayman GP, WP XI-C LLC, WPP II Cayman, WP Bermuda GP, WP Bull Manager, WP LLC and WP are collectively referred to herein as the \"Warburg Pincus Entities.\""},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"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, Bull Co-Invest, Bull Holdco, WP Global, WPP II, WPP GP LLC, WP XI Cayman GP, WP XI-C LLC, WPP II Cayman, WP Bermuda GP, WP Bull Manager, WP LLC and WP 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Warburg Pincus XI-C, LLC (\"WP XI-C LLC\"), is the general partner of WP XI Cayman GP. Warburg Pincus Partners II (Cayman), L.P. (\"WPP II Cayman\"), is the managing member of WP XI-C LLC. Warburg Pincus (Bermuda) Private Equity GP Ltd. (\"WP Bermuda GP\"), 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 managing member of WP Bull Manager. Warburg Pincus LLC, a New York limited liability company (\"WP LLC\"), is the manager of the WP XI Funds. The WP XI Funds share limited partnership ownership in Bull Holdco on a pro rata basis in accordance with their respective numbers of Contributed Shares."}],"balance_after":34102952,"source":{"system":"sec-edgar","filing":"0001193125-25-310134","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/929408/000119312525310134/ownership.xml","form_type":"4"}},{"id":978712,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":46802,"kind":"person","name":"GTCR INVESTMENT XI LLC","position":1,"cik":"0001827977","reported_name":"GTCR INVESTMENT XI LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":46803,"kind":"person","name":"GTCR FUND XI/A LP","position":2,"cik":"0001591434","reported_name":"GTCR FUND XI/A LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":46804,"kind":"person","name":"GTCR FUND XI/C LP","position":3,"cik":"0001591436","reported_name":"GTCR FUND XI/C LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":46805,"kind":"person","name":"GTCR CO-INVEST XI LP","position":4,"cik":"0001591432","reported_name":"GTCR CO-INVEST XI LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":46806,"kind":"person","name":"GTCR PARTNERS XI/A&C LP","position":5,"cik":"0001828028","reported_name":"GTCR PARTNERS XI/A&C LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock, $0.01 par value per share (\"Common Stock\")","published_at":"2025-12-06T01:10:14.000Z","date":"2025-12-03","kind":"sale","planned":false,"acquired":false,"shares":6480000,"price":16.33,"value":105818400.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"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\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"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\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"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."}],"balance_after":22735301,"source":{"system":"sec-edgar","filing":"0001193125-25-310122","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1591434/000119312525310122/ownership.xml","form_type":"4"}},{"id":1001477,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":46802,"kind":"person","name":"GTCR INVESTMENT XI LLC","position":1,"cik":"0001827977","reported_name":"GTCR INVESTMENT XI LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":46803,"kind":"person","name":"GTCR FUND XI/A LP","position":2,"cik":"0001591434","reported_name":"GTCR FUND XI/A LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":46804,"kind":"person","name":"GTCR FUND XI/C LP","position":3,"cik":"0001591436","reported_name":"GTCR FUND XI/C LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":46805,"kind":"person","name":"GTCR CO-INVEST XI LP","position":4,"cik":"0001591432","reported_name":"GTCR CO-INVEST XI LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":46806,"kind":"person","name":"GTCR PARTNERS XI/A&C LP","position":5,"cik":"0001828028","reported_name":"GTCR PARTNERS XI/A&C LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock, $0.01 par value per share (\"Common Stock\")","published_at":"2025-11-12T22:06:21.000Z","date":"2025-11-10","kind":"sale","planned":false,"acquired":false,"shares":12000000,"price":15.651,"value":187812000.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"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\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"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\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"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."}],"balance_after":29215301,"source":{"system":"sec-edgar","filing":"0001193125-25-277915","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1591434/000119312525277915/ownership.xml","form_type":"4"}},{"id":1002854,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":15793,"kind":"person","name":"WARBURG PINCUS & CO.","position":1,"cik":"0000929408","reported_name":"WARBURG PINCUS & CO.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47040,"kind":"person","name":"Warburg Pincus Private Equity XI-C, L.P.","position":2,"cik":"0001550877","reported_name":"Warburg Pincus Private Equity XI-C, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47039,"kind":"person","name":"Warburg Pincus (Cayman) XI, L.P.","position":3,"cik":"0001554853","reported_name":"Warburg Pincus (Cayman) XI, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47041,"kind":"person","name":"Warburg Pincus XI-C, LLC","position":4,"cik":"0001554852","reported_name":"Warburg Pincus XI-C, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":40230,"kind":"person","name":"Warburg Pincus Partners II (Cayman), L.P.","position":5,"cik":"0001658820","reported_name":"Warburg Pincus Partners II (Cayman), L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":40231,"kind":"person","name":"Warburg Pincus (Bermuda) Private Equity GP Ltd.","position":6,"cik":"0001555729","reported_name":"Warburg Pincus (Bermuda) Private Equity GP Ltd.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":15794,"kind":"person","name":"WARBURG PINCUS LLC","position":7,"cik":"0001162870","reported_name":"WARBURG PINCUS LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":15792,"kind":"person","name":"Warburg Pincus Partners GP LLC","position":8,"cik":"0001621224","reported_name":"Warburg Pincus Partners GP LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock, $0.01 par value per share (\"Common Stock\")","published_at":"2025-11-12T21:18:05.000Z","date":"2025-11-10","kind":"sale","planned":false,"acquired":false,"shares":18000000,"price":15.651,"value":281718000.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On November 10, 2025, certain of the Warburg Pincus Entities (as defined below) sold a total of 18,000,000 shares of Common Stock of Sotera Health Company (the \"Issuer\") in an underwritten public secondary offering (the \"Offering\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Following the Offering, consists of (i) 14,405,046 shares of Common Stock of the Issuer held by Bull Holdco L.P. (\"Bull Holdco\") and (ii) 3,594,954 shares of Common Stock of the Issuer held by Bull Co-Invest L.P., a Delaware limited partnership (\"Bull Co-Invest\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Warburg Pincus XI, L.P., a Delaware limited partnership (\"WP XI GP\"), is the general partner of each of (i) Warburg Pincus Private Equity XI, L.P. (\"WP XI\"), (ii)Warburg Pincus Private Equity XI-B, L.P. (\"WP XI-B\"), (iii) WP XI Partners, L.P. (\"WP XI Partners\") and (iv) Warburg Pincus XI Partners, L.P. (\"Warburg Pincus XI Partners\"). WP Global LLC (\"WP Global\"), is the general partner of WP XI GP. 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 XI Cayman GP\"), is the general partner of Warburg Pincus Private Equity XI-C, L.P. (\"WP XI-C\" and, together with WP XI,WP XI-B, WP XI Partners and Warburg Pincus XI Partners, the \"WP XI Funds\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The WP XI Funds, Bull Co-Invest, Bull Holdco, WP Global, WPP II, WPP GP LLC, WP XI Cayman GP, WP XI-C LLC, WPP II Cayman, WP Bermuda GP, WP Bull Manager, WP LLC and WP are collectively referred to herein as the \"Warburg Pincus Entities.\""},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"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, Bull Co-Invest, Bull Holdco, WP Global, WPP II, WPP GP LLC, WP XI Cayman GP, WP XI-C LLC, WPP II Cayman, WP Bermuda GP, WP Bull Manager, WP LLC and WP 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Warburg Pincus XI-C, LLC (\"WP XI-C LLC\"), is the general partner of WP XI Cayman GP. Warburg Pincus Partners II (Cayman), L.P. (\"WPP II Cayman\"), is the managing member of WP XI-C LLC. Warburg Pincus (Bermuda) Private Equity GP Ltd. (\"WP Bermuda GP\"), 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 managing member of WP Bull Manager. Warburg Pincus LLC, a New York limited liability company (\"WP LLC\"), is the manager of the WP XI Funds. The WP XI Funds share limited partnership ownership in Bull Holdco on a pro rata basis in accordance with their respective numbers of Contributed Shares."}],"balance_after":43822952,"source":{"system":"sec-edgar","filing":"0001999371-25-017529","document":"warburg_ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/929408/000199937125017529/warburg_ownership.xml","form_type":"4"}},{"id":1003074,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":15793,"kind":"person","name":"WARBURG PINCUS & CO.","position":1,"cik":"0000929408","reported_name":"WARBURG PINCUS & CO.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47102,"kind":"person","name":"Warburg Pincus Private Equity XI, L.P.","position":2,"cik":"0001540163","reported_name":"Warburg Pincus Private Equity XI, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47109,"kind":"person","name":"WP XI Partners, L.P.","position":3,"cik":"0001540164","reported_name":"WP XI Partners, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47106,"kind":"person","name":"Warburg Pincus XI Partners, L.P.","position":4,"cik":"0001540386","reported_name":"Warburg Pincus XI Partners, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47105,"kind":"person","name":"Warburg Pincus Private Equity XI-B, L.P.","position":5,"cik":"0001540166","reported_name":"Warburg Pincus Private Equity XI-B, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47101,"kind":"person","name":"Bull Co-Invest L.P.","position":6,"cik":"0001832693","reported_name":"Bull Co-Invest L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47103,"kind":"person","name":"Bull Holdco L.P.","position":7,"cik":"0002014247","reported_name":"Bull Holdco L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47107,"kind":"person","name":"Warburg Pincus XI, L.P.","position":8,"cik":"0001540167","reported_name":"Warburg Pincus XI, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47108,"kind":"person","name":"WP Global LLC","position":9,"cik":"0001540385","reported_name":"WP Global LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47104,"kind":"person","name":"Warburg Pincus Partners II, L.P.","position":10,"cik":"0001658787","reported_name":"Warburg Pincus Partners II, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock, $0.01 par value per share (\"Common Stock\")","published_at":"2025-11-12T21:11:56.000Z","date":"2025-11-10","kind":"sale","planned":false,"acquired":false,"shares":18000000,"price":15.651,"value":281718000.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On November 10, 2025, certain of the Warburg Pincus Entities (as defined below) sold a total of 18,000,000 shares of Common Stock of Sotera Health Company (the \"Issuer\") in an underwritten public secondary offering (the \"Offering\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Following the Offering, consists of (i) 14,405,046 shares of Common Stock of the Issuer held by Bull Holdco L.P. (\"Bull Holdco\") and (ii) 3,594,954 shares of Common Stock of the Issuer held by Bull Co-Invest L.P., a Delaware limited partnership (\"Bull Co-Invest\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Warburg Pincus XI, L.P., a Delaware limited partnership (\"WP XI GP\"), is the general partner of each of (i) Warburg Pincus Private Equity XI, L.P. (\"WP XI\"), (ii)Warburg Pincus Private Equity XI-B, L.P. (\"WP XI-B\"), (iii) WP XI Partners, L.P. (\"WP XI Partners\") and (iv) Warburg Pincus XI Partners, L.P. (\"Warburg Pincus XI Partners\"). WP Global LLC (\"WP Global\"), is the general partner of WP XI GP. 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 XI Cayman GP\"), is the general partner of Warburg Pincus Private Equity XI-C, L.P. (\"WP XI-C\" and, together with WP XI,WP XI-B, WP XI Partners and Warburg Pincus XI Partners, the \"WP XI Funds\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The WP XI Funds, Bull Co-Invest, Bull Holdco, WP Global, WPP II, WPP GP LLC, WP XI Cayman GP, WP XI-C LLC, WPP II Cayman, WP Bermuda GP, WP Bull Manager, WP LLC and WP are collectively referred to herein as the \"Warburg Pincus Entities.\""},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"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, Bull Co-Invest, Bull Holdco, WP Global, WPP II, WPP GP LLC, WP XI Cayman GP, WP XI-C LLC, WPP II Cayman, WP Bermuda GP, WP Bull Manager, WP LLC and WP 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Warburg Pincus XI-C, LLC (\"WP XI-C LLC\"), is the general partner of WP XI Cayman GP. Warburg Pincus Partners II (Cayman), L.P. (\"WPP II Cayman\"), is the managing member of WP XI-C LLC. Warburg Pincus (Bermuda) Private Equity GP Ltd. (\"WP Bermuda GP\"), 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 managing member of WP Bull Manager. Warburg Pincus LLC, a New York limited liability company (\"WP LLC\"), is the manager of the WP XI Funds. The WP XI Funds share limited partnership ownership in Bull Holdco on a pro rata basis in accordance with their respective numbers of Contributed Shares."}],"balance_after":43822952,"source":{"system":"sec-edgar","filing":"0001999371-25-017526","document":"warburg_ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1832693/000199937125017526/warburg_ownership.xml","form_type":"4"}},{"id":1045243,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":15793,"kind":"person","name":"WARBURG PINCUS & CO.","position":1,"cik":"0000929408","reported_name":"WARBURG PINCUS & CO.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47040,"kind":"person","name":"Warburg Pincus Private Equity XI-C, L.P.","position":2,"cik":"0001550877","reported_name":"Warburg Pincus Private Equity XI-C, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47039,"kind":"person","name":"Warburg Pincus (Cayman) XI, L.P.","position":3,"cik":"0001554853","reported_name":"Warburg Pincus (Cayman) XI, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47041,"kind":"person","name":"Warburg Pincus XI-C, LLC","position":4,"cik":"0001554852","reported_name":"Warburg Pincus XI-C, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":40230,"kind":"person","name":"Warburg Pincus Partners II (Cayman), L.P.","position":5,"cik":"0001658820","reported_name":"Warburg Pincus Partners II (Cayman), L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":40231,"kind":"person","name":"Warburg Pincus (Bermuda) Private Equity GP Ltd.","position":6,"cik":"0001555729","reported_name":"Warburg Pincus (Bermuda) Private Equity GP Ltd.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":15794,"kind":"person","name":"WARBURG PINCUS LLC","position":7,"cik":"0001162870","reported_name":"WARBURG PINCUS LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":15792,"kind":"person","name":"Warburg Pincus Partners GP LLC","position":8,"cik":"0001621224","reported_name":"Warburg Pincus Partners GP LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock, $0.01 par value per share (\"Common Stock\")","published_at":"2025-09-10T01:41:32.000Z","date":"2025-09-05","kind":"sale","planned":false,"acquired":false,"shares":12000000,"price":15.111,"value":181332000.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On September 5, 2025, certain of the Warburg Pincus Entities (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\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Following the Offering, consists of (i) 49,475,694 shares of Common Stock of the Issuer held by Bull Holdco L.P. (\"Bull Holdco\") and (iii) 12,347,258 shares of Common Stock of the Issuer held by Bull Co-Invest L.P., a Delaware limited partnership (\"Bull Co-Invest\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Warburg Pincus XI, L.P., a Delaware limited partnership (\"WP XI GP\"), is the general partner of each of (i) Warburg Pincus Private Equity XI, L.P. (\"WP XI\"), (ii)Warburg Pincus Private Equity XI-B, L.P. (\"WP XI-B\"), (iii) WP XI Partners, L.P. (\"WP XI Partners\") and (iv) Warburg Pincus XI Partners, L.P. (\"Warburg Pincus XI Partners\"). WP Global LLC (\"WP Global\"), is the general partner of WP XI GP. 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 XI Cayman GP\"), is the general partner of Warburg Pincus Private Equity XI-C, L.P. (\"WP XI-C\" and, together with WP XI,WP XI-B, WP XI Partners and Warburg Pincus XI Partners, the \"WP XI Funds\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The WP XI Funds, Bull Co-Invest, Bull Holdco, WP Global, WPP II, WPP GP LLC, WP XI Cayman GP, WP XI-C LLC, WPP II Cayman, WP Bermuda GP, WP Bull Manager, WP LLC and WP are collectively referred to herein as the \"Warburg Pincus Entities.\""},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"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, Bull Co-Invest, Bull Holdco, WP Global, WPP II, WPP GP LLC, WP XI Cayman GP, WP XI-C LLC, WPP II Cayman, WP Bermuda GP, WP Bull Manager, WP LLC and WP 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Warburg Pincus XI-C, LLC (\"WP XI-C LLC\"), is the general partner of WP XI Cayman GP. Warburg Pincus Partners II (Cayman), L.P. (\"WPP II Cayman\"), is the managing member of WP XI-C LLC. Warburg Pincus (Bermuda) Private Equity GP Ltd. (\"WP Bermuda GP\"), 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 managing member of WP Bull Manager. Warburg Pincus LLC, a New York limited liability company (\"WP LLC\"), is the manager of the WP XI Funds. The WP XI Funds share limited partnership ownership in Bull Holdco on a pro rata basis in accordance with their respective numbers of Contributed Shares."}],"balance_after":61822952,"source":{"system":"sec-edgar","filing":"0001999371-25-012976","document":"warburg_ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/929408/000199937125012976/warburg_ownership.xml","form_type":"4"}},{"id":1045345,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":15793,"kind":"person","name":"WARBURG PINCUS & CO.","position":1,"cik":"0000929408","reported_name":"WARBURG PINCUS & CO.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47102,"kind":"person","name":"Warburg Pincus Private Equity XI, L.P.","position":2,"cik":"0001540163","reported_name":"Warburg Pincus Private Equity XI, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47109,"kind":"person","name":"WP XI Partners, L.P.","position":3,"cik":"0001540164","reported_name":"WP XI Partners, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47106,"kind":"person","name":"Warburg Pincus XI Partners, L.P.","position":4,"cik":"0001540386","reported_name":"Warburg Pincus XI Partners, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47105,"kind":"person","name":"Warburg Pincus Private Equity XI-B, L.P.","position":5,"cik":"0001540166","reported_name":"Warburg Pincus Private Equity XI-B, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47101,"kind":"person","name":"Bull Co-Invest L.P.","position":6,"cik":"0001832693","reported_name":"Bull Co-Invest L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47103,"kind":"person","name":"Bull Holdco L.P.","position":7,"cik":"0002014247","reported_name":"Bull Holdco L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47107,"kind":"person","name":"Warburg Pincus XI, L.P.","position":8,"cik":"0001540167","reported_name":"Warburg Pincus XI, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47108,"kind":"person","name":"WP Global LLC","position":9,"cik":"0001540385","reported_name":"WP Global LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47104,"kind":"person","name":"Warburg Pincus Partners II, L.P.","position":10,"cik":"0001658787","reported_name":"Warburg Pincus Partners II, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock, $0.01 par value per share (\"Common Stock\")","published_at":"2025-09-10T01:37:53.000Z","date":"2025-09-05","kind":"sale","planned":false,"acquired":false,"shares":12000000,"price":15.111,"value":181332000.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On September 5, 2025, certain of the Warburg Pincus Entities (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\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Following the Offering, consists of (i) 49,475,694 shares of Common Stock of the Issuer held by Bull Holdco L.P. (\"Bull Holdco\") and (ii) 12,347,258 shares of Common Stock of the Issuer held by Bull Co-Invest L.P., a Delaware limited partnership (\"Bull Co-Invest\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Warburg Pincus XI, L.P., a Delaware limited partnership (\"WP XI GP\"), is the general partner of each of (i) Warburg Pincus Private Equity XI, L.P. (\"WP XI\"), (ii) Warburg Pincus Private Equity XI-B, L.P. (\"WP XI-B\"), (iii) WP XI Partners, L.P. (\"WP XI Partners\") and (iv) Warburg Pincus XI Partners, L.P. (\"Warburg Pincus XI Partners\"). WP Global LLC (\"WP Global\"), is the general partner of WP XI GP. 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 XI Cayman GP\"), is the general partner of Warburg Pincus Private Equity XI-C, L.P. (\"WP XI-C\" and, together with WP XI, WP XI-B, WP XI Partners and Warburg Pincus XI Partners, the \"WP XI Funds\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The WP XI Funds, Bull Co-Invest, Bull Holdco, WP Global, WPP II, WPP GP LLC, WP XI Cayman GP, WP XI-C LLC, WPP II Cayman, WP Bermuda GP, WP Bull Manager, WP LLC and WP are collectively referred to herein as the \"Warburg Pincus Entities.\""},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"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, Bull Co-Invest, Bull Holdco, WP Global, WPP II, WPP GP LLC, WP XI Cayman GP, WP XI-C LLC, WPP II Cayman, WP Bermuda GP, WP Bull Manager, WP LLC and WP 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Warburg Pincus XI-C, LLC (\"WP XI-C LLC\"), is the general partner of WP XI Cayman GP. Warburg Pincus Partners II (Cayman), L.P. (\"WPP II Cayman\"), is the managing member of WP XI-C LLC. Warburg Pincus (Bermuda) Private Equity GP Ltd. (\"WP Bermuda GP\"), 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 managing member of WP Bull Manager. Warburg Pincus LLC, a New York limited liability company (\"WP LLC\"), is the manager of the WP XI Funds. The WP XI Funds share limited partnership ownership in Bull Holdco on a pro rata basis in accordance with their respective numbers of Contributed Shares."}],"balance_after":61822952,"source":{"system":"sec-edgar","filing":"0001999371-25-012975","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1832693/000199937125012975/ownership.xml","form_type":"4"}},{"id":1044583,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":46802,"kind":"person","name":"GTCR INVESTMENT XI LLC","position":1,"cik":"0001827977","reported_name":"GTCR INVESTMENT XI LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":46803,"kind":"person","name":"GTCR FUND XI/A LP","position":2,"cik":"0001591434","reported_name":"GTCR FUND XI/A LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":46804,"kind":"person","name":"GTCR FUND XI/C LP","position":3,"cik":"0001591436","reported_name":"GTCR FUND XI/C LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":46805,"kind":"person","name":"GTCR CO-INVEST XI LP","position":4,"cik":"0001591432","reported_name":"GTCR CO-INVEST XI LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":46806,"kind":"person","name":"GTCR PARTNERS XI/A&C LP","position":5,"cik":"0001828028","reported_name":"GTCR PARTNERS XI/A&C LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock, $0.01 par value per share (\"Common Stock\")","published_at":"2025-09-10T00:41:57.000Z","date":"2025-09-05","kind":"sale","planned":false,"acquired":false,"shares":8000000,"price":15.111,"value":120888000.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"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\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"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\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"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."}],"balance_after":41215301,"source":{"system":"sec-edgar","filing":"0001193125-25-199493","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1591434/000119312525199493/ownership.xml","form_type":"4"}},{"id":1055359,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":24489,"kind":"person","name":"Rutz Michael P","position":1,"cik":"0001599220","reported_name":"Rutz Michael P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President of Sterigenics"}}],"security":"Common Stock","published_at":"2025-08-26T22:08:01.000Z","date":"2025-08-22","kind":"sale","planned":false,"acquired":false,"shares":126611,"price":16.3833,"value":2074305.9963,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Price reported constitutes the average weighted price of shares sold.  Shares were sold at varying prices in the range of $16.30 - $16.54.  The reporting person hereby undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"These securities consist of 80,901 RSUs and 369,303 shares of Common Stock."}],"balance_after":450204,"source":{"system":"sec-edgar","filing":"0001599220-25-000003","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1599220/000159922025000003/ownership.xml","form_type":"4"}},{"id":1072447,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":25496,"kind":"person","name":"Lyons Jonathan M.","position":1,"cik":"0001983511","reported_name":"Lyons Jonathan M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Sr. Vice President, CFO"}}],"security":"Common Stock, $0.01 par value per share (\"Common Stock\")","published_at":"2025-08-07T22:09:02.000Z","date":"2025-08-05","kind":"tax_withholding","planned":false,"acquired":false,"shares":11508,"price":11.19,"value":128774.52,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"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 25,655 Restricted Stock Units (\"RSUs\"), which represents 33% of the RSU award granted to the Reporting Person on August 7, 2023. These awards were granted pursuant to the terms of RSU agreements 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."}],"balance_after":189602,"source":{"system":"sec-edgar","filing":"0000950170-25-105286","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1983511/000095017025105286/ownership.xml","form_type":"4"}},{"id":1132959,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":35170,"kind":"person","name":"Flynn Karen","position":1,"cik":"0001553599","reported_name":"Flynn Karen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock, $0.01 par value per share (\"Common Stock\")","published_at":"2025-05-27T20:49:27.000Z","date":"2025-05-22","kind":"grant","planned":false,"acquired":true,"shares":19132,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These securities consist of 19,132 restricted stock units (\"RSUs\") that were granted on May 22, 2025, 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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"These securities consist of 19,132 RSUs and 20,089 shares of Common Stock."}],"balance_after":39221,"source":{"system":"sec-edgar","filing":"0000950170-25-077814","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1553599/000095017025077814/ownership.xml","form_type":"4"}},{"id":1132858,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":79204,"kind":"person","name":"Knauss Robert Brown","position":1,"cik":"0001951938","reported_name":"Knauss Robert Brown","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock, $0.01 par value per share (\"Common Stock\")","published_at":"2025-05-27T20:48:11.000Z","date":"2025-05-22","kind":"grant","planned":false,"acquired":true,"shares":19132,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These securities consist of 19,132 restricted stock units (\"RSUs\") that were granted on May 22, 2025, 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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"These securities consist of 19,132 RSUs and 35,801 shares of Common Stock."}],"balance_after":54933,"source":{"system":"sec-edgar","filing":"0000950170-25-077811","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1822479/000095017025077811/ownership.xml","form_type":"4"}},{"id":1132865,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":29981,"kind":"person","name":"Wheadon David E.","position":1,"cik":"0001789507","reported_name":"Wheadon David E.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock, $0.01 par value per share (\"Common Stock\")","published_at":"2025-05-27T20:46:51.000Z","date":"2025-05-22","kind":"grant","planned":false,"acquired":true,"shares":19132,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These securities consist of 19,132 restricted stock units (\"RSUs\") that were granted on May 22, 2025, 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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"These securities consist of 19,132 RSUs and 55,780 shares of Common Stock."}],"balance_after":74912,"source":{"system":"sec-edgar","filing":"0000950170-25-077809","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1789507/000095017025077809/ownership.xml","form_type":"4"}},{"id":1133153,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":43776,"kind":"person","name":"PETRELLA VINCENT K","position":1,"cik":"0001276410","reported_name":"PETRELLA VINCENT K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock, $0.01 par value per share (\"Common Stock\")","published_at":"2025-05-27T20:45:31.000Z","date":"2025-05-22","kind":"grant","planned":false,"acquired":true,"shares":19132,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These securities consist of 19,132 restricted stock units (\"RSUs\") that were granted on May 22, 2025, 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. 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The recipient of the gifted securities has executed a lock-up agreement equivalent to the lock-up agreement entered into with respect to the September 6, 2024 registered stock offering."}],"balance_after":5253580,"source":{"system":"sec-edgar","filing":"0000950170-24-105933","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1822479/000095017024105933/ownership.xml","form_type":"4"}},{"id":1412148,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":15793,"kind":"person","name":"WARBURG PINCUS & CO.","position":1,"cik":"0000929408","reported_name":"WARBURG PINCUS & CO.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47040,"kind":"person","name":"Warburg Pincus Private Equity XI-C, L.P.","position":2,"cik":"0001550877","reported_name":"Warburg Pincus Private Equity XI-C, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47039,"kind":"person","name":"Warburg Pincus (Cayman) XI, L.P.","position":3,"cik":"0001554853","reported_name":"Warburg Pincus (Cayman) XI, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47041,"kind":"person","name":"Warburg Pincus XI-C, LLC","position":4,"cik":"0001554852","reported_name":"Warburg Pincus XI-C, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":40230,"kind":"person","name":"Warburg Pincus Partners II (Cayman), L.P.","position":5,"cik":"0001658820","reported_name":"Warburg Pincus Partners II (Cayman), L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":40231,"kind":"person","name":"Warburg Pincus (Bermuda) Private Equity GP Ltd.","position":6,"cik":"0001555729","reported_name":"Warburg Pincus (Bermuda) Private Equity GP Ltd.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":15794,"kind":"person","name":"WARBURG PINCUS LLC","position":7,"cik":"0001162870","reported_name":"WARBURG PINCUS LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":15792,"kind":"person","name":"Warburg Pincus Partners GP LLC","position":8,"cik":"0001621224","reported_name":"Warburg Pincus Partners GP LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock, $0.01 par value per share (\"Common Stock\")","published_at":"2024-09-09T23:13:41.000Z","date":"2024-09-06","kind":"sale","planned":false,"acquired":false,"shares":15000000,"price":15.03,"value":225450000.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On September 6, 2024, certain of the Warburg Pincus Entities (as defined below) sold a total of 15,000,000 shares of Common Stock of Sotera Health Company (the \"Issuer\") in an underwritten public secondary offering (the \"Offering\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Following the Offering, consists of (i) 59,079,058 shares of Common Stock of the Issuer held by Bull Holdco L.P. (\"Bull Holdco\") and (iii) 14,743,894 shares of Common Stock of the Issuer held by Bull Co-Invest L.P., a Delaware limited partnership (\"Bull Co-Invest\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Warburg Pincus XI, L.P., a Delaware limited partnership (\"WP XI GP\"), is the general partner of each of (i) Warburg Pincus Private Equity XI, L.P. (\"WP XI\"), (ii)Warburg Pincus Private Equity XI-B, L.P. (\"WP XI-B\"), (iii) WP XI Partners, L.P. (\"WP XI Partners\") and (iv) Warburg Pincus XI Partners, L.P. (\"Warburg Pincus XI Partners\"). WP Global LLC (\"WP Global\"), is the general partner of WP XI GP. 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 XI Cayman GP\"), is the general partner of Warburg Pincus Private Equity XI-C, L.P. (\"WP XI-C\" and, together with WP XI,WP XI-B, WP XI Partners and Warburg Pincus XI Partners, the \"WP XI Funds\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The WP XI Funds, Bull Co-Invest, Bull Holdco, WP Global, WPP II, WPP GP LLC, WP XI Cayman GP, WP XI-C LLC, WPP II Cayman, WP Bermuda GP, WP Bull Manager, WP LLC and WP are collectively referred to herein as the \"Warburg Pincus Entities.\""},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"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, Bull Co-Invest, Bull Holdco, WP Global, WPP II, WPP GP LLC, WP XI Cayman GP, WP XI-C LLC, WPP II Cayman, WP Bermuda GP, WP Bull Manager, WP LLC and WP 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Warburg Pincus XI-C, LLC (\"WP XI-C LLC\"), is the general partner of WP XI Cayman GP. Warburg Pincus Partners II (Cayman), L.P. (\"WPP II Cayman\"), is the managing member of WP XI-C LLC. Warburg Pincus (Bermuda) Private Equity GP Ltd. (\"WP Bermuda GP\"), 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 managing member of WP Bull Manager. Warburg Pincus LLC, a New York limited liability company (\"WP LLC\"), is the manager of the WP XI Funds. The WP XI Funds share limited partnership ownership in Bull Holdco on a pro rata basis in accordance with their respective numbers of Contributed Shares."}],"balance_after":73822952,"source":{"system":"sec-edgar","filing":"0001999371-24-011716","document":"warburg_ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/929408/000199937124011716/warburg_ownership.xml","form_type":"4"}},{"id":1412242,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":15793,"kind":"person","name":"WARBURG PINCUS & CO.","position":1,"cik":"0000929408","reported_name":"WARBURG PINCUS & CO.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47102,"kind":"person","name":"Warburg Pincus Private Equity XI, L.P.","position":2,"cik":"0001540163","reported_name":"Warburg Pincus Private Equity XI, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47109,"kind":"person","name":"WP XI Partners, L.P.","position":3,"cik":"0001540164","reported_name":"WP XI Partners, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47106,"kind":"person","name":"Warburg Pincus XI Partners, L.P.","position":4,"cik":"0001540386","reported_name":"Warburg Pincus XI Partners, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47105,"kind":"person","name":"Warburg Pincus Private Equity XI-B, L.P.","position":5,"cik":"0001540166","reported_name":"Warburg Pincus Private Equity XI-B, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47101,"kind":"person","name":"Bull Co-Invest L.P.","position":6,"cik":"0001832693","reported_name":"Bull Co-Invest L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47103,"kind":"person","name":"Bull Holdco L.P.","position":7,"cik":"0002014247","reported_name":"Bull Holdco L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47107,"kind":"person","name":"Warburg Pincus XI, L.P.","position":8,"cik":"0001540167","reported_name":"Warburg Pincus XI, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47108,"kind":"person","name":"WP Global LLC","position":9,"cik":"0001540385","reported_name":"WP Global LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":47104,"kind":"person","name":"Warburg Pincus Partners II, L.P.","position":10,"cik":"0001658787","reported_name":"Warburg Pincus Partners II, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock, $0.01 par value per share (\"Common Stock\")","published_at":"2024-09-09T23:13:13.000Z","date":"2024-09-06","kind":"sale","planned":false,"acquired":false,"shares":15000000,"price":15.03,"value":225450000.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On September 6, 2024, certain of the Warburg Pincus Entities (as defined below) sold a total of 15,000,000 shares of Common Stock of Sotera Health Company (the \"Issuer\") in an underwritten public secondary offering (the \"Offering\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Following the Offering, consists of (i) 59,079,058 shares of Common Stock of the Issuer held by Bull Holdco L.P. (\"Bull Holdco\") and (iii) 14,743,894 shares of Common Stock of the Issuer held by Bull Co-Invest L.P., a Delaware limited partnership (\"Bull Co-Invest\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Warburg Pincus XI, L.P., a Delaware limited partnership (\"WP XI GP\"), is the general partner of each of (i) Warburg Pincus Private Equity XI, L.P. (\"WP XI\"), (ii) Warburg Pincus Private Equity XI-B, L.P. (\"WP XI-B\"), (iii) WP XI Partners, L.P. (\"WP XI Partners\") and (iv) Warburg Pincus XI Partners, L.P. (\"Warburg Pincus XI Partners\"). WP Global LLC (\"WP Global\"), is the general partner of WP XI GP. 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 XI Cayman GP\"), is the general partner of Warburg Pincus Private Equity XI-C, L.P. (\"WP XI-C\" and, together with WP XI, WP XI-B, WP XI Partners and Warburg Pincus XI Partners, the \"WP XI Funds\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The WP XI Funds, Bull Co-Invest, Bull Holdco, WP Global, WPP II, WPP GP LLC, WP XI Cayman GP, WP XI-C LLC, WPP II Cayman, WP Bermuda GP, WP Bull Manager, WP LLC and WP are collectively referred to herein as the \"Warburg Pincus Entities.\""},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"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, Bull Co-Invest, Bull Holdco, WP Global, WPP II, WPP GP LLC, WP XI Cayman GP, WP XI-C LLC, WPP II Cayman, WP Bermuda GP, WP Bull Manager, WP LLC and WP 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Warburg Pincus XI-C, LLC (\"WP XI-C LLC\"), is the general partner of WP XI Cayman GP. Warburg Pincus Partners II (Cayman), L.P. (\"WPP II Cayman\"), is the managing member of WP XI-C LLC. Warburg Pincus (Bermuda) Private Equity GP Ltd. (\"WP Bermuda GP\"), 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 managing member of WP Bull Manager. Warburg Pincus LLC, a New York limited liability company (\"WP LLC\"), is the manager of the WP XI Funds. The WP XI Funds share limited partnership ownership in Bull Holdco on a pro rata basis in accordance with their respective numbers of Contributed Shares."}],"balance_after":73822952,"source":{"system":"sec-edgar","filing":"0001999371-24-011715","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1832693/000199937124011715/ownership.xml","form_type":"4"}},{"id":1411635,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":46802,"kind":"person","name":"GTCR INVESTMENT XI LLC","position":1,"cik":"0001827977","reported_name":"GTCR INVESTMENT XI LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":46803,"kind":"person","name":"GTCR FUND XI/A LP","position":2,"cik":"0001591434","reported_name":"GTCR FUND XI/A LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":46805,"kind":"person","name":"GTCR CO-INVEST XI LP","position":3,"cik":"0001591432","reported_name":"GTCR CO-INVEST XI LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":46804,"kind":"person","name":"GTCR FUND XI/C LP","position":4,"cik":"0001591436","reported_name":"GTCR FUND XI/C LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":46806,"kind":"person","name":"GTCR PARTNERS XI/A&C LP","position":5,"cik":"0001828028","reported_name":"GTCR PARTNERS XI/A&C LP","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock, $0.01 par value per share (\"Common Stock\")","published_at":"2024-09-09T21:36:42.000Z","date":"2024-09-06","kind":"sale","planned":false,"acquired":false,"shares":10000000,"price":15.03,"value":150300000.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"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\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"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\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"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."}],"balance_after":49215301,"source":{"system":"sec-edgar","filing":"0001999371-24-011707","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1591434/000199937124011707/ownership.xml","form_type":"4"}},{"id":1438931,"issuer":{"id":3869,"kind":"organization","name":"Sotera Health Co"},"owners":[{"id":25496,"kind":"person","name":"Lyons Jonathan M.","position":1,"cik":"0001983511","reported_name":"Lyons Jonathan M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Sr. Vice President, CFO"}}],"security":"Common Stock, $0.01 par value per share (\"Common Stock\")","published_at":"2024-08-07T20:20:10.000Z","date":"2024-08-05","kind":"tax_withholding","planned":false,"acquired":false,"shares":7659,"price":14.22,"value":108910.98,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"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 25,655 Restricted Stock Units (\"RSUs\"), which represents 33% of the RSU awards granted to the Reporting Person on August 7, 2023. These awards were granted pursuant to the terms of RSU agreements 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."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Represents the closing price of the Common Stock on August 5, 2024."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"These securities consist of 92,436 RSUs and 17,996 shares of Common Stock."}],"balance_after":110432,"source":{"system":"sec-edgar","filing":"0000950170-24-092827","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1983511/000095017024092827/ownership.xml","form_type":"4"}}],"next_cursor":"2024-08-07T20:20:10.000000Z,1438931"}