SHC

shc-202602180001822479FALSE00018224792026-02-182026-02-18

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): February 18, 2026

SOTERA HEALTH COMPANY

(Exact Name of Registrant as Specified in Charter)

Delaware001-3972947-3531161 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.)

9100 South Hills Blvd, Suite 300 Broadview Heights, Ohio 44147 (Address of Principal Executive Offices) (Zip Code) (440) 262-1410 (Registrant’s telephone number, including area code) Not Applicable (Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of Each ClassTrading Symbol Name of Exchange on which registered

Common stock, $0.01 par value per shareSHCThe Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR 230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR 240.12b-2). Emerging growth company   ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

Item 2.02. Results of Operations and Financial Condition. On February 24, 2026, Sotera Health Company (the “Company”) issued a press release (the “Press Release”) announcing its financial results for the quarter and year ended December 31, 2025. The Company will hold its previously announced conference call on February 24, 2026, at 9:00 a.m. Eastern Time to discuss its financial results and full-year 2026 outlook. A copy of the Press Release is attached to this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference. The information in this Item 2.02, including Exhibit 99.1, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liability under that section, and shall not be deemed to be incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, unless expressly incorporated by specific reference in such filing.

Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. On February 18, 2026, Alex Dimitrief, Senior Vice President and General Counsel of the Company, provided notice to the Company that he will retire on March 31, 2026. Beginning on April 1, 2026, Mr. Dimitrief is expected to be retained by the Company as an advisor to assist the Company with ethylene oxide litigation matters. Erika Ostrowski, who has served as the Company’s Vice President, Deputy General Counsel and Corporate Secretary for the last two years under Mr. Dimitrief’s leadership, will be promoted to Senior Vice President and General Counsel effective April 1, 2026. Mr. Dimitrief is expected to enter into an advisory agreement with the Company to memorialize the terms of his advisor service to the Company (the “Advisory Agreement”). Under the Advisory Agreement, it is expected that Mr. Dimitrief will provide advisory services for a term of up to 12 months, and will receive advisory fees equal to $22,500 per month, plus reasonable expense reimbursement.

Item 9.01. Financial Statements and Exhibits. (d) Exhibits Exhibit NumberDescription 99.1Press Release, dated February 24, 2026

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Sotera Health Company (Registrant)

Date: February 24, 2026By:/s/ Jonathan M. Lyons Jonathan M. Lyons Senior Vice President and Chief Financial Officer

shc-202601120001822479FALSE00018224792026-01-122026-01-12

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): January 12, 2026

SOTERA HEALTH COMPANY

(Exact Name of Registrant as Specified in its Charter)

Delaware001-3972947-3531161 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.)

9100 South Hills Blvd, Suite 300 Broadview Heights, Ohio 44147 (Address of Principal Executive Offices) (Zip Code) (440) 262-1410 (Registrant’s telephone number, including area code) Not Applicable (Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of Each ClassTrading Symbol Name of Exchange on which registered

Common stock, $0.01 par value per shareSHCThe Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR 230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR 240.12b-2). Emerging growth company   ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

Item 2.02. Results of Operations and Financial Condition. The information under the heading “Preliminary Financial Results” under Item 7.01, including the press release announcing preliminary revenue results for Sotera Health Company (the “Company”) for full-year 2025 (the “Press Release”), is incorporated by reference into this Item 2.02.

Item 7.01. Regulation FD Disclosure. Preliminary Financial Results On January 12, 2026, the Company issued the Press Release. A copy of the Press Release is attached hereto as Exhibit 99.1. The preliminary revenue results are based on information available to the Company as of January 12, 2026 and are subject to completion of the Company’s year-end financial closing procedures and audit by the Company’s independent registered public accounting firm. The approximation of revenue included in the Press Release is within the guidance provided at the time of the Company’s third quarter earnings release. J.P. Morgan Healthcare Conference Presentation As previously announced on January 7, 2026, management will deliver a business update at the 44th Annual J.P. Morgan Healthcare Conference on January 12, 2026 at approximately 1:30 p.m. Eastern Time. A copy of the Company’s slide presentation and a link to the live presentation, or a replay of the webcast of the presentation, may be accessed via the Investor Relations section of the Company’s website. The information in Item 2.02 and Item 7.01, including Exhibit 99.1, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liability under that section, and shall not be deemed to be incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, unless expressly incorporated by specific reference in such filing.

Item 9.01. Financial Statements and Exhibits. (d) Exhibits Exhibit NumberDescription 99.1Press Release, dated January 12, 2026

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Sotera Health Company (Registrant)

Date: January 12, 2026By:/s/ Jonathan M. Lyons Jonathan M. Lyons Senior Vice President and Chief Financial Officer

shc-202511040001822479FALSE00018224792025-11-042025-11-04

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): November 4, 2025

SOTERA HEALTH COMPANY

(Exact Name of Registrant as Specified in its Charter)

Delaware001-3972947-3531161 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.)

9100 South Hills Blvd, Suite 300 Broadview Heights, Ohio 44147 (Address of Principal Executive Offices) (Zip Code) (440) 262-1410 (Registrant’s telephone number, including area code) Not Applicable (Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of Each ClassTrading Symbol Name of Exchange on which registered

Common stock, $0.01 par value per shareSHCThe Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR 230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR 240.12b-2). Emerging growth company   ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

Item 2.02. Results of Operations and Financial Condition. On November 4, 2025, Sotera Health Company (the “Company”) issued a press release (the “Press Release”) announcing its financial results for the quarter ended September 30, 2025. The Company will hold its previously announced conference call on November 4, 2025, at 9:00 a.m. Eastern Time to discuss its financial results for the quarter. A copy of the Press Release is attached to this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference. The information in this Item 2.02, including Exhibit 99.1, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liability under that section, and shall not be deemed to be incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, unless expressly incorporated by specific reference in such filing.

Item 9.01. Financial Statements and Exhibits. (d) Exhibits Exhibit NumberDescription 99.1Press Release, dated November 4, 2025

104Cover Page Interactive Data File (embedded within the inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Sotera Health Company (Registrant)

Date: November 4, 2025By:/s/ Jonathan M. Lyons Jonathan M. Lyons Senior Vice President and Chief Financial Officer