Alexander Dimitrief - 02 Mar 2026 Form 4 Insider Report for Sotera Health Co (SHC)

Reporting relationship: SVP, General Counsel and Sec.
Issuer ticker: SHC
Reported as of: 02 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 04 Mar 2026, 20:55:56 UTC
Prior SEC filing: 08 Dec 2025
Next SEC filing: 02 Apr 2026
Source filing: View source filing
Reporting owner signature: Matthew J. Klaben, Attorney-in-Fact

Key filing fact

Alexander Dimitrief filed Form 4 for Sotera Health Co (SHC) on 04 Mar 2026.

Key facts

This page summarizes Alexander Dimitrief's Form 4 filing for Sotera Health Co (SHC).
4 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 04 Mar 2026, 20:55.

Change

Previous filing in this sequence was filed on 08 Dec 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001614732 Primary reporting owner

DIMITRIEF ALEXANDER

Relationship: SVP, General Counsel and Sec.
Address: 9100 SOUTH HILLS BLVD, SUITE 300, BROADVIEW HEIGHTS
Signature: Matthew J. Klaben, Attorney-in-Fact
Signature date: 04 Mar 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

SHC transaction

Common Stock, $0.01 par value per share ("Common Stock")

Tax liability

Transaction value
Shares: -7,941
Change %: -2.4%
Price: $15.91^*
Shares after: 326,784
Date: 02 Mar 2026
Ownership: Direct
Footnotes: F1

SHC transaction

Common Stock

Options Exercise

Transaction value
Shares: +16,816
Change %: +5.1%
Price
Shares after: 343,600
Date: 02 Mar 2026
Ownership: Direct
Footnotes: F2, F4

SHC transaction

Common Stock

Tax liability

Transaction value
Shares: -23,619
Change %: -6.9%
Price: $15.91^*
Shares after: 319,981
Date: 02 Mar 2026
Ownership: Direct
Footnotes: F3

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

SHC transaction Derivative

Performance RSUs

Options Exercise

Transaction value
Shares: -16,816
Change %: -60%
Price
Shares after: 11,210
Date: 02 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 16,816
Exercise price
Footnotes: F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

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"). Each RSU represents the Reporting Person's right to recieve one share of Common Stock, subject to vesting conditions.

Footnote F2

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 16,816 shares of Common Stock.

Footnote F3

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 50,448 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.

Footnote F4

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 16,816 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.

SEC remarks

The Power of Attorney for Mr. Dimitrief is filed as an exhibit to the Form 3 filed on November 8, 2022, which is hereby incorporated by reference.