Michael B. Petras Jr. - 02 Mar 2026 Form 4 Insider Report for Sotera Health Co (SHC)

Reporting relationship: Chairman & CEO, Director
Issuer ticker: SHC
Reported as of: 02 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 04 Mar 2026, 21:17:59 UTC
Prior SEC filing: 10 Dec 2025
Source filing: View source filing
Reporting owner signature: Gregory S. Harvey, Attorney-in-Fact

Key filing fact

Michael B. Petras Jr. filed Form 4 for Sotera Health Co (SHC) on 04 Mar 2026.

Key facts

This page summarizes Michael B. Petras Jr.'s Form 4 filing for Sotera Health Co (SHC).
8 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 04 Mar 2026, 21:17.

Change

Previous filing in this sequence was filed on 10 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 0001832387 Primary reporting owner

Petras Michael B. Jr.

Relationship: Chairman & CEO, Director
Address: C/O SOTERA HEALTH COMPANY, 9100 SOUTH HILLS BLVD, SUITE 300, BROADVIEW HEIGHTS
Signature: Gregory S. Harvey, 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: -31,339
Change %: -5.7%
Price: $15.91^*
Shares after: 521,451
Date: 02 Mar 2026
Ownership: Direct
Footnotes: F1

SHC transaction

Common Stock

Tax liability

Transaction value
Shares: -40,302
Change %: -7.7%
Price: $15.91^*
Shares after: 481,149
Date: 02 Mar 2026
Ownership: Direct
Footnotes: F2

SHC transaction

Common Stock

Options Exercise

Transaction value
Shares: +89,686
Change %: +19%
Price
Shares after: 570,835
Date: 02 Mar 2026
Ownership: Direct
Footnotes: F3

SHC transaction

Common Stock

Tax liability

Transaction value
Shares: -39,552
Change %: -6.9%
Price: $15.91^*
Shares after: 531,283
Date: 02 Mar 2026
Ownership: Direct
Footnotes: F4

SHC transaction

Common Stock

Tax liability

Transaction value
Shares: -79,104
Change %: -15%
Price: $15.91^*
Shares after: 452,179
Date: 02 Mar 2026
Ownership: Direct
Footnotes: F5

SHC transaction

Common Stock

Award

Transaction value
Shares: +240,248
Change %: +53%
Price: $0.000000^*
Shares after: 692,427
Date: 02 Mar 2026
Ownership: Direct
Footnotes: F6

SHC holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 4,819,393
Date: 02 Mar 2026
Ownership: By Grantor Trust

Reported derivative securities

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

SHC transaction Derivative

Share Appreciation Units

Options Exercise

Transaction value
Shares: -89,686
Change %: -60%
Price
Shares after: 59,790
Date: 02 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 89,686
Exercise price
Footnotes: F3

SHC transaction Derivative

Share Appreciation Units

Award

Transaction value
Shares: +120,124
Change %
Price: $0.000000^*
Shares after: 120,124
Date: 02 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 120,124
Exercise price
Footnotes: F7

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 7 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 71,063 Restricted Stock Units ("RSUs") granted to the Reporting Person on March 6, 2023. This award was granted pursuant to the terms of an RSU agreement under the Sotera Health Company 2020 Incentive Plan ("2020 Incentive Plan"). Each RSU represents the Reporting Person's right to receive one share of Common Stock, subject to vesting conditions

Footnote F2

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 91,386 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. Each RSU represents the Reporting Person's right to recieve one share of Common Stock, subject to vesting conditions.

Footnote F3

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.

Footnote F4

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 89,686 SAUs granted to the Reporting Person on March 3, 2025. This award was granted pursuant to the terms of a SAU Agreement under the 2020 Incentive Plan. Each SAU represents the Reporting Person's right to recieve one share of Common Stock, subject to performance.

Footnote F5

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 179,372 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.

Footnote F6

These securities consist of RSUs that were granted on March 2, 2026, pursuant to the terms of an RSU agreement under the 2020 Incentive Plan. 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.

Footnote F7

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.

SEC remarks

The Power of Attorney for Mr. Petras is filed as an exhibit to the Form 4 filed on September 12, 2024, which is incorporated by reference.