Sotera Health Co

SHC

Form 4 • Statement of Changes in Beneficial Ownership

SEC Accession Number: 0001193125-26-092231
Filing date: Mar 4, 2026
Earliest execution date: Mar 2, 2026
Reporting Owners: Petras Michael B. Jr. (CEO)

Summary

Type

Sell

Net shares

+49,951

% of shares

0.67%

Amount (USD)

$3,027,625

Insider confidence score

77.5 out of 100

Positive

  • Significant buy (≥0.5% of shares)
  • Very large buy amount ($1M+)

Stock transactions

Transaction 1

Security

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

Action

Tax_withhold

Date

2026-03-02

Code

F

Net shares

-31,339.0

Price per Share

$15.91

Amount (USD)

$498,603.49

Acquired/Disposed

Disposed

Shares Owned Before

552,790.0

Shares Owned After

521,451.0

Transaction 2

Security

Common Stock

Action

Tax_withhold

Date

2026-03-02

Code

F

Net shares

-40,302.0

Price per Share

$15.91

Amount (USD)

$641,204.82

Acquired/Disposed

Disposed

Shares Owned Before

521,451.0

Shares Owned After

481,149.0

Transaction 3

Security

Common Stock

Action

Exercise

Date

2026-03-02

Code

M

Net shares

+89,686.0

Acquired/Disposed

Acquired

Shares Owned Before

481,149.0

Shares Owned After

570,835.0

Transaction 4

Security

Common Stock

Action

Tax_withhold

Date

2026-03-02

Code

F

Net shares

-39,552.0

Price per Share

$15.91

Amount (USD)

$629,272.32

Acquired/Disposed

Disposed

Shares Owned Before

570,835.0

Shares Owned After

531,283.0

Transaction 5

Security

Common Stock

Action

Tax_withhold

Date

2026-03-02

Code

F

Net shares

-79,104.0

Price per Share

$15.91

Amount (USD)

$1,258,544.64

Acquired/Disposed

Disposed

Shares Owned Before

531,283.0

Shares Owned After

452,179.0

Transaction 6

Security

Common Stock

Action

Grant

Date

2026-03-02

Code

A

Net shares

+240,248.0

Acquired/Disposed

Acquired

Shares Owned Before

452,179.0

Shares Owned After

692,427.0

Derivative Transactions

Transaction 1

Security

Share Appreciation Units

Action

Exercise

Date

2026-03-02

Code

M

Net shares

-89,686.0

Acquired/Disposed

Disposed

Shares Owned Before

149,476.0

Shares Owned After

59,790.0

Transaction 2

Security

Share Appreciation Units

Action

Grant

Date

2026-03-02

Code

A

Net shares

+120,124.0

Acquired/Disposed

Acquired

Shares Owned Before

0.0

Shares Owned After

120,124.0

Filing's footnotes

1. 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

2. 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.

3. 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.

4. 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.

5. 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.

6. 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.

7. 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.

This page is for informational purposes only. While we strive for accuracy, the summary may contain inaccuracies or omissions. Please refer to the official SEC filing for authoritative information. Open the SEC filing.