PETRAS MICHAEL B. JR. (Chairman & CEO) received a stock award from SOTERA HEALTH CO

Compensation award — not an open‑market transaction. Less informative as a directional signal.

A · 1 award

PETRAS MICHAEL B. JR.

Filed: 3/4/2025ACC: 0000950170-25-032994

InsiderPETRAS MICHAEL B. JR.CIK 1832387

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IssuerSOTERA HEALTH COCIK 1822479

DirectorOfficer· Chairman & CEO

Since Nov 2020

+347.58K

Net shares

Net buyer

$1.26M

Total sold

Open market trades

0B · 0S

Total transactions

448.43K acquired · 100.85K disposed

Non-Derivative Transactions4

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

Direct

F · Tax Withholding

−27.99K

Price / share

$12.47

Trade value

$349.04K

% of position

4.2%

3/2/2025

670.50K→642.51K

Common Stock

Direct

F · Tax Withholding

−31.87K

Price / share

$12.47

Trade value

$397.44K

% of position

5.0%

3/2/2025

642.51K→610.64K

Common Stock

Direct

F · Tax Withholding

−40.99K

Price / share

$12.47

Trade value

$511.11K

% of position

6.7%

3/2/2025

610.64K→569.65K

Common Stock

Direct

A · Award

+298.95K

Price / share

—

Trade value

—

% of position

52.5%

3/3/2025

569.65K→868.60K

Total

Net shares

+198.10K

Net value

-$1.26M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock, $0.01 par value per share ("Common Stock") Direct	3/2/2025	F · Tax Withholding	−27.99K	$12.47	$349.04K	4.2%	670.50K	642.51K
Common Stock Direct	3/2/2025	F · Tax Withholding	−31.87K	$12.47	$397.44K	5.0%	642.51K	610.64K
Common Stock Direct	3/2/2025	F · Tax Withholding	−40.99K	$12.47	$511.11K	6.7%	610.64K	569.65K
Common Stock Direct	3/3/2025	A · Award	+298.95K	—	—	52.5%	569.65K	868.60K
Total			+198.10K		-$1.26M

Derivative Transactions1

Performance Stock Units

Direct

A · Award

Converts to

Common Stock

149.48K shares

+149.48K

Strike price

Held after

149.48K

Exercisable

—

3/3/2025

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Performance Stock Units Direct	Common Stock149.48K shares	3/3/2025	A · Award	+149.48K		—	149.48K

Non-Derivative Holdings (Post-Transaction)2

Common Stock

Indirect

Shares owned5.21M

Common Stock

Indirect

Shares owned39.24K

Total

5.25M indirect5.25M

Security Title	Shares Owned	Ownership Type
Common Stock	5.21M	Indirect
Common Stock	39.24K	Indirect
Total	5.25M	5.25M indirect

Derivative Holdings (Post-Transaction)5

Stock Options

Direct

Underlying security

Common Stock

Underlying shares

2.11M

Shares owned

2.11M

Exercise price

6.37

Expiration

—

Exercise window

—

Stock Options

Direct

Underlying security

Common Stock

Underlying shares

1.12M

Shares owned

1.12M

Exercise price

Expiration

—

Exercise window

—

Stock Options

Direct

Underlying security

Common Stock

Underlying shares

404.09K

Shares owned

404.09K

Exercise price

17.59

Expiration

—

Exercise window

—

Stock Options

Direct

Underlying security

Common Stock

Underlying shares

544.51K

Shares owned

544.51K

Exercise price

14.59

Expiration

—

Exercise window

—

Stock Options

Direct

Underlying security

Common Stock

Underlying shares

478.93K

Shares owned

478.93K

Exercise price

20.03

Expiration

—

Exercise window

—

Total

Underlying

4.65M

Owned

4.65M

Security	Underlying	Exercise Price	Exercise Window	Expiration	Underlying Shares	Shares Owned
Stock Options Direct	Common Stock	6.37	—	—	2.11M	2.11M
Stock Options Direct	Common Stock	23	—	—	1.12M	1.12M
Stock Options Direct	Common Stock	17.59	—	—	404.09K	404.09K
Stock Options Direct	Common Stock	14.59	—	—	544.51K	544.51K
Stock Options Direct	Common Stock	20.03	—	—	478.93K	478.93K
Total					4.65M	4.65M