SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* Klaben Matthew J (Last) (First) (Middle) C/O SOTERA HEALTH COMPANY 9100 SOUTH HILLS BDVD, SUITE 300 (Street) BROADVIEW HEIGHTS OH 44147 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol Sotera Health Co [ SHC ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) SVP, GC and Secretary
	3. Date of Earliest Transaction (Month/Day/Year) 03/22/2021
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, $0.01 par value per share ("Common Stock")	03/22/2021		S		41,952(1)	D	$26.1225(2)	327,286(3)	I	By grantor trust
Common Stock								31,304(4)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Options	$23							(5)	11/20/2030	Common Stock	134,161		134,161(5)	D

Explanation of Responses:

1. On March 22, 2021, Mr. Klaben sold a total of 41,952 shares of Common Stock of Sotera Health Company in an underwritten public secondary offering (the "Offering").

2. Reflects a price equal to the Offering price per share less underwriting discounts and commissions payable thereon, as disclosed in the company's Prospectus 424(b)(4), filed with the United States Securities and Exchange Commission on March 18, 2021.

3. Consists of 196,997 shares of vested Common Stock and 130,289 shares of unvested Common Stock as of March 22, 2021. 36,529 of the unvested shares of Common Stock will vest on a daily basis, pro rata through November 15, 2021. 93,760 of the unvested shares of Common Stock will vest as of the first date on which (i) certain investment funds and entities affiliated with Warburg Pincus LLC and GTCR, LLC (the "Sponsors") have received two and one-half times their invested capital in the company and (ii) the Sponsors' internal rate of return exceeds twenty percent.

4. These securities consist of restricted stock units ("RSUs") that were granted on November 20, 2020, 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 receive one share of Common Stock, subject to vesting conditions. The RSUs vest in four equal installments on each of the first four anniversaries of the date of grant, subject to the Mr. Klaben's continued service through each such date.

5. These options were granted on November 20, 2020, pursuant to the terms of a stock option agreement under the 2020 Incentive Plan. The options vest in four equal installments on each of the first four anniversaries of the date of grant, subject to Mr. Klaben's continued service through each such date.

Remarks:

The Power of Attorney for Mr. Matthew J. Klaben is filed as an exhibit to the Form 3 filed on November 20, 2020, which is hereby incorporated by reference.

	/s/ Jessica L. M. H. Epp, Attorney-in-Fact	03/24/2021
	** Signature of Reporting Person	Date
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