Sotera Health affiliate plans sale of 1.14M shares

SHC filed a Form 144 indicating an affiliate’s intent to sell up to 1,144,515 shares of common stock through J.P.

Rhea-AI Filing Summary

SHC filed a Form 144 indicating an affiliate’s intent to sell up to 1,144,515 shares of common stock through J.P. Morgan Securities LLC on the NASDAQ, with an approximate sale date of August 17, 2026. The filing lists an aggregate market value of $21,619,888 for these shares and notes that 285,374,795 shares of common stock are outstanding.

The shares proposed for sale were acquired via executive compensation awards dated June 17, 2016 and March 2, 2026 (including blocks of 241,210 and 53,305 shares), and via a transfer of 850,000 shares associated with Michael B. Petras, Jr., originally acquired on June 17, 2016.

Key Figures

Shares to be sold: 1,144,515 shares Aggregate market value: $21,619,888 Shares outstanding: 285,374,795 shares +4 more

7 metrics

Shares to be sold 1,144,515 shares Common stock proposed for sale under Form 144

Aggregate market value $21,619,888 Value of 1,144,515 shares proposed for sale

Shares outstanding 285,374,795 shares Outstanding common stock referenced in Form 144

Executive compensation grant 241,210 shares Common stock acquired March 2, 2026 via executive compensation

Executive compensation grant 53,305 shares Common stock acquired June 17, 2016 via executive compensation

Transfer block 850,000 shares Common stock transferred to Michael B. Petras, Jr., acquired June 17, 2016

Approximate sale date 08/17/2026 Planned date for sale of Form 144 shares

Key Terms

Form 144, Executive Compensation, aggregate market value, Transfer

4 terms

Form 144 regulatory

"144: Securities To Be Sold"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Executive Compensation financial

"Common Stock | 03/02/2026 | Executive Compensation | Issuer"

Payments and benefits given to a company's top leaders — including base salary, cash bonuses, stock awards, options and retirement or perquisites — designed to compensate and motivate them. Investors care because these packages affect a company’s costs, influence executives’ decisions and signal how well management’s interests line up with shareholders’; like a captain’s contract, the structure of pay can encourage safe navigation toward long-term gains or risky short-term moves that hurt returns.

aggregate market value financial

"Common Stock | J.P. Morgan Securities LLC ... 21619888 | 285374795"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

Transfer financial

"Common Stock | 05/20/2025 | Transfer | Michael B. Petras, Jr."

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does SHC’s Form 144 filing report about planned stock sales?

The Form 144 reports an affiliate’s intent to sell up to 1,144,515 shares of SHC common stock. The planned sales have an indicated aggregate market value of $21,619,888 and are expected to occur on or about August 17, 2026 on NASDAQ.

How many SHC shares are outstanding according to this Form 144?

The filing states that there are 285,374,795 shares of SHC common stock outstanding. This figure provides context for the planned sale of 1,144,515 shares, showing the size of the proposed sale relative to the total share base.

Who is the broker for the SHC Form 144 stock sale?

The planned sale will be executed through J.P. Morgan Securities LLC. The broker’s address is listed as 270 Park Avenue, 10th Floor, New York, NY 10017, and the sale is expected to take place on the NASDAQ market.

How were the SHC shares in this Form 144 originally acquired?

The shares were acquired via executive compensation and a transfer. Executive compensation grants on June 17, 2016 and March 2, 2026 cover blocks of 241,210 and 53,305 shares, plus a transfer of 850,000 shares linked to Michael B. Petras, Jr.

What is the aggregate market value of SHC shares proposed for sale in this Form 144?

The Form 144 lists an aggregate market value of $21,619,888 for the 1,144,515 SHC common shares proposed for sale. This figure reflects the value of the planned disposition at the time of the filing’s preparation.

On what date are the SHC shares expected to be sold under this Form 144?

The approximate sale date given is August 17, 2026. This is the date around which the affiliate expects to begin selling the 1,144,515 SHC common shares through J.P. Morgan Securities LLC on NASDAQ.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/17/2026 - 07:04 PM Accepted by SEC EDGAR 08/17/2026 - 07:04 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001832387
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Sotera Health Company
SEC File Number	001-39729
Address of Issuer	9100 South Hills Boulevard Suite 300 Broadview Heights OHIO 44147
Phone	440-262-1410
Name of Person for Whose Account the Securities are To Be Sold	Michael B. Petras, Jr.
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Chairman, CEO

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common Stock	J.P. Morgan Securities LLC 270 Park Avenue, 10th Floor New York NY 10017	1144515	21619888	285374795	08/17/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common Stock	03/02/2026	Executive Compensation	Issuer			241210	03/02/2026	N/A
Common Stock	06/17/2016	Executive Compensation	Issuer			53305	06/17/2016	N/A
Common Stock	05/20/2025	Transfer	Michael B. Petras, Jr., who acquired the shares on June 17, 2016			850000	06/17/2016	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks	Of the shares filed today, 294,515 shares will be sold by Michael B. Petras, Jr. and 850,000 shares will be sold by the May 2025 Michael B. Petras, Jr. Grantor Retained Annuity Trust, Michael B. Petras, Jr. as Trustee..
Date of Notice	08/17/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Michael B. Petras, Jr.
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)