Owens Corning (NYSE: OC) VP Doerfler sells 1,926 company shares

Rhea-AI Filing Summary

Owens Corning Vice President and Controller Mari Doerfler reported an open-market sale of 1,926 shares of $.01 par value common stock at an average price of $120.916 per share. After this transaction, she directly holds 3,093 Owens Corning shares.

Insider Trade Summary

Net Seller: 1,926 shares ($232,884)

Net Sell 1 txn

Insider Doerfler Mari

Role Vice President and Controller

Sold 1,926 shs ($233K)

Type	Security	Shares	Price	Value
Sale	$.01 Par Value Common	1,926	$120.916	$233K

Holdings After Transaction: $.01 Par Value Common — 3,093 shares (Direct, null)

Footnotes (1)

Key Figures

Shares sold: 1,926 shares Sale price: $120.916 per share Shares owned after: 3,093 shares

3 metrics

Shares sold 1,926 shares Open-market sale of common stock

Sale price $120.916 per share Average sale price on transaction date

Shares owned after 3,093 shares Direct holdings following transaction

Key Terms

open-market sale, non-derivative, Form 4

3 terms

open-market sale financial

"transaction_action: "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

non-derivative financial

"transaction_type: "non-derivative""

Form 4 regulatory

"INSIDER FILING DATA (Form 4)"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

Form 4 Insider Transactions: What Each Field Means →

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).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Doerfler Mari

(Last) (First) (Middle)

ONE OWENS CORNING PARKWAY

(Street)

TOLEDO OHIO 43659

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Owens Corning [ OC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Vice President and Controller

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/08/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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
$.01 Par Value Common	05/08/2026		S		1,926	D	$120.916	3,093	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

Explanation of Responses:

Remarks:

	/s/ Katherine M. Serevitch, Attorney-in-Fact	05/12/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Owens Corning (OC) report for Mari Doerfler?

Owens Corning reported that Vice President and Controller Mari Doerfler executed an open-market sale of 1,926 shares of $.01 par value common stock. The sale was recorded on a Form 4 insider trading report.

How many Owens Corning (OC) shares did Mari Doerfler sell and at what price?

Mari Doerfler sold 1,926 Owens Corning common shares in an open-market transaction at an average price of $120.916 per share. This transaction reflects a standard insider sale reported under SEC rules.

How many Owens Corning (OC) shares does Mari Doerfler hold after the sale?

Following the reported transaction, Mari Doerfler directly holds 3,093 Owens Corning common shares. This figure represents her remaining direct ownership position after the 1,926-share open-market sale disclosed in the Form 4.

What is Mari Doerfler’s role at Owens Corning (OC) in this Form 4 filing?

In this Form 4 filing, Mari Doerfler is identified as an officer of Owens Corning, serving as Vice President and Controller. Her position makes her a reporting person required to disclose transactions in company stock.

Was the Owens Corning (OC) insider transaction a buy or a sell?

The transaction reported was a sell. Mari Doerfler executed an open-market sale of 1,926 Owens Corning common shares, classified under SEC transaction code “S” for a sale in the open market or private transaction.