Owens Corning (OC) director receives 412-share deferred fee award

Rhea-AI Filing Summary

Owens Corning director Maryann T. Mannen received a stock award of 412 common shares as part of her director compensation. The award, dated February 27, 2026, was recorded at a price of $122.07 per share and is described as the deferred share portion of her quarterly director retainer and fees.

After this grant, she holds a total of 27,247.017 Owens Corning common shares directly. This Form 4 reflects a compensation-related acquisition rather than an open‑market purchase or sale.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Mannen Maryann T.

Role Director

Type	Security	Shares	Price	Value
Grant/Award	$.01 Par Value Common	412	$122.07	$50K

Holdings After Transaction: $.01 Par Value Common — 27,247.017 shares (Direct)

Footnotes (1)

1. [object Object]

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^*

Mannen Maryann T.

(Last) (First) (Middle)

ONE OWENS CORNING PARKWAY

(Street)

TOLEDO OH 43659

(City) (State) (Zip)

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

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

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
02/27/2026

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
$.01 Par Value Common	02/27/2026		A		412(1)	A	$122.07	27,247.017	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:

1. Deferred share portion of quarterly Director retainer/fees.

Remarks:

	/s/ Katherine M. Serevitch, Attorney-in-Fact	03/03/2026
	** 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.

FAQ

What insider transaction did Owens Corning (OC) report for Maryann T. Mannen?

Owens Corning reported that director Maryann T. Mannen received a grant of 412 common shares. The grant is recorded as a compensation-related acquisition and represents the deferred share portion of her quarterly director retainer and fees.

How many Owens Corning (OC) shares did Maryann T. Mannen acquire and at what price?

Maryann T. Mannen acquired 412 Owens Corning common shares at a recorded price of $122.07 per share. This award was granted as part of her quarterly director retainer and fees, rather than through an open-market transaction.

What is Maryann T. Mannen’s total Owens Corning (OC) share ownership after this Form 4 transaction?

Following the reported grant, Maryann T. Mannen directly owns 27,247.017 Owens Corning common shares. This total reflects the addition of 412 shares received as a deferred share portion of her quarterly director retainer and fees.

Is the Owens Corning (OC) Form 4 transaction a market purchase or part of director compensation?

The Form 4 transaction is part of director compensation, not a market purchase. The 412 common shares granted to Maryann T. Mannen are described as the deferred share portion of her quarterly director retainer and fees.

What does the transaction code on Maryann T. Mannen’s Owens Corning (OC) Form 4 indicate?

The transaction code is classified as a grant, award, or other acquisition. This means the 412 Owens Corning common shares were received by Maryann T. Mannen as a compensation-related grant rather than bought or sold on the open market.