[Form 4] Owens Corning Insider Trading Activity

Rhea-AI Filing Summary

Owens Corning director John David Williams reported a stock award tied to board compensation. He acquired 382 shares of $.01 par value common stock on 2026-05-08 as a grant, described as the deferred share portion of his quarterly director retainer and fees. Following this award, his direct holdings increased to 54,171.573 shares. This filing reflects routine non-cash director compensation rather than an open-market purchase or sale.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Williams John David

Role null

Type	Security	Shares	Price	Value
Grant/Award	$.01 Par Value Common	382	$121.67	$46K

Holdings After Transaction: $.01 Par Value Common — 54,171.573 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares granted: 382 shares Grant value per share: $121.67 per share Shares held after grant: 54,171.573 shares

3 metrics

Shares granted 382 shares Director stock award on May 8, 2026

Grant value per share $121.67 per share Indicated price for the 382-share award

Shares held after grant 54,171.573 shares Total direct Owens Corning holdings after transaction

Key Terms

Grant, award, or other acquisition, Deferred share, quarterly Director retainer/fees

3 terms

Grant, award, or other acquisition financial

"transaction_code_description: Grant, award, or other acquisition"

Deferred share financial

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

quarterly Director retainer/fees financial

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

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^*

Williams John David

(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)

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

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		A		382(1)	A	$121.67	54,171.573	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	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 John David Williams?

Owens Corning director John David Williams received a stock award of 382 common shares. The Form 4 classifies this as a grant or award acquisition, representing deferred shares from his quarterly director retainer and fees, rather than an open-market trade.

Was the Owens Corning (OC) Form 4 transaction a stock purchase or a grant?

The transaction was a grant, not a market purchase. The Form 4 uses code A, described as a grant, award, or other acquisition, and footnotes explain it represents the deferred share portion of quarterly director retainer and fee compensation.

How many Owens Corning (OC) shares did director John David Williams receive?

He received 382 shares of $.01 par value Owens Corning common stock at an indicated value of $121.67 per share. These shares are part of his deferred quarterly director retainer and fees, increasing his overall direct ownership position in the company.

What is John David Williams’ Owens Corning (OC) shareholding after this Form 4 grant?

After the 382-share grant, John David Williams directly holds 54,171.573 Owens Corning common shares. This figure, reported in the Form 4, reflects his position following the compensation-related stock award on May 8, 2026.

How is the Owens Corning (OC) director compensation structured in this Form 4?

Part of the director’s quarterly compensation is paid in deferred shares. The Form 4 footnote states the 382-share award represents the deferred share portion of John David Williams’ quarterly director retainer and fees, aligning his compensation partly with company equity.