Brian Chambers - 04 Feb 2026 Form 4 Insider Report for Owens Corning (OC)

Role: Chair, President and CEO, Director
Signature: /s/ Katherine M. Serevitch, Attorney-in-Fact
Issuer symbol: OC
Transactions as of: 04 Feb 2026
Net transactions value: +$3,304,876
Form type: 4
Filing time: 06 Feb 2026, 16:36:07 UTC
Previous filing: 04 Feb 2026
Next filing: 27 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Chambers Brian	Chair, President and CEO, Director	ONE OWENS CORNING PARKWAY, TOLEDO	/s/ Katherine M. Serevitch, Attorney-in-Fact	06 Feb 2026	0001339551

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	OC	$.01 Par Value Common	Award	$3,699,980	+27,855	+8.2%	$132.83	367,773	04 Feb 2026	Direct	F1
transaction	OC	$.01 Par Value Common	Tax liability	$395,103	-2,988	-0.81%	$132.23	364,785	05 Feb 2026	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Restricted stock units granted under the Owens Corning 2023 Stock Plan.
F2	Shares withheld upon vesting of restricted stock units to satisfy tax withholding obligations.