Jose Manuel Canovas de la Nuez - 02 Feb 2026 Form 4 Insider Report for Owens Corning (OC)

Role: President, Insulation
Signature: /s/ Katherine M. Serevitch, Attorney-in-Fact
Issuer symbol: OC
Transactions as of: 02 Feb 2026
Net transactions value: -$58,886
Form type: 4
Filing time: 04 Feb 2026, 16:20:53 UTC
Previous filing: 31 Jul 2025
Next filing: 06 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Canovas De La Nuez Jose Manuel	President, Insulation	ONE OWENS CORNING PARKWAY, TOLEDO	/s/ Katherine M. Serevitch, Attorney-in-Fact	04 Feb 2026	0002079107

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	OC	$.01 Par Value Common	Tax liability	$58,886	-482	-3.9%	$122.17	11,904	02 Feb 2026	Direct	F1, F2

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

Explanation of Responses:

Id	Content
F1	Shares withheld upon vesting of restricted stock units to satisfy tax withholding obligations.
F2	The total amount of holdings reflects an acquisition on November 28, 2025 of 10 shares through the Issuer's Employee Stock Purchase Plan which is exempt under Rule 16b-3(c).