Ann Lizabeth Baymiller - 04 Feb 2026 Form 4 Insider Report for Owens Corning (OC)

Role: Chief Information Officer
Signature: /s/ Katherine M. Serevitch, Attorney-in-Fact
Issuer symbol: OC
Transactions as of: 04 Feb 2026
Net transactions value: +$245,055
Form type: 4
Filing time: 06 Feb 2026, 16:36:01 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
Baymiller Ann Lizabeth	Chief Information Officer	ONE OWENS CORNING PARKWAY, TOLEDO	/s/ Katherine M. Serevitch, Attorney-in-Fact	06 Feb 2026	0002101418

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	OC	$.01 Par Value Common	Award	$299,930	+2,258	+36%	$132.83	8,519	04 Feb 2026	Direct	F1
transaction	OC	$.01 Par Value Common	Tax liability	$54,875	-415	-4.9%	$132.23	8,104	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.