Owens Corning (OC) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-07-28 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: Owens Corning (OC) CIK: 0001370946 --- Reporting Owner --- Name: Canovas De La Nuez Jose Manuel CIK: 0002079107 Role: Officer (President, Insulation) --- Non-Derivative Transactions --- [Transaction #1] Security: $.01 Par Value Common Date: 2026-07-28 | Code: F (Payment of exercise/tax) Shares: -1,070 | Price: $143.13 Total Value: $153,149.10 Shares Owned After: 15,705 | Ownership: D (Direct) Footnotes: [F1] Shares withheld upon vesting of restricted stock units to satisfy tax withholding obligations. [F2] The total amount of holdings reflects an acquisition on May 29, 2026 of 140 shares through the Issuer's Employee Stock Purchase Plan, which is exempt under Rule 16b-3(c). --- Footnotes (Complete Index) --- F1: Shares withheld upon vesting of restricted stock units to satisfy tax withholding obligations. F2: The total amount of holdings reflects an acquisition on May 29, 2026 of 140 shares through the Issuer's Employee Stock Purchase Plan, which is exempt under Rule 16b-3(c). --- Signature --- /s/ /s/ Katherine M. Serevitch, Attorney-in-Fact (2026-07-30)