| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Mendez-Andino Jose | EVP, Chief R&D Officer | ONE OWENS CORNING PARKWAY, TOLEDO | /s/ Katherine M. Serevitch, Attorney-in-Fact | 17 Dec 2025 | 0001855650 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | OC | $.01 Par Value Common | Tax liability | $21,967 | -191 | -1.2% | $115.01 | 15,396 | 15 Dec 2025 | Direct |