| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Doerfler Mari | Vice President and Controller | ONE OWENS CORNING PARKWAY, TOLEDO | /s/ Katherine M. Serevitch, Attorney-in-Fact | 04 Feb 2026 | 0001957375 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | OC | $.01 Par Value Common | Tax liability | $46,302 | -379 | -7.2% | $122.17 | 4,860 | 02 Feb 2026 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | Shares withheld upon vesting of restricted stock units to satisfy tax withholding obligations. |