| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Chambers Brian | Chair, President and CEO, Director | ONE OWENS CORNING PARKWAY, TOLEDO | /s/ Katherine M. Serevitch, Attorney-in-Fact | 17 Dec 2025 | 0001339551 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | OC | $.01 Par Value Common | Tax liability | $125,246 | -1,089 | -0.31% | $115.01 | 347,420 | 15 Dec 2025 | Direct |