| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Williams John David | Director | ONE OWENS CORNING PARKWAY, TOLEDO | /s/ Katherine M. Serevitch, Attorney-in-Fact | 11 Aug 2025 | 0001453133 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | OC | $.01 Par Value Common | Award | $35,169 | +239 | +0.47% | $147.17 | 51,209 | 07 Aug 2025 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | Accrual of dividend equivalents on deferred stock units. |