| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Chemnitz Gregory R. | VP General Counsel & Secretary | 6070 PARKLAND BLVD., MAYFIELD HEIGHTS | /s/Michelle R. Mekinda, as Attorney-In-Fact | 19 Feb 2026 | 0001519910 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | MTRN | Common Stock | Sale | $628,360 | -4,000 | -32% | $157.09 | 8,572 | 17 Feb 2026 | Direct | |
| holding | MTRN | Common Stock | 5,343 | 17 Feb 2026 | Held in 401(k) Plan |