| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Chadwick Shelly Marie | Vice President, Finance & CFO | 6070 PARKLAND BLVD., MAYFIELD HTS. | /s/Michelle R. Mekinda, as Attorney-In-Fact | 2025-09-09 | 0001688289 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | MTRN | Restricted Stock Units | Award | $0 | +18 | +0.13% | $0.00 | 14.3K | Sep 5, 2025 | Common Stock | 18 | Direct | F1, F2, F3 |
| Id | Content |
|---|---|
| F1 | Each restricted stock unit represents a right to receive one share of MTRN common stock. |
| F2 | These units, which were acquired upon the reinvestment of dividend equivalents, will vest at the same time as the restricted stock units to which they relate. |
| F3 | Expiration Date is the same as the Date Exercisable. |