| 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 | 10 Mar 2026 | 0001519910 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | MTRN | Common Stock | Award | +5 | +0.08% | $0.000000* | 5,935 | 06 Mar 2026 | Direct | ||
| transaction | MTRN | Common Stock | Tax liability | -5 | -0.08% | $144.19* | 5,930 | 09 Mar 2026 | Direct | ||
| holding | MTRN | Common Stock | 5,348 | 06 Mar 2026 | Held in 401(k) Plan |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | MTRN | Restricted Stock Units | Award | +4 | +0.11% | $0.000000* | 3,543 | 06 Mar 2026 | Common Stock | 4 | 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. |