| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| HULL CHARLES W | EVP & Chief Technology Officer | 333 THREE D SYSTEMS CIRCLE, ROCK HILL | Andrew WB Wright, Attorney-in-Fact for Charles W. Hull | 09 Sep 2025 | 0001105964 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | DDD | Common Stock | Tax liability | $10,449 | -4,929 | -3.3% | $2.12 | 145,129 | 05 Sep 2025 | Direct | F1 |
| holding | DDD | Common Stock | 331,955 | 05 Sep 2025 | By Trust | F2 |
| Id | Content |
|---|---|
| F1 | Shares reported were withheld to satisfy tax withholding obligations with respect to the vesting of a grant of restricted stock originally made on September 5, 2024. |
| F2 | By the Charles William Hull and Charlene Antoinette Hull 1992 Revocable Living Trust for which the Reporting Person serves as trustee. |