| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| DeStefano David | Director | C/O VERTEX, INC., 2301 RENAISSANCE BLVD, KING OF PRUSSIA | /s/ Lisa Coleman, Attorney-in-Fact | 26 Feb 2026 | 0001818526 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | VERX | Class A Common Stock | Options Exercise | $0 | +109,233 | +9.1% | $0.000000 | 1,307,500 | 24 Feb 2026 | Direct | |
| transaction | VERX | Class A Common Stock | Tax liability | $689,295 | -51,983 | -4% | $13.26 | 1,255,517 | 24 Feb 2026 | Direct | |
| holding | VERX | Class A Common Stock | 204,032 | 24 Feb 2026 | By Family Trusts | F1 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | VERX | Restricted Stock Units | Options Exercise | $0 | -109,233 | -100% | $0.000000 | 0 | 24 Feb 2026 | Class A Common Stock | 109,233 | Direct | F2, F3 |
| Id | Content |
|---|---|
| F1 | Represents securities held by individual trusts for the benefit of the Reporting Person's three adult children. The Reporting Person's spouse serves as a trustee of each such trust. |
| F2 | Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock. |
| F3 | This restricted stock unit award is fully vested. |