| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Tappin Matthew | President, Software Products | 1400 POST OAK BOULEVARD, SUITE 560, HOUSTON | /s/ Sarah Dunn, attorney-in-fact | 12 Nov 2025 | 0001986259 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | STEM | Common Stock, Par Value $0.0001 Per Share | Options Exercise | +15,000 | +801% | 16,872 | 07 Nov 2025 | Direct | F1 | ||
| transaction | STEM | Common Stock, Par Value $0.0001 Per Share | Tax liability | $98,950 | -5,416 | -32% | $18.27 | 11,456 | 10 Nov 2025 | Direct | F2 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | STEM | Restricted Stock Unit | Options Exercise | $0 | -15,000 | -100% | $0.000000 | 0 | 07 Nov 2025 | Common Stock, Par Value $0.0001 Per Share | 15,000 | Direct | F1, F3 |
| Id | Content |
|---|---|
| F1 | Each restricted stock unit ("RSU") converted into a share of common stock on a one-for-one basis. |
| F2 | Represents shares of common stock automatically sold to cover the reporting person's tax liability in connection with the settlement of RSUs. This "sell to cover" transaction does not represent a discretionary trade by the reporting person. |
| F3 | On November 1, 2024 the reporting person was granted 15,000 RSUs, vesting 100% on November 7, 2025. |