| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Carlson Michael James | President, Managed Services | 1400 POST OAK BOULEVARD, SUITE 560, HOUSTON | /s/ Sarah Dunn, attorney-in-fact | 10 Mar 2026 | 0001948274 |
| 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 | +3,541 | +20% | 21,537 | 07 Mar 2026 | Direct | F1 | ||
| transaction | STEM | Common Stock, Par Value $0.0001 Per Share | Sale | $23,118 | -2,079 | -9.7% | $11.12 | 19,458 | 10 Mar 2026 | 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 | -3,541 | -50% | $0.000000* | 3,516 | 07 Mar 2026 | Common Stock, Par Value $0.0001 Per Share | 3,541 | 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 restricted stock units on March 7, 2026. This "sell to cover" transaction does not represent a discretionary trade by the reporting person. |
| F3 | On May 28, 2024, the reporting person was granted 10,625 RSUs vesting in three near equal annual installments, the second of which vested on March 7, 2026. |