| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| BUZBY DAVID S | Director | FOUR EMBARCADERO CENTER, SUITE 710, SAN FRANCISCO | /s/ Saul R. Laureles, Attorney-in-Fact | 2025-06-02 | 0001244203 |
| 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 | $0 | +110K | +92.03% | $0.00 | 230K | May 29, 2025 | Direct | |
| holding | STEM | Common Stock, Par Value $0.0001 Per Share | 641K | May 29, 2025 | By the David S. Buzby Revocable Trust |
| 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 | -110K | -100% | $0.00 | 0 | May 29, 2025 | Common Stock, Par Value 0.0001 Per Share | 110K | Direct | F1, F2 |
| Id | Content |
|---|---|
| F1 | Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock. |
| F2 | On May 29, 2024, the Reporting Person was granted 110,236 RSUs vesting 100% on May 29, 2025. |