STEM's three largest insider shareholders as of March 23, 2026 are Peak Sponsor Llc Star (TenPercentOwner, 9.51Mn shares), Eric J Scheyer (TenPercentOwner, 9.51Mn shares), Anil Tammineedi (Director, 4.29Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Peak Sponsor Llc Star | 9,509,626 | 0 | 30 Apr, 2021 | |
| Anil Tammineedi | 0 | 4,289,849 | 09 Sep, 2022 | |
| Robert Schaefer | President, Transformational | 716,110 | 0 | 20 Mar, 2024 |
| Mark William Triplett | Chief Operating Officer | 323,946 | 0 | 14 Apr, 2022 |
| Anil Tammineedi | 159,747 | 0 | 02 Jun, 2025 | |
| Laura D Tyson | 159,747 | 0 | 02 Jun, 2025 | |
| Ira M Birns | 134,420 | 0 | 02 Jun, 2025 | |
| Krishna Shivram | 62,222 | 0 | 02 Jun, 2025 | |
| Jane Woodward | 49,511 | 0 | 10 Jun, 2024 | |
| Lisa L Troe | 19,872 | 0 | 20 Jun, 2023 | |
| Matthew Tappin | President, Software Products | 2,823 | 0 | 13 Mar, 2026 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 11 Mar, 2026 | Matthew Tappin | Common Stock, Par Value $0.0001 Per Share | D | 402 | $10.83 | 2,823 | D | S |
| 07 Mar, 2026 | Matthew Tappin | Common Stock, Par Value $0.0001 Per Share | A | 1,458 | - | 3,880 | D | M |
| 10 Mar, 2026 | Matthew Tappin | Common Stock, Par Value $0.0001 Per Share | D | 655 | $11.12 | 3,225 | D | S |
| 07 Mar, 2026 | Matthew Tappin | Restricted Stock Unit | D | 1,458 | $0.00 | 1,459 | D | M |
| 03 Mar, 2026 | Matthew Tappin | Common Stock, Par Value $0.0001 Per Share | D | 300 | $9.67 | 2,607 | D | S |
| 04 Mar, 2026 | Matthew Tappin | Common Stock, Par Value $0.0001 Per Share | D | 185 | $10.00 | 2,422 | D | S |
| 01 Mar, 2026 | Matthew Tappin | Common Stock, Par Value $0.0001 Per Share | A | 670 | - | 2,907 | D | M |
| 26 Feb, 2026 | Matthew Tappin | Restricted Stock Unit | A | 25,800 | $0.00 | 25,800 | D | A |
| 26 Feb, 2026 | Matthew Tappin | Performance Stock Unit | A | 17,200 | $0.00 | 17,200 | D | A |
| 01 Mar, 2026 | Matthew Tappin | Restricted Stock Unit | D | 670 | $0.00 | 0 | D | M |
| 20 Feb, 2026 | Matthew Tappin | Common Stock, Par Value $0.0001 Per Share | D | 366 | $11.40 | 2,237 | D | S |
| 19 Feb, 2026 | Matthew Tappin | Common Stock, Par Value $0.0001 Per Share | D | 522 | $11.30 | 2,603 | D | F |
| 15 Feb, 2026 | Matthew Tappin | Common Stock, Par Value $0.0001 Per Share | A | 1,253 | - | 3,125 | D | M |
| 15 Feb, 2026 | Matthew Tappin | Restricted Stock Unit | D | 1,253 | $0.00 | 0 | D | M |
| 11 Nov, 2025 | Matthew Tappin | Common Stock, Par Value $0.0001 Per Share | D | 9,584 | $17.70 | 1,872 | D | S |
| 18 Nov, 2025 | Rahul Shukla | Common Stock, Par Value $0.0001 Per Share | D | 3,674 | $16.21 | 0 | D | S |
| 07 Nov, 2025 | Rahul Shukla | Common Stock, Par Value $0.0001 Per Share | A | 5,750 | - | 5,750 | D | M |
| 07 Nov, 2025 | Matthew Tappin | Common Stock, Par Value $0.0001 Per Share | A | 15,000 | - | 16,872 | D | M |
| 10 Nov, 2025 | Rahul Shukla | Common Stock, Par Value $0.0001 Per Share | D | 2,076 | $18.27 | 3,674 | D | F |
| 10 Nov, 2025 | Matthew Tappin | Common Stock, Par Value $0.0001 Per Share | D | 5,416 | $18.27 | 11,456 | D | F |