As of April 28, 2026, the three largest insider holders of SLDP are Erik J Anderson (Director, 1.01Mn shares), Erik J Anderson (Director, 693.90K shares), Susan M Kreh (Director, 307.49K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Energy Technologies, Llc Volta | - | 0 | 17,399,807 | 27 Jun, 2022 |
| Douglas M Campbell | Chief Executive Officer | 9,700,214 | 0 | 31 Aug, 2022 |
| Plus Acquisition Sponsor Iii Llc Decarbonization | - | 0 | 8,390,000 | 27 Oct, 2021 |
| Scoter John C. Van | President Ceo | 5,180,161 | 0 | 02 Apr, 2026 |
| David M Leuschen | - | 0 | 4,738,454 | 26 Jan, 2023 |
| Linda C. Heller | Cfo, Treasurer, Secretary | 2,157,276 | 0 | 02 Apr, 2026 |
| Joshua Buettner-Garrett | Chief Technology Officer | 1,463,443 | 0 | 02 Apr, 2026 |
| Erik J Anderson | - | 0 | 1,008,759 | 07 Feb, 2023 |
| Derek Colby Johnson | Chief Operating Officer | 832,254 | 0 | 02 Jan, 2025 |
| David B Jansen | President | 0 | 795,495 | 13 Jul, 2022 |
| David B Jansen | President; Interim Ceo | 757,102 | 0 | 12 May, 2023 |
| Kevin A. Paprzycki | Cfo Treasurer | 738,364 | 0 | 13 May, 2024 |
| Erik J Anderson | - | 0 | 693,900 | 26 May, 2023 |
| James Liebscher | Chief Legal Officer Sec | 667,157 | 0 | 13 May, 2025 |
| Kaled Awada | - | 307,488 | 0 | 22 May, 2025 |
| Susan M Kreh | - | 307,488 | 0 | 22 May, 2025 |
| John Joseph Stephens | - | 0 | 300,005 | 14 Mar, 2023 |
| Aleksandra A Miziolek | - | 296,929 | 0 | 22 May, 2025 |
| Maryann Wright | - | 287,597 | 0 | 22 May, 2025 |
| John Joseph Stephens | - | 276,070 | 0 | 22 May, 2025 |
| Erik J Anderson | - | 260,370 | 0 | 22 May, 2025 |
| James Ac Mcdermott | - | 240,000 | 0 | 27 Oct, 2021 |
| Lesa B Roe | - | 239,049 | 0 | 30 May, 2025 |
| Erik J Anderson | - | 0 | 157,617 | 08 Dec, 2025 |
| Steven H Goldberg | - | 118,808 | 0 | 28 May, 2025 |
| Jon Eric Jacobs | Chief Marketing Officer | 45,728 | 0 | 13 May, 2022 |
| Jennifer Aaker | - | 40,000 | 0 | 10 Dec, 2021 |
| Jeffrey Tepper | - | 40,000 | 0 | 27 Oct, 2021 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 31 Mar, 2026 | Scoter John C. Van | Common Stock | D | 42,842 | $2.82 | 3,912,333 | D | F |
| 31 Mar, 2026 | Joshua Buettner-Garrett | Common Stock | D | 14,284 | $2.82 | 1,279,925 | D | F |
| 31 Mar, 2026 | Linda C. Heller | Common Stock | D | 26,659 | $2.82 | 1,776,928 | D | F |
| 01 Apr, 2026 | Joshua Buettner-Garrett | Common Stock | A | 183,518 | $0.00 | 1,463,443 | D | A |
| 01 Apr, 2026 | Scoter John C. Van | Common Stock | A | 1,267,828 | $0.00 | 5,180,161 | D | A |
| 01 Apr, 2026 | Linda C. Heller | Common Stock | A | 380,348 | $0.00 | 2,157,276 | D | A |
| 31 Dec, 2025 | Joshua Buettner-Garrett | Common Stock | D | 14,284 | $4.28 | 1,294,209 | D | F |
| 31 Dec, 2025 | Scoter John C. Van | Common Stock | D | 42,842 | $4.28 | 3,955,175 | D | F |
| 31 Dec, 2025 | Linda C. Heller | Common Stock | D | 26,605 | $4.28 | 1,803,587 | D | F |
| 04 Dec, 2025 | Erik J Anderson | Common Stock | D | 30,000 | $5.20 | 157,617 | I | S |
| 30 Sep, 2025 | Scoter John C. Van | Common Stock | D | 42,842 | $3.52 | 3,998,017 | D | F |
| 30 Sep, 2025 | Linda C. Heller | Common Stock | D | 26,605 | $3.52 | 1,830,192 | D | F |
| 30 Sep, 2025 | Joshua Buettner-Garrett | Common Stock | D | 14,284 | $3.52 | 1,308,493 | D | F |
| 30 Jun, 2025 | Joshua Buettner-Garrett | Common Stock | D | 14,285 | $2.15 | 1,322,777 | D | F |
| 30 Jun, 2025 | Scoter John C. Van | Common Stock | D | 42,841 | $2.15 | 4,040,859 | D | F |
| 30 Jun, 2025 | Linda C. Heller | Common Stock | D | 25,950 | $2.15 | 1,856,797 | D | F |
| 17 Jun, 2025 | Linda C. Heller | Common Stock | D | 103,800 | $1.93 | 1,882,747 | D | F |
| 29 May, 2025 | Lesa B Roe | Common Stock | D | 29,000 | $1.69 | 239,049 | D | S |
| 27 May, 2025 | Steven H Goldberg | Common Stock | D | 82,365 | $1.62 | 118,808 | D | S |
| 21 May, 2025 | Aleksandra A Miziolek | Common Stock | A | 118,808 | $0.00 | 296,929 | D | A |