SLDP's three largest insider shareholders as of May 23, 2026 are Energy Technologies, Llc Volta (TenPercentOwner, 17.40Mn shares), Douglas M Campbell (Chief Executive Officer, 9.70Mn shares), Plus Acquisition Sponsor Iii Llc Decarbonization (TenPercentOwner, 8.39Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Erik J Anderson | - | 0 | 1,008,759 | 07 Feb, 2023 |
| David M Leuschen | - | 0 | 4,738,454 | 26 Jan, 2023 |
| John Joseph Stephens | - | 0 | 300,005 | 14 Mar, 2023 |
| Scoter John C. Van | President Ceo | 5,180,161 | 0 | 02 Apr, 2026 |
| James Ac Mcdermott | - | 240,000 | 0 | 27 Oct, 2021 |
| Maryann Wright | - | 287,597 | 0 | 22 May, 2025 |
| Susan M Kreh | - | 307,488 | 0 | 22 May, 2025 |
| Linda C. Heller | Cfo, Treasurer, Secretary | 2,157,276 | 0 | 02 Apr, 2026 |
| Aleksandra A Miziolek | - | 296,929 | 0 | 22 May, 2025 |
| Jeffrey Tepper | - | 40,000 | 0 | 27 Oct, 2021 |
| Kevin A. Paprzycki | Cfo Treasurer | 738,364 | 0 | 13 May, 2024 |
| Kaled Awada | - | 307,488 | 0 | 22 May, 2025 |
| Jennifer Aaker | - | 40,000 | 0 | 10 Dec, 2021 |
| Plus Acquisition Sponsor Iii Llc Decarbonization | - | 0 | 8,390,000 | 27 Oct, 2021 |
| Douglas M Campbell | Chief Executive Officer | 9,700,214 | 0 | 31 Aug, 2022 |
| Steven H Goldberg | - | 118,808 | 0 | 28 May, 2025 |
| Joshua Buettner-Garrett | Chief Technology Officer | 1,463,443 | 0 | 02 Apr, 2026 |
| Derek Colby Johnson | Chief Operating Officer | 832,254 | 0 | 02 Jan, 2025 |
| David B Jansen | President | 0 | 795,495 | 13 Jul, 2022 |
| Jon Eric Jacobs | Chief Marketing Officer | 45,728 | 0 | 13 May, 2022 |
| James Liebscher | Chief Legal Officer Sec | 667,157 | 0 | 13 May, 2025 |
| Energy Technologies, Llc Volta | - | 0 | 17,399,807 | 27 Jun, 2022 |
| Lesa B Roe | - | 239,049 | 0 | 30 May, 2025 |
* 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 | Linda C. Heller | Common Stock | D | 26,659 | $2.82 | 1,776,928 | D | F |
| 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 |
| 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 |
| 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 |
| 31 Dec, 2025 | Joshua Buettner-Garrett | Common Stock | D | 14,284 | $4.28 | 1,294,209 | D | F |
| 31 Dec, 2025 | Linda C. Heller | Common Stock | D | 26,605 | $4.28 | 1,803,587 | D | F |
| 31 Dec, 2025 | Scoter John C. Van | Common Stock | D | 42,842 | $4.28 | 3,955,175 | D | F |
| 31 Dec, 2025 | Scoter John C. Van | Common Stock | D | 42,842 | $4.28 | 3,955,175 | 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 | Joshua Buettner-Garrett | Common Stock | D | 14,284 | $3.52 | 1,308,493 | D | F |
| 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 Jun, 2025 | Scoter John C. Van | Common Stock | D | 42,841 | $2.15 | 4,040,859 | D | F |
| 30 Jun, 2025 | Scoter John C. Van | Common Stock | D | 42,841 | $2.15 | 4,040,859 | D | F |
| 30 Jun, 2025 | Joshua Buettner-Garrett | Common Stock | D | 14,285 | $2.15 | 1,322,777 | D | F |