GWH's three largest insider shareholders as of April 29, 2026 are Group Corp Softbank (Director, 35.95Mn shares), Energy Ventures, Llc Breakthrough (TenPercentOwner, 18.56Mn shares), S2 Sponsor, L.L.C. Acon (TenPercentOwner, 6.10Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Group Corp Softbank | - | 0 | 35,953,699 | 12 Nov, 2021 |
| Energy Ventures, Llc Breakthrough | - | 18,558,721 | 0 | 12 Nov, 2021 |
| S2 Sponsor, L.L.C. Acon | - | 6,100,000 | 0 | 13 Oct, 2021 |
| Craig E Evans | President | 5,561,524 | 0 | 23 Feb, 2023 |
| Craig E Evans | President | 0 | 2,859,868 | 14 Mar, 2023 |
| Craig E Evans | President | 0 | 2,466,067 | 09 Feb, 2022 |
| Michael R Niggli | - | 0 | 568,302 | 17 Nov, 2021 |
| Amir Moftakhar | Chief Financial Officer | 558,850 | 0 | 20 Oct, 2022 |
| Jigish Dhirajlal Trivedi | Coo | 275,000 | 0 | 05 Sep, 2025 |
| Kelly F. Goodman | Interim Ceo | 215,853 | 0 | 26 Feb, 2026 |
| Eric P. Dresselhuys | Chief Executive Officer | 180,580 | 0 | 18 Nov, 2024 |
| Kate Eileen Suhadolnik | Chief Financial Officer | 164,414 | 0 | 26 Feb, 2026 |
| Anthony Rabb | Chief Financial Officer | 109,392 | 0 | 22 May, 2025 |
| Michael R Niggli | - | 90,825 | 0 | 15 Oct, 2025 |
| Daryl C Wilson | - | 75,850 | 0 | 02 Jun, 2022 |
| Claudia Gast | - | 59,694 | 0 | 02 Jun, 2022 |
| Jeff Bodner | Chief Accounting Officer | 54,900 | 0 | 09 Feb, 2022 |
| Sarah Kirshbaum Levy | - | 50,000 | 0 | 13 Oct, 2021 |
| Ryan D Shadrick-Wilson | - | 50,000 | 0 | 12 Oct, 2021 |
| Janie Goddard | - | 50,000 | 0 | 13 Oct, 2021 |
| Raffi Garabedian | - | 39,672 | 0 | 15 Oct, 2025 |
| Alexi Wellman | - | 38,886 | 0 | 15 Oct, 2025 |
| Kyle Teamey | - | 38,740 | 0 | 15 Oct, 2025 |
| Sandeep Nijhawan | - | 29,050 | 0 | 15 Oct, 2025 |
| Rich Hossfeld | - | 27,859 | 0 | 15 Oct, 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 |
|---|---|---|---|---|---|---|---|---|
| 13 Feb, 2026 | Kate Eileen Suhadolnik | Common Stock | A | 137,500 | $0.00 | 165,155 | D | A |
| 20 Feb, 2026 | Kelly F. Goodman | Common Stock | D | 2,269 | $1.54 | 215,853 | D | S |
| 13 Feb, 2026 | Kelly F. Goodman | Common Stock | A | 137,500 | $0.00 | 218,122 | D | A |
| 20 Feb, 2026 | Kate Eileen Suhadolnik | Common Stock | D | 741 | $1.54 | 164,414 | D | S |
| 13 Feb, 2026 | Kelly F. Goodman | Stock Option (right to buy) | A | 137,500 | $0.00 | 137,500 | D | A |
| 13 Feb, 2026 | Kate Eileen Suhadolnik | Stock Option (right to buy) | A | 137,500 | $0.00 | 137,500 | D | A |
| 28 Jan, 2026 | Drew P Buckley | Stock Option (right to buy) | A | 550,000 | $0.00 | 550,000 | D | A |
| 20 Nov, 2025 | Kelly F. Goodman | Common Stock | D | 4,513 | $2.40 | 80,622 | D | F |
| 20 Nov, 2025 | Kate Eileen Suhadolnik | Common Stock | D | 1,299 | $2.40 | 27,655 | D | F |
| 13 Oct, 2025 | Raffi Garabedian | Common Stock | A | 13,513 | $0.00 | 39,672 | D | A |
| 13 Oct, 2025 | Sandeep Nijhawan | Common Stock | A | 13,513 | $0.00 | 29,050 | D | A |
| 13 Oct, 2025 | Michael R Niggli | Common Stock | A | 13,513 | $0.00 | 90,825 | D | A |
| 13 Oct, 2025 | Rich Hossfeld | Common Stock | A | 13,513 | $0.00 | 27,859 | D | A |
| 13 Oct, 2025 | Kyle Teamey | Common Stock | A | 13,513 | $0.00 | 38,740 | D | A |
| 13 Oct, 2025 | Alexi Wellman | Common Stock | A | 13,513 | $0.00 | 38,886 | D | A |
| 18 Aug, 2025 | Jigish Dhirajlal Trivedi | Common Stock | A | 275,000 | $0.00 | 275,000 | D | A |
| 20 Aug, 2025 | Kate Eileen Suhadolnik | Common Stock | D | 1,232 | $1.61 | 28,954 | D | F |
| 20 Aug, 2025 | Kelly F. Goodman | Common Stock | D | 4,326 | $1.61 | 85,135 | D | F |
| 20 May, 2025 | Anthony Rabb | Common Stock | D | 2,741 | $1.96 | 109,392 | D | F |
| 20 May, 2025 | Kelly F. Goodman | Common Stock | D | 2,164 | $1.96 | 89,461 | D | F |