As of March 23, 2026, the three largest insider holders of EOSE are Riley Financial, Inc. B. (TenPercentOwner, 5.77Mn shares), Russell Monoki Stidolph (Director, 2.41Mn shares), Joe Mastrangelo (Chief Executive Officer, 1.49Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Riley Financial, Inc. B. | 0 | 5,765,942 | 18 Oct, 2021 | |
| Russell Monoki Stidolph | 364,355 | 2,048,273 | 08 Dec, 2025 | |
| Joe Mastrangelo | Chief Executive Officer | 1,487,126 | 0 | 05 Mar, 2026 |
| Nathan Kroeker | Cco And Interim Cfo | 662,512 | 0 | 26 Jan, 2026 |
| Michael W Silberman | Chief Legal Officer | 283,279 | 0 | 23 Jan, 2026 |
| Alexander Dimitrief | 235,221 | 0 | 04 Mar, 2026 | |
| Randall B Gonzales | Chief Financial Officer | 188,094 | 0 | 13 Jan, 2023 |
| Melissa Berube | General Counsel | 171,836 | 0 | 30 Jan, 2024 |
| Sumeet Puri | Chief Accounting Officer | 164,290 | 0 | 08 Sep, 2025 |
| Claude Demby | 141,708 | 0 | 16 May, 2025 | |
| Marian Walters | 135,334 | 0 | 08 Dec, 2025 | |
| Jeffrey S Bornstein | 115,759 | 0 | 08 Dec, 2025 | |
| Audrey Ann Zibelman | 104,897 | 0 | 02 May, 2024 | |
| Jeff Mcneil | 99,179 | 0 | 08 Dec, 2025 | |
| Sagar Kurada | Chief Financial Officer | 66,939 | 0 | 05 Jan, 2022 |
| David Urban | 62,471 | 0 | 10 Mar, 2026 | |
| Joseph Nigro | 35,385 | 0 | 16 May, 2025 | |
| Daniel Shribman | 33,960 | 0 | 10 Nov, 2022 | |
| John J Tedone | Chief Accounting Officer | 25,487 | 0 | 16 Feb, 2023 |
| Alexander Dimitrief | 0 | 10,000 | 12 Mar, 2024 | |
| Marian Walters | 0 | 5,000 | 07 Mar, 2022 | |
| Riley Financial, Inc. B. | 1,769 | 0 | 21 Sep, 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 |
|---|---|---|---|---|---|---|---|---|
| 09 Mar, 2026 | David Urban | Common Stock | A | 16,250 | $6.16 | 62,471 | D | P |
| 04 Mar, 2026 | Joe Mastrangelo | Common Stock | A | 23,900 | $6.58 | 1,487,126 | D | P |
| 02 Mar, 2026 | Alexander Dimitrief | Common Stock | A | 15,000 | $6.04 | 235,221 | D | P |
| 02 Mar, 2026 | Joe Mastrangelo | Common Stock | A | 60,000 | $5.75 | 1,463,226 | D | P |
| 23 Jan, 2026 | Nathan Kroeker | Common Stock | A | 100,000 | $0.00 | 712,512 | D | M |
| 26 Jan, 2026 | Nathan Kroeker | Common Stock | D | 50,000 | $16.04 | 662,512 | D | S |
| 23 Jan, 2026 | Nathan Kroeker | Restricted Stock Units | D | 100,000 | $0.00 | 0 | D | M |
| 22 Jan, 2026 | Michael W Silberman | Common Stock | A | 83,334 | $0.00 | 324,946 | D | M |
| 23 Jan, 2026 | Michael W Silberman | Common Stock | D | 41,667 | $17.74 | 283,279 | D | S |
| 22 Jan, 2026 | Michael W Silberman | Restricted Stock Units | D | 83,334 | $0.00 | 83,333 | D | M |
| 22 Dec, 2025 | Joseph Nigro | Restricted Stock Units | A | 3,565 | $0.00 | 3,565 | D | A |
| 22 Dec, 2025 | Marian Walters | Restricted Stock Units | A | 1,782 | $0.00 | 1,782 | D | A |
| 04 Dec, 2025 | Jeff Mcneil | Common Stock | D | 16,000 | $0.00 | 99,179 | D | G |
| 05 Dec, 2025 | Alexander Dimitrief | Common Stock | A | 18,473 | $14.43 | 237,925 | D | M |
| 04 Dec, 2025 | Marian Walters | Common Stock | A | 18,473 | $14.43 | 152,267 | D | M |
| 05 Dec, 2025 | Jeffrey S Bornstein | Common Stock | D | 32,328 | $15.05 | 115,759 | D | S |
| 05 Dec, 2025 | Russell Monoki Stidolph | Common Stock | D | 500,000 | $14.99 | 2,153,272 | I | S |
| 04 Dec, 2025 | Jeffrey S Bornstein | Common Stock | D | 8,000 | $15.75 | 0 | I | S |
| 04 Dec, 2025 | Marian Walters | Common Stock | D | 16,933 | $15.75 | 135,334 | D | F |
| 05 Dec, 2025 | Alexander Dimitrief | Common Stock | D | 17,704 | $15.03 | 220,221 | D | F |