Form 4 for EOSE Eos Energy Enterprises, Inc.
Accepted 2025-12-08 00:00:00 ET · period of report 2025-12-05 · accession 0001628280-25-055938 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DMI | 2025-12-08 | 2025-12-05+ | EOSE | Stidolph Russell Monoki | Dir | S - Sale+OE | $15.01 | -530.0K | 2.12M | -20% | -$7.96M |
| DI | 2025-12-08 | 2025-12-05 | EOSE | Stidolph Russell Monoki | Dir | J - Other | $0.00 | -75.0K | 2.05M | -4% | $0 |
| D | 2025-12-08 | 2025-12-05 | EOSE | Stidolph Russell Monoki | Dir | J - Other | $0.00 | +75.0K | 439.4K | +21% | $0 |
| DM | 2025-12-08 | 2025-12-05 | EOSE | Stidolph Russell Monoki | Dir | G - Gift | $0.00 | -75.0K | 364.4K | -17% | $0 |
| DM | 2025-12-08 | 2025-12-08 | EOSE | Stidolph Russell Monoki | Dir | S - Sale+OE | $14.89 | -236.1K | 364.4K | -39% | -$3.52M |
| DM | 2025-12-08 | 2025-12-08 | EOSE | Stidolph Russell Monoki | Dir | F - Tax | $14.85 | -60.3K | 599.7K | -9% | -$895.2K |
| DM | 2025-12-08 | 2025-12-08 | EOSE | Stidolph Russell Monoki | Dir | M - OptEx | $3.02 | +296.4K | 395.1K | +300% | +$895.3K |
| DM | 2025-12-08 | 2025-12-08 | EOSE | Stidolph Russell Monoki | Dir | M - OptEx | $0.00 | -296.4K | 0 | -100% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2025-12-05 | S | D | 500,000 | $14.99 | 2,153,272 | I See footnote | — | — | (F1) The shares reported in this Form 4 are shares of common stock in which Mr. Stidolph has a pecuniary interest in that are held directly by AltEnergy, LLC or AltEnergy Transmission, LLC. Mr. Stidolph is the managing director of AltEnergy, LLC and the managing member of AltEnergy Transmission, LLC and has voting and dispositive power with respect to the securities owned by AltEnergy, LLC and AltEnergy Transmission, LLC. Each of the Filing Persons disclaims beneficial ownership of the outstanding shares of common stock of the issuer reported herein except to the extent of its pecuniary interest therein. |
| 2 | Common | Common Stock | 2025-12-08 | S | D | 29,999 | $15.36 | 2,123,273 | I See footnote | — | — | (F2) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.28 to $15.45, inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above. (F1) The shares reported in this Form 4 are shares of common stock in which Mr. Stidolph has a pecuniary interest in that are held directly by AltEnergy, LLC or AltEnergy Transmission, LLC. Mr. Stidolph is the managing director of AltEnergy, LLC and the managing member of AltEnergy Transmission, LLC and has voting and dispositive power with respect to the securities owned by AltEnergy, LLC and AltEnergy Transmission, LLC. Each of the Filing Persons disclaims beneficial ownership of the outstanding shares of common stock of the issuer reported herein except to the extent of its pecuniary interest therein. |
| 3 | Common | Common Stock | 2025-12-05 | J | D | 75,000 | $0.00 | 2,048,273 | I See footnote | — | — | (F1) The shares reported in this Form 4 are shares of common stock in which Mr. Stidolph has a pecuniary interest in that are held directly by AltEnergy, LLC or AltEnergy Transmission, LLC. Mr. Stidolph is the managing director of AltEnergy, LLC and the managing member of AltEnergy Transmission, LLC and has voting and dispositive power with respect to the securities owned by AltEnergy, LLC and AltEnergy Transmission, LLC. Each of the Filing Persons disclaims beneficial ownership of the outstanding shares of common stock of the issuer reported herein except to the extent of its pecuniary interest therein. |
| 4 | Common | Common Stock | 2025-12-05 | J | A | 75,000 | $0.00 | 439,355 | D | — | — | |
| 5 | Common | Common Stock | 2025-12-05 | G | D | 60,000 | $0.00 | 379,355 | D | — | — | (F4) Represents a charitable donation by the reporting person. |
| 6 | Common | Common Stock | 2025-12-05 | G | D | 15,000 | $0.00 | 364,355 | D | — | — | (F5) Reflects the donation of common stock to a charitable donor advised fund. |
| 7 | Common | Common Stock | 2025-12-08 | S | D | 235,367 | $14.89 | 364,355 | D | — | — | (F6) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions pursuant to a Cashless exercise / same-day sale at prices ranging from $14.68 to $15.16, inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above. |
| 8 | Common | Common Stock | 2025-12-08 | F | D | 30,020 | $14.80 | 365,123 | D | — | — | |
| 9 | Common | Common Stock | 2025-12-08 | S | D | 768 | $14.80 | 364,355 | D | — | — | |
| 10 | Common | Common Stock | 2025-12-08 | M | A | 145,018 | $1.18 | 509,373 | D | — | — | |
| 11 | Common | Common Stock | 2025-12-08 | M | A | 120,633 | $2.32 | 630,006 | D | — | — | |
| 12 | Common | Common Stock | 2025-12-08 | F | D | 18,793 | $14.89 | 611,213 | D | — | — | (F6) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions pursuant to a Cashless exercise / same-day sale at prices ranging from $14.68 to $15.16, inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above. |
| 13 | Common | Common Stock | 2025-12-08 | F | D | 11,491 | $14.89 | 599,722 | D | — | — | (F6) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions pursuant to a Cashless exercise / same-day sale at prices ranging from $14.68 to $15.16, inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above. |
| 14 | Common | Common Stock | 2025-12-08 | M | A | 30,788 | $14.43 | 395,143 | D | — | — | |
| 15 | Derivative | Stock Option (Right to Buy) | 2025-12-08 | M | D | 120,633 | $0.00 | 0 | D | $2.32 · — to 2028-05-18 | 120,633 Common Stock | (F9) On May 18, 2023 the reporting person was granted stock options to purchase 120,633 shares of common stock which vested on April 30, 2024. |
| 16 | Derivative | Stock Option (Right to Buy) | 2025-12-08 | M | D | 145,018 | $0.00 | 0 | D | $1.18 · — to 2027-05-19 | 145,018 Common Stock | (F8) On May 19, 2022 the reporting person was granted stock options to purchase 145,018 shares of common stock which vested on May 19, 2023. |
| 17 | Derivative | Stock Option (Right to Buy) | 2025-12-08 | M | D | 30,788 | $0.00 | 0 | D | $14.43 · — to 2025-12-08 | 30,788 Common Stock | (F7) On December 8, 2020 the reporting person was granted stock options to purchase 30,788 shares of common stock which vested on June 15, 2021. |