Eos Energy Enterprises, Inc.
A maker of long-duration energy storage systems, Eos builds big zinc-based batteries that utilities and industrial customers use to store power on the grid. Founded in 2008, its battery line carries the name Znyth, a mashup of the element symbol for zinc (Zn) and the word "zenith," or highest point. Its batteries are water-based and non-flammable, made from abundant, recyclable materials, and built in the United States.
Granted 330.6K · Bought 83.9K
Granted 70.6K · Sold 35.3K
Granted 23.1K
Granted 30.0K · Sold 15.0K
Granted 27.0K · Bought 15.0K
Granted 30.8K
Granted 17.6K · Sold 8.8K
Granted 84.9K · Sold 60.0K
Granted 23.1K
Granted 23.1K · Bought 16.3K
Granted 22.9K · Sold 11.5K
Granted 3.6K
Granted 23.1K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Mastrangelo JoeChief Executive Officer, Director · 6 transactions | +16.9% | 1.64M | 330.6K | 83.9K | — |
| Kroeker NathanCCO and Interim CFO · 2 transactions | +5.3% | 697.8K | 70.6K | — | 35.3K |
| McNeil JeffDirector · 1 transaction | +4.2% | 576.8K | 23.1K | — | — |
| Silberman Michael WChief Legal Officer · 2 transactions | +5.3% | 298.3K | 30.0K | — | 15.0K |
| Dimitrief AlexanderDirector · 3 transactions | +9.8% | 272.2K | 27.0K | 15.0K | — |
| Bornstein Jeffrey SDirector · 2 transactions | -14.2% | 263.8K | 30.8K | — | — |
| Puri SumeetChief Accounting Officer · 2 transactions | -6.1% | 173.1K | 17.6K | — | 8.8K |
| Walters MarianDirector · 8 transactions | +17.1% | 170.2K | 84.9K | — | 60.0K |
| Demby ClaudeDirector · 2 transactions | +16.3% | 164.8K | 23.1K | — | — |
| Urban DavidDirector · 2 transactions | +85.2% | 85.6K | 23.1K | 16.3K | — |
| Buczkowski MichelleChief Administration Officer · 2 transactions | +24% | 59.2K | 22.9K | — | 11.5K |
| Nigro JosephDirector · 1 transaction | +10.1% | 39.0K | 3.6K | — | — |
| Nixon Gregory S.Director · 2 transactions | — | 23.1K | 23.1K | — | — |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over the last 6 months: -15.4K shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.