Eos Energy Enterprises, Inc. (EOSE) insider trading
Eos Energy Enterprises, Inc. insiders have made 1 open-market purchase worth $59k since Sep 15, 2026, by 1 insider. The latest: Haiyan Song (Director) bought $59k, filed Sep 15, 2026, scored 40 out of 100.
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Insider purchases
| Filed | Insider | Stake | Score | Bought | 1 week | 1 month |
|---|---|---|---|---|---|---|
| Sep 15 Form 4 (opens sec.gov) |
Haiyan SongDirectorDirector · Near 52-week low | New position | 40 | $59k 15,000 at $3.91 |
−0.2% | −46.9% |
Track record (hypothetical): a week after the filing, these buys averaged −0.2% (0% up, 1 measured); a month after, −46.9% (0% up, 1 measured).
Insider sales
3 open-market sales on record
| Filed | Insider | Sold |
|---|---|---|
| Oct 29 Form 4 (opens sec.gov) |
Michelle BuczkowskiChief Commercial Officer · planned (10b5-1) · option shares | $100k 50,000 at $2.00 |
| Sep 16 Form 4 (opens sec.gov) |
Sumeet PuriChief Accounting Officer · planned (10b5-1) · option shares | $172k 43,750 at $3.92 |
| Sep 16 Form 4 (opens sec.gov) |
Joe MastrangeloCEO · planned (10b5-1) | $980k 250,000 at $3.92 · 10% of holdings |
Most insider sales are planned in advance or made for personal reasons, so a sale says less than a buy.
Planned insider sales of EOSE (Form 144)
| Filed | Insider | To sell |
|---|---|---|
| Oct 29 Form 144 | Nathan KroekerFormer Officer · no trading plan named | $290k 147,208 shares from Oct 29 |
| Oct 29 Form 144 | Buczkowski MichelleOfficer · 10b5-1 plan | $95k 50,000 shares from Oct 29 |
A Form 144 is filed before an insider sells restricted or control shares; the Form 4 reports the sale once made.
Insiders who bought EOSE
- Haiyan Song Director
Questions
Are insiders buying EOSE stock?
Yes. In the last 90 days, 1 open-market purchase was filed, worth $59k, against $1.3M of open-market sales.
Who bought EOSE stock most recently?
Haiyan Song, Director, bought 15,000 shares for $59k (Form 4 (opens sec.gov), filed Sep 15, 2026).
How does InsiderBeacon score an insider buy?
Out of 100, from who bought, how much their stake grew, the size of the trade, whether other insiders bought within ten days, where the price sat in its 52-week range, and whether it was a first or a routine buy. The score is fixed when the filing arrives. The formula and the research behind it.
Insiders are also buying, same industry
Data as of Oct 29, 2026, from SEC EDGAR Form 4 filings: open-market purchases (code P) of $25,000 or more, and open-market sales. Every row links to its filing. Scores summarise what a filing says (how the score works); outcomes are hypothetical, from the first close after the filing, and past results don't predict future ones. Disclaimer