Haiyan Song bought $59k of EOSE
director at Eos Energy Enterprises, Inc.. 15,000 shares at an average of $3.91, traded Sep 11, 2026, filed Sep 15, 2026.
Score components
- +15RoleDirector
- +7Trade size$59k at market
- +8Relative to holdingsFirst purchase: no shares before this trade
- 0Price contextNo price history yet
- 0ClusterNo other insider buying within 14 days
- 0Repeat buyingFirst buy in 90 days
- 0Track recordToo few past buys to judge (0 with prices)
What happened after comparable buys
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0001628280-26-061975, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Sep 11, 2026 | POpen-market purchase Common Stock | +10,000 | $3.95 | $40k | 10,000 | 28 d ago |
| Sep 14, 2026 | POpen-market purchase Common Stock | +5,000 | $3.84 | $19k | 15,000 | 28 d ago |
Related signals
Other insiders at Eos Energy Enterprises, Inc. and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 23Weak | Eos Energy Enterprises, Inc. | Joe Mastrangelo Chief Executive Officer | $980k 250,000 shares | -10% | |
| 4Weak | Eos Energy Enterprises, Inc. | Sumeet Puri Chief Accounting Officer | $172k 43,750 shares | -14% | |
| 4Weak | Eos Energy Enterprises, Inc. | Sumeet Puri Chief Accounting Officer | $141k 34,167 shares | -13% | |
| 44Moderate | Eos Energy Enterprises, Inc. | Joe Mastrangelo Chief Executive Officer | $575k 159,154 shares | -8% | |
| 15Weak | Eos Energy Enterprises, Inc. | Nathan Kroeker Chief Commercial Officer | $371k 110,417 shares | -11% | |
| 10Weak | Eos Energy Enterprises, Inc. | Sumeet Puri Chief Accounting Officer | $98k 29,167 shares | -13% | |
| 17Weak | Eos Energy Enterprises, Inc. | Nathan Kroeker CCO and Interim CFO | $371k 79,309 shares | -9% | |
| 8Weak | Eos Energy Enterprises, Inc. | Michelle Buczkowski Chief Administration Officer | $67k 11,469 shares | -16% | |
| 14Weak | Eos Energy Enterprises, Inc. | Nathan Kroeker CCO and Interim CFO | $207k 35,289 shares | -5% | |
| 4Weak | Eos Energy Enterprises, Inc. | Michael W Silberman Chief Legal Officer | $88k 14,998 shares | -5% |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.