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sellWeak cluster of 210b5-1 plan

Joe Mastrangelo sold $980k of EOSE

Chief Executive Officer at Eos Energy Enterprises, Inc.. 250,000 shares at an average of $3.92, traded Sep 16, 2026, filed Sep 16, 2026.

Warning score
23
Value
$980k
250,000 shares
Holdings after
2,308,704
-10% from before
From 52-week low
-
no price yet
From 52-week high
-
no price yet

Score components

  • Role
    CEO
    +25
  • Trade size
    $980k at market
    +25
  • Share of holdings sold
    Sold 9.8% of holdings
    0
  • Cluster
    2 insiders selling within 14 days
    +8
  • Exercise and sell
    Shares came from an option exercise in the same filing
    -15
  • 10b5-1 plan
    Pre-scheduled under a 10b5-1 plan
    -20

What happened after comparable sells

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.

EOSEOct 9, 2026 · close 2.52
Since filing Sep 16, 2026: -36.0%SPY +3.4% · excess -39.4%

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 0001628280-26-062270, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Sep 14, 2026AGrant or award
Common Stock10b5-1
+500,000$0.00$02,558,70427 d ago
Sep 16, 2026SOpen-market sale
Common Stock10b5-1
-250,000$3.92$980k2,308,70427 d ago
Sep 14, 2026MOption exercise
Performance-Based Restricted Stock Unitsderivative10b5-1
-500,000$0.00$0027 d ago

Related signals

Other insiders at Eos Energy Enterprises, Inc. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
4Weak
EOSEsell 210b5-1
Eos Energy Enterprises, Inc.
Sumeet Puri
Chief Accounting Officer
$172k
43,750 shares
-14%
30Weak
EOSEbuy
Eos Energy Enterprises, Inc.
Haiyan Song
director
$59k
15,000 shares
-
4Weak
EOSEsell 210b5-1
Eos Energy Enterprises, Inc.
Sumeet Puri
Chief Accounting Officer
$141k
34,167 shares
-13%
44Moderate
EOSEsell 3
Eos Energy Enterprises, Inc.
Joe Mastrangelo
Chief Executive Officer
$575k
159,154 shares
-8%
15Weak
EOSEsell 310b5-1
Eos Energy Enterprises, Inc.
Nathan Kroeker
Chief Commercial Officer
$371k
110,417 shares
-11%
10Weak
EOSEsell 310b5-1
Eos Energy Enterprises, Inc.
Sumeet Puri
Chief Accounting Officer
$98k
29,167 shares
-13%
17Weak
EOSEsell 410b5-1
Eos Energy Enterprises, Inc.
Nathan Kroeker
CCO and Interim CFO
$371k
79,309 shares
-9%
8Weak
EOSEsell 410b5-1
Eos Energy Enterprises, Inc.
Michelle Buczkowski
Chief Administration Officer
$67k
11,469 shares
-16%
14Weak
EOSEsell 410b5-1
Eos Energy Enterprises, Inc.
Nathan Kroeker
CCO and Interim CFO
$207k
35,289 shares
-5%
4Weak
EOSEsell 410b5-1
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.

Joe Mastrangelo sold $980k of EOSE | InsiderTell