MASTRANGELO JOE (Chief Executive Officer) sold 9.8% of their position (250K shares) of EOS ENERGY ENTERPRISES, INC. on the open market
Open‑market sale worth $980.0K — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.
S · 1 sale
Filed: 9/16/2026ACC: 0001628280-26-062270
DirectorOfficer· Chief Executive Officer
Since Nov 2020
-250K
Net shares
Net seller
$980.0K
Total sold
1
Open market trades
0B · 1S
3
Total transactions
500K acquired · 750K disposed
Non-Derivative Transactions2
Common Stock
Direct
Shares
+500K
Price / share
—
Trade value
—
% of position
24.3%
9/14/2026
2.06M→2.56M
Common Stock
Direct
Shares
−250K
Price / share
$3.92
Trade value
$980K
% of position
9.8%
9/16/2026
2.56M→2.31M
Total
Net shares
+250K
Net value
-$980K
| Security | Date | Type | Shares | Price / Share | Trade Value | % of Position | Held Before | Held After |
|---|---|---|---|---|---|---|---|---|
| Common Stock Direct | 9/14/2026 | A · Award | +500K | — | — | 24.3% | 2.06M | 2.56M |
| Common Stock Direct | 9/16/2026 | S · Sale | −250K | $3.92 | $980K | 9.8% | 2.56M | 2.31M |
| Total | +250K | -$980K | ||||||
Derivative Transactions1
Performance-Based Restricted Stock Units
Direct
Converts to
Common Stock
500K shares
Shares
−500K
Strike price
Held after
0.00
Exercisable
—
9/14/2026
| Security | Converts To | Date | Type | Shares | Strike Price | Exercisable | Held After |
|---|---|---|---|---|---|---|---|
| Performance-Based Restricted Stock Units Direct | Common Stock500K shares | 9/14/2026 | M · Option Exercise | −500K | — | 0.00 |