InsiderTrades

Form 4 for EOSE Eos Energy Enterprises, Inc.

Accepted 2026-06-30 17:05:17 ET · period of report 2026-06-26 · accession 0001628280-26-046285 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X Filed Traded Ticker Insider Title Type Price Qty Owned ΔOwn Value
D 2026-06-30 17:05 2026-06-26 EOSE Mastrangelo Joe CEO, Dir M - OptEx $0.00 +130.6K 1.70M +8% $0
D 2026-06-30 17:05 2026-06-30 EOSE Mastrangelo Joe CEO, Dir F - Tax $6.09 -60.7K 1.64M -4% -$369.7K
D 2026-06-30 17:05 2026-06-26 EOSE Mastrangelo Joe CEO, Dir M - OptEx $0.00 -130.6K 261.1K -33% $0

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#TableSecurityDateCodeA/DSharesPriceOwned afterOwnExercise / expiryUnderlyingFootnotes
1 Common Common Stock 2026-06-26 M A 130,570 $0.00 1,701,050 D — — (F1) Each restricted stock unit ("RSU") represents a contingent right to receive one share of common stock.
2 Common Common Stock 2026-06-30 F D 60,703 $6.09 1,640,347 D — — (F2) Represents shares withheld from vested restricted stock unit ("RSU") award to satisfy tax obligations, as permitted by the Company's Amended and Restated 2020 Incentive Plan.
3 Derivative Restricted Stock Units 2026-06-26 M D 130,570 $0.00 261,140 D — · — to — 130,570 Common Stock (F3) The reporting person received a grant of RSUs under the Issuer's 2020 Incentive Plan, which will vest in three equal installments on each of the first three anniversaries of the grant date, subject to continued service through each vesting date. (F1) Each restricted stock unit ("RSU") represents a contingent right to receive one share of common stock. (F4) Not applicable. (F4) Not applicable.