Joe Mastrangelo - 05 Jul 2025 Form 4 Insider Report for Eos Energy Enterprises, Inc. (EOSE)

Role
Chief Executive Officer, Director
Signature
/s/ Michael Silberman as attorney-in-fact for Joe Mastrangelo
Issuer symbol
EOSE
Transactions as of
05 Jul 2025
Net transactions value
-$625,588
Form type
4
Filing time
08 Jul 2025, 17:03:30 UTC
Previous filing
27 Jun 2025
Next filing
29 Jul 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Mastrangelo Joe Chief Executive Officer, Director C/O EOS ENERGY ENTERPRISES, INC., 3920 PARK AVENUE, EDISON /s/ Michael Silberman as attorney-in-fact for Joe Mastrangelo 08 Jul 2025 0001833309

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction EOSE Common Stock Options Exercise $0 +254,303 +23% $0.000000 1,363,712 05 Jul 2025 Direct F1
transaction EOSE Common Stock Sale $625,588 -127,152 -9.3% $4.92 1,236,560 08 Jul 2025 Direct F2, F3

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction EOSE Restricted Stock Units Options Exercise $0 -254,303 -50% $0.000000 254,304 05 Jul 2025 Common Stock 254,303 Direct F1, F4, F5
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Explanation of Responses:

Id Content
F1 Each restricted stock unit ("RSU") represents a contingent right to receive one share of common stock.
F2 The sales reported in this Form 4 were effected automatically pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 14, 2025 to cover estimated tax withholding obligations in connection with the vesting of restricted stock units.
F3 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $4.86 to $5.17, inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.
F4 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.
F5 Not applicable.