Michelle Buczkowski - 02 Dec 2025 Form 4 Insider Report for Eos Energy Enterprises, Inc. (EOSE)

Role: Chief Administration Officer
Signature: /s/ Michael Silberman as attorney-in-fact for Michelle Buczkowski
Issuer symbol: EOSE
Transactions as of: 02 Dec 2025
Net transactions value: $0
Form type: 4
Filing time: 04 Dec 2025, 17:28:57 UTC
Previous filing: 13 Nov 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Buczkowski Michelle	Chief Administration Officer	C/O EOS ENERGY ENTERPRISES, INC., 3920 PARK AVENUE, EDISON	/s/ Michael Silberman as attorney-in-fact for Michelle Buczkowski	04 Dec 2025	0002096705

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	Award	$0	+234,742		$0.000000	234,742	02 Dec 2025	Common Stock	234,742		Direct	F1, F2, F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Each restricted stock unit ("RSU") represents a contingent right to receive one share of common stock.
F2	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.
F3	Not applicable.