Marian Walters - 22 Dec 2025 Form 4 Insider Report for Eos Energy Enterprises, Inc. (EOSE)

Role: Director
Signature: /s/ Michael Silberman as attorney-in-fact for Marian Walters
Issuer symbol: EOSE
Transactions as of: 22 Dec 2025
Net transactions value: $0
Form type: 4
Filing time: 23 Dec 2025, 16:04:53 UTC
Previous filing: 08 Dec 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Walters Marian	Director	C/O EOS ENERGY ENTERPRISES, INC., 3920 PARK AVENUE, EDISON	/s/ Michael Silberman as attorney-in-fact for Marian Walters	23 Dec 2025	0001782905

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	+1,782		$0.000000	1,782	22 Dec 2025	Common Stock	1,782		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 was granted RSUs that settle in common stock, which will vest on the earlier of (i) the first anniversary of the grant date or (ii) immediately prior to the date of the next annual shareholders meeting of the Company following the grant date.
F3	Not applicable.