Joe Mastrangelo - 16 May 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: 16 May 2025
Net transactions value: -$1,854,834
Form type: 4
Filing time: 16 May 2025, 18:16:01 UTC
Previous filing: 12 May 2025
Next filing: 27 Jun 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	16 May 2025	0001833309

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	EOSE	Common Stock	Sale	$1,854,834	-270,384	-20%	$6.86	1,109,409	16 May 2025	Direct	F1, F2

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

Explanation of Responses:

Id	Content
F1	The sales reported on this Form 4 represent the number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of performance-based restricted stock units. The Issuer has adopted a "sell-to-cover" policy to satisfy the tax withholding obligations of the Reporting Person. Such sales were automatic and not at the discretion of the Reporting Person.
F2	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.73 to $7.10, inclusive.

Content

The sales reported on this Form 4 represent the number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of performance-based restricted stock units. The Issuer has adopted a "sell-to-cover" policy to satisfy the tax withholding obligations of the Reporting Person. Such sales were automatic and not at the discretion of the Reporting Person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.73 to $7.10, inclusive.