Joe Mastrangelo - 02 Mar 2026 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: 02 Mar 2026
Net transactions value: +$345,000
Form type: 4
Filing time: 03 Mar 2026, 09:00:50 UTC
Previous filing: 29 Jul 2025
Next filing: 05 Mar 2026
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	03 Mar 2026	0001833309

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	EOSE	Common Stock	Purchase	$345,000	+60,000	+4.3%	$5.75	1,463,226	02 Mar 2026	Direct	F1

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

Explanation of Responses:

Id	Content
F1	The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.74 to $5.75, inclusive. The Reporting Person undertakes to provide to 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 purchased at each separate price within the range set forth in this footnote.

Content

The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.74 to $5.75, inclusive. The Reporting Person undertakes to provide to 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 purchased at each separate price within the range set forth in this footnote.