Marian Walters - 21 Jul 2026 Form 4 Insider Report for Eos Energy Enterprises, Inc. (EOSE)

Reporting relationship: Director
Issuer ticker: EOSE
Reported as of: 21 Jul 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 06 Aug 2026, 08:11:39 UTC
Prior SEC filing: 09 Jun 2026
Next SEC filing: 27 Jul 2026
Source filing: View source filing
Reporting owner signature: /s/ Sumeet Puri as attorney-in-fact for Marian Walters

Key filing fact

Marian Walters filed Form 4 for Eos Energy Enterprises, Inc. (EOSE) on 06 Aug 2026.

Key facts

This page summarizes Marian Walters's Form 4 filing for Eos Energy Enterprises, Inc. (EOSE).
3 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 06 Aug 2026, 08:11.

Change

Previous filing in this sequence was filed on 09 Jun 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001782905 Primary reporting owner

Walters Marian

Relationship: Director
Address: C/O EOS ENERGY ENTERPRISES, INC., TWO ALLEGHENY CENTER, NOVA TOWER 2, PITTSBURGH
Signature: /s/ Sumeet Puri as attorney-in-fact for Marian Walters
Signature date: 06 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

EOSE transaction

Common Stock

Options Exercise

Transaction value
Shares: +11,407
Change %: +7.1%
Price: $5.48^*
Shares after: 171,634
Date: 21 Jul 2026
Ownership: Direct
Footnotes: F1

EOSE holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 5,000
Date: 21 Jul 2026
Ownership: See footnote
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

EOSE transaction Derivative

Subscription Rights (right to buy)

Options Exercise

Transaction value
Shares: -11,407
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 21 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 11,407
Exercise price: $5.48
Footnotes: F1, F3

EOSE transaction Derivative

Warrant (right to buy)

Options Exercise

Transaction value
Shares: +5,005
Change %
Price: $0.000000^*
Shares after: 5,005
Date: 21 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 5,005
Exercise price: $5.48
Footnotes: F1, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

Represents the conversion of a subscription right issued by the Issuer as part of a rights offering that closed on July 21, 2026 (the "Rights Offering"). Each subscription right was exercisable for units that consisted of (i) 1 share of common stock and (ii) 0.4388 of a warrant exercisable to acquire a share of common stock at an exercise price of $5.48 per share.

Footnote F2

Shares of records held by David Walters and Marian Walters as trustees of the D. and M. Walters Family Trust dtd 7/6/2020.

Footnote F3

Warrants became exercisable immediately after the Rights Offering closed and expire 10 years later, unless exercised or redeemed earlier. If a warrant is not exercised or redeemed before it expires, it will have no value.