Claude Demby - 19 May 2026 Form 4 Insider Report for Eos Energy Enterprises, Inc. (EOSE)

Reporting relationship: Director
Issuer ticker: EOSE
Reported as of: 19 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 19 May 2026, 19:29:55 UTC
Prior SEC filing: 29 Aug 2025
Next SEC filing: 09 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Michael Silberman as attorney-in-fact for Claude Demby

Key filing fact

Claude Demby filed Form 4 for Eos Energy Enterprises, Inc. (EOSE) on 19 May 2026.

Key facts

This page summarizes Claude Demby's Form 4 filing for Eos Energy Enterprises, Inc. (EOSE).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 19 May 2026, 19:29.

Change

Previous filing in this sequence was filed on 29 Aug 2025.
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 0001855640 Primary reporting owner

Demby Claude

Relationship: Director
Address: C/O EOS ENERGY ENTERPRISES, INC., 3920 PARK AVENUE, EDISON
Signature: /s/ Michael Silberman as attorney-in-fact for Claude Demby
Signature date: 19 May 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: +23,111
Change %: +16%
Price: $0.000000^*
Shares after: 164,819
Date: 19 May 2026
Ownership: Direct
Footnotes: F1

EOSE transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -9,244
Change %: -5.6%
Price: $6.88^*
Shares after: 155,575
Date: 19 May 2026
Ownership: Direct
Footnotes: F2

Reported derivative securities

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

EOSE transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -23,111
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 19 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 23,111
Exercise price
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

Each restricted stock unit ("RSU") represents a contingent right to receive one share of common stock.

Footnote F2

Represents the cash settlement on May 19, 2026 of RSUs granted on May 19, 2025. Each RSU was settled for $6.88, the closing price per share of common stock of the Company on May 19, 2026. No shares were actually issued to the reporting person, nor did the reporting person dispose of any shares.

Footnote F3

Not applicable.