Haiyan Song - 11 Sep 2026 Form 4 Insider Report for Eos Energy Enterprises, Inc. (EOSE)

Reporting relationship: Director
Issuer ticker: EOSE
Reported as of: 11 Sep 2026
Net transaction value: +$58,700
SEC form: 4
Accepted by SEC: 15 Sep 2026, 08:56:47 UTC
Prior SEC filing: 15 Jul 2026
Source filing: View source filing
Reporting owner signature: /s/ Sumeet Puri as attorney-in-fact for Haiyan Song

Key filing fact

Haiyan Song filed Form 4 for Eos Energy Enterprises, Inc. (EOSE) on 15 Sep 2026.

Key facts

This page summarizes Haiyan Song's Form 4 filing for Eos Energy Enterprises, Inc. (EOSE).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 15 Sep 2026, 08:56.

Change

Previous filing in this sequence was filed on 15 Jul 2026.
Current net transaction value: +$58,700.

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 0001804708 Primary reporting owner

Song Haiyan

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 Haiyan Song
Signature date: 15 Sep 2026

Reported non-derivative transactions

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

EOSE transaction

Common Stock

Purchase

Transaction value: $39,500
Shares: +10,000
Change %
Price: $3.95
Shares after: 10,000
Date: 11 Sep 2026
Ownership: Direct

EOSE transaction

Common Stock

Purchase

Transaction value: $19,200
Shares: +5,000
Change %: +50%
Price: $3.84
Shares after: 15,000
Date: 14 Sep 2026
Ownership: Direct

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

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