Eos Energy director exercises 1,782 RSUs

Eos Energy Enterprises director Marian Walters reported an equity compensation event rather than an open‑market trade.

Rhea-AI Filing Summary

Eos Energy Enterprises director Marian Walters reported an equity compensation event rather than an open‑market trade. Walters exercised restricted stock units, converting 1,782 RSUs into 1,782 shares of common stock at a stated price of $0.00 per share.

Following this transaction, Walters holds 160,227 shares of common stock directly. An additional 5,000 common shares are held indirectly through the D. and M. Walters Family Trust dated July 6, 2020, where David and Marian Walters serve as trustees.

Insider Trade Summary

1,782 shares exercised/converted

Exercise 3 txns

Insider Walters Marian

Role Director

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	1,782	$0.00	$0.00
Exercise	Common Stock	1,782	$0.00	$0.00
holding	Common Stock	--	--	--

Holdings After Transaction: Restricted Stock Units — 0 contracts (Direct); Common Stock — 160,227 shares (Direct); Common Stock — 5,000 shares (Indirect, See footnote)

Footnotes (3)

1. F1. Each restricted stock unit ("RSU") represents a contingent right to receive one share of common stock.
2. 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
3. F3. Not applicable.

Key Figures

RSUs exercised: 1,782 shares Exercise price: $0.00 per share Direct common shares after transaction: 160,227 shares +2 more

5 metrics

RSUs exercised 1,782 shares Restricted stock units converted into common stock on June 2, 2026

Exercise price $0.00 per share Stated transaction price for RSU conversion

Direct common shares after transaction 160,227 shares Walters’ direct Eos Energy common stock holdings after RSU exercise

Indirect common shares 5,000 shares Held by D. and M. Walters Family Trust dated July 6, 2020

Derivative exercises 1 transaction, 1,782 shares Form 4 transactionSummary exerciseCount and exerciseShares

Key Terms

Restricted Stock Units, derivative security, indirect, trustees

4 terms

Restricted Stock Units financial

"security_title: "Restricted Stock Units" and footnote defining each RSU as a contingent right"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

derivative security financial

"transaction_code_description: "Exercise or conversion of derivative security""

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

indirect financial

"ownership_type: "indirect" and nature_of_ownership: "See footnote" for trust-held shares"

trustees financial

"footnote: "Shares of records held by David Walters and Marian Walters as trustees""

Trustees are people or a small group legally appointed to hold and manage assets, documents, or obligations on behalf of others and must act in those beneficiaries’ best interests. Think of them as a neutral guardian or custodian who enforces rules, protects assets, and makes decisions that can affect payments, corporate governance, or recovery in a default — all of which directly influence investor returns and risk.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Eos Energy (EOSE) director Marian Walters report?

Marian Walters reported an equity compensation transaction, not an open-market trade. She exercised 1,782 restricted stock units, which converted into 1,782 shares of Eos Energy common stock at a stated price of $0.00 per share on June 2, 2026.

How many Eos Energy (EOSE) shares does Marian Walters own after the latest Form 4?

After the reported transactions, Marian Walters directly owns 160,227 shares of Eos Energy common stock. In addition, 5,000 common shares are held indirectly through the D. and M. Walters Family Trust dated July 6, 2020, where she serves as a co-trustee.

Were there any open-market buys or sells in Marian Walters’ latest EOSE Form 4?

The Form 4 does not show any open-market purchases or sales. It reports an exercise of 1,782 restricted stock units into common stock and an indirect holding entry for 5,000 shares held by the D. and M. Walters Family Trust dated July 6, 2020.

What does the 1,782-share RSU exercise mean for Eos Energy (EOSE) shareholders?

The 1,782-share RSU exercise reflects stock-based compensation being converted into common stock. It increases Marian Walters’ direct holdings to 160,227 shares. This type of transaction typically shows equity awards vesting, rather than a discretionary decision to buy or sell shares in the market.

How are the 5,000 Eos Energy (EOSE) shares attributed to Marian Walters held?

The 5,000 Eos Energy shares are held indirectly through the D. and M. Walters Family Trust dated July 6, 2020. The Form 4 notes they are "shares of record" held by David Walters and Marian Walters as trustees, reflecting indirect ownership rather than direct personal registration.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 06/03/2026 - 04:53 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Walters Marian

(Last) (First) (Middle)

C/O EOS ENERGY ENTERPRISES, INC.

3920 PARK AVENUE

(Street)

EDISON NEW JERSEY 08820

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Eos Energy Enterprises, Inc. [ EOSE ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/02/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	06/02/2026		M		1,782	A	$0(1)	160,227	D
Common Stock								5,000	I	See footnote(2)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	(1)	06/02/2026		M			1,782	(3)	(3)	Common Stock	1,782	$0	0	D

Explanation of Responses:

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

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

3. Not applicable.

Remarks:

	/s/ Michael Silberman as attorney-in-fact for Marian Walters	06/03/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)