Eos Energy director awarded 21,253 RSUs

DIMITRIEF ALEXANDER reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

DIMITRIEF ALEXANDER reported acquisition or exercise transactions in this Form 4 filing.

Eos Energy Enterprises director Alexander Dimitrief received a compensation grant of 21,253 restricted stock units (RSUs). Each RSU represents a contingent right to receive one share of common stock. The RSUs vest on the earlier of the first anniversary of the grant date or immediately before the company’s next annual shareholders meeting.

The award settles in either cash or common stock, as provided in the grant terms. Following this grant, Dimitrief holds 21,253 RSUs directly, with no open-market purchase or sale involved in this filing.

Insider Trade Summary

Grant/Award: 21,253 shares

Grant/Award 1 txn

Insider DIMITRIEF ALEXANDER

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	21,253	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 21,253 contracts (Direct)

Footnotes (3)

1. F1. Each restricted stock unit ("RSU") represents a contingent right to receive one share of common stock.
2. F2. The reporting person was granted RSUs that settle in cash or common stock, which will vest on the earlier of (i) the first anniversary of the grant date and (ii) immediately prior to the date of the next annual shareholders meeting of the Company following the grant date.
3. F3. Not applicable.

Key Figures

RSUs granted: 21,253 units Underlying common shares: 21,253 shares Post-grant RSU holdings: 21,253 units +2 more

5 metrics

RSUs granted 21,253 units Restricted stock units granted on 2026-06-05

Underlying common shares 21,253 shares Each RSU represents one share of common stock

Post-grant RSU holdings 21,253 units Total RSUs held directly after the transaction

Vesting trigger Earlier of 1-year or next annual meeting Vesting schedule for the RSU award

Grant price $0.00 per unit RSUs granted as compensation, no purchase price

Key Terms

Restricted Stock Units, contingent right, annual shareholders meeting, settle in cash or common stock

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.

contingent right financial

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

annual shareholders meeting financial

"will vest on the earlier of the first anniversary of the grant date and immediately prior to the date of the next annual shareholders meeting"

An annual shareholders meeting is a yearly gathering where owners of a company review its performance, hear presentations from management, ask questions, and vote on important items such as board members, executive pay, and dividend policies. Think of it as a company town hall where votes and discussions can change leadership, strategy or payouts—outcomes that can directly affect a stock’s future performance and an investor’s rights and returns.

settle in cash or common stock financial

"RSUs that settle in cash or common stock, which will vest on the earlier of the first anniversary"

FAQ

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

What insider transaction did Eos Energy (EOSE) report for Alexander Dimitrief?

Eos Energy reported that director Alexander Dimitrief received a grant of 21,253 restricted stock units. These RSUs are a form of equity compensation and give him a contingent right to receive an equal number of Eos Energy common shares, subject to vesting conditions.

How many restricted stock units did the EOSE director receive in this Form 4 filing?

The director received 21,253 restricted stock units. Each RSU represents a contingent right to one share of Eos Energy common stock, subject to vesting. This grant increased his directly held RSU balance to 21,253 units after the reported transaction.

What are the vesting terms for the 21,253 RSUs granted by Eos Energy (EOSE)?

The 21,253 RSUs vest on the earlier of two dates: the first anniversary of the grant or immediately before Eos Energy’s next annual shareholders meeting. This schedule links vesting to the director’s ongoing board service and the company’s annual meeting cycle.

How will the Eos Energy (EOSE) RSUs granted to the director settle at vesting?

The RSUs will settle in either cash or Eos Energy common stock, as specified in the grant terms. Each vested RSU corresponds to one share of common stock, providing flexibility in how the company ultimately delivers the director’s compensation value.

Did the Eos Energy (EOSE) director buy or sell shares on the market in this Form 4?

No open-market buy or sell occurred. The Form 4 reports a grant of 21,253 restricted stock units as compensation, with no purchase price. It is categorized as an acquisition through a grant or award rather than a market transaction.

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

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Accepted by SEC EDGAR 06/09/2026 - 04:21 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^*

DIMITRIEF ALEXANDER

(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)
06/05/2026

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

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)	06/05/2026		A		21,253		(2)	(3)	Common Stock	21,253	$0	21,253	D

Explanation of Responses:

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

2. The reporting person was granted RSUs that settle in cash or common stock, which will vest on the earlier of (i) the first anniversary of the grant date and (ii) immediately prior to the date of the next annual shareholders meeting of the Company following the grant date.

3. Not applicable.

Remarks:

	/s/ Michael Silberman as attorney-in-fact for Alexander Dimitrief	06/09/2026
	** 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)