Eos Energy director exercises 23,111 RSUs

Eos Energy Enterprises director Jeff McNeil reported routine equity compensation activity involving restricted stock units.

Rhea-AI Filing Summary

Eos Energy Enterprises director Jeff McNeil reported routine equity compensation activity involving restricted stock units. He exercised 23,111 RSUs into an equal number of shares of common stock at a price of $0.00 per share, increasing his directly held common stock.

Following the transaction, McNeil directly owns 122,290 shares of common stock. A separate entry shows an additional 227,272 common shares held indirectly by Jeff and Nanci McNeil as trustees of the 2022 Jeff McNeil and Nanci McNeil Charitable Remainder Unitrust.

Insider Trade Summary

23,111 shares exercised/converted

Exercise 3 txns

Insider McNeil Jeff

Role Director

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	23,111	$0.00	$0.00
Exercise	Common Stock	23,111	$0.00	$0.00
holding	Common Stock	--	--	--

Holdings After Transaction: Restricted Stock Units — 0 contracts (Direct); Common Stock — 122,290 shares (Direct); Common Stock — 227,272 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 Jeff McNeil and Nanci McNeil as trustees of the 2022 Jeff McNeil and Nanci McNeil Charitable Remainder Unitrust
3. F3. Not applicable.

Key Figures

RSUs exercised: 23,111 units Exercise price: $0.00 per share Direct common shares after: 122,290 shares +3 more

6 metrics

RSUs exercised 23,111 units Restricted Stock Units converted to common stock on transaction date

Exercise price $0.00 per share Conversion of RSUs into common stock

Direct common shares after 122,290 shares Direct ownership following RSU exercise

Indirect common shares 227,272 shares Held by 2022 Jeff and Nanci McNeil Charitable Remainder Unitrust

Derivative position after 0 RSUs Restricted Stock Units total shares following transaction

Exercise transactions 1 transaction Exercise or conversion of derivative security (code M)

Key Terms

Restricted Stock Units, RSU, derivative exercise/conversion, charitable remainder unitrust, +1 more

5 terms

Restricted Stock Units financial

"The filing lists “Restricted Stock Units” as the derivative security exercised."

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.

RSU financial

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

Restricted stock units (RSUs) are a form of company shares given to employees as part of their compensation, usually with certain restrictions or conditions, such as remaining with the company for a set period. When these restrictions lift, employees receive actual shares that they can sell or hold. For investors, RSUs can impact a company's stock supply and reflect the company's commitment to attracting and retaining talent.

derivative exercise/conversion financial

"The transaction action is described as a “derivative exercise/conversion” with code M."

charitable remainder unitrust financial

"Shares of record held by Jeff McNeil and Nanci McNeil as trustees of the 2022 Jeff McNeil and Nanci McNeil Charitable Remainder Unitrust"

indirect ownership financial

"An indirect ownership entry shows 227,272 common shares with nature of ownership referencing a footnote."

FAQ

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

What did EOSE director Jeff McNeil report in this Form 4?

Jeff McNeil reported exercising 23,111 restricted stock units into common shares of Eos Energy Enterprises. This derivative exercise increased his direct share ownership as part of routine equity compensation, without any open-market buying or selling activity disclosed.

How many EOSE shares does Jeff McNeil hold directly after the transactions?

After exercising 23,111 restricted stock units, Jeff McNeil directly holds 122,290 shares of Eos Energy common stock. This figure reflects his post-transaction direct ownership position reported in the Form 4 for the non-derivative common stock line.

What happened to the 23,111 restricted stock units reported for EOSE?

The 23,111 restricted stock units were converted into 23,111 shares of Eos Energy common stock at a conversion price of $0.00. After this exercise, the restricted stock unit position shown in the filing was reduced to zero shares outstanding.

Does Jeff McNeil have any indirect ownership of EOSE shares?

Yes. The filing shows 227,272 Eos Energy common shares held indirectly by Jeff and Nanci McNeil as trustees of the 2022 Jeff McNeil and Nanci McNeil Charitable Remainder Unitrust, in addition to his directly owned shares.

Were there any open-market buys or sells of EOSE stock in this Form 4?

No open-market buys or sells were reported. The filing shows a derivative exercise coded “M,” where restricted stock units converted into common shares, and a separate indirect holding entry, but no transactions coded as open-market purchases or sales.

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

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Accepted by SEC EDGAR 05/19/2026 - 07:33 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^*

McNeil Jeff

(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)
05/19/2026

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	05/19/2026		M		23,111	A	$0(1)	122,290	D
Common Stock								227,272	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)	05/19/2026		M			23,111	(3)	(3)	Common Stock	23,111	$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 Jeff McNeil and Nanci McNeil as trustees of the 2022 Jeff McNeil and Nanci McNeil Charitable Remainder Unitrust

3. Not applicable.

Remarks:

	/s/ Michael Silberman as attorney-in-fact for Jeff McNeil	05/19/2026
	** 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)