Eos Energy (NASDAQ: EOSE) director converts 23,111 RSUs into common stock

Rhea-AI Filing Summary

Eos Energy Enterprises director David Urban exercised restricted stock units into common shares. On May 19, 2026, he converted 23,111 restricted stock units into 23,111 shares of common stock at a price of $0.00 per share. Following this transaction, he directly owns 85,582 shares of common stock, and the exercised RSUs now show a balance of zero in this filing. The activity reflects a derivative exercise with no reported open-market buying or selling.

Insider Trade Summary

23,111 shares exercised/converted

Mixed 2 txns

Insider Urban David

Role null

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

Holdings After Transaction: Restricted Stock Units — 0 shares (Direct, null); Common Stock — 85,582 shares (Direct, null)

Footnotes (1)

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

Key Figures

RSUs exercised: 23,111 units Common shares acquired: 23,111 shares Exercise price: $0.00 per share +1 more

4 metrics

RSUs exercised 23,111 units Restricted stock units converted to common stock on May 19, 2026

Common shares acquired 23,111 shares Shares of common stock received from RSU exercise

Exercise price $0.00 per share Price per share for RSU conversion to common stock

Shares held after transaction 85,582 shares Total direct common stock ownership after Form 4 transactions

Key Terms

Restricted Stock Units, derivative security, Common Stock

3 terms

Restricted Stock Units financial

"The filing reports 23,111 shares of "Restricted Stock Units" as a derivative security."

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

"The M code is described as "Exercise or conversion of derivative security" for this transaction."

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.

Common Stock financial

"Urban acquired 23,111 shares of "Common Stock" upon exercising restricted stock units."

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Form 4 Insider Transactions: What Each Field Means →

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^*

Urban David

(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)	85,582	D

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	(2)	(2)	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. Not applicable.

Remarks:

	/s/ Michael Silberman as attorney-in-fact for David Urban	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)

FAQ

What insider transaction did David Urban report at Eos Energy Enterprises (EOSE)?

Director David Urban reported exercising 23,111 restricted stock units into 23,111 shares of common stock. The transaction used code M, indicating an exercise or conversion of a derivative security rather than an open-market purchase or sale of Eos Energy Enterprises shares.

Did David Urban buy or sell EOSE shares on the open market in this Form 4?

This Form 4 does not show any open-market buys or sells by David Urban. It reports a derivative exercise, where restricted stock units converted into common shares at $0.00 per share, without a separate market purchase or sale transaction being disclosed.

How many Eos Energy Enterprises shares does David Urban hold after this transaction?

After exercising 23,111 restricted stock units into common stock, David Urban directly holds 85,582 shares of Eos Energy Enterprises common stock. The filing shows this as his total direct ownership following the reported Form 4 transactions on May 19, 2026.

What does the M transaction code mean in David Urban’s EOSE Form 4?

The M transaction code on David Urban’s Form 4 indicates an exercise or conversion of a derivative security. In this case, restricted stock units were converted into common stock, reflecting a derivative exercise rather than a standard buy or sell on the open market.

What happened to David Urban’s restricted stock units in this EOSE filing?

The filing shows 23,111 restricted stock units being exercised into 23,111 shares of common stock at $0.00 per share. After this transaction, the reported balance of these restricted stock units is zero, meaning all units covered by this entry have been converted.