Eos Energy (NASDAQ: EOSE) CCO sells 50,000 shares for tax obligations

Rhea-AI Filing Summary

Eos Energy Enterprises executive Nathan Kroeker reported equity transactions tied to his compensation. On January 23, 2026, 100,000 restricted stock units converted into an equal number of common shares at an exercise price of $0, increasing his directly held common stock to 712,512 shares.

On January 26, 2026, under a pre-arranged Rule 10b5-1 trading plan adopted on September 15, 2025, he sold 50,000 common shares at a weighted average price of $16.04, in multiple trades between $15.71 and $16.92, primarily to cover estimated tax withholding obligations related to the RSU vesting. After these transactions, he directly owned 662,512 shares of Eos Energy common stock as CCO and Interim CFO.

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

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

X

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^*

Kroeker Nathan

(Last) (First) (Middle)

C/O EOS ENERGY ENTERPRISES, INC.

3920 PARK AVENUE

(Street)

EDISON NJ 08820

(City) (State) (Zip)

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

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CCO and Interim CFO

3. Date of Earliest Transaction (Month/Day/Year)
01/23/2026

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

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

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

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	01/23/2026		M		100,000	A	$0	712,512	D
Common Stock	01/26/2026		S(1)		50,000	D	$16.04(2)	662,512	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(3)	(4)	01/23/2026		M			100,000	(5)	(5)	Common Stock	100,000	$0	0	D

Explanation of Responses:

1. The sales reported in this Form 4 were effected automatically pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 15, 2025 to cover estimated tax withholding obligations in connection with the vesting of restricted stock units.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.71 to $16.92, inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

3. The reporting person received a grant of RSUs under the Issuer's 2020 Incentive Plan, which will vest in three equal installments on each of the first three anniversaries of the grant date, subject to continued service through each vesting date.

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

5. Not applicable.

Remarks:

	/s/ Michael Silberman as attorney-in-fact for Nathan Kroeker	01/26/2026
	** 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.

FAQ

What insider activity did EOSE report for Nathan Kroeker on this Form 4?

The filing shows that Nathan Kroeker, Eos Energy Enterprises' CCO and Interim CFO, had 100,000 restricted stock units convert into common stock and then sold 50,000 common shares in a planned transaction.

How many EOSE shares did Nathan Kroeker sell and at what price?

On January 26, 2026, he sold 50,000 shares of Eos Energy common stock at a weighted average price of $16.04 per share, with individual trades occurring between $15.71 and $16.92.

Were the EOSE insider sales by Nathan Kroeker pre-planned?

Yes. The sales were executed automatically under a Rule 10b5-1 trading plan that Kroeker adopted on September 15, 2025 to handle estimated tax withholding obligations from RSU vesting.

What happened to Nathan Kroeker’s restricted stock units in EOSE?

On January 23, 2026, 100,000 restricted stock units converted into 100,000 shares of Eos Energy common stock at an exercise price of $0, reflecting the vesting and settlement of those RSUs.

How many EOSE shares does Nathan Kroeker own after these transactions?

Following the RSU conversion and subsequent sale, Nathan Kroeker directly owned 662,512 shares of Eos Energy Enterprises common stock.

What role does Nathan Kroeker hold at Eos Energy Enterprises (EOSE)?

According to the filing, Nathan Kroeker serves as Chief Commercial Officer (CCO) and Interim Chief Financial Officer (CFO) of Eos Energy Enterprises.