Eos Energy CCO trades shares after RSU conversion

Nathan Kroeker, Chief Commercial Officer of Eos Energy Enterprises, converted 220,834 restricted stock units into the same number of common shares on July 25, 2026 under the company’s 2020 Incentive Plan.

Rhea-AI Filing Summary

Nathan Kroeker, Chief Commercial Officer of Eos Energy Enterprises, converted 220,834 restricted stock units into the same number of common shares on July 25, 2026 under the company’s 2020 Incentive Plan. Each RSU represents a right to receive one share and vests in three annual installments, subject to continued service.

On July 28, 2026, he sold 110,417 common shares at a weighted average price of $3.36 per share, in multiple trades between $3.23 and $3.48. These sales were executed automatically pursuant to a Rule 10b5-1 trading plan adopted on September 15, 2025 to cover estimated tax withholding obligations arising from the RSU vesting.

Insider Trade Summary 10b5-1

Exercise and sale activity reported; no spread calculated

Exercise and Sale 3 txns

Insider Kroeker Nathan

Role Chief Commercial Officer

Sold 110,417 shs ($371K)

Approx. gross sale proceeds $371K

Type	Security	Shares	Price	Value
Sale	Common Stock F2, F3	110,417	$3.36	$371K
Exercise	Restricted Stock Units F4, F1, F5	220,834	$0.00	$0.00
Exercise	Common Stock F1	220,834	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 220,833 contracts (Direct); Common Stock — 887,527 shares (Direct)

Footnotes (5)

1. F1. Each restricted stock unit ("RSU") represents a contingent right to receive one share of common stock.
2. F2. 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.
3. F3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $3.23 to $3.48, 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.
4. F4. The reporting person received a grant of RSUs under the Issuer's 2020 Incentive Plan, which will vest in three installments on each of the first three anniversaries of the grant date, subject to continued service through each vesting date.
5. F5. Not applicable.

Key Figures

Common shares sold: 110,417 shares Weighted average sale price: $3.36 per share RSUs converted to common stock: 220,834 units/shares +2 more

5 metrics

Common shares sold 110,417 shares Open-market sale by Chief Commercial Officer on July 28, 2026

Weighted average sale price $3.36 per share Shares sold in multiple trades between $3.23 and $3.48

RSUs converted to common stock 220,834 units/shares Restricted stock units converting into common shares on July 25, 2026

RSUs remaining after transaction 220,833 units Restricted stock units reported as outstanding following the July 25, 2026 conversion

Rule 10b5-1 plan adoption date September 15, 2025 Trading plan governing the July 28, 2026 share sales

Key Terms

Rule 10b5-1 trading plan, restricted stock unit, weighted average price, tax withholding obligations, +1 more

5 terms

Rule 10b5-1 trading plan regulatory

"sales were effected automatically pursuant to a Rule 10b5-1 trading plan"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

restricted stock unit financial

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

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

weighted average price financial

"The price reported in Column 4 is a weighted average price"

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

tax withholding obligations financial

"trading plan adopted ... to cover estimated tax withholding obligations"

2020 Incentive Plan financial

"received a grant of RSUs under the Issuer's 2020 Incentive Plan"

FAQ

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

What transactions did EOSE’s Chief Commercial Officer report on this Form 4?

Nathan Kroeker reported converting 220,834 restricted stock units into common stock on July 25, 2026 and then selling 110,417 common shares on July 28, 2026 in open-market transactions under a pre-arranged Rule 10b5-1 trading plan.

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

He sold 110,417 common shares at a weighted average price of $3.36 per share. The sales occurred in multiple transactions at prices ranging from $3.23 to $3.48 per share, as disclosed in the Form 4 footnotes.

Were Nathan Kroeker’s EOSE share sales made under a Rule 10b5-1 plan?

Yes. The Form 4 states the sales were effected automatically under a Rule 10b5-1 trading plan adopted on September 15, 2025, specifically to cover estimated tax withholding obligations related to the vesting of his restricted stock units.

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

On July 25, 2026, 220,834 restricted stock units converted into the same number of common shares. A footnote explains these RSUs were granted under the 2020 Incentive Plan and vest in three annual installments, subject to continued service with the company.

Does the Form 4 show remaining EOSE restricted stock units for Nathan Kroeker?

Yes. After the July 25, 2026 conversion, the Form 4 reports 220,833 restricted stock units remaining. Each RSU represents a contingent right to receive one share of Eos Energy Enterprises common stock upon vesting, according to the disclosure.

Why were some of Nathan Kroeker’s EOSE shares sold after the RSU conversion?

The Form 4 states the 110,417-share sale was executed to cover estimated tax withholding obligations arising from the vesting of restricted stock units, and that these sales were carried out automatically under a pre-established Rule 10b5-1 trading plan.

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

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Available on EDGAR 07/28/2026 - 05:02 PM Accepted by SEC EDGAR 07/28/2026 - 05:02 PM 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).

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.

TWO ALLEGHENY CENTER, NOVA TOWER 2

(Street)

PITTSBURGH PENNSYLVANIA 15212

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/25/2026

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	07/25/2026		M		220,834	A	$0(1)	997,944	D
Common Stock	07/28/2026		S(2)		110,417	D	$3.36(3)	887,527	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(4)	(1)	07/25/2026		M			220,834	(5)	(5)	Common Stock	220,834	$0	220,833	D

Explanation of Responses:

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

2. 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.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $3.23 to $3.48, 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.

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

5. Not applicable.

Remarks:

	/s/ Sumeet Puri as attorney-in-fact for Nathan Kroeker	07/28/2026
	** 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)