What price range did the EOSE insider share sale cover on June 30, 2026?

The reported weighted average sale price was $5.86 per share. Footnotes explain that individual trades occurred at prices ranging from $5.66 to $6.19, and the reporting person will provide full trade-by-trade details to interested parties on request.

Eos Energy Enterprises (EOSE) interim CFO sells shares under 10b5-1 plan

Filing Impact

(Moderate)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Eos Energy Enterprises CCO and Interim CFO Nathan Kroeker reported a combination of option-style vesting and a share sale. On June 26, 2026, he exercised 70,578 Restricted Stock Units, converting them into the same number of common shares at a stated price of $0.00 per share. On June 30, 2026, he then sold 35,289 common shares in an open-market transaction at a weighted average price of $5.86 per share, with actual prices ranging from $5.66 to $6.19. The filing notes these sales were made automatically under a pre-arranged Rule 10b5-1 trading plan adopted to cover estimated tax withholding obligations related to RSU vesting. Following the transactions, Kroeker directly holds 697,801 common shares and 141,157 RSUs, which continue to vest in three equal annual installments subject to continued service.

Insights

Routine RSU vesting with a pre-planned tax-related sale under Rule 10b5-1.

The filing shows Nathan Kroeker acquiring 70,578 common shares through RSU conversion, then selling 35,289 shares at a weighted average price of $5.86. The remaining shares from the vesting increase his direct equity stake.

The footnotes state the sale was executed automatically under a Rule 10b5-1 trading plan to cover estimated tax withholding on RSU vesting. Such pre-planned, tax-driven trades are typically viewed as routine mechanics of equity compensation rather than discretionary market-timing decisions.

After the transactions, Kroeker holds 697,801 common shares and 141,157 RSUs, which vest in three equal annual installments subject to continued service. This indicates a continuing equity-based link to company performance despite the partial sale.

Insider Trade Summary 10b5-1

Net Seller: 35,289 shares ($206,794)

Net Sell 3 txns

Insider Kroeker Nathan

Role CCO and Interim CFO

Sold 35,289 shs ($207K)

Type	Security	Shares	Price	Value
Sale	Common Stock	35,289	$5.86	$207K
Exercise	Restricted Stock Units	70,578	$0.00	--
Exercise	Common Stock	70,578	$0.00	--

Holdings After Transaction: Common Stock — 697,801 shares (Direct, null); Restricted Stock Units — 141,157 shares (Direct, null)

Footnotes (1)

Each restricted stock unit ("RSU") represents a contingent right to receive one share of common stock. 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $5.66 to $6.19, 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. 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. Not applicable.

Key Figures

Shares sold: 35,289 shares Weighted average sale price: $5.86 per share RSUs exercised: 70,578 units +2 more

5 metrics

Shares sold 35,289 shares Open-market sale of common stock on June 30, 2026

Weighted average sale price $5.86 per share Common stock sold in range $5.66–$6.19

RSUs exercised 70,578 units Restricted Stock Units converted to common stock on June 26, 2026

Common shares held after 697,801 shares Direct ownership following reported transactions

RSUs held after 141,157 RSUs Remaining RSU balance after conversion transaction

Key Terms

Restricted Stock Units, Rule 10b5-1 trading plan, weighted average price, 2020 Incentive Plan

4 terms

Restricted Stock Units financial

"The reporting person received a grant of RSUs under the Issuer's 2020 Incentive Plan, which will vest in three equal installments"

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.

Rule 10b5-1 trading plan regulatory

"The sales reported in this Form 4 were effected automatically pursuant to a Rule 10b5-1 trading plan adopted by the reporting person"

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.

weighted average price financial

"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions"

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.

2020 Incentive Plan financial

"The reporting person received a grant of RSUs under the Issuer's 2020 Incentive Plan, which will vest in three equal installments"

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/30/2026 - 05:06 PM Accepted by SEC EDGAR 06/30/2026 - 05:05 PM

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^*

Kroeker Nathan

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/26/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	06/26/2026		M		70,578	A	$0⁽¹⁾	733,090	D
Common Stock	06/30/2026		S⁽²⁾		35,289	D	$5.86⁽³⁾	697,801	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Restricted Stock Units⁽⁴⁾	⁽¹⁾	06/26/2026		M			70,578	⁽⁵⁾	⁽⁵⁾	Common Stock	70,578	$0	141,157	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 $5.66 to $6.19, 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 equal 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/ Michael Silberman as attorney-in-fact for Nathan Kroeker	06/30/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transactions did EOSE executive Nathan Kroeker report on this Form 4?

Nathan Kroeker reported exercising 70,578 Restricted Stock Units into common shares and selling 35,289 common shares. The sale was an open-market transaction at a weighted average price of $5.86 per share, with trades executed between $5.66 and $6.19.

Why did EOSE’s interim CFO sell 35,289 shares of common stock?

The filing states the sale was made automatically under a Rule 10b5-1 trading plan to cover estimated tax withholding obligations from RSU vesting. This indicates the transaction was pre-planned and tied to compensation-related taxes rather than a discretionary portfolio shift.

How many EOSE shares and RSUs does Nathan Kroeker hold after these transactions?

After the reported transactions, Nathan Kroeker directly holds 697,801 shares of Eos Energy Enterprises common stock and 141,157 Restricted Stock Units. The remaining RSUs vest in three equal annual installments, contingent on his continued service with the company.

How do the RSUs in this EOSE Form 4 vest over time?

The RSU grant vests in three equal installments on each of the first three anniversaries of the grant date. Vesting remains subject to Nathan Kroeker’s continued service through each vesting date, aligning his compensation with ongoing tenure at the company.

What is a Rule 10b5-1 trading plan in the context of this EOSE filing?

A Rule 10b5-1 trading plan allows insiders to pre-schedule trades. In this case, the plan adopted on September 15, 2025 automatically executed sales to cover estimated tax withholding on RSU vesting, reducing the significance of day-to-day market timing decisions by the insider.