Was the EOSE insider share sale carried out under a Rule 10b5-1 trading plan?

Yes. The filing states the sales were executed automatically under a Rule 10b5-1 trading plan adopted on September 15, 2025 . The plan’s purpose was to cover estimated tax withholding obligations connected to the vesting of Silberman’s restricted stock units.

Eos Energy (NASDAQ: EOSE) CLO sells 14,998 shares after RSU vesting

Q: What did Eos Energy Enterprises (EOSE) insider Michael W. Silberman report in this Form 4?

He reported exercising 29,996 Restricted Stock Units into common shares and selling 14,998 shares at a weighted average price of $5.87 . These moves reflect routine equity compensation vesting and a related tax-focused sale, rather than a large discretionary position change.

Q: At what prices did Michael W. Silberman sell EOSE shares in the reported transaction?

He sold 14,998 common shares at a weighted average price of $5.87 per share. The filing notes multiple trades occurred in a range from $5.68 to $6.18 , and he will provide detailed trade breakdowns upon request to interested parties.

Q: How many EOSE shares and RSUs does Michael W. Silberman hold after these transactions?

After the reported activity, he directly owns 298,277 shares of common stock and 59,991 Restricted Stock Units . The RSUs were granted under Eos Energy Enterprises’ 2020 Incentive Plan and are scheduled to vest in three equal annual installments, subject to continued service.

Q: What is the structure of Michael W. Silberman’s EOSE RSU grant mentioned in this filing?

The filing explains that Silberman received RSUs under the 2020 Incentive Plan , each representing one future share of common stock. These units vest in three equal installments on each of the first three anniversaries of the grant date, conditioned on his continued service.

Filing Impact

(Neutral)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Eos Energy Enterprises Chief Legal Officer Michael W. Silberman reported routine equity compensation activity and a related tax sale. On June 26, 2026, he exercised 29,996 Restricted Stock Units, receiving the same number of common shares at a conversion price of $0.00 per share. On June 30, 2026, he sold 14,998 common shares in an open-market transaction at a weighted average price of $5.87 per share, with individual trades ranging from $5.68 to $6.18. According to the disclosure, this sale was executed automatically under a Rule 10b5-1 trading plan adopted on September 15, 2025 to cover estimated tax withholding obligations tied to RSU vesting. After these transactions, Silberman directly holds 298,277 common shares and 59,991 RSUs that will vest in three equal annual installments under the company’s 2020 Incentive Plan.

Insights

Routine RSU vesting with a pre-planned tax-related share sale; limited directional signal.

The filing shows Michael W. Silberman converting 29,996 RSUs into common stock, then selling 14,998 shares at a weighted average of $5.87. The RSUs vest over three years under the 2020 Incentive Plan, reflecting standard executive compensation.

The sale was executed automatically under a Rule 10b5-1 trading plan adopted on September 15, 2025 to cover estimated tax withholding obligations. This framing indicates the transaction is primarily tax- and plan-driven, not an opportunistic discretionary trade.

After the activity, Silberman still holds 298,277 common shares and 59,991 RSUs, so the net sale represents a relatively small portion of his visible equity exposure. Overall, this appears as routine compensation management rather than a major change in insider positioning, with limited impact on the broader investment case.

Insider Trade Summary 10b5-1

Net Seller: 14,998 shares ($88,038)

Net Sell 3 txns

Insider Silberman Michael W

Role Chief Legal Officer

Sold 14,998 shs ($88K)

Type	Security	Shares	Price	Value
Sale	Common Stock	14,998	$5.87	$88K
Exercise	Restricted Stock Units	29,996	$0.00	--
Exercise	Common Stock	29,996	$0.00	--

Holdings After Transaction: Common Stock — 298,277 shares (Direct, null); Restricted Stock Units — 59,991 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 $5.68 to $6.18, 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: 14,998 shares Sale price (weighted average): $5.87 per share RSUs exercised: 29,996 RSUs +3 more

6 metrics

Shares sold 14,998 shares Open-market sale on June 30, 2026

Sale price (weighted average) $5.87 per share Common stock sale, trades from $5.68 to $6.18

RSUs exercised 29,996 RSUs Converted to common stock on June 26, 2026

Common shares held after 298,277 shares Direct ownership following reported transactions

RSUs held after 59,991 RSUs Outstanding under 2020 Incentive Plan

Conversion price $0.00 per share RSU-to-common stock conversion

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"

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"

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."

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"

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/30/2026 - 05:07 PM Accepted by SEC EDGAR 06/30/2026 - 05:06 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^*

Silberman Michael W

(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)
	Chief Legal Officer

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		29,996	A	$0⁽¹⁾	313,275	D
Common Stock	06/30/2026		S⁽²⁾		14,998	D	$5.87⁽³⁾	298,277	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			29,996	⁽⁵⁾	⁽⁵⁾	Common Stock	29,996	$0	59,991	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 $5.68 to $6.18, 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	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 did Eos Energy Enterprises (EOSE) insider Michael W. Silberman report in this Form 4?

He reported exercising 29,996 Restricted Stock Units into common shares and selling 14,998 shares at a weighted average price of $5.87. These moves reflect routine equity compensation vesting and a related tax-focused sale, rather than a large discretionary position change.

At what prices did Michael W. Silberman sell EOSE shares in the reported transaction?

He sold 14,998 common shares at a weighted average price of $5.87 per share. The filing notes multiple trades occurred in a range from $5.68 to $6.18, and he will provide detailed trade breakdowns upon request to interested parties.

How many EOSE shares and RSUs does Michael W. Silberman hold after these transactions?

After the reported activity, he directly owns 298,277 shares of common stock and 59,991 Restricted Stock Units. The RSUs were granted under Eos Energy Enterprises’ 2020 Incentive Plan and are scheduled to vest in three equal annual installments, subject to continued service.

What is the structure of Michael W. Silberman’s EOSE RSU grant mentioned in this filing?

The filing explains that Silberman received RSUs under the 2020 Incentive Plan, each representing one future share of common stock. These units vest in three equal installments on each of the first three anniversaries of the grant date, conditioned on his continued service.