[Form 4] Eos Energy Enterprises, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Sumeet Puri, Chief Accounting Officer of Eos Energy Enterprises, Inc. (EOSE), reported stock transactions related to vested restricted stock units and subsequent open-market sales. On 09/05/2025, 68,334 restricted stock units (RSUs) became vested and were reported as acquired at $0, increasing beneficial ownership to 204,791 shares. On 09/08/2025 the reporting person sold 20,501 shares at a weighted-average price of $6.98 and 20,000 shares at a weighted-average price of $7.25, reducing beneficial ownership to 164,290 shares. The sales were effected pursuant to a Rule 10b5-1 trading plan adopted March 14, 2025 and to satisfy estimated tax liabilities arising from RSU vesting.

Positive

• RSUs converted to shares, indicating compensation was granted and vested (68,334 RSUs acquired at $0).
• Sales executed under a Rule 10b5-1 plan, demonstrating use of a pre-established trading plan for orderly disposition.
• Filing discloses weighted-average prices and offers to provide full trade breakdowns, enhancing transparency.

Negative

• Insider sold shares, reducing beneficial ownership from 204,791 to 164,290 shares.
• Sales included multiple transactions with prices as low as $6.87, which could modestly dilute insider ownership influence.

Insights

Securities Analyst

TL;DR: Insider received RSUs that vested and sold a portion under a pre-established 10b5-1 plan to cover tax obligations, modestly reducing holdings.

The 09/05/2025 grant/vesting of 68,334 RSUs represents compensation conversion into common stock, recorded as acquisitions at $0 per share, which increased reported beneficial ownership to 204,791 shares. The subsequent sales on 09/08/2025 — 20,501 shares at a weighted-average $6.98 and 20,000 shares at a weighted-average $7.25 — were executed under a Rule 10b5-1 plan and to satisfy estimated tax liabilities. These are routine insider transactions tied to equity compensation; they disclose intent to comply with tax obligations and adopt a structured selling plan rather than ad-hoc selling. Impact to investors is generally neutral absent additional material changes in ownership concentration.

Corporate Governance Expert

TL;DR: Transactions follow governance best practices: vesting, tax-withholding, and use of a documented 10b5-1 trading plan with disclosures.

The filing documents timely disclosure of RSU vesting and subsequent sales, including weighted-average sale price ranges and an undertaking to provide detailed trade breakdowns upon request. Use of a pre-established 10b5-1 trading plan adopted March 14, 2025 provides an affirmative defense for trades and reduces concerns about opportunistic timing. The filing is complete in noting the purpose of sales (tax liabilities) and includes signature by an attorney-in-fact, consistent with procedural norms.

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^*

Puri Sumeet

(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)
	Chief Accounting Officer

3. Date of Earliest Transaction (Month/Day/Year)
09/05/2025

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	09/05/2025		M		68,334	A	$0(1)	204,791	D
Common Stock	09/08/2025		S(2)		20,501	D	$6.98(3)	184,290	D
Common Stock	09/08/2025		S(4)		20,000	D	$7.25(5)	164,290	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(6)	(1)	09/05/2025		M			68,334	(7)	(7)	Common Stock	68,334	$0	68,333	D

Explanation of Responses:

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

2. The transaction reported represents a sale effected automatically pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 14, 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 $6.87 to $7.41, 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 transaction reported represents a sale by the reporting person to satisfy estimated tax liabilities arising from vesting of restricted stock units on July 25, 2025 and September 5, 2025, to the extent the estimated tax liabilities exceeded the amount sold on July 29, 2025 and September 8, 2025 pursuant to the Rule 10b5-1 trading plan adopted by the reporting person on March 14, 2025.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $7.20 to $7.37, 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.

6. 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.

7. Not applicable.

Remarks:

	/s/ Michael Silberman as attorney-in-fact for Sumeet Puri	09/08/2025
	** 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 transactions did Sumeet Puri report on Form 4 for EOSE?

The filing reports vesting/acquisition of 68,334 RSUs on 09/05/2025 and sales of 20,501 shares at a $6.98 weighted-average and 20,000 shares at a $7.25 weighted-average on 09/08/2025.

Why were shares sold by the insider in the EOSE Form 4?

The sales were made pursuant to a Rule 10b5-1 trading plan adopted March 14, 2025 and to satisfy estimated tax liabilities arising from RSU vesting.

How did these transactions affect Sumeet Puri's beneficial ownership of EOSE?

Beneficial ownership decreased from 204,791 shares after vesting to 164,290 shares following the reported sales.

What prices were reported for the sales in the Form 4?

The filing reports weighted-average sale prices: $6.98 for the 20,501-share tranche (range $6.87–$7.41) and $7.25 for the 20,000-share tranche (range $7.20–$7.37).

When was the 10b5-1 plan adopted for these trades?

The Rule 10b5-1 trading plan was adopted on March 14, 2025 according to the filing.