Eos Energy CAO sells shares after RSU vesting

Rhea-AI Filing Summary

Eos Energy Enterprises, Inc. reported that Chief Accounting Officer Sumeet Puri converted 58,334 restricted stock units into common stock on July 25, 2026 and, on July 28, 2026, sold 29,167 common shares at a weighted average price of $3.36 under a Rule 10b5-1 trading plan adopted on September 15, 2025 to cover estimated tax withholding from the RSU vesting.

Insider Trade Summary 10b5-1

Exercise and sale activity reported; no spread calculated

Exercise and Sale 3 txns

Insider Puri Sumeet

Role Chief Accounting Officer

Sold 29,167 shs ($98K)

Approx. gross sale proceeds $98K

Type	Security	Shares	Price	Value
Sale	Common Stock F2, F3	29,167	$3.36	$98K
Exercise	Restricted Stock Units F4, F1, F5	58,334	$0.00	$0.00
Exercise	Common Stock F1	58,334	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 58,333 contracts (Direct); Common Stock — 202,279 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 $3.44, 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

Shares sold: 29,167 shares Weighted average sale price: $3.36 per share RSUs converted to common stock: 58,334 units +2 more

5 metrics

Shares sold 29,167 shares Common stock sale on July 28, 2026 at weighted average price $3.36

Weighted average sale price $3.36 per share Sale prices ranged from $3.23 to $3.44 per share

RSUs converted to common stock 58,334 units Restricted stock units converted into common shares on July 25, 2026

RSUs reported after transaction 58,333 units RSU position reported following the July 25, 2026 derivative transaction

10b5-1 plan adoption date September 15, 2025 Trading plan governing the July 28, 2026 sale to cover tax withholding

Key Terms

Rule 10b5-1 trading plan, restricted stock unit, weighted average price, 2020 Incentive Plan

4 terms

Rule 10b5-1 trading plan financial

"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.

restricted stock unit financial

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

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.

2020 Incentive Plan financial

"The reporting person 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 insider transactions did EOSE report for Chief Accounting Officer Sumeet Puri?

Eos Energy Enterprises reported that Chief Accounting Officer Sumeet Puri converted 58,334 RSUs into common stock and sold 29,167 common shares at a weighted average price of $3.36 per share in late July 2026.

Was the July 28, 2026 sale of EOSE shares by Sumeet Puri under a Rule 10b5-1 plan?

Yes. The 29,167-share sale on July 28, 2026 was executed automatically under a Rule 10b5-1 trading plan adopted on September 15, 2025 to cover estimated tax withholding on RSU vesting.

What price did Sumeet Puri receive for the EOSE shares sold on July 28, 2026?

The weighted average sale price was $3.36 per share. Footnotes state the 29,167 shares were sold in multiple transactions at prices ranging from $3.23 to $3.44 per share, inclusive.

How many EOSE restricted stock units did Sumeet Puri convert to common stock?

On July 25, 2026, Sumeet Puri converted 58,334 restricted stock units into an equal number of Eos Energy common shares. Each RSU represented a contingent right to receive one share of common stock upon vesting.

What is the vesting schedule for Sumeet Puri’s EOSE RSU grant under the 2020 Incentive Plan?

The RSUs were granted under the 2020 Incentive Plan and vest in three installments on each of the first three anniversaries of the grant date, subject to continued service through each vesting date.

How many EOSE RSUs remained reported for Sumeet Puri after the July 25, 2026 transaction?

Following the July 25, 2026 derivative transaction, the Form 4 reports 58,333 restricted stock units in the RSU line item, indicating a remaining RSU position associated with that grant.

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

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Accepted by SEC EDGAR 07/28/2026 - 05:03 PM EDT 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^*

Puri Sumeet

(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 Accounting 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		58,334	A	$0(1)	231,446	D
Common Stock	07/28/2026		S(2)		29,167	D	$3.36(3)	202,279	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			58,334	(5)	(5)	Common Stock	58,334	$0	58,333	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 $3.44, 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	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)