STOCK TITAN

Eos Energy (EOSE) CAO sells shares after RSU vesting under 10b5-1 plan

Filing Impact
(Neutral)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Eos Energy Enterprises Chief Accounting Officer Sumeet Puri reported routine equity activity tied to restricted stock units. On June 26, 2026, he exercised 17,545 RSUs, converting them into the same number of common shares at $0.00 per share, and his RSU balance became 35,389 units.

On June 30, 2026, he then sold 8,823 common shares at a weighted average price of $5.86, in multiple trades between $5.68 and $6.12. According to the filing, these sales were executed automatically under a Rule 10b5-1 trading plan adopted on September 12, 2025 to cover estimated tax withholding obligations related to RSU vesting.

After these transactions, Puri directly owns 173,112 shares of common stock, in addition to his remaining RSUs. The activity reflects compensation-related vesting and tax coverage rather than a discretionary change in his overall stake.

Positive

  • None.

Negative

  • None.
Insider Puri Sumeet
Role Chief Accounting Officer
Sold 8,823 shs ($52K)
Type Security Shares Price Value
Sale Common Stock 8,823 $5.86 $52K
Exercise Restricted Stock Units 17,545 $0.00 --
Exercise Common Stock 17,645 $0.00 --
Holdings After Transaction: Common Stock — 173,112 shares (Direct, null); Restricted Stock Units — 35,389 shares (Direct, null)
Footnotes (1)
  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 12, 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 $6.12, 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.
Shares sold 8,823 shares Open-market sale on June 30, 2026
Weighted average sale price $5.86 per share Common stock sales between $5.68 and $6.12
RSUs exercised 17,545 units Converted to common stock on June 26, 2026
Common shares held after transactions 173,112 shares Direct ownership following June 2026 activity
Remaining RSUs 35,389 units RSU balance after June 26, 2026 vesting
Price range of sales $5.68–$6.12 per share Multiple open-market trades on June 30, 2026
Net buy/sell shares 8,823 net shares sold Transaction summary net direction
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.
restricted stock unit ("RSU") financial
"Each restricted stock unit ("RSU") represents a contingent right to receive one share of common stock."
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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Learn about SEC filing dates
SEC Form 4
FORM 4UNITED 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 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)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Accounting 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)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock06/26/2026M17,645A$0(1)181,935D
Common Stock06/30/2026S(2)8,823D$5.86(3)173,112D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Units(4)(1)06/26/2026M17,545 (5) (5)Common Stock17,545$035,389D
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 12, 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 $6.12, 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 Sumeet Puri06/30/2026
** Signature of Reporting PersonDate
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)

FAQ

What insider transactions did EOSE Chief Accounting Officer Sumeet Puri report?

Sumeet Puri reported an RSU vesting and a related share sale. He exercised 17,545 restricted stock units into common shares, then sold 8,823 shares in the open market, all within one compensation-related and tax-focused transaction sequence.

How many EOSE shares did Sumeet Puri sell and at what price?

Puri sold 8,823 shares of Eos Energy common stock. The weighted average sale price was $5.86 per share, with individual trades occurring in a price range from $5.68 to $6.12, according to the Form 4 footnote.

Were Sumeet Puri’s EOSE share sales under a Rule 10b5-1 plan?

Yes, the sale was executed under a Rule 10b5-1 plan. The filing states the transactions were made automatically pursuant to a pre-established trading plan adopted on September 12, 2025, primarily to cover estimated tax withholding obligations from RSU vesting.

How many EOSE shares does Sumeet Puri own after these transactions?

After the reported trades, Puri directly owns 173,112 common shares. He also continues to hold 35,389 restricted stock units, which represent contingent rights to receive an equivalent number of additional Eos Energy common shares in the future, subject to vesting.

What happened to Sumeet Puri’s restricted stock units in this EOSE Form 4?

17,545 restricted stock units vested and converted into common shares. Each RSU represented a contingent right to one Eos Energy common share. Following the vesting, Puri’s remaining RSU balance is 35,389 units under the company’s 2020 Incentive Plan.

Why did Sumeet Puri sell EOSE shares after his RSUs vested?

The filing links the sale to tax withholding obligations. It explains that the shares were sold automatically under a Rule 10b5-1 trading plan to cover estimated tax withholding arising from the vesting of restricted stock units, rather than a discretionary portfolio decision.