STOCK TITAN

Eos Energy (EOSE) director exercises options, sells 22,319 common shares

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

Rhea-AI Filing Summary

Eos Energy Enterprises director Marian Walters exercised stock options and sold the resulting shares. Walters exercised options for 22,319 shares of common stock at $1.18 per share, then sold 22,319 shares in an open-market transaction at a weighted average price of $7.20 per share.

After these transactions, Walters directly holds 158,445 shares of common stock and 65,018 stock options. An additional 5,000 shares are held indirectly through the D. and M. Walters Family Trust dated July 6, 2020.

Positive

  • None.

Negative

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Insider Walters Marian
Role null
Sold 22,319 shs ($161K)
Type Security Shares Price Value
Exercise Stock Option (Right to Buy) 22,319 $0.00 --
Exercise Common Stock 22,319 $1.18 $26K
Sale Common Stock 22,319 $7.20 $161K
holding Common Stock -- -- --
Holdings After Transaction: Stock Option (Right to Buy) — 65,018 shares (Direct, null); Common Stock — 180,764 shares (Direct, null); Common Stock — 5,000 shares (Indirect, See footnote)
Footnotes (1)
  1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $7.04 to $7.26, 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. Shares of records held by David Walters and Marian Walters as trustees of the D. and M. Walters Family Trust dtd 7/6/2020 On May 19, 2022 the reporting person was granted stock options to purchase 145,018 shares of common stock which vested on May 19, 2023. 57,681 of these stock options were previously exercised on December 4, 2025 and May 19, 2026.
Shares sold 22,319 shares Open-market sale of common stock on May 20, 2026
Weighted average sale price $7.20 per share Sales between $7.04 and $7.26 on May 20, 2026
Options exercise price $1.18 per share Exercise of 22,319 stock options into common shares
Direct holdings after transactions 158,445 shares Common stock directly owned following sale
Indirect trust holdings 5,000 shares Held by D. and M. Walters Family Trust
Remaining stock options 65,018 options Options outstanding after latest 22,319-share exercise
Original option grant 145,018 options Granted on May 19, 2022, vested May 19, 2023
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.
Stock Option (Right to Buy) financial
"security_title: Stock Option (Right to Buy)"
open-market sale financial
"transaction_action: open-market sale"
An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.
derivative security financial
"transaction_code_description: Exercise or conversion of derivative security"
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
Family Trust financial
"Walters Family Trust dtd 7/6/2020"
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).
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*
Walters Marian

(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)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/20/2026
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 Stock05/20/2026M22,319A$1.18180,764D
Common Stock05/20/2026S22,319D$7.2(1)158,445D
Common Stock5,000ISee footnote(2)
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
Stock Option (Right to Buy)$1.1805/20/2026M22,319 (3)05/19/2027Common Stock22,319$065,018D
Explanation of Responses:
1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $7.04 to $7.26, 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.
2. Shares of records held by David Walters and Marian Walters as trustees of the D. and M. Walters Family Trust dtd 7/6/2020
3. On May 19, 2022 the reporting person was granted stock options to purchase 145,018 shares of common stock which vested on May 19, 2023. 57,681 of these stock options were previously exercised on December 4, 2025 and May 19, 2026.
Remarks:
/s/ Michael Silberman as attorney-in-fact for Marian Walters05/22/2026
** 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 did EOSE director Marian Walters do in this Form 4 filing?

Marian Walters exercised stock options and then sold the resulting shares. She exercised 22,319 options at $1.18 per share and sold 22,319 common shares in an open-market transaction at a weighted average price of $7.20 per share.

How many EOSE shares did Marian Walters sell and at what price?

Walters sold 22,319 shares of Eos Energy Enterprises common stock. These shares were sold in multiple trades at prices ranging from $7.04 to $7.26, resulting in a weighted average sale price of $7.20 per share.

How many EOSE shares does Marian Walters own after the reported transactions?

Following the transactions, Walters directly owns 158,445 shares of Eos Energy Enterprises common stock. She also has an indirect holding of 5,000 shares through the D. and M. Walters Family Trust dated July 6, 2020, as noted in the filing footnotes.

What stock options did Marian Walters exercise in this EOSE Form 4?

Walters exercised stock options to acquire 22,319 Eos Energy Enterprises shares at a conversion or exercise price of $1.18 per share. These options were part of a larger grant originally covering 145,018 shares of common stock awarded on May 19, 2022.

How many EOSE stock options does Marian Walters still hold?

After exercising 22,319 options in this transaction, Walters holds 65,018 remaining stock options. These options come from a grant of 145,018 options made on May 19, 2022, which vested on May 19, 2023, according to the filing’s footnotes.

What is the nature of Marian Walters’ indirect ownership in EOSE shares?

The filing shows an indirect holding of 5,000 Eos Energy Enterprises shares. These shares are held of record by David Walters and Marian Walters as trustees of the D. and M. Walters Family Trust dated July 6, 2020, as described in the footnotes.