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Eos Energy Enterprises (EOSE) CAO exercises rights, gains shares and 1,134 warrants

(Neutral)
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Eos Energy Enterprises, Inc. reported that Chief Administration Officer Michelle Buczkowski exercised subscription rights from a rights offering that closed on July 21, 2026, converting them into 2,585 shares of common stock at $5.48 per share and receiving 1,134 warrants. After these transactions she directly holds 61,827 common shares and 1,134 warrants, each warrant exercisable to acquire a share of common stock at $5.48 per share.

Positive

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Insider Buczkowski Michelle
Role Chief Administration Officer
Type Security Shares Price Value
Exercise Subscription Rights (right to buy) F1 2,585 $0.00 $0.00
Exercise Warrant (right to buy) F1, F2 1,134 $0.00 $0.00
Exercise Common Stock F1 2,585 $5.48 $14K
Holdings After Transaction: Subscription Rights (right to buy) — 0 shares (Direct); Warrant (right to buy) — 1,134 shares (Direct); Common Stock — 61,827 shares (Direct)
Footnotes (2)
  1. F1. Represents the conversion of a subscription right issued by the Issuer as part of a rights offering that closed on July 21, 2026 (the "Rights Offering"). Each subscription right was exercisable for units that consisted of (i) 1 share of common stock and (ii) 0.4388 of a warrant exercisable to acquire a share of common stock at an exercise price of $5.48 per share.
  2. F2. Warrants became exercisable immediately after the Rights Offering closed and expire 10 years later, unless exercised or redeemed earlier. If a warrant is not exercised or redeemed before it expires, it will have no value.
Common shares acquired 2,585 shares Shares of common stock received on July 21, 2026 from exercising subscription rights
Exercise price for common shares and warrants $5.48 per share Exercise price of units in the rights offering and of the warrants
Common shares held after transactions 61,827 shares Direct Eos Energy common stock holdings following the July 21, 2026 exercises
Warrants acquired 1,134 warrants Warrants received in connection with the rights offering units on July 21, 2026
Rights offering unit warrant fraction 0.4388 of a warrant Each subscription right unit included 1 share plus 0.4388 of a warrant
Warrant term 10 years Warrants expire 10 years after the rights offering closed unless exercised or redeemed earlier
Subscription Rights financial
"Represents the conversion of a subscription right issued by the Issuer as part of a rights offering"
Subscription rights are short-term privileges given to existing shareholders to buy additional new shares before the general public, typically at a set price and in proportion to their current holdings. Think of it as getting a coupon for first dibs on extra slices of a pizza so your share of the pie doesn’t shrink; exercising them can be a cheaper way to maintain your ownership and voting power, while ignoring them can reduce your stake and potential future earnings.
rights offering financial
"subscription right issued by the Issuer as part of a rights offering that closed on July 21, 2026"
A rights offering is a way for a company to raise additional money by giving existing shareholders the opportunity to buy more shares at a discounted price before they are offered to the public. It’s similar to a special sale where current owners get the first chance to buy extra items at a lower cost, allowing them to increase their investment if they choose. This process matters to investors because it can affect the value of their holdings and their ability to buy new shares at favorable terms.
warrant financial
"0.4388 of a warrant exercisable to acquire a share of common stock at an exercise price of $5.48"
A warrant is a time-limited financial contract that gives its holder the right to buy a company's shares at a set price before a specified date, like a coupon that lets you purchase stock at a fixed discount for a limited time. It matters to investors because warrants offer leveraged exposure to a stock’s upside and can dilute existing shareholders if exercised, so they affect potential gains and the company’s outstanding share count.
exercise price financial
"a warrant exercisable to acquire a share of common stock at an exercise price of $5.48 per share"
The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.
derivative security financial
"transaction code M indicates an 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.

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

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FAQ

What insider transaction did EOSE report for Michelle Buczkowski on July 21, 2026?

Michelle Buczkowski exercised subscription rights in a rights offering that closed on July 21, 2026, receiving 2,585 common shares at $5.48 per share and 1,134 warrants. The Form 4 records these as derivative exercises and resulting common stock acquisitions.

How many EOSE common shares does Michelle Buczkowski own after the reported Form 4 transactions?

After the reported transactions, Michelle Buczkowski directly owns 61,827 shares of Eos Energy Enterprises common stock. This reflects the addition of 2,585 shares received upon exercising subscription rights in connection with the company’s rights offering that closed July 21, 2026.

What warrants did Michelle Buczkowski acquire in the EOSE rights offering?

Buczkowski acquired 1,134 warrants, each exercisable to purchase one share of Eos Energy Enterprises common stock at an exercise price of $5.48 per share. The warrants became exercisable immediately after the rights offering closed and expire 10 years later unless exercised or redeemed earlier.

How were the EOSE subscription rights structured in the reported Form 4?

Each subscription right was exercisable for units consisting of 1 share of common stock and 0.4388 of a warrant to acquire a share of common stock at $5.48 per share. Buczkowski’s Form 4 shows conversion of these rights into 2,585 shares and 1,134 warrants.

Did the EOSE Form 4 report any market purchases or sales by Michelle Buczkowski?

The Form 4 reports exercises and conversions of subscription rights and issuance of warrants, resulting in additional common shares, but it does not show any open-market purchases or sales. All transactions are coded as derivative exercises (code M) tied to the rights offering.
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*
Buczkowski Michelle

(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)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Administration Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
07/21/2026
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 Stock07/21/2026M(1)2,585A$5.4861,827D
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
Subscription Rights (right to buy)$5.4807/21/2026M(1)2,585 (1)07/21/2026Common Stock2,585$00D
Warrant (right to buy)$5.4807/21/2026M(1)1,134 (1)(2) (2)Common Stock1,134$01,134D
Explanation of Responses:
1. Represents the conversion of a subscription right issued by the Issuer as part of a rights offering that closed on July 21, 2026 (the "Rights Offering"). Each subscription right was exercisable for units that consisted of (i) 1 share of common stock and (ii) 0.4388 of a warrant exercisable to acquire a share of common stock at an exercise price of $5.48 per share.
2. Warrants became exercisable immediately after the Rights Offering closed and expire 10 years later, unless exercised or redeemed earlier. If a warrant is not exercised or redeemed before it expires, it will have no value.
Remarks:
/s/ Sumeet Puri as attorney-in-fact for Michelle Buczkowski08/06/2026
** 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)