[8-K] Eos Energy Enterprises, Inc. Reports Material Event

Rhea-AI Filing Summary

Eos Energy Enterprises, Inc. filed an 8-K announcing it furnished a press release with financial results for the quarter ended September 30, 2025. The press release is included as Exhibit 99.1.

The company states the information furnished under Item 2.02 and in Exhibit 99.1 is not deemed “filed” under the Exchange Act and is not incorporated by reference unless expressly stated. The filing also lists Exhibit 104 for the cover page formatted in Inline XBRL.

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): November 5, 2025

EOS ENERGY ENTERPRISES, INC.

(Exact name of registrant as specified in its charter)

Delaware

001-39291

84-4290188

(State or other jurisdiction of incorporation)

(Commission File Number)

(IRS Employer Identification No.)

3920 Park Avenue

Edison, New Jersey 08820

(Address of principal executive offices, including zip code)

Registrant’s telephone number, including area code: (732) 225-8400

N/A

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐			Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐			Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐			Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐			Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading Symbol(s)

Name of each exchange on which registered

Common stock, par value $0.0001 per share

EOSE

The Nasdaq Stock Market LLC

Warrants, each exercisable for one share of common stock

EOSEW

The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

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Item 2.02 Results of Operations and Financial Condition

On November 05, 2025, Eos Energy Enterprises, Inc. (the “Company”) issued a press release announcing its financial results for the quarter ended September 30, 2025. A copy of the press release is furnished herewith as Exhibit 99.1.

The information furnished under this Item 2.02 and in the accompanying Exhibit 99.1 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference in such filing.

Item 9.01 Financial Statement and Exhibits.

(d) Exhibits

Exhibit Number						Description of Document
99.1						Press release announcing financial results, dated November 05, 2025
104						Cover page of this Current Report on Form 8-K formatted in Inline XBRL

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SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

			EOS ENERGY ENTERPRISES, INC.
Dated: July 30, 2025			By:			/s/ Nathan Kroeker
						Name:			Nathan Kroeker
						Title:			Interim Chief Financial Officer

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FAQ

What did EOSE announce in this 8-K?

Eos Energy Enterprises furnished a press release with financial results for the quarter ended September 30, 2025, as Exhibit 99.1.

When was the 8-K event date for EOSE?

The earliest event date disclosed is November 5, 2025.

Which exhibit contains EOSE’s Q3 2025 results?

Exhibit 99.1 contains the press release announcing the financial results.

Is the EOSE press release considered 'filed' under the Exchange Act?

No. The company states the information in Item 2.02 and Exhibit 99.1 is furnished, not deemed filed.

What other exhibit is referenced in the 8-K?

Exhibit 104, which is the cover page formatted in Inline XBRL.

What is EOSE’s trading symbol and exchange?

EOSE trades on The Nasdaq Stock Market LLC; its warrants trade as EOSEW.