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

Rhea-AI Filing Summary

Eos Energy Enterprises (EOSE) reported that it has satisfied its final performance milestones, specifically Sales Milestone 4 for the Fourth Milestone Test Date, under its amended Credit Agreement. The update was furnished as a Regulation FD disclosure to provide broad, non‑selective communication to the market.

The company attached a press release as Exhibit 99.1 to the report. Meeting these contract-defined milestones indicates compliance with the Credit Agreement’s performance conditions, as described in the filing.

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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): October 31, 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 7.01 Regulation FD Disclosure.

On October 31, 2025, the Company issued a press release announcing, among other matters, the satisfaction of its final performance milestones comprising of Sales Milestone 4 for the Fourth Milestone Test Date, each as defined under the Company’s credit and guaranty agreement, as amended (the “Credit Agreement”), pursuant to the terms thereof. A copy of the Company’s press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

Item 9.01 Financial Statement and Exhibits.

(d) Exhibits

Exhibit Number						Description of Document
99.1						Press release, dated October 31, 2025, issued by Eos Energy Enterprises, Inc. (furnished pursuant to Item 7.01)
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: October 31, 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?

The company announced satisfaction of its final performance milestones, including Sales Milestone 4 for the Fourth Milestone Test Date, under its Credit Agreement.

Which item of the 8-K covers this disclosure for EOSE?

Item 7.01 (Regulation FD Disclosure).

What exhibit is included with EOSE’s filing?

Exhibit 99.1, a press release dated October 31, 2025.

What is the contractual context for the milestones at EOSE?

They are defined under the company’s Credit and Guaranty Agreement, as amended.

What are EOSE’s listed securities and tickers?

Common stock: EOSE; Warrants: EOSEW, both on The Nasdaq Stock Market LLC.