Item 1.01 Entry into a Material Definitive Agreement.

On July 7, 2021, Eos Energy Enterprises, Inc. (the "Company") issued $100,000,000 in aggregate principal amount of the Company's 5%/6% Convertible Senior PIK Toggle Notes due 2026 (the "Notes") to Spring Creek Capital, LLC, a wholly-owned, indirect subsidiary of Koch Industries, Inc. ("Koch") pursuant to that certain Investment Agreement, dated as of July 6, 2021, between the Company and Koch (the "Investment Agreement"). The Investment Agreement contemplated an ability to issue the notes under an indenture to facilitate transferability. As permitted by the Investment Agreement, the Company reissued the Notes in an aggregate principal amount of $102,900,000, including $2,900,000 principal amount of the Notes representing interest previously paid in kind, pursuant to an indenture with Wilmington Trust, National Association, as trustee (the "Indenture"), dated as of April 7, 2022. The terms of the Notes remain the same as under the Investment Agreement, which were previously described in the Company's Current Report on Form 8-K filed on July 7, 2021.

Item 9.01 Financial Statement and Exhibits.



(d) Exhibits

Exhibit
Number               Description of Document

4.1                    Indenture, dated April 7, 2022, between the Company and Wilmington Trust,
                     National Association, as trustee.
4.2                  Form of Note (included in Exhibit 4.1 hereto).
104                  Cover page of this Current Report on Form 8-K formatted in Inline XBRL


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