Eos Energy Enterprises, Inc. filed its Form 10-Q for the quarterly period ended September 30, 2026 with the U.S. Securities and Exchange Commission on November 5, 2026, reporting condensed consolidated financial results and balance sheet data for the three and nine months ended September 30, 2026.

Key Highlights

  • Total assets of $1,068,485 thousand as of September 30, 2026, up from $885,197 thousand as of December 31, 2025, according to the filing.
  • Cash and cash equivalents of $271,162 thousand as of September 30, 2026, compared to $567,992 thousand at December 31, 2025.
  • Investment in joint venture of $297,642 thousand appeared on the September 30, 2026 balance sheet, with no comparable balance at December 31, 2025.
  • Total liabilities decreased to $1,064,751 thousand from $1,762,517 thousand at December 31, 2025, driven in part by a decline in warrants liabilities.
  • Warrants liability fell to $57,616 thousand and warrants liability - related party fell to $135,750 thousand, from $313,253 thousand and $470,715 thousand, respectively, at December 31, 2025.
  • Long-term debt stood at $546,547 thousand as of September 30, 2026, down from $662,467 thousand at December 31, 2025.
  • 366,363,999 shares of common stock were outstanding as of November 3, 2026, the filing disclosed.

Eos Energy Balance Sheet Changes: September 30, 2026 vs. December 31, 2025

According to the filing, Eos Energy Enterprises, Inc. (NASDAQ:EOSE) reported total assets of $1,068,485 thousand as of September 30, 2026, an increase from $885,197 thousand at December 31, 2025. The company's current assets declined to $514,041 thousand from $708,480 thousand, with cash and cash equivalents falling to $271,162 thousand from $567,992 thousand over the same period. Restricted cash increased to $57,923 thousand from $34,636 thousand, and inventory grew to $86,404 thousand from $59,026 thousand.

A notable addition to the balance sheet was an investment in joint venture of $297,642 thousand, which carried no comparable balance at December 31, 2025. Property, plant and equipment, net also increased significantly, to $190,515 thousand from $114,415 thousand, the filing stated. The grant receivable, net rose to $39,308 thousand from $11,028 thousand. These increases contributed to the overall growth in total assets despite the decline in cash.

On the liabilities side, the filing reported total liabilities of $1,064,751 thousand as of September 30, 2026, compared to $1,762,517 thousand at December 31, 2025. The reduction was primarily reflected in long-term liabilities, which fell to $909,563 thousand from $1,618,977 thousand. Combined warrants liabilities, including the related-party component, dropped to $193,366 thousand in total from $783,968 thousand at year-end 2025. Notes payable - related party declined to $109,210 thousand from $150,427 thousand. The company is classified as a non-accelerated filer and is not an emerging growth company, according to the filing.

What Was Disclosed

Eos Energy Enterprises filed a 10-Q for the quarter ended September 30, 2026, disclosing balance sheet data showing total assets of $1,068,485 thousand, a new joint venture investment of $297,642 thousand, reduced warrants liabilities, and 366,363,999 shares outstanding as of November 3, 2026.