{"url_path":"/sec/eose/10-q/2026/item-5","section_key":"item-5","section_title":"Item 5 Other Information","topic":"sec","document":{"doc_type":"10-Q","doc_date":"2026-05-13","source_url":"https://www.sec.gov/Archives/edgar/data/1805077/0001628280-26-034368-index.html","accession_number":"0001628280-26-034368","cik":"0001805077","ticker":"EOSE","issuer_name":"Eos Energy Enterprises, Inc.","edgar_url":"https://www.sec.gov/Archives/edgar/data/1805077/0001628280-26-034368-index.html","primary_entity_key":"0001805077","primary_entity_name":"Eos Energy Enterprises, Inc."},"word_count":516,"has_tables":true,"body_markdown":"Item 5. Other Information\n\nRule 10b5-1 Trading Plans\n\nOn March 12, 2026, Joseph Mastrangelo, Chief Executive Officer, terminated his sell-to-cover Rule 10b5-1 trading plan. No other directors or officers have adopted, terminated or modified any trading plans.\n\n48\n\n[Table of Contents](#i218a01d03bb545c9964edc723a032d0f_7)\n\n(a) Exhibits\n\nIncorporated by Reference\n\nExhibit NumberDescription of DocumentSchedule/FormFile NumberExhibitsFiling Date\n\n3.1\n[Third Amended and Restated Certificate of Incorporation of the Company, as amended](https://www.sec.gov/Archives/edgar/data/1805077/000162828023005647/ex31-thirdamendedandrestat.htm)\nForm 10-KFile No. 001-392913.1February 28, 2023\n\n3.2\n[Certificate of Amendment to the Third Amended and Restated Certificate of Incorporation of the Company, as amended](https://www.sec.gov/Archives/edgar/data/1805077/000180507724000051/secondcertificateofamend.htm)\n\nForm 10-Q\nFile No. 001-392913.2May 14, 2024\n\n3.3\n[Second Amended and Restated Bylaws of the Company](https://www.sec.gov/Archives/edgar/data/1805077/000162828022014885/secondamendedandrestatedby.htm)\nForm 8-KFile No. 001-392913.1May 19, 2022\n\n3.4\n[Series A-1 Preferred Stock Certificate of Designation](https://www.sec.gov/Archives/edgar/data/1805077/000121390024054998/ea020831801ex3-1_eosener.htm)\nForm 8-KFile No. 001-392913.1June 24, 2024\n\n3.5\n[Series A-2 Preferred Stock Certificate of Designation.](https://www.sec.gov/Archives/edgar/data/1805077/000121390024074175/ea021300401ex3-1_eosenergy.htm)\nForm 8-KFile No. 001-392913.1August 30, 2024\n\n3.6\n[Certificate of Designation of Series B-1 Non-Voting Convertible Preferred Stock](https://www.sec.gov/Archives/edgar/data/1805077/000121390024078188/ea021432401ex3-1_eosenergy.htm)\nForm 8-KFile No. 001-392913.1September 12, 2024\n\n3.7\n[Certificate of Designation of Series B-2 Non-Voting Convertible Preferred Stock](https://www.sec.gov/Archives/edgar/data/1805077/000121390024078188/ea021432401ex3-2_eosenergy.htm)\nForm 8-KFile No. 001-392913.2September 12, 2024\n\n3.8\n[Certificate of Designation of Series B-3 Non-Voting Convertible Preferred Stock](https://www.sec.gov/Archives/edgar/data/1805077/000121390024094161/ea021975701ex3-1_eosenergy.htm)\nForm 8-KFile No. 001-392913.1November 4, 2024\n\n3.9\n[Certificate of Designation of Series B-4 Non-Voting Convertible Preferred Stock](https://www.sec.gov/Archives/edgar/data/1805077/000121390025006768/ea022872901ex3-1_eos.htm)\nForm 8-KFile No. 001-392913.1January 27, 2025\n\n10.1\n[Second Amendment to Loan Guarantee Agreement, dated February 13, 2026, by and between Eos Energy Enterprises, Inc. and the United States Department of Energy](https://www.sec.gov/Archives/edgar/data/1805077/000162828026008648/doe-secondamendmenttolga.htm)\nForm 8-KFile No. 001-3929110.1February 17, 2026\n\n31.1*\n[Certification of Chief Executive Officer pursuant to Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002](exhibit311-51326.htm)\n\n31.2*\n[Certification of Chief Financial Officer pursuant to Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002](exhibit312-51326.htm)\n\n32*\n[Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002](exhibit32-51326.htm)\n\n101.INSXBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.\n\n101.SCHXBRL Taxonomy Extension Schema Document\n\n101.CALXBRL Taxonomy Extension Calculation Linkbase Document\n\n49\n\n[Table of Contents](#i218a01d03bb545c9964edc723a032d0f_7)\n\nIncorporated by Reference\n\nExhibit NumberDescription of DocumentSchedule/FormFile NumberExhibitsFiling Date\n\n101.DEFXBRL Taxonomy Extension Definition Linkbase Document\n\n101.LABXBRL Taxonomy Extension Label Linkbase Document\n\n101.PREXBRL Taxonomy Extension Presentation Linkbase Document\n\n104\nCover page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)\n\n___________________________\n\n*Filed herewith.\n\n#    Portions of this exhibit have been omitted pursuant to Item 601(b)(10) of Regulation S-K because they are both (i) not material and (ii) contain the type of information that the Company customarily and actually treats as private or confidential.\n\n50\n\n[Table of Contents](#i218a01d03bb545c9964edc723a032d0f_7)\n\nSIGNATURES\n\nPursuant 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, thereunto duly authorized.\n\nEOS ENERGY ENTERPRISES, INC.\n\nDate: May 13, 2026\nBy:/s/ Joseph Mastrangelo\n\nName:Joseph Mastrangelo\n\nTitle:Chief Executive Officer and Director\n(Principal Executive Officer)\n\nDate: May 13, 2026\nBy:/s/ Nathan Kroeker\n\nName:Nathan Kroeker\n\nTitle:Interim Chief Financial Officer\n(Principal Financial Officer)\n\n51"}