Leadership changes at Eos Energy Enterprises, Inc. (2026)

Departing: Nathan Kroeker, Chief Commercial Officer

of the Initial Form 8-K. The Initial Form 8-K reported, among other things, that Nathan Kroeker, the Company's then Chief Commercial Officer, will depart from the Company on October 20, 2026.

Also stated in this filing

• In connection with the transition of his role and pending separation, on September 10, 2026, the Company entered into a separation agreement with Mr. Kroeker (the "Separation Agreement").

Appointed: Michelle Buczkowski, Chief Administration Officer, effective 2026-08-24

In connection with this organizational change, effective August 24, 2026, Michelle Buczkowski, the Company's Chief Administration Officer, was appointed Chief Commercial Officer.

Also stated in this filing

• Chief Commercial Officer Transition On August 24, 2026, Eos Energy Enterprises, Inc. (the "Company") implemented a leadership transition designed to align its commercial operations by bringing sales, business development, government affairs, marketing and communications under a unified commercial organization.
• The appointment also reflects the Company's succession planning efforts and continued focus on commercial execution.
• Nathan Kroeker, the Company's Chief Commercial Officer, will remain with the Company through October 20, 2026 to support an orderly transition and will depart the Company following such transition period.
• It is currently anticipated that Mr. Kroeker will enter into a separation agreement in connection with his departure, the terms of which have not been finalized as of the date of this filing.
• If the Company enters into a separation agreement with Mr. Kroeker, the material terms of such separation agreement will be disclosed in an amendment to this report.
• In connection with Ms. Buczkowski's appointment as Chief Commercial Officer, the Compensation Committee of the Board of Directors approved modifications to her compensation arrangements, effective August 24, 2026.
• Ms. Buczkowski's annual base salary was increased from $385,000 to $440,000.

Departing: Greg Nixon, Director, effective 2026-07-08

On July 8, 2026, Greg Nixon resigned from his role as a preferred stock director of the Board of Directors (the "Board") of Eos Energy Enterprises, Inc. (the "Company"), effective July 8, 2026, to devote more time to other business ventures.

Departing: Nathaniel Fick, Director, effective 2026-07-08

Resignation and Appointment of Nathaniel Fick On July 8, 2026, Nathaniel Fick resigned from his role as a Class III director of the Board, effective July 8, 2026, to accept an appointment as preferred stock director of the Board.

Appointed: Nathaniel Fick

On July 8, 2026, pursuant to the terms of the Series B Preferred Stock (as defined below) of the Company, the holder of the Series B- 1 Convertible Preferred Stock of the Company ("Series B-1 Preferred Stock"), Series B-2 Convertible Preferred Stock of the Company ("Series B-2 Preferred Stock"), Series B-3 Convertible Preferred Stock ("Series B-3 Preferred Stock") and Series B-4 Convertible Preferred Stock of the Company ("Series B-4 Preferred Stock" and, collectively with Series B-1 Preferred Stock, Series B-2 Preferred Stock and Series B-3 Preferred Stock, "Series B Preferred Stock") elected

Appointed: Haiyan Song

On July 9, 2026, the Board appointed Haiyan Song, age 60, to the Board.

Also stated in this filing

• Nathaniel Fick will succeed Mr. Nixon as a preferred stock director of the Board, effective July 8, 2026.
• Haiyan Song will succeed Mr. Fick as a Class III director of the Board, effective July 9, 2026.
• Mr. Fick will continue to serve on the Nominating and Corporate Governance Committee.
• The Company has entered into an indemnification agreement with Mr. Fick on the same basis as each of the Company's other directors.
• This agreement, among other things, requires the Company to indemnify its directors for certain expenses, including attorneys' fees, judgments, fines and settlement amounts incurred by a director in any action or proceeding arising out of their services as one of the Company's directors or any other company or enterprise to which the person provides services at the Company's request.
• Ms. Song will serve as a Class III director, and shall hold office until the Company's 2029 annual meeting, or until her successor is elected and qualified.
• Under the Director Compensation Policy, each Non-Employee director is eligible to receive (i) an annual cash retainer equal to $50,000, payable in equal quarterly installments in arrears, and (ii) an annual equity-based retainer (the "Equity Retainer") with a value of $150,000.

Reported

Mr. Lagi is subject to certain post-termination restrictions, including a 12-month restriction on competition and solicitation of the Company's employees and customers, as well as a perpetual non-disparagement restriction.

Also stated in this filing

• Appointment of Chief Financial Officer On April 30, 2026, Eos Energy Enterprises, Inc. ("Eos" and, together with its subsidiaries, the "Company") announced that, effective June 8, 2026, Alessandro Lagi will be the new Chief Financial Officer of the Company.
• In connection with Mr. Lagi's appointment as Chief Financial Officer, Nathan Kroeker will cease serving as the interim Chief Financial Officer of the Company and will continue to serve as the Company's Chief Commercial Officer.
• Mr. Lagi, 50, served in various roles at Johnson Controls from 2022 to 2026, most recently as Global FP&A and Vector of Growth Finance Vice President at Johnson Controls and previously served as CFO and Finance VP of APAC (Asia Pacific) and of EMEALA (Europe, Middle East, Africa and Latin America).
• Prior to that, from 2019 to 2022 Mr. Lagi worked at Baker Hughes in roles of increasing responsibility, most recently serving as Oil Field Equipment Global CFO and Finance VP and from 2016 to 2019 Mr. Lagi served as Latin America CFO for BHGE.
• Mr. Lagi holds a Laurea Degree in Management and Finance with a major in Business Management at the University of Economics of Florence.

Reported

The Employment Agreement also includes customary confidentiality and assignment of intellectual property obligations (which are perpetual), as well as non-competition and non-solicitation restrictions (both of employees and business relationships) that each continue for 12 months following termination of employment.

Also stated in this filing

• Employment Agreement with Chief Administration Officer On March 30, 2026, EOS Energy Enterprises, Inc. (the "Company") and certain of its subsidiaries entered into an employment agreement with Michelle Buczkowski, the Company's Chief Administration Officer (the "Employment Agreement").
• The Employment Agreement supersedes the prior Offer of Employment Letter entered into with Ms. Buczkowski and provides for Ms. Buczkowski to receive an annual base salary of $385,000.
• Ms. Buczkowski will also be eligible for a year-end target bonus of 75% of her annual base salary under the short-term incentive plan, with the actual bonus to be determined based on performance.
• A dditionally, the Employment Agreement confirms that Ms. Buczkowski will be eligible for annual long-term incentive grants.