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Get filing alertsEos Energy appoints cybersecurity expert Haiyan Song to Board, names Marie Martin CLO
Filed July 9, 2026 · Period ending July 8, 2026 · ~1 min read
Key Changes
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Haiyan Song appointed as independent Class III director (term through 2029), bringing 30+ years in software, cloud, and cybersecurity from NetApp, F5, Splunk, and HPE to strengthen Eos' technology strategy as manufacturing scales.
Item 5.02 — Departure of Directors or Certain Officers; Election of Directors; Compensation verify on EDGAR → -
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Marie Batz Martin named Chief Legal Officer effective July 13, 2026, with 20+ years of legal and compliance leadership at global industrial firms; current CLO Michael Silberman transitions out by September 11, 2026.
Exhibit 99.1 view on EDGAR → -
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Board reshuffling: Greg Nixon resigned as preferred stock director; Nathaniel Fick moved from Class III independent director to preferred stock director seat; total Board size and composition unchanged.
Item 5.02 — Departure of Directors or Certain Officers; Election of Directors; Compensation verify on EDGAR →
Summary
Eos Energy disclosed two leadership appointments on July 9, 2026. The company added Haiyan Song to its Board as an independent Class III director, filling a seat vacated when Nathaniel Fick transitioned to a preferred stock director role (replacing the departing Greg Nixon).
Song's three decades of experience leading enterprise technology, cloud, and cybersecurity businesses at NetApp, F5, Splunk, and HPE align with Eos' need for software and data expertise as it scales U.S. manufacturing of zinc-based energy storage systems.
Separately, Eos named Marie Batz Martin as Chief Legal Officer effective July 13, 2026, succeeding Michael Silberman, who will remain through mid-September to support the transition. Martin brings over 20 years of legal, compliance, and corporate governance leadership at global industrial companies, most recently as Global Vice President and Chief Compliance Officer at Coherent Corp. Both appointments strengthen Eos' leadership bench in technology strategy and legal/compliance functions as the company expands commercial deployments. The Board changes are procedural—total size and the number of independent and preferred stock directors remain unchanged.
Section-by-Section Diff
Event · Item 5.02 — Departure of Directors or Certain Officers; Election of Directors; Compensation
Item 5.02 — Departure of Directors or Certain Officers; Election of Directors; Compensation filed; see Key Changes for terms.
Added in current filing · verify on EDGAR →
On July 9, 2026, the Board appointed Haiyan Song, age 60, to the Board. 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.
Haiyan Song was appointed as a Class III director on July 9, 2026, succeeding Fick in that class. She will serve until the 2029 annual meeting and will receive standard non-employee director compensation: $50,000 annual cash retainer plus $150,000 in restricted stock units vesting over one year or until the next annual meeting.
Show 2 minor / wording changes
Added in current filing · verify on EDGAR →
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.
Greg Nixon resigned as a preferred stock director effective July 8, 2026, citing a desire to focus on other business ventures. Nathaniel Fick succeeded him in that preferred stock director seat.
Added in current filing · verify on EDGAR →
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.
Nathaniel Fick transitioned from a Class III director to a preferred stock director on July 8, 2026, filling the seat vacated by Nixon. He continues to serve on the Nominating and Corporate Governance Committee and will not be compensated for his board service per his employer's policies.
Event · Item 8.01 — Other Events
Eos Energy announced leadership appointments and resignations via press release.
Added in current filing · verify on EDGAR →
On July 9, 2026, the Company issued a press release announcing the appointments and resignations described in Item 5.02.
The company disclosed leadership changes through a press release. The specific details of which officers were appointed or resigned are referenced in Item 5.02, which is not included in the provided filing text. Without access to Item 5.02 or Exhibit 99.1, the nature and materiality of these changes cannot be determined.
Event · Exhibit 99.1
Eos appoints cybersecurity expert Haiyan Song to Board, names Marie Martin Chief Legal Officer effective July 13, 2026.
Added in current filing · view on EDGAR →
Eos Energy Enterprises, Inc. (NASDAQ: EOSE) (“Eos” or the “Company”), America’s leading innovator in designing, manufacturing, and providing zinc-based long- duration energy storage (LDES) systems sourced and manufactured in the United States, today announced the appointment of Haiyan Song to its Board of Directors
Eos appointed Haiyan Song to its Board of Directors as an independent director effective July 9, 2026. Song brings over three decades of experience leading software, cloud, cybersecurity, data, and enterprise technology businesses, most recently as Executive Vice President of NetApp's CloudOps business, with prior senior roles at F5, Splunk, and Hewlett Packard Enterprise. Her appointment strengthens Eos' software, data, and cybersecurity strategy as the company scales U.S. manufacturing and commercial deployments.
Added in current filing · view on EDGAR →
Eos also announced the appointment of Marie Batz Martin as Chief Legal Officer effective July 13, 2026, bringing more than 20 years of legal, compliance and corporate governance leadership at global industrial and manufacturing companies to a business moving fast on multiple fronts. Michael Silberman, Eos’ current Chief Legal Officer, will remain with the Company as a non-executive employee through September 11, 2026, in support of the planned smooth transition.
Eos appointed Marie Batz Martin as Chief Legal Officer effective July 13, 2026. Martin brings over 20 years of legal, compliance, and corporate governance experience at global industrial companies, most recently as Global Vice President and Chief Compliance Officer at Coherent Corp. The current Chief Legal Officer, Michael Silberman, will remain with the company as a non-executive employee through September 11, 2026, to support the transition.
Show 1 minor / wording change
Added in current filing · view on EDGAR →
As part of the Board transition, Greg Nixon has elected to step down from his role as a preferred stock director. Nate Fick, who joined the Board in March 2026, will transition from his independent director seat to the preferred stock director seat. Song will join the Board as an independent director, filling the seat vacated by Fick, effective July 9, 2026. Following these changes, the size of the Board, the number of independent directors, and the number of preferred stock directors remain unchanged.
Greg Nixon stepped down from his preferred stock director role, while Nate Fick (who joined the Board in March 2026) transitioned from an independent director seat to the preferred stock director seat. Song fills the independent director seat vacated by Fick. The total Board size and composition (number of independent and preferred stock directors) remain unchanged.
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Figures/quotes linked to EDGAR · Narrative written by AI · Jul 12, 2026 · How we verify