Eos Energy (EOSE) elevates grant-winning exec to lead commercial push
Rhea-AI Filing Summary
Eos Energy Enterprises, Inc. (EOSE) announced a commercial leadership transition, appointing Michelle Buczkowski as Chief Commercial Officer effective August 24, 2026, while current CCO Nathan Kroeker will remain through October 20, 2026 to support an orderly transition before leaving the company.
As part of the change, Buczkowski’s annual base salary increased from $385,000 to $440,000 and her target annual short-term incentive was set at 100% of base salary, with other compensation terms largely unchanged. Eos highlighted her role in securing a $24 million Pennsylvania grant for manufacturing expansion and her prior energy-sector leadership. A press release with further details was publicly issued and furnished as an exhibit.
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Filing Explained
Buczkowski leads the unified commercial organization while Kroeker remains through October 20, 2026; separation terms are not finalized.
The Form 8-K reports a consolidated commercial organization under Buczkowski, bringing sales, business development, government affairs, marketing, and communications into one reporting structure. Kroeker remains through
In practical terms, Buczkowski now has responsibility for the commercial process from initial customer engagement through order intake and revenue conversion. The filing does not establish any additional separation payment or other completed obligation: those terms remain unresolved.
The filing says that if Eos enters a separation agreement with Kroeker, its material terms will be disclosed in an amendment to this report.
8-K Event Classification
3 items: 5.02, 7.01, 9.01
3 items
Item 5.02
Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers
Governance
Key personnel changes including departures, elections, or appointments of directors and executive officers.
Item 7.01
Regulation FD Disclosure
Disclosure
Material non-public information disclosed under Regulation Fair Disclosure, often investor presentations or guidance.
Item 9.01
Financial Statements and Exhibits
Exhibits
Financial statements, pro forma financial information, or exhibit attachments filed with this report.
Key Figures
Former base salary: $385,000 per year
New base salary: $440,000 per year
Target annual short-term incentive: 100% of annual base salary
+3 more
6 metrics
Former base salary
$385,000 per year
Michelle Buczkowski’s annual base salary before becoming Chief Commercial Officer
New base salary
$440,000 per year
Michelle Buczkowski’s annual base salary effective August 24, 2026 as Chief Commercial Officer
Target annual short-term incentive
100% of annual base salary
Target bonus opportunity for Michelle Buczkowski as Chief Commercial Officer
Pennsylvania grant
$24 million
Grant secured by Michelle Buczkowski supporting Eos’ manufacturing expansion
Capital and financing commitments
Over $2 billion
Financing work led by Nathan Kroeker including the Cerberus Delayed Draw Term Loan and DOE Loan Guarantee
Transition end date
October 20, 2026
Date through which Nathan Kroeker will remain to complete the leadership transition
Key Terms
long-duration energy storage, Znyth™ technology, Department of Energy Loan Guarantee, Delayed Draw Term Loan, +1 more
5 terms
long-duration energy storage technical
"providing zinc- based long-duration energy storage (LDES) systems sourced"
Long-duration energy storage is technology that can store large amounts of electricity for many hours to days and release it when needed, like a very large rechargeable battery that can power a neighborhood through the night or during multi-day cloudy periods. It matters to investors because it enables more reliable use of wind and solar, reduces the need for backup power plants, creates new revenue opportunities from capacity and grid services, and can change the economics of energy projects and utilities.
Znyth™ technology technical
"BESS features the innovative Znyth™ technology, a proven chemistry"
Department of Energy Loan Guarantee financial
"including the Cerberus Delayed Draw Term Loan and the Department of Energy Loan Guarantee"
Delayed Draw Term Loan financial
"including the Cerberus Delayed Draw Term Loan and the Department"
A delayed draw term loan is a financing agreement that lets a borrower take one or more lump-sum loans from a lender at agreed future dates within a set time window instead of receiving all funds up front. It matters to investors because it changes when and how much debt a company will carry, affecting cash flexibility, interest costs and risk exposure—think of it like an approved credit line you only tap when you need cash for a project.
backlog financial
"and grew the Company’s order backlog and opportunity pipeline."
A backlog is the amount of work or orders that a company has received but hasn't completed yet. It’s like a restaurant with many dishes to serve; the backlog shows how many orders are still waiting to be finished. It matters because a large backlog can indicate strong demand or potential delays in delivering products or services.
FAQ
What leadership change did EOSE announce for its commercial organization?
Eos Energy Enterprises appointed Michelle Buczkowski as Chief Commercial Officer, effective August 24, 2026. Nathan Kroeker will remain with the company through October 20, 2026 to support a transition and will then depart.
How did EOSE change Michelle Buczkowski’s compensation in connection with her new role?
Effective August 24, 2026, Eos increased Buczkowski’s annual base salary from $385,000 to $440,000 and set her target annual short-term incentive opportunity at 100% of her base salary. Other elements of her compensation remain substantially unchanged.
When will Nathan Kroeker leave EOSE?
Nathan Kroeker will stay at Eos Energy Enterprises through October 20, 2026 to help ensure an orderly transition of commercial responsibilities and is expected to depart the company following that transition period.
What prior achievements did EOSE highlight for new CCO Michelle Buczkowski?
Eos noted that Buczkowski secured a $24 million Pennsylvania grant supporting the company’s manufacturing expansion, built the workforce pipeline for that facility, and led engagement that helped position Eos for the Golden Dome program, contributing to a meaningful share of its commercial pipeline.
What financing work did Nathan Kroeker lead during his tenure at EOSE?
As Chief Financial Officer, Kroeker led financing efforts that secured over $2 billion in capital and financing commitments, including the Cerberus Delayed Draw Term Loan and a Department of Energy Loan Guarantee, which supported recapitalizing the business during its manufacturing scale-up.
AI-generated analysis. How Rhea-AI works. Not financial advice.
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 8-K
CURRENT REPORT
PURSUANT TO SECTION 13 OR 15(d) OF THE
SECURITIES EXCHANGE ACT OF 1934
Date of Report (Date of earliest event reported): August 24, 2026
(Exact name of registrant as specified in its charter)
(State or other jurisdiction of incorporation) | (Commission File Number) | (IRS Employer Identification No.) | ||||||||||||
(Address of principal executive offices, including zip code)
Registrant’s telephone number, including area code: (732 ) 225-8400
N/A
(Former name or former address, if changed since last report)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) | |||||
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) | |||||
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) | |||||
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) | |||||
Securities registered pursuant to Section 12(b) of the Act:
Title of each class | Trading Symbol(s) | Name of each exchange on which registered | ||||||||||||
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).
Emerging growth company ☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐
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Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.
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. In connection with this organizational change, effective August 24, 2026, Michelle Buczkowski, the Company's Chief Administration Officer, was appointed Chief Commercial Officer. 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. In addition, Ms. Buczkowski's target annual short-term incentive opportunity was increased to 100% of her annual base salary. Other than the foregoing changes, her compensation arrangements remain substantially unchanged.
Item 7.01 Regulation FD Disclosure
On August 25, 2026, the Company issued a press release announcing the appointment of Michelle Buczkowski as Chief Commercial Officer and the planned departure of Nathan Kroeker following a transition period. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.
The information furnished under this Item 7.01 and in the accompanying Exhibit 99.1 shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act regardless of any general incorporation in such filing, unless expressly incorporated by specific reference in such filing.
Item 9.01 Financial Statement and Exhibits.
(d) Exhibits
Exhibit Number | Description of Document | |||||||
99.1 | Press Release dated August 25, 2026 announcing the appointment of Michelle Buczkowski as Chief Commercial Officer and the planned departure of Nathan Kroeker | |||||||
104 | Cover page of this Current Report on Form 8-K formatted in Inline XBRL | |||||||
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SIGNATURE
Pursuant 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 hereunto duly authorized.
EOS ENERGY ENTERPRISES, INC. | |||||||||||
Dated: August 25, 2026 | By: | /s/ Alessandro Lagi | |||||||||
Name: | Alessandro Lagi | ||||||||||
Title: | Chief Financial Officer | ||||||||||
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Eos Energy Enterprises Appoints Michelle Buczkowski as Chief Commercial Officer Nathan Kroeker to depart following transition period PITTSBURGH, PA – August 25, 2026 – 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 Michelle Buczkowski as Chief Commercial Officer, effective August 24, 2026. Buczkowski succeeds Nathan Kroeker, who will leave the Company on October 20, 2026, following a planned transition period. Federal, state, and local energy policy influences every commercial conversation. A customer evaluating a storage project weighs incentives alongside price and delivery. Sales, business development, government affairs, marketing, and communications now report to Buczkowski, who owns the path from first customer engagement through order intake and revenue conversion. Buczkowski has served as Chief Administrative Officer since November 2025, leading government affairs, marketing, communications, and human resources. She secured the $24 million Pennsylvania grant behind the Company’s manufacturing expansion, built the workforce pipeline that staffs it, and led the engagement that positioned Eos for selection into the Golden Dome program. The utility, regulator, and agency relationships she built sit behind a meaningful share of the Company’s commercial pipeline. Buczkowski brings over 20 years of energy-sector leadership to the position. Prior to joining Eos, she held leadership roles at Duquesne Light Company and Consol Energy/CNX Resources, working with utilities, regulators, and agencies across regulated utility and energy production businesses. “Michelle turns relationships into results,” said Joe Mastrangelo, Chief Executive Officer of Eos. “She secured the state support behind our factory, built the team that staffs it, and opened the federal channel that led to our Department of War partnership. I also want to thank Nathan Kroeker, who strengthened our balance sheet when it mattered most and hands over a commercial organization built to deliver.” “Eos sits where energy security, domestic manufacturing, and grid demand meet,” said Buczkowski. “Utilities and data center developers are asking for storage they can site and service in the United States, and federal policy is pointed the same way. My job is converting that into orders, revenue, and customer relationships that last. We have the technology, the factory, and the team. The work ahead is execution.” Leadership Transition Kroeker joined Eos in January 2023 as Chief Financial Officer and became Chief Commercial Officer in 2025. As Chief Financial Officer, he led the financing work that secured over $2 billion in capital and financing commitments, including the Cerberus Delayed Draw Term Loan and the Department of Energy Loan Guarantee, re-capitalizing the business and strengthening the
balance sheet through the Company’s manufacturing scale-up. As Chief Commercial Officer, he expanded engagement with developers, utilities, hyperscalers, and strategic partners and grew the Company’s order backlog and opportunity pipeline. “It has been a privilege to be part of Eos as we’ve positioned the Company to capture the market opportunity, and deliver on its growth plans,” said Kroeker. “I am proud of what this team has built and confident in where it is going. Eos has the foundation, the customers, and the leadership to execute on what is ahead. I have had the pleasure of working alongside Michelle for the past 2 years and I’m confident that she is the right person to lead the Commercial organization going forward.” Buczkowski and Kroeker will work together through October 20, 2026, to complete the transition. About Eos Energy Enterprises Eos is accelerating the shift to American energy independence with positively ingenious solutions that transform how the world stores power. The Company’s BESS features the innovative Znyth™ technology, a proven chemistry with readily available non-precious earth components, that is the pre-eminent safe, non-flammable, secure, stable, and scalable alternative to conventional technology. The Company’s BESS is ideal for utility-scale, microgrid, commercial, and industrial long-duration energy storage applications (i.e., 4 to 16+ hours), and provides customers with significant operational flexibility to effectively address current and future increased grid demand and complexity. For more information about Eos (NASDAQ: EOSE), visit eose.com. Contacts Investors: ir@eose.com Media: media@eose.com Forward Looking Statements This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements include, but are not limited to, statements regarding Eos’ leadership transition, commercial strategy, growth opportunities, customer demand, order intake, revenue generation, commercial pipeline, opportunity pipeline, backlog conversion, future operating performance, and other statements that are not historical facts. The words "anticipate," "believe," "continue," "could," "estimate," "expect," "intend," "may," "might," "plan," "possible," "potential," "predict," "project," "should," "would" and similar expressions may identify forward-looking statements, but the absence of these words does not mean that a statement is not forward-looking. Forward-looking statements are based on our management’s current expectations and assumptions and are subject to risks and uncertainties that could cause actual results to differ materially from those expressed or implied by such statements.
Important factors that could cause actual results to differ materially include, among others, risks relating to Eos’ ability to execute its commercial strategy, convert opportunities and backlog into revenue, manage growth, retain key personnel, maintain customer and strategic relationships, secure financing, scale manufacturing operations, comply with applicable laws and regulations, and other risks described in Eos’ filings with the Securities and Exchange Commission (“SEC”). Additional information concerning these and other risk factors is contained in the Company’s filings with the SEC, including its most recent Annual Report on Form 10-K and subsequent Quarterly Reports on Form 10-Q and Current Reports on Form 8-K. Forward-looking statements speak only as of the date they are made. Should one or more of these risks or uncertainties materialize or should any of our assumptions prove incorrect, actual results may vary in material respects from those projected in these forward-looking statements. Readers are cautioned not to put undue reliance on forward-looking statements, and, except as required by law, the Company assumes no obligation and does not intend to update or revise these forward-looking statements, whether as a result of new information, future events, or otherwise.