Ameresco Announces Departure of Chief Financial Officer (Form 8-K)

Ameresco Announces Departure of Chief Financial Officer

FRAMINGHAM, MA, August 19, 2026 - Ameresco, Inc., (NYSE: AMRC), a leading energy infrastructure company, today announced that, effective September 25, 2026, Mark Chiplock has resigned as Chief Financial Officer to accept a CFO position at a private equity-owned company in a different industry.

"We appreciate the significant contributions Mark has made to our company during his tenure with us, and the strong financial team that he has built and mentored. Mark has been a valuable member of our executive leadership, and we are grateful for his leadership and wish him continued success in his new opportunity," said George Sakellaris, CEO.

Mark will continue to serve as CFO through September 25, 2026, and will support an orderly transition of his responsibilities.

Ameresco is pleased to reiterate its guidance for full year 2026 revenue of $2.0 billion to $2.2 billion, Adjusted EBITDA of $250 million to $270 million, and Non-GAAP EPS of $1.15 to $1.35.

The company has begun a search to identify its next Chief Financial Officer who will join us in leading the company during this next transformation period of growth.

About Ameresco, Inc.

Ameresco, Inc. (NYSE: AMRC) is a leading energy infrastructure company delivering integrated solutions to create reliable power and modernize infrastructure. The company's Power Infrastructure business integrates energy resources across behind-the-meter and utility-scale systems. Its Buildings & Public Infrastructure business modernizes the built environment with smart, connected solutions that optimize performance and enhance resilience. Ameresco is a trusted full lifecycle partner, delivering over $15 billion in solutions and contracting over 5 GW of energy resources since its founding in 2000. Headquartered in Massachusetts, Ameresco serves public and private sector customers across North America and Europe. Learn more at www.ameresco.com.