Ameresco, Inc. CFO Resigns Effective Sept 25, 2026

What Happened Ameresco, Inc. (AMRC) filed a Form 8‑K reporting that Mark A. Chiplock, Executive Vice President, Chief Financial Officer and Chief Accounting Officer, submitted his resignation on August 17, 2026, effective September 25, 2026. The filing states Mr. Chiplock is leaving to pursue other professional opportunities and that his resignation was not due to any disagreement with the company’s operations, policies or practices. The company has begun a search for a new Chief Financial Officer. The 8‑K includes a press release dated August 19, 2026, and was furnished under Regulation FD (not filed for Section 18 liability).

Key Details

• Resignation notice received: August 17, 2026; effective date: September 25, 2026.
• Officer leaving: Mark A. Chiplock — Executive VP, CFO and Chief Accounting Officer.
• Reason: Pursuing other professional opportunities; explicitly not due to disagreement with the company.
• Company action: Has commenced a search for a Chief Financial Officer; press release attached to the 8‑K (Exhibit 99.1).

Why It Matters A CFO departure is a material leadership change for investors because it affects financial oversight and planning. The filing indicates an orderly transition (no disagreement) and that Ameresco is actively seeking a replacement, which helps limit uncertainty. Investors should watch for announcements naming an interim or permanent CFO and any related disclosures about financial controls, guidance, or strategy that could follow the hire.