Capstone Partners advised NESTEC—a leading provider of Air Pollution Control systems for industrial applications—on its partnership with Angeleno Group. The transaction closed in February 2026, and terms of the deal were not disclosed.
With headquarters in Pen Argyl, Pennsylvania, NESTEC, Inc., founded in 2005, is an industrial air pollution control (APC) company that specializes in system service, rebuilds, and upgrades, as well as the design and engineering of OEM systems. The company is a leading provider of new, replacement, and refurbished air emission control systems such as thermal oxidation systems and wet electrostatic precipitators for a wide range of industries and applications, including wood products, ethanol, can manufacturing, food processing, insulation manufacturing, specialty chemicals, electric vehicle battery production, solid fuel boilers, oil & gas, packaging, coating, printing, automotive, metalized film, and for semiconductor fabrication. For more information, visit NESTEC here.
We selected Capstone due to their experience in the sector and track record of success with founder-owned businesses. They took the time to listen and fully understand our goals and objectives for finding the right partner and lead managed a process reflecting that. Their marketing campaign and strategy led to strong interest in our company, and they proactively advised us throughout the process until closing. We appreciate the hard work and long hours that went into a robust effort and are grateful to the Capstone team for helping us achieve a stellar outcome for our shareholders and employees.
“It was a pleasure to represent the team at NESTEC,” notes Ted Polk, Managing Director and co-head of Capstone’s Industrials banking team. “Given their best-in-class technological capabilities, the business is operating with a ton of momentum and has a very bright future. We wish them well!”
Founded in 2001, Angeleno Group is a pioneer in providing growth capital for clean energy and climate solutions companies. Angeleno Group has become one of the United States’ longest-standing dedicated clean energy and sustainability focused investment firms, making investments on a global basis. The firm invests in high-growth, well-managed, innovative businesses with proven technologies and established customer-traction. The firm invests in a range of deal types, with a strategy that is sector-focused and research-driven. Angeleno Group is headquartered in Los Angeles, California. For more information, visit Angeleno Group here.
The investment banking professionals on Capstone Partners’ dedicated Industrials Team work with leading middle market companies operating in the Environmental Health & Safety market to advise with their strategic decision-making in order to maximize financial outcomes at every stage of the business lifecycle. Our firm has developed a full suite of corporate finance solutions, including M&A advisory, debt advisory, financial advisory, and equity capital financing to help privately owned businesses and private equity firms address any need, ranging from growth and financial or operational advisement to an ultimate exit transaction. To learn more about this transaction, or about the benefits of starting a relationship with our Industrials Banking Team, contact us here.
