Cook & Boardman Acquires Assurance Media

Cook & Boardman Group acquired Assurance Media in a deal that closed April 1, 2026. Assurance Media is a Wilmington, Delaware-based security and cabling company that designs, installs, and maintains premise security, audiovisual systems, and structured cabling.

Assurance Media leadership included Mark Stellini, Mimi Stellini, and Jennifer McKenzie. Cook & Boardman Group is a private equity-backed firm specializing in electronic access control equipment, aligning the acquisition with an add-on strategy in security technology services.