Key Takeaways
- • Cook & Boardman Group, backed by Platinum Equity since 2023, acquired substantially all assets of Assurance Media LLC, a Wilmington, Delaware-based systems integrator founded in 2009, with financial terms undisclosed.
- • Assurance Media specializes in structured cabling, audiovisual systems, and premise security for customers across Delaware and Pennsylvania; the business will continue operating under its existing name with customer relationships unchanged.
- • This represents Cook & Boardman's seventeenth acquisition since Platinum Equity acquired its majority stake in 2023, demonstrating an active consolidation strategy in the integrated access and security solutions market.
- • The acquisition expands Cook & Boardman's nationwide capabilities in systems integration, low-voltage cabling, physical security, and managed IT solutions across its network of 80+ U.S. locations.
- • Mark Stellini, Assurance Media's former owner, will continue as General Manager post-acquisition, supporting operational continuity and integration with Cook & Boardman's broader service platform.
Summary
Cook & Boardman Group LLC announced the acquisition of substantially all assets of Assurance Media LLC on April 1, 2026, expanding its footprint in integrated access and security solutions. Assurance Media, founded in 2009 and headquartered in Wilmington, Delaware, is a systems integrator specializing in structured cabling, audiovisual systems, and premise security services serving design and construction clients across Delaware and Pennsylvania. Financial terms of the transaction were not disclosed.
The acquisition represents Cook & Boardman's seventeenth completed transaction under Platinum Equity's ownership, which acquired a controlling stake in the Winston-Salem-based company in 2023. Littlejohn & Co., LLC remains a significant minority shareholder. Cook & Boardman, founded in 1955, operates more than 80 locations nationwide and provides a comprehensive portfolio spanning commercial doors, electronic access control systems, wireless networking, low-voltage cabling, audiovisual integration, and managed IT solutions across healthcare, education, government, hospitality, and industrial sectors.
David Eisner, CEO of Cook & Boardman, emphasized the strategic fit: "We are excited to welcome Assurance Media to the Cook & Boardman family. Over the years Assurance Media has earned a strong reputation across Delaware and the nearby areas, built on outstanding customer service and a solutions-driven approach." Mark Stellini, Assurance Media's former owner and future General Manager, noted the acquisition enables the company to "broaden our reach and bring that same expertise and commitment to a wider group of customers."
Operationally, Assurance Media will maintain its brand identity and customer relationships, with no changes to customer contacts or service continuity. This acquisition strategy reflects Cook & Boardman's broader expansion under private equity ownership, systematically consolidating regional systems integrators to build scale and enhance cross-selling capabilities across its integrated platform.
The acquisition represents Cook & Boardman's seventeenth completed transaction under Platinum Equity's ownership, which acquired a controlling stake in the Winston-Salem-based company in 2023. Littlejohn & Co., LLC remains a significant minority shareholder. Cook & Boardman, founded in 1955, operates more than 80 locations nationwide and provides a comprehensive portfolio spanning commercial doors, electronic access control systems, wireless networking, low-voltage cabling, audiovisual integration, and managed IT solutions across healthcare, education, government, hospitality, and industrial sectors.
David Eisner, CEO of Cook & Boardman, emphasized the strategic fit: "We are excited to welcome Assurance Media to the Cook & Boardman family. Over the years Assurance Media has earned a strong reputation across Delaware and the nearby areas, built on outstanding customer service and a solutions-driven approach." Mark Stellini, Assurance Media's former owner and future General Manager, noted the acquisition enables the company to "broaden our reach and bring that same expertise and commitment to a wider group of customers."
Operationally, Assurance Media will maintain its brand identity and customer relationships, with no changes to customer contacts or service continuity. This acquisition strategy reflects Cook & Boardman's broader expansion under private equity ownership, systematically consolidating regional systems integrators to build scale and enhance cross-selling capabilities across its integrated platform.
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