Security Firm Assurance Media Acquired by Private Equity-Backed Cook & Boardman

The deal closed on April 1, but the terms were not disclosed.

Apr. 15, 2026 at 8:57pm

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A photorealistic studio still life featuring a sleek security camera lens and keypad control panel arranged elegantly on a clean, monochromatic background, representing the abstract concepts of corporate security and technological innovation.The acquisition of a security technology firm signals ongoing consolidation in the industry as private equity firms seek to expand their capabilities.Wilmington Today

Assurance Media, a security and cabling company based in Wilmington, Delaware, has been acquired by Cook & Boardman Group, a private equity-backed firm that specializes in electronic access control equipment. The deal closed on April 1, but the financial terms were not disclosed.

Why it matters

The acquisition of Assurance Media by Cook & Boardman Group, a private equity-backed firm, signals ongoing consolidation in the security and technology services industry. As private equity firms continue to invest in this sector, it could lead to further mergers and acquisitions as larger players seek to expand their capabilities and market share.

The details

Assurance Media designs, installs, and maintains premise security, audiovisual systems, and structured cabling. The company was led by a team including Mark Stellini, Mimi Stellini, and Jennifer McKenzie. Cook & Boardman Group is a private equity-backed company that specializes in electronic access control equipment.

  • The acquisition deal closed on April 1, 2026.

The players

Assurance Media

A security and cabling company based in Wilmington, Delaware that designs, installs, and maintains premise security, audiovisual systems, and structured cabling.

Cook & Boardman Group

A private equity-backed company that specializes in electronic access control equipment and acquired Assurance Media.

Mark Stellini

A member of the leadership team at Assurance Media.

Mimi Stellini

A member of the leadership team at Assurance Media.

Jennifer McKenzie

A member of the leadership team at Assurance Media.

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The takeaway

The acquisition of Assurance Media by a private equity-backed firm highlights the ongoing consolidation in the security and technology services industry, as larger players seek to expand their capabilities and market share through mergers and acquisitions.