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Stambaugh Ness Acquires Zweig Group,

Stambaugh Ness Acquires Zweig Group,

AcquisitionProfessional ServicesUS

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Acquired

Zweig Group

United StatesProfessional Services

Undisclosed amount

September 16, 2026

Stambaugh Ness logo
Acquirer

Stambaugh Ness

Business Consulting and Services

Stambaugh Ness has acquired Zweig Group for an undisclosed amount. Zweig Group is recognized as a national leader in enhancing business performance for architecture, engineering, planning, construction, and environmental consulting firms. The company provides a comprehensive suite of products and services, including magazines, newsletters, surveys, market research reports, executive training, seminars, conferences, and management consulting services that cover various aspects of business management within the AEC industry.

This acquisition represents a strategic move for Stambaugh Ness to deepen its capabilities and expand its reach within the professional services sector for AEC firms. By integrating Zweig Group's established expertise and extensive service offerings, Stambaugh Ness aims to provide a more robust and integrated set of solutions to its clients. The purchase is intended to leverage Zweig Group's strong market presence and its reputation for delivering valuable insights and performance enhancement tools to the industry.

The combination of these two entities is expected to generate considerable value through enhanced service delivery and broader client engagement. The unified organization will be positioned to offer a more comprehensive approach to business management, market intelligence, and professional development for AEC companies. This integration will allow for the development of more innovative and tailored solutions, addressing the complex challenges faced by firms in the architecture, engineering, and construction fields.

The newly combined entity is poised to strengthen its position as a premier resource for AEC firms seeking to optimize their operations and achieve sustained growth. The focus will remain on empowering businesses with strategic thinking and practical tools, ensuring clients have access to leading-edge advice and resources to navigate future industry landscapes.

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