ALL4 Named a 2026 Hot Firm by Zweig Group
FOR IMMEDIATE RELEASE
[Kimberton, PA] — June 11, 2026 — ALL4 LLC (ALL4) has been recognized as a 2026 Hot Firm by Zweig Group, the leading provider of management consulting, research, and education for the architecture, engineering, and construction (AEC) industry.
ALL4 was recognized among the 100 fastest-growing AEC firms in the United States and Canada, earning a ranking of No. 26 on the 2026 Hot Firm List.
The Hot Firm Award honors firms that have achieved exceptional growth through a combination of strategic leadership, innovation, and strong business performance. Rankings are based on a blended score that measures both percentage and dollar revenue growth over a three-year period.
“The firms recognized through the Hot Firm Award have demonstrated what is possible when strong leadership, strategic decision-making, and a commitment to excellence come together,” said Chad Clinehens, president and CEO of Zweig Group. “These firms are not only growing, they are helping shape the future of the AEC industry. We are proud to recognize their accomplishments.”
Winners will be celebrated at the 2026 ElevateAEC Conference & Awards Gala in Park City, Utah. View the full list at The Zweig List, Zweig Group’s digital platform for celebrating excellence across the built environment.
About ALL4
ALL4 is a leading global provider of strategic consulting services, helping organizations navigate complex EHS challenges across a broad range of heavily regulated industries.
ALL4’s areas of expertise encompass acoustics, air quality, chemical reporting and management, digital solutions, sustainability, investigation and remediation, occupational health and safety, waste management, water quality, and natural resources. With offices and remote experts across the U.S., Canada, Spain, Mexico, and South America, ALL4 brings a robust North American presence and a growing international footprint to our clients, positioning us to support them seamlessly around the world.
ALL4 operates from key physical offices in the metropolitan areas of Philadelphia, PA (headquarters); Rancho Cucamonga, CA; San Juan Capistrano, CA; Atlanta, GA; Louisville, KY; Lexington, KY; Raleigh, NC; Houston, TX; Bellingham, WA; Washington, D.C.; Boston, MA; and Madrid, Spain.
ALL4 has consistently earned recognition as a “Best Place to Work” regionally and nationally, reflecting growth in personnel, culture, and environmental impact. Notable honors include:
- Verdantix Green Quadrant for Service Providers – Innovator Status
- Inc. 5000 Fastest Growing Companies
- ENR Top 200 Environmental Firms
- Zweig Hot Firm – Fastest Growing Firms
- Best Companies Group
For more information visit www.all4inc.com.
ALL4 is a portfolio company of Levine Leichtman Capital Partners (LLCP).
About Levine Leichtman Capital Partners (LLCP)
Levine Leichtman Capital Partners, LLC is a middle-market private equity firm with a 41-year track record of investing across various targeted sectors, including Business Services, Franchising & Multi-unit, Education & Training and Engineered Products & Manufacturing. LLCP utilizes a differentiated Structured Private Equity investment strategy, combining debt and equity capital investments in portfolio companies. LLCP believes that by investing in a combination of debt and equity securities, it offers management teams growth capital in a highly tailored, flexible investment structure that can be a more attractive alternative than traditional private equity.
LLCP’s global team of dedicated investment professionals is led by 9 partners who have worked at LLCP for an average of 20 years. Since inception, LLCP and its affiliates have managed approximately $18.1 billion of capital across nearly 20 investment funds and has invested in approximately 120 portfolio companies. LLCP currently manages $12.7 billion of assets and has offices in Los Angeles, New York, Chicago, Miami, London, Stockholm, Amsterdam and Frankfurt.
For more information visit www.llcp.com.
About Zweig Group
Zweig Group is the leading consulting, research, and training firm serving the AEC industry. A four-time Inc. 500/5000 honoree, Zweig Group offers solutions in M&A, strategic planning, ownership transition, executive search, valuation, and more. Zweig Group exists to help AEC firms thrive in a competitive marketplace. Learn more at zweiggroup.com.
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