Invariant Corporation Named to 2026 Inc. 5000 List of Fastest-Growing Private Companies in America
HUNTSVILLE, AL, September 2, 2026— Inc. Magazine has named Invariant Corporation, a 100% employee-owned defense engineering and technology company headquartered in Huntsville, Alabama, to the 2026 Inc. 5000 list of the fastest-growing private companies in the United States. The Inc. 5000 recognizes companies demonstrating exceptional growth and entrepreneurial success, based on their performance from 2022 through 2025.
Founded in 2001, Invariant provides advanced engineering, software, hardware, sensor, modeling and simulation, prototyping, systems integration, and field support solutions to customers across the Department of War, homeland security, and law enforcement communities.
“For the past 25 years, Invariant has remained true to its name, maintaining an unwavering commitment to excellence while continually evolving to meet the needs of its customers,” said David Anderson, CEO and Co-Founder of Invariant Corporation. “We wanted to do exceptional technical work and provide a commitment of excellence to the customer. Giving our employees ownership has allowed us to expand our expertise and today we are a product-focused company able to adapt capabilities to the market.”
As a 100% employee-owned company, Invariant’s continued growth is closely tied to the contributions of its employees. Over the past several years, Invariant has expanded its workforce, capabilities, and facilities, and portfolio of internally developed technologies while continuing to support critical national security missions. Through this evolution, the company’s commitment to technical excellence and customer success has remained constant. That progress was most recently reflected with the company demonstrating a first in the market counter-UAS kill chain by integrating its FireFLY passive acoustic sensor and its artificial intelligence-driven EO/IR architecture with the Surface to Air Kinetic Engagement (STAKE) counter-unmanned aircraft system.
“This recognition is a testament to the hard work and dedication of Invariant’s employee-owners, who work every day to deliver valuable capabilities to the Department of War. Our continued growth reflects the increasing demand to rapidly adapt technology, solve complex challenges, and deliver meaningful capability to the warfighter,” said Anderson.
The 2026 Inc. 5000 represents more than 40 years of recognition of America’s fastest-growing private companies. This year’s honorees achieved a median three-year revenue growth rate of 130 percent from 2022 to 2025.
For Invariant, the recognition comes as the company continues to grow its presence in Huntsville and expand its capabilities in advanced defense technology, including hardware and sensor development, custom software, rapid prototyping, systems integration, and mission-critical engineering support.
For more information about Invariant Corporation, visit www.invariant-corp.com.
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About Invariant Corporation
Founded in 2001, Invariant Corporation is a 100% employee-owned company providing superior engineering and software solutions to clients across the Department of War. Headquartered in Huntsville, AL, with employees located across the United States and overseas, Invariant offers deep capabilities and expertise in hardware and sensor development, prototyping, innovative custom software development, and more.
Media Inquiries:
Shannon Bradford
sbradford@invariant-corp.com