.svg){kind=logo}
Key Takeaways
- Hennig ranked No. 1821 on the Inc. 5000 with 239.38% revenue growth over three years
- Placed No. 61 among all U.S. manufacturing companies nationwide
- Power Protection division achieved 100% year-over-year growth over the past six years
- Company expanded from 300,000 to over 1 million square feet of facilities
- Employment grew from 345 to 1,100+ people in the Rockford area since 2021
- Production pipeline booked through 2027, driven by demand for generator enclosures and power infrastructure
Machesney Park, IL [September 10, 2025] – American manufacturing's priorities are changing. Instead of patchwork fixes focused on short-term gains, companies are demanding long-term reliability in the systems that keep industry running.
That shift is reflected in the growth of Hennig, Inc., which earned a spot on the 2025 Inc. 5000 list at No. 1821, with 239.38% revenue growth over the past three years.
Hennig ranked No. 61 among all U.S. manufacturing companies, placing it among the top-performing industrial suppliers in the nation. With estimated 2024 revenues between $100 million and $250 million, the company's trajectory underscores how U.S.-built systems power the next era of industry.
Power Protection Leads the Way
Much of Hennig's success has been driven by its Power Protection division, which has become a major growth engine. Over the past six years, the division has achieved 100% year-over-year growth, fueled by demand for generator enclosures, switchgear housings, and UL-rated fuel tanks that power essential infrastructure.
To meet this demand, Hennig has expanded its facilities from 300,000 square feet to more than one million square feet in just a few short years. Its production pipeline is already booked into 2027.
Strengthening U.S. Manufacturing Independence
Hennig's mission extends beyond business metrics. Its growth supports the broader movement to reinvigorate domestic manufacturing, reducing reliance on foreign supply chains. By sourcing American-made materials whenever possible, the company helps insulate critical industries from global supply shocks like those seen during COVID, and prepare for future uncertainties.
"At Hennig, we don't view growth as an end goal — it's a responsibility," said Dietmar Goellner, CEO of Hennig. "Our success allows us to reinvest in innovation, create opportunities for our employees, and strengthen the community that has supported us from the very beginning. Most importantly, it fuels our mission to keep American manufacturing strong and independent."
Reinvestment in Innovation and People
With momentum behind it, Hennig strategically reinvests in technology, product development, and its workforce. The company now employs more than 1,100 people in the Rockford area, up from just 345 in 2021. Employees enjoy best-in-class benefits, insurance, and employee programs that foster long-term career growth and a strong culture.
A Partner to Communities and Industry
Hennig's success has also created positive ripple effects in the Rockford region. The company supports initiatives such as the Rockford Rescue Mission and Carpenter's Place, and it partners with schools and training programs to help develop the next generation of machinists and tradespeople. By providing access to modern equipment and career pathways, Hennig invests in both industry and community.
"Making the Inc. 5000 is always a remarkable achievement, but earning a spot this year speaks volumes about a company's tenacity and clarity of vision," said Inc. Editor-in-Chief Mike Hofman. "These businesses have thrived amid rising costs, shifting global dynamics, and constant change."
When downtime is costly and systems can't wait on weak links, Hennig's growth shows that American manufacturing is setting new standards for reliability and uptime.
About Hennig, Inc.
Since 1950, Hennig Worldwide has helped manufacturers and infrastructure providers protect what matters most — from CNC machine systems to critical backup power. With deep roots in Illinois and customers around the globe, Hennig builds chip and coolant management systems, machine protection equipment, generator enclosures, and fuel storage solutions engineered for real-world performance. The company continues to grow through responsive service, smart integration, and a belief that durable, U.S.-built equipment still has a job to do.
About Inc.
Inc. is the leading media brand for entrepreneurs and business leaders. Since 1982, its annual Inc. 5000 list recognizes the fastest-growing privately held companies in the U.S. Visit inc.com/inc5000 to view the full list.