Chicago-based commercial bank attributes growth to high-touch service, digital innovation, and strategic expansion
Rosemont, IL (August 13, 2025) - Signature Bank, one of the fastest growing, independently-owned commercial banks in the Midwest, today announced it has once again secured a position on the 2025 Inc. 5000 list of America’s fastest-growing private companies. This marks the fifth year of recognition, underscoring the bank’s sustained growth and steadfast commitment to client-focused, relationship-driven banking.
“Earning a place on the Inc. 5000 list for the fifth year in a row is a tremendous honor and a reflection of our team's relentless dedication,” said Mick O’Rourke, President and CEO of Signature Bank. “Our growth stems from building trusted client partnerships and delivering the personalized service of a community bank with the capabilities of a larger institution—as demonstrated by our recent rise to number 12 on the Crain’s Chicago Business list of Largest Banks in Chicago.”
The Inc. 5000 list recognizes companies that have achieved significant revenue growth while navigating economic challenges. Signature Bank's continued expansion has been driven by:
Client-Centered Innovation
- Commercial banking expertise: Tailored solutions for privately held businesses across the Midwest
- Digital innovation: Cutting-edge platforms that enhance client convenience and efficiency
- Client loyalty: Long-term relationships and high retention driving consistent growth
Leadership & Expansion
- Entrepreneurial leadership: A founder-led executive team with firsthand business-building experience
- Culture of excellence: Recognized as a top workplace, attracting and retaining high-performing talent
- Strategic market expansion: Entering new verticals and regional markets aligned with the bank’s strengths
“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,” says Mike Hofman, editor-in-chief of Inc. “These businesses have thrived amid rising costs, shifting global dynamics, and constant change. They didn’t just weather the storm—they grew through it, and their stories are a powerful reminder that the entrepreneurial spirit is the engine of the U.S. economy.”
About Signature Bank
Signature Bank is an award-winning, relationship-based commercial bank wholly owned by Signature Bancorporation, Inc., a privately funded, locally owned bank holding company founded in 2006. Headquartered in Rosemont, IL, Signature Bank provides accessible, strategic, and highly individualized commercial banking services to closely held companies, as well as full-service retail banking capabilities. Technology-driven and well-capitalized, Signature Bank is currently the fastest growing, independently owned business bank in the Chicago-Wisconsin markets and is one of American Banker’s Best Banks to Work For. Visit Signature Bank online at http://www.signaturebank.bank.
About Inc.
Inc. is the leading media brand and playbook for the entrepreneurs and business leaders shaping our future. Through its journalism, Inc. aims to inform, educate, and elevate the profile of its community: the risk-takers, the innovators, and the ultra-driven go-getters who are creating the future of business. Inc. is published by Mansueto Ventures LLC, along with fellow leading business publication Fast Company. For more information, visit www.inc.com
