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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

Chicago-Based Bank Celebrates Major Milestone as One of the Region’s Largest and Fastest-Growing Commercial Banks

Rosemont, IL — July 9, 2025 — Signature Bank has proudly advanced to the No. 12 position on the prestigious Crain’s Chicago Business 2025 list of the Largest Banks in Chicago, up from No. 15 the previous year. This significant milestone reflects the bank’s robust growth, strong financial performance and unwavering commitment to delivering exceptional commercial banking solutions across the Chicago and Wisconsin markets.

“Our improved ranking on Crain’s Chicago Business list demonstrates our ongoing commitment to exceeding expectations,” said Mick O’Rourke, President and CEO of Signature Bank. “We are pleased to further solidify our position as a trusted leader in Chicago’s commercial banking market, offering clients a combination of personalized service and sophisticated financial solutions that rival much larger institutions.”

This annual ranking, based on total assets as of December 31, 2024, highlights Signature Bank’s strategic momentum and elevated market presence. The bank’s upward trajectory is fueled by its focus on customer-centric service, innovative technology and forward-thinking financial strategies.

Key Drivers of Growth and Recognition

• Commercial Banking Excellence: Signature Bank specializes in relationship-based banking tailored to closely held companies throughout Illinois and Wisconsin, combining accessibility and strategic financial expertise.
• Digital Innovation: The bank continues to invest in advanced banking technologies to provide seamless, secure and efficient service for both commercial and retail clients.
• Award-Winning Workplace Culture: Named one of American Banker’s Best Banks to Work For, Signature Bank is powered by a dedicated team of professionals committed to excellence.

This achievement further reinforces Signature Bank’s status as one of the fastest-growing, independently owned business banks in the Chicago-Wisconsin region.

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.

Bank receives high marks from employees for supporting their growth and development, trustworthy leadership team, mutual respect among teams

ROSEMONT, IL [June 10, 2025] – The National Association for Business Resources (NABR) has named Chicago-based Signature Bank, one of the fastest growing, independently-owned commercial banks in the Midwest, to Chicago’s Best and Brightest Companies to Work For® ranking. This is the eighth consecutive year Signature Bank has made the list.

Each year, NABR recognizes companies with the most innovative business and human resources practices. Employees are asked to provide insight into their workplace experience by rating several categories. These categories include teamwork and cooperation; employee education and development; culture, communication and shared vision; recruitment and selection; and compensation benefits and employee solutions.

An independent research firm assesses the winning companies and then compares several key measures against other nationally recognized winners. Signature Bank scored high marks in several areas, including teamwork and cooperation; employee education and development; culture, communication and shared vision; and recruitment and selection.

Highlights from the survey results included that most Signature Bank employees feel they can grow and learn on the job, and that the company supports their growth and development. Employees also trust leadership to make good decisions, feel respected by their coworkers and are able to maintain a healthy work/life balance.

Signature Bank has earned numerous awards and recognitions for its growth and success. Most recently, the bank was named to the 2025 Inc. Regionals: Midwest list of the fastest-growing private companies in America. Last year, Signature Bank earned a spot on the national Inc. 5000 list of fastest growing companies in America and was named the 15 th largest bank in Chicago by Crain’s Chicago Business. American Banker also recognized the company as one of the Best Banks to Work for in the U.S., a notable distinction.

The Best and Brightest Chicago Celebration, which will honor Signature Bank and other winners, will be held at the Chicago Oakbrook Marriott on September 10.

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.

Signature Bank is pleased to welcome Erin Reardon Cohn as Senior Vice President, Commercial Banking. With over two decades of experience, she will drive strategic growth, expand and strengthen client relationships through tailored financial solutions, and foster community initiatives. Cohn serves as Board Chair of Les Turner ALS Foundation and is currently pursuing a Master of Legal Studies at Washington University School of Law in St. Louis, which she plans to complete in 2025. Read on Crain’s Chicago Business

Signature Bank Chicago has been named to Crain’s Chicago Business’ list of Largest Banks in Chicago. The bank ranks as the 15th largest bank in Chicago and has the highest “Return on average equity” and second highest “Return on average assets” and “Commercial loans” percentages. This achievement marks the bank’s seventh consecutive year of record growth and profitability. See the list.

ROSEMONT — Signature Bank announced it provided financing to J.A. Air Center to expand its operation at the Aurora Municipal Airport. The tailored financing will allow the 55-year-old company to leverge its location int he West suburbs to expand beyond its original footprint. [Read more]

Signature Bank would like its clients to know it is doing fine. And so would Signature Bank. [Read more]