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First Midwest Bank was a significant regional bank primarily serving Illinois, northwest Indiana, southeast Wisconsin, and other Midwest markets. Founded in 1940, it grew to become a prominent financial institution offering a full range of retail and business banking, trust and investment management, and insurance services. In February 2022, First Midwest Bancorp, Inc. (the holding company for First Midwest Bank) completed its merger with Old National Bancorp (NASDAQ: ONB), the parent company of Old National Bank. As a result, First Midwest Bank branches and operations have been integrated into Old National Bank, creating a larger, stronger financial institution with an expanded footprint across the Midwest. Customers now benefit from the combined resources, expanded product offerings, and wider branch and ATM network of Old National Bank, while retaining the community-focused banking approach both institutions were known for.
Formerly served as the primary corporate office, overseeing all strategic, operational, and administrative functions of First Midwest Bank.
A modern office building in a commercial district, designed to support a large corporate staff and banking operations.
First Midwest Bank was known for a community-focused banking culture, emphasizing customer service, teamwork, and professional development. This ethos is now part of the combined Old National Bank culture.
The Chicago headquarters was central to First Midwest Bank's operations and growth strategy, positioning it as a key player in the competitive Chicagoland and Midwest financial markets.
Prior to its merger, First Midwest Bank operated primarily in Illinois, northwest Indiana, southeast Wisconsin, eastern Iowa, and a few locations in other Midwest states. Following the merger with Old National Bank, the combined entity has a significantly larger footprint across the Midwest, including states like Indiana, Michigan, Kentucky, Minnesota, and Wisconsin. Old National Bank primarily supports clients within the United States, focusing on community and commercial banking services within its regional presence rather than extensive global operations.
8750 West Bryn Mawr Avenue
Chicago
Illinois
USA
Address: Various locations (e.g., 210 N Hammes Ave, Joliet, IL 60435 - now an ONB branch)
Served as key service points for communities in Will County and surrounding areas, reflecting the bank's deep roots in the region.
Address: Various locations (e.g., 1200 E Ogden Ave, Naperville, IL 60563 - now an ONB branch)
Catered to a mix of suburban residential and commercial clients, contributing significantly to the bank's deposit and loan portfolios.
Address: Various locations (e.g., 777 E Wisconsin Ave, Milwaukee, WI 53202 - now an ONB branch)
Supported the bank's strategic growth initiatives in key Midwestern urban centers beyond its traditional Illinois base.
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As of April 2025, First Midwest Bank' leadership includes:
First Midwest Bank has been backed by several prominent investors over the years, including:
Old National Bank has maintained a relatively stable executive team following the First Midwest Bank merger integration. Significant changes are typically announced via press releases. No major widely publicized hires or exits at the top C-suite level have been noted in the past 12 months, indicating leadership continuity.
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Old National Bank, which acquired First Midwest Bank, commonly uses a standard corporate email format. The most prevalent format is firstname.lastname@oldnational.com.
firstname.lastname@oldnational.com
Format
john.doe@oldnational.com
Example
90%
Success rate
Old National Bank Newsroom • February 7, 2024
Old National Bank announced it received a score of 100 on the Human Rights Campaign Foundation’s 2023-2024 Corporate Equality Index (CEI), the nation’s foremost benchmarking survey and report measuring corporate policies and practices related to LGBTQ+ workplace equality....more
Old National Bank Newsroom • January 23, 2024
Old National Bancorp (NASDAQ: ONB) reported fourth quarter 2023 net income of $99.0 million, or $0.33 per diluted share. Full-year 2023 net income was $515.6 million, or $1.72 per diluted share....more
PR Newswire • February 15, 2022
Old National Bancorp (NASDAQ: ONB) and First Midwest Bancorp, Inc. jointly announced the completion of their merger of equals, creating a premier Midwest bank with $46 billion in assets. The combined company operates under the Old National Bancorp and Old National Bank names....more
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