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Old Second
How has Old Second evolved since 1871?
Founded after the Great Chicago Fire, Old Second grew from a community lender in Aurora into a regional bank balancing tradition and modern banking. Its conservative growth helped it weather cycles and support Fox River Valley industry.
Established as Second National Bank of Aurora by Alonzo George and local businessmen, Old Second expanded steadily through conservative lending and local focus, becoming Old Second Bancorp with $8.5 billion in assets by late 2025. Read a product analysis: Old Second Porter's Five Forces Analysis
What is the Old Second Founding Story?
Founding Story of Old Second began when the Second National Bank of Aurora received its charter on September 1, 1871, establishing a local institution focused on secured commercial lending and serving the Fox River Valley community.
Founding Story
On September 1, 1871, Alonzo George and a group of local leaders chartered the Second National Bank of Aurora with an initial capitalization of $100,000, targeting credit needs of manufacturing and agriculture in the region.
- The founding team included Alonzo George, T.N. Holden and Daniel Volintine
- Business model centered on secured commercial lending and national currency issuance
- Named as the second nationally chartered bank in Aurora—later nicknamed Old Second
- Survived the Panic of 1873 and early depressions through fiscal conservatism and local focus
The Old Second Company history shows the bank operated from a modest, secure facility emphasizing personal relationships, which helped it dominate Kane County banking in subsequent decades; see Competitors Landscape of Old Second for related context.
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What Drove the Early Growth of Old Second?
Old Second Company history shows steady early growth as the bank consolidated its role as Aurora’s primary depository, supporting local manufacturers and suburban residential expansion through the early 20th century.
Landmark headquarters, 1924
In 1924 Old Second completed its landmark downtown Aurora headquarters, signaling permanence and growing wealth as it became central to the city’s industrial financing needs.
Organic regional growth
Growth was largely organic, driven by expanding local manufacturing and western Chicago suburban development, positioning the bank for midcentury regional leadership.
Transition to modern lending
By mid-20th century the bank shifted focus to real estate and consumer lending, navigating the move from the gold standard to an inflationary economy and broader credit markets.
Formation of a holding company, 1982
The 1982 creation of Old Second Bancorp, Inc. enabled better capital management and a platform for acquisitions that expanded the Old Second Company footprint across northern Illinois.
Throughout the 1990s and early 2000s Old Second Company history includes targeted acquisitions—such as Kane County Bank and Trust and Heritage Bank—that extended reach into Kendall, DeKalb and Will counties, contributing to a branch network growth of over 150 locations by the early 2000s and preparing the firm for a public listing.
NASDAQ listing, 2002
Old Second Bancorp listed on NASDAQ under ticker OSBC in 2002, marking the transition from local community bank to a publicly traded regional bank with enhanced capital access.
Local roots, regional competitiveness
Leveraging deep local ties, the bank competed with larger money-center banks by focusing on community relationships, commercial real estate financing, and consumer banking in high-growth suburban markets.
Key milestones in the Old Second Company timeline—from its founding and early years in Aurora to the 1924 headquarters, 1982 holding-company formation, and 2002 NASDAQ listing—are detailed further in this article on strategy: Growth Strategy of Old Second
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What are the key Milestones in Old Second history?
Milestones, innovations and challenges in Old Second Company history show resilience through crises, transformative mergers and a tech-forward pivot that preserved profitability and expanded market reach.
| Year | Milestone |
|---|---|
| 2009 | Participated in the Treasury Capital Purchase Program, receiving $73,000,000 to stabilize capital during the 2008–2009 crisis. |
| 2013 | Repaid TARP funds in full after balance sheet restructuring and credit risk mitigation measures. |
| 2021 | Completed acquisition of West Suburban Bancorp, Inc. for approximately $297,000,000, nearly doubling assets and boosting core deposits. |
| 2024 | Launched an upgraded digital banking suite and began rolling out AI-driven wealth management tools targeting younger customers. |
| 2024 | Reported record net income exceeding $95,000,000 despite a high-interest-rate environment. |
| Q3 2025 | Maintained a competitive efficiency ratio near 52% while preserving strong net interest margin amid continued rate volatility. |
Recent innovations centered on a revamped digital banking platform and AI-driven wealth-management capabilities, enhancing customer experience and cross-sell efficiency. The bank combined relationship banking with fintech investments to capture a younger, tech-savvy client base.
Digital Banking Suite
Deployed a modernized online and mobile platform in 2024 with enhanced security and real-time analytics for customers.
AI Wealth Tools
Introduced AI-driven advisory tools in 2024–2025 to personalize investment recommendations and improve advisor productivity.
Core Deposit Expansion
Post-2021 merger focus strengthened low-cost deposit base, improving funding stability and liquidity metrics.
Credit Risk Controls
Enhanced underwriting and monitoring after 2008–2009, diversifying away from concentrated construction and land development exposure.
Data Analytics
Integrated analytics to improve loan portfolio performance and identify cross-sell opportunities across the franchise.
Cybersecurity Upgrades
Invested in advanced security and fraud-detection systems to protect digital channels and customer data.
Major challenges included heavy exposure to the Chicago real estate downturn during the 2008 crisis, prompting capital support through TARP and multi-year restructuring. Later, the 2023–2024 high-rate environment tested margin management, requiring active asset-liability and credit strategies.
Legacy CRE Concentration
Experienced significant losses from construction and land-development loans during the 2008 downturn, necessitating workout strategies and charge-offs.
Capital Stabilization
Accepted TARP funds in 2009 to restore capital adequacy, followed by disciplined repayment and capital rebuilding through 2013.
Rate Volatility
High interest rates in 2023–2024 pressured funding costs and required nimble margin and liquidity management across the balance sheet.
Integration Risk
The $297,000,000 acquisition in 2021 created integration and systems consolidation demands that were managed over multiple years.
Regulatory Scrutiny
Heightened oversight following crisis-era support required strengthened compliance, reporting and capital planning frameworks.
Market Competition
Competed with larger regional banks and fintech entrants for deposits and digital customers, driving continued tech investment.
For additional context on corporate direction and values, see Mission, Vision & Core Values of Old Second
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What is the Timeline of Key Events for Old Second?
Timeline and Future Outlook: a concise timeline of Old Second Company history highlights major milestones from its 1871 founding through 2025 cloud migration and outlines strategic, data-driven growth and acquisition plans.
| Year | Key Event |
|---|---|
| 1871 | Second National Bank of Aurora is founded and chartered, marking the founding of Old Second Company origins. |
| 1924 | Completion of the iconic downtown Aurora headquarters building, a long-standing symbol of the bank's community roots. |
| 1982 | Formation of Old Second Bancorp, Inc. as a bank holding company to support future expansion. |
| 2002 | Old Second Bancorp, Inc. begins trading on the NASDAQ stock exchange, increasing public-market access. |
| 2008 | Navigates the global financial crisis and participates in the TARP program to stabilize capital. |
| 2013 | Fully repays TARP funds, signaling a return to independent fiscal strength and balance-sheet normalization. |
| 2016 | Acquisition of Chicago-area branches from Talmer Bank and Trust expands regional footprint and commercial lending capacity. |
| 2018 | Acquisition of Greater Chicago Financial Corp and its subsidiary, ABC Bank, adds scale and deposit diversification. |
| 2021 | Announces and completes the transformative merger with West Suburban Bancorp, substantially increasing assets and market presence. |
| 2024 | Achieves record-breaking annual net income and expands commercial lending teams, reflecting operating leverage. |
| 2025 | Implements a comprehensive cloud-based core banking migration to enhance scalability and digital service delivery. |
Scale through M&A
Analysts expect targeted acquisitions in the fragmented Chicago market in the $500 million–$1.5 billion asset range to drive cost optimization and branch consolidation.
Commercial lending focus
Management prioritizes growth in C&I lending; commercial portfolios expanded materially after the 2021 merger and 2024 hiring of additional relationship teams.
Digital and cloud transformation
The 2025 cloud-based core migration boosts scalability and enables modern APIs for fintech partnerships and proprietary data analytics investments.
Wealth management expansion
Wealth division AUM grew by 12% year-over-year in 2025, indicating a strategic priority to diversify fee income beyond interest margin.
For additional context on strategy and market positioning, see Marketing Strategy of Old Second
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