O2 Sponsor Finance Hires Aaron Markos as Senior Vice President
Old Second Bancorp (OSBC), through its division O2 Sponsor Finance, announced the hiring of Aaron Markos as Senior Vice President.
Rhea-AI Summary
Old Second Bancorp (OSBC), through its division O2 Sponsor Finance, announced the hiring of Aaron Markos as Senior Vice President. He will focus on sourcing, structuring and underwriting new lending opportunities, working with equity sponsors and management teams in the lower middle market.
The company highlights his prior experience at Deerpath Capital Management, First Midwest Bank’s Structured Finance Group (now Old National Bank), Fifth Third Bank, LaSalle National Bank and American National Bank, as well as his work on acquisition financings, recapitalizations and growth initiatives. As of June 30, 2026, Old Second reported approximately $6.9 billion in assets, $5.4 billion in deposits and $5.2 billion in loans.
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CHICAGO, IL / ACCESS Newswire / September 2, 2026 / O2 Sponsor Finance, a division of Old Second National Bank, today announced that it has recently hired Aaron Markos as Senior Vice President.
"We are excited to announce that Aaron Markos has joined as Senior Vice President of O2 Sponsor Finance. Aaron is responsible for sourcing, structuring, and underwriting new lending opportunities while partnering closely with equity sponsors and management teams. Aaron will play an important role in supporting our continued growth strategy, deepening existing sponsor relationships, and helping expand our presence across the lower middle market sponsor finance landscape. We are excited about the expertise, leadership and industry perspective Aaron brings to the team and look forward to his contributions in 2026 and beyond." Said O2 Sponsor Finance President Joe Gaffigan.
Aaron brings substantial experience to his new role, having built a strong track record across sponsor finance, direct lending, and leveraged finance. Prior to joining O2, Aaron held positions at Deerpath Capital Management, L.P., First Midwest Bank Structured Finance Group (now Old National Bank), and Fifth Third Bank Structured Finance Group. He also gained valuable experience earlier in his career at both LaSalle National Bank and American National Bank. Throughout his career, Aaron has worked closely with private equity firms, supporting acquisition financings, recapitalizations, growth initiatives, and portfolio company investments across a variety of industries.
Aaron earned an MBA in Finance from the University of Notre Dame and a BSBA in Finance from Roosevelt University.
About O2 Sponsor Finance: O2 Sponsor Finance is a national provider of cash flow-based loans to lower middle market businesses with typically
About Old Second Bancorp, Inc.: Old Second Bancorp, Inc., headquartered in Aurora, Illinois, is the bank holding company for Old Second National Bank, which celebrated 150 years of operation in 2021. Old Second's common stock trades on The NASDAQ Stock Market under the symbol "OSBC". More information about Old Second is available by visiting the "Investor Relations" section of its website: www.oldsecond.com.
As of June 30, 2026, Old Second has approximately
Old Second National Bank, Member FDIC.
Contact:
Bradley S. Adams EVP, Chief Operating Officer and Chief Financial Officer (630) 906-5484
SOURCE: Old Second Bancorp Inc.
View the original press release on ACCESS Newswire
FAQ
What did Old Second Bancorp (OSBC) announce about O2 Sponsor Finance?
Old Second Bancorp announced that its O2 Sponsor Finance division hired Aaron Markos as Senior Vice President. He will be responsible for sourcing, structuring and underwriting new lending opportunities and supporting the group’s growth strategy in the lower middle market sponsor finance space.
Who is Aaron Markos, the new Senior Vice President at O2 Sponsor Finance (OSBC)?
Aaron Markos is a finance professional with experience in sponsor finance, direct lending and leveraged finance. He previously held roles at Deerpath Capital Management, First Midwest Bank Structured Finance Group (now Old National Bank), Fifth Third Bank, LaSalle National Bank and American National Bank.
What will be Aaron Markos’s responsibilities at O2 Sponsor Finance under OSBC?
As Senior Vice President, Aaron Markos will oversee sourcing, structuring and underwriting new lending opportunities. He will partner with equity sponsors and management teams and is expected to help deepen existing sponsor relationships and expand O2 Sponsor Finance’s lower middle market presence.
What type of companies does O2 Sponsor Finance, part of OSBC, typically lend to?
O2 Sponsor Finance provides cash flow-based loans to lower middle market businesses that typically have $10 to $100 million in revenue and between $2 million and $10 million in EBITDA. It focuses on supporting private equity sponsors, independent sponsors and family offices in acquisitions or recapitalizations.
What are Old Second Bancorp’s (OSBC) key financial figures as of June 30, 2026?
As of June 30, 2026, Old Second Bancorp reported approximately $6.9 billion in assets, $5.4 billion in deposits and $5.2 billion in loans. These figures provide context for the scale of the bank supporting the O2 Sponsor Finance platform.
What is the educational background of Aaron Markos at O2 Sponsor Finance (OSBC)?
Aaron Markos holds an MBA in Finance from the University of Notre Dame and a BSBA in Finance from Roosevelt University. This academic background supports his sponsor finance, direct lending and leveraged finance experience.
On which market does Old Second Bancorp (OSBC) trade its common stock?
Old Second Bancorp’s common stock trades on The NASDAQ Stock Market under the symbol “OSBC”. The company is headquartered in Aurora, Illinois, and is the holding company for Old Second National Bank.