Old Second Bancorp OSBC Institutional Ownership

Old Second Bancorp Inc (NASDAQ:OSBC) has 184 institutional investors with active 13F positions as of June 2026.

• They owned 76.5% of outstanding stock in June 2026, up from 72.1% the prior quarter.
• They increased total shares held in OSBC by 5.54% quarter over quarter, and investors in Old Second Bancorp increased 1.1% from a year ago.
• During the quarter, 98 of these 184 funds increased positions in OSBC, 46 reduced exposure, and 40 held steady.
• The aggregate institutional position in Old Second Bancorp amounted to 39.2Mn shares as of June 2026, up by 2.06Mn shares quarter on quarter, and up 6.59Mn shares year over year.
• BlackRock, Inc. leads ownership in OSBC with 4.3Mn shares as of June 30, 2026, equal to 8.39% of outstanding shares.
• The biggest buyers of Old Second Bancorp for the quarter ending June 2026 included Sixth Street Partners Management Company, L.P. (431.3K), CONGRESS ASSET MANAGEMENT CO (338.65K), CITADEL ADVISORS LLC (243.96K), State Street Corp (239.9K), Mariner, LLC (207.24K).
• The largest sales of OSBC for the quarter ending June 2026 came from WELLINGTON MANAGEMENT GROUP LLP (313.44K), Northern Trust Corp (208.93K), Jpmorgan Chase & Co (145.35K), UBS Group AG (112.05K), Sei Investments Co (85.42K).
• According to Business Quant data, leading holders of OSBC for June 2026 are BlackRock, Inc. (4.3Mn), DIMENSIONAL FUND ADVISORS LP (2.5Mn), VANGUARD CAPITAL MANAGEMENT LLC (2.18Mn), State Street Corp (1.84Mn), Davis Asset Management, L.P. (1.8Mn), AMERICAN CENTURY COMPANIES INC (1.78Mn), Goldman Sachs Group Inc (1.62Mn), FJ Capital Management LLC (1.46Mn), Boston Partners (1.42Mn), GEODE CAPITAL MANAGEMENT, LLC (1.35Mn).