Old Second Bancorp Inc (OSBC) Institutional Ownership

Ownership Summary

Old Second Bancorp Inc (NASDAQ:OSBC) currently has 11 active institutional owners and shareholders as of today (December 2025), that have filed 13F forms with the Securities Exchange Commission (SEC).

• The percentage of Old Second Bancorp owned by institutions changed from 77.3% in September 2025 to 0.4% in December 2025, marking a slight down trend.
• On a quarter-over-quarter basis, institutional holdings shifted by 3.44%, with a year-over-year a decrease of 93.82% in the count of filers.
• The latest 13F cycle for Old Second Bancorp reveals that of 11 total investors, 9 funds grew their exposure, whereas 0 reduced theirs and 2 made no changes.
• The total number of shares held by institutions in Old Second Bancorp increased to 205.74K as of December 2025, a net change of up by 6.85K shares quarter on quarter, and down 31.99Mn shares year over year.
• With 99.06K shares, Sara-Bay Financial commands the largest institutional position in Old Second Bancorp as of December 31, 2025, equating to 0.21% of the company.
• Among the most significant buyers of Old Second Bancorp during December 2025 were SG Americas Securities, LLC (5.08K), EASTERN BANK (758), NISA INVESTMENT ADVISORS, LLC (540), Versant Capital Management, Inc (218), SIGNATUREFD, LLC (90).
• The top 10 institutional holders of Old Second Bancorp for the quarter ending December 2025 included Sara-Bay Financial (99.06K), Hunter Perkins Capital Management, LLC (45.82K), SG Americas Securities, LLC (22.52K), Centennial Wealth Advisory LLC (17.46K), Stratos Wealth Partners, LTD. (11.68K), NISA INVESTMENT ADVISORS, LLC (4.78K), Versant Capital Management, Inc (2.75K), EASTERN BANK (758), GAMMA Investing LLC (614), SIGNATUREFD, LLC (215).