Old Second Bancorp Inc
OSBC- Exchange
- Nasdaq
- Industry
- State Commercial Banks
- SEC CIK
- 0000357173
In the last 90 days, Old Second Bancorp Inc insiders filed 0 open-market purchases and 7 sales; 184 institutions reported holding it in 13F filings for Q2 2026, worth $903.3M in total; no superinvestor holds it.
13F holders, Q4 2025
Institutional positions in Old Second Bancorp Inc as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 185
- −8 vs. Q3 2025
- Shares held
- 37.1M
- +1.03M (+2.8%) vs. Q3 2025
- Total value
- $723.9M
- +$100.0M (+16.0%) vs. Q3 2025
- New holders
- 22
- 78 more added
- Sold out
- 30
- 59 more reduced
4 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting OSBC on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 184 | $903.3M |
| Q1 2026 | 188 | $761.2M |
| Q4 2025 | 185 | $723.9M |
| Q3 2025 | 197 | $624.4M |
| Q2 2025 | 183 | $579.1M |
| Q1 2025 | 192 | $546.2M |
| Q4 2024 | 180 | $573.9M |
| Q3 2024 | 175 | $495.0M |
| Q2 2024 | 153 | $457.4M |
| Q1 2024 | 151 | $415.0M |
| Q4 2023 | 160 | $470.4M |
| Q3 2023 | 145 | $406.8M |
| Q2 2023 | 134 | $385.5M |
| Q1 2023 | 155 | $415.0M |
| Q4 2022 | 145 | $471.2M |
| Q3 2022 | 133 | $384.5M |
| Q2 2022 | 135 | $395.2M |
| Q1 2022 | 136 | $403.8M |
| Q4 2021 | 129 | $281.7M |
| Q3 2021 | 113 | $266.1M |
| Q2 2021 | 115 | $253.5M |
| Q1 2021 | 101 | $271.1M |
Institutions, Q4 2025
Shares, value and share of portfolio for each institution holding Old Second Bancorp Inc; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Magnetar Financial LLC | 0 | $0 | 0.00% | −23,901−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −22,309−100.0% | Sold out |
| Tudor Investment Corp Et Al | 0 | $0 | 0.00% | −21,772−100.0% | Sold out |
| Jupiter Asset Management Ltd | 0 | $0 | 0.00% | −19,522−100.0% | Sold out |
| Persistent Asset Partners Ltd | 0 | $0 | 0.00% | −18,182−100.0% | Sold out |
| Jacobs Levy Equity Management, Inc | 0 | $0 | 0.00% | −17,409−100.0% | Sold out |
| Fourthstone LLC | 0 | $0 | 0.00% | −12,500−100.0% | Sold out |
| D. E. Shaw & Co., Inc. | 0 | $0 | 0.00% | −12,166−100.0% | Sold out |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −11,273−100.0% | Sold out |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −10,881−100.0% | Sold out |
| STRS Ohio | 0 | $0 | 0.00% | −10,500−100.0% | Sold out |
| Wealthspire Advisors, LLC | 0 | $0 | 0.00% | −5,844−100.0% | Sold out |
| Mather Group, LLC. | 0 | $0 | 0.00% | −3,872−100.0% | Sold out |
| Tompkins Financial Corp | 0 | $0 | 0.00% | −1,145−100.0% | Sold out |
| Hallmark Capital Management Inc | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Cobblestone Capital Advisors LLC | – | – | – | – | Not filed |
| Corton Capital Inc. | – | – | – | – | Not filed |
| Shell Asset Management Co | – | – | – | – | Not filed |
| Point72 (DIFC) Ltd | – | – | – | – | Not filed |