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 6 sales; 184 institutions reported holding it in 13F filings for Q2 2026, worth $903.3M in total; no superinvestor holds it.
13F holders, Q2 2026
Institutional positions in Old Second Bancorp Inc as of Jun 30, 2026. 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
- 184
- −1 vs. Q1 2026
- Shares held
- 38.8M
- +1.11M (+2.9%) vs. Q1 2026
- Total value
- $903.3M
- +$143.3M (+18.9%) vs. Q1 2026
- New holders
- 19
- 78 more added
- Sold out
- 20
- 47 more reduced
3 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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 | $726.3M |
| Q3 2025 | 197 | $637.9M |
| Q2 2025 | 183 | $580.0M |
| Q1 2025 | 192 | $546.5M |
| Q4 2024 | 180 | $573.9M |
| Q3 2024 | 175 | $512.2M |
| Q2 2024 | 153 | $471.4M |
| Q1 2024 | 151 | $437.9M |
| Q4 2023 | 160 | $491.0M |
| Q3 2023 | 145 | $406.8M |
| Q2 2023 | 134 | $385.5M |
| Q1 2023 | 155 | $415.1M |
| Q4 2022 | 145 | $471.2M |
| Q3 2022 | 133 | $384.5M |
| Q2 2022 | 135 | $395.2M |
| Q1 2022 | 136 | $403.8M |
| Q4 2021 | 129 | $282.6M |
| Q3 2021 | 113 | $266.1M |
| Q2 2021 | 115 | $253.6M |
| Q1 2021 | 101 | $271.1M |
Institutions, Q2 2026
Shares, value and share of portfolio for each institution holding Old Second Bancorp Inc; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 4,298,683 | $100.2M | 0.00% | +172,439+4.2% | Added |
| Dimensional Fund Advisors LP | 2,498,671 | $58.3M | 0.01% | +109,809+4.6% | Added |
| Vanguard Capital Management LLC | 2,179,877 | $50.8M | 0.00% | −71,972−3.2% | Reduced |
| State Street Corp | 1,839,202 | $42.9M | 0.00% | +239,900+15.0% | Added |
| Davis Asset Management, L.P. | 1,800,000 | $42.0M | 1.06% | 00.0% | Unchanged |
| American Century Companies Inc | 1,783,820 | $41.6M | 0.02% | +192,877+12.1% | Added |
| Goldman Sachs Group Inc | 1,624,852 | $37.9M | 0.00% | −66,671−3.9% | Reduced |
| FJ Capital Management LLC | 1,460,413 | $34.1M | 4.42% | −44,689−3.0% | Reduced |
| Boston Partners | 1,415,165 | $32.9M | 0.03% | −28,724−2.0% | Reduced |
| Geode Capital Management, LLC | 1,349,432 | $31.5M | 0.00% | +67,421+5.3% | Added |
| Kennedy Capital Management, Inc. | 1,236,983 | $28.8M | 0.51% | −31,507−2.5% | Reduced |
| Banc Funds Co LLC | 1,034,143 | $24.1M | 3.98% | +5,000+0.5% | Added |
| Manufacturers Life Insurance Company, The | 872,651 | $20.4M | 0.02% | −6,019−0.7% | Reduced |
| Vanguard Portfolio Management LLC | 819,368 | $19.1M | 0.00% | +106,935+15.0% | Added |
| Stieven Capital Advisors, L.P. | 815,328 | $19.0M | 3.63% | +41,800+5.4% | Added |
| River Street Advisors LLC | 779,008 | $18.2M | 5.35% | +32,348+4.3% | Added |
| Northern Trust Corp | 555,408 | $13.0M | 0.00% | −208,933−27.3% | Reduced |
| Alliancebernstein L.P. | 641,845 | $12.9M | 0.00% | −49,000−7.1% | Reduced |
| JPMorgan Chase & Co | 555,602 | $12.9M | 0.00% | −145,351−20.7% | Reduced |
| Wellington Management Group LLP | 544,345 | $12.7M | 0.00% | −313,440−36.5% | Reduced |
| Nuveen, LLC | 492,162 | $11.5M | 0.00% | +72,520+17.3% | Added |
| Bridgeway Capital Management, LLC | 453,323 | $10.6M | 0.19% | +15,068+3.4% | Added |
| Charles Schwab Investment Management Inc | 431,304 | $10.1M | 0.00% | +394+0.1% | Added |
| AQR Capital Management LLC | 386,234 | $9.01M | 0.00% | −5,726−1.5% | Reduced |
| Bank of America Corp | 372,648 | $8.69M | 0.00% | +41,318+12.5% | Added |
| Gator Capital Management, LLC | 359,730 | $8.39M | 1.81% | +8,250+2.3% | Added |
| Bank of New York Mellon Corp | 342,013 | $7.98M | 0.00% | +4,749+1.4% | Added |
| Vanguard Fiduciary Trust Co | 341,200 | $7.96M | 0.00% | +5,717+1.7% | Added |
| Congress Asset Management Co | 338,650 | $7.90M | 0.05% | +338,650 | New |
| Morgan Stanley | 318,318 | $7.42M | 0.00% | +39,931+14.3% | Added |
| Citadel Advisors LLC | 304,021 | $7.09M | 0.00% | +243,956+406.2% | Added |
| Franklin Resources Inc | 259,324 | $6.05M | 0.00% | +171,158+194.1% | Added |
| Empowered Funds, LLC | 248,627 | $5.80M | 0.03% | +15,068+6.5% | Added |
| Thrivent Financial for Lutherans | 242,278 | $5.65M | 0.01% | +99,159+69.3% | Added |
| Mariner, LLC | 225,303 | $5.25M | 0.01% | +207,236+1,147.0% | Added |
| Arrowstreet Capital, Limited Partnership | 210,745 | $4.91M | 0.00% | +69,719+49.4% | Added |
| Forum Financial Management, LP | 205,673 | $4.80M | 0.06% | +120.0% | Added |
| Great Lakes Advisors, LLC | 203,909 | $4.76M | 0.04% | +5,905+3.0% | Added |
| Two Sigma Investments, LP | 200,819 | $4.68M | 0.00% | +133,462+198.1% | Added |
| Squarepoint Ops LLC | 167,884 | $3.92M | 0.01% | −2,767−1.6% | Reduced |
| Blair William & Co | 163,228 | $3.81M | 0.01% | +345+0.2% | Added |
| Siena Capital Partners GP, LLC | 163,038 | $3.81M | 0.92% | 00.0% | Unchanged |
| EJF Capital LLC | 151,358 | $3.53M | 2.36% | +188+0.1% | Added |
| UBS Group AG | 147,223 | $3.43M | 0.00% | −112,051−43.2% | Reduced |
| Victory Capital Management Inc | 141,914 | $3.31M | 0.00% | +2,860+2.1% | Added |
| Russell Investments Group, Ltd. | 135,010 | $3.15M | 0.00% | +23,061+20.6% | Added |
| Elizabeth Park Capital Advisors, Ltd. | 129,457 | $3.02M | 2.09% | −37,000−22.2% | Reduced |
| SEI Investments Co | 117,666 | $2.74M | 0.00% | −85,422−42.1% | Reduced |
| D. E. Shaw & Co., Inc. | 114,326 | $2.67M | 0.00% | +114,326 | New |
| RMB Capital Management, LLC | 100,505 | $2.34M | 0.04% | 00.0% | Unchanged |
| Swiss National Bank | 100,400 | $2.34M | 0.00% | +1,700+1.7% | Added |
| Mendon Capital Advisors Corp | 100,000 | $2.33M | 0.82% | 00.0% | Unchanged |
| Fisher Asset Management, LLC | 97,285 | $2.27M | 0.00% | 00.0% | Unchanged |
| First Trust Advisors LP | 94,347 | $2.20M | 0.00% | +75,587+402.9% | Added |
| State of New Jersey Common Pension Fund D | 88,964 | $2.07M | 0.01% | −40,415−31.2% | Reduced |
| Barclays PLC | 87,603 | $2.04M | 0.00% | +601+0.7% | Added |
| MSH Capital Advisors LLC | 84,826 | $1.98M | 0.34% | 00.0% | Unchanged |
| Principal Financial Group Inc | 80,534 | $1.88M | 0.00% | +5,444+7.2% | Added |
| Invesco Ltd. | 77,241 | $1.80M | 0.00% | −4,371−5.4% | Reduced |
| UBS Asset Management Americas Inc | 76,132 | $1.78M | 0.00% | +8,602+12.7% | Added |
| JCSD Capital, LLC | 74,100 | $1.73M | 2.57% | 00.0% | Unchanged |
| Quantinno Capital Management LP | 73,556 | $1.72M | 0.00% | +23,677+47.5% | Added |
| Rhumbline Advisers | 69,998 | $1.63M | 0.00% | +3,903+5.9% | Added |
| HSBC Holdings PLC | 66,312 | $1.54M | 0.00% | −18,871−22.2% | Reduced |
| Bank of Montreal | 64,272 | $1.50M | 0.00% | −54,193−45.7% | Reduced |
| Martingale Asset Management L P | 61,224 | $1.43M | 0.03% | −26,000−29.8% | Reduced |
| Sara-Bay Financial | 61,000 | $1.42M | 0.38% | −33,063−35.1% | Reduced |
| HGK Asset Management Inc | 60,706 | $1.42M | 0.19% | +28,624+89.2% | Added |
| Knights of Columbus Asset Advisors LLC | 57,364 | $1.34M | 0.07% | −74,077−56.4% | Reduced |
| Citigroup Inc | 55,100 | $1.28M | 0.00% | +17,869+48.0% | Added |
| Campbell & CO Investment Adviser LLC | 54,037 | $1.26M | 0.07% | +18,593+52.5% | Added |
| Creative Planning | 53,848 | $1.26M | 0.00% | +6,899+14.7% | Added |
| ExodusPoint Capital Management, LP | 53,769 | $1.25M | 0.01% | +53,769 | New |
| California State Teachers Retirement System | 51,243 | $1.19M | 0.00% | +4,447+9.5% | Added |
| Deutsche Bank AG | 51,034 | $1.19M | 0.00% | +4,557+9.8% | Added |
| Susquehanna Fundamental Investments, LLC | 50,693 | $1.18M | 0.02% | +34,268+208.6% | Added |
| Ieq Capital, LLC | 50,309 | $1.17M | 0.01% | −2,198−4.2% | Reduced |
| Price T Rowe Associates Inc | 46,957 | $1.10M | 0.00% | +5,494+13.3% | Added |
| Wealth Enhancement Advisory Services, LLC | 45,547 | $1.04M | 0.00% | +2,763+6.5% | Added |
| HighTower Advisors, LLC | 43,563 | $1.02M | 0.00% | −289−0.7% | Reduced |
| Wells Fargo & Company | 42,857 | $999.4K | 0.00% | +23,035+116.2% | Added |
| Legal & General Group Plc | 40,578 | $946.3K | 0.00% | +471+1.2% | Added |
| FMR LLC | 39,922 | $931.0K | 0.00% | +34,080+583.4% | Added |
| Vanguard Asset Management, Ltd | 38,777 | $904.3K | 0.00% | +8,318+27.3% | Added |
| Aquatic Capital Management LLC | 37,700 | $879.2K | 0.03% | +37,700 | New |
| Hunter Perkins Capital Management, LLC | 34,889 | $814.0K | 0.18% | −11,295−24.5% | Reduced |
| Gsa Capital Partners LLP | 34,819 | $812.0K | 0.05% | +34,819 | New |
| Sanctuary Advisors, LLC | 33,909 | $790.8K | 0.00% | +33,909 | New |
| Rothschild Investment LLC | 32,819 | $765.3K | 0.03% | +4,514+15.9% | Added |
| Rafferty Asset Management, LLC | 32,388 | $755.3K | 0.00% | −3,307−9.3% | Reduced |
| Vanguard Global Advisers, LLC | 31,893 | $743.7K | 0.00% | 00.0% | Unchanged |
| State of Wisconsin Investment Board | 30,528 | $711.9K | 0.00% | +12,643+70.7% | Added |
| Royal Bank of Canada | 30,051 | $701.0K | 0.00% | −1,518−4.8% | Reduced |
| MetLife Investment Management | 29,641 | $691.2K | 0.00% | +1,588+5.7% | Added |
| Advisor Group Holdings, Inc. | 27,233 | $635.1K | 0.00% | +17,756+187.4% | Added |
| Jupiter Topco LLC | 26,232 | $612.4K | 0.00% | +26,232 | New |
| Envestnet Asset Management Inc | 24,612 | $573.9K | 0.00% | +5,021+25.6% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 23,389 | $545.4K | 0.00% | −252−1.1% | Reduced |
| Lakewood Asset Management LLC | 22,955 | $535.3K | 0.29% | +304+1.3% | Added |
| Renaissance Technologies LLC | 21,221 | $494.9K | 0.00% | −69,004−76.5% | Reduced |