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 |
|---|---|---|---|---|---|
| BlackRock, Inc. | 4,155,906 | $81.0M | 0.00% | +338,128+8.9% | Added |
| Vanguard Group Inc | 3,278,388 | $63.9M | 0.00% | +8,395+0.3% | Added |
| Dimensional Fund Advisors LP | 2,260,874 | $44.1M | 0.01% | +55,990+2.5% | Added |
| FJ Capital Management LLC | 1,829,665 | $35.7M | 3.94% | −90,269−4.7% | Reduced |
| Davis Asset Management, L.P. | 1,745,523 | $34.0M | 1.22% | +245,523+16.4% | Added |
| State Street Corp | 1,539,419 | $30.0M | 0.00% | +171,941+12.6% | Added |
| American Century Companies Inc | 1,470,185 | $28.7M | 0.01% | +82,294+5.9% | Added |
| Geode Capital Management, LLC | 1,365,448 | $26.6M | 0.00% | +2,263+0.2% | Added |
| Kennedy Capital Management, Inc. | 1,267,042 | $24.7M | 0.52% | +173,724+15.9% | Added |
| Goldman Sachs Group Inc | 1,263,223 | $24.6M | 0.00% | −295,483−19.0% | Reduced |
| Wellington Management Group LLP | 969,708 | $18.9M | 0.00% | +813,600+521.2% | Added |
| Banc Funds Co LLC | 905,190 | $17.7M | 3.49% | −101,188−10.1% | Reduced |
| Manufacturers Life Insurance Company, The | 891,878 | $17.4M | 0.01% | −24,790−2.7% | Reduced |
| Northern Trust Corp | 881,576 | $17.2M | 0.00% | −116,322−11.7% | Reduced |
| JPMorgan Chase & Co | 858,806 | $16.7M | 0.00% | +78,805+10.1% | Added |
| Boston Partners | 817,311 | $16.0M | 0.02% | +817,311 | New |
| Stieven Capital Advisors, L.P. | 776,128 | $15.1M | 2.81% | −1,900−0.2% | Reduced |
| Alliancebernstein L.P. | 686,032 | $13.4M | 0.00% | −13,238−1.9% | Reduced |
| AQR Capital Management LLC | 447,118 | $8.72M | 0.00% | −70,981−13.7% | Reduced |
| Charles Schwab Investment Management Inc | 437,510 | $8.53M | 0.00% | −810.0% | Reduced |
| Bridgeway Capital Management, LLC | 427,617 | $8.34M | 0.17% | −77,334−15.3% | Reduced |
| Nuveen, LLC | 415,470 | $8.10M | 0.00% | +802+0.2% | Added |
| River Street Advisors LLC | 366,071 | $7.14M | 2.67% | −17,878−4.7% | Reduced |
| Bank of New York Mellon Corp | 344,292 | $6.71M | 0.00% | +3,415+1.0% | Added |
| Bank of America Corp | 342,579 | $6.68M | 0.00% | −11,822−3.3% | Reduced |
| Gator Capital Management, LLC | 337,995 | $6.59M | 1.36% | +2,660+0.8% | Added |
| Millennium Management LLC | 313,560 | $6.11M | 0.00% | +313,560 | New |
| Morgan Stanley | 288,122 | $5.62M | 0.00% | −21,775−7.0% | Reduced |
| Jacobs Asset Management, LLC | 281,477 | $5.49M | 3.06% | −196,740−41.1% | Reduced |
| Adage Capital Partners GP, L.L.C. | 243,192 | $4.74M | 0.01% | +243,192 | New |
| Arrowstreet Capital, Limited Partnership | 216,511 | $4.22M | 0.00% | −384−0.2% | Reduced |
| Forum Financial Management, LP | 208,884 | $4.07M | 0.05% | −6,487−3.0% | Reduced |
| UBS Group AG | 177,102 | $3.45M | 0.00% | +132,290+295.2% | Added |
| Great Lakes Advisors, LLC | 167,385 | $3.26M | 0.03% | 00.0% | Unchanged |
| Siena Capital Partners GP, LLC | 163,038 | $3.18M | 0.85% | 00.0% | Unchanged |
| Elizabeth Park Capital Advisors, Ltd. | 158,657 | $3.09M | 2.55% | 00.0% | Unchanged |
| Victory Capital Management Inc | 154,715 | $3.02M | 0.00% | −7,595−4.7% | Reduced |
| Blair William & Co | 154,219 | $3.01M | 0.01% | −217−0.1% | Reduced |
| EJF Capital LLC | 149,076 | $2.91M | 1.65% | −24,758−14.2% | Reduced |
| Barclays PLC | 143,188 | $2.79M | 0.00% | +26,609+22.8% | Added |
| Thrivent Financial for Lutherans | 143,119 | $2.79M | 0.00% | −30,550−17.6% | Reduced |
| Bank of Montreal | 139,252 | $2.72M | 0.00% | −40,098−22.4% | Reduced |
| Knights of Columbus Asset Advisors LLC | 132,945 | $2.59M | 0.15% | −3,497−2.6% | Reduced |
| State of New Jersey Common Pension Fund D | 129,379 | $2.52M | 0.01% | +8,454+7.0% | Added |
| SEI Investments Co | 117,031 | $2.28M | 0.00% | +61,905+112.3% | Added |
| Russell Investments Group, Ltd. | 112,121 | $2.19M | 0.00% | +908+0.8% | Added |
| Martingale Asset Management L P | 110,468 | $2.15M | 0.05% | −24,772−18.3% | Reduced |
| RMB Capital Management, LLC | 100,505 | $1.96M | 0.03% | +90.0% | Added |
| Mendon Capital Advisors Corp | 100,000 | $1.95M | 0.76% | 00.0% | Unchanged |
| Sara-Bay Financial | 99,063 | $1.93M | 0.58% | 00.0% | Unchanged |
| Swiss National Bank | 98,700 | $1.92M | 0.00% | +17,000+20.8% | Added |
| Fisher Asset Management, LLC | 97,285 | $1.90M | 0.00% | −5,220−5.1% | Reduced |
| Brandywine Global Investment Management, LLC | 90,620 | $1.77M | 0.01% | −3,400−3.6% | Reduced |
| Renaissance Technologies LLC | 86,325 | $1.68M | 0.00% | +37,200+75.7% | Added |
| MSH Capital Advisors LLC | 84,826 | $1.65M | 0.35% | 00.0% | Unchanged |
| Invesco Ltd. | 80,545 | $1.57M | 0.00% | +3,544+4.6% | Added |
| HSBC Holdings PLC | 80,105 | $1.56M | 0.00% | +46,042+135.2% | Added |
| JCSD Capital, LLC | 74,100 | $1.44M | 2.00% | −1,000−1.3% | Reduced |
| Citadel Advisors LLC | 67,313 | $1.31M | 0.00% | −10,275−13.2% | Reduced |
| Rhumbline Advisers | 66,974 | $1.31M | 0.00% | −8,375−11.1% | Reduced |
| UBS Asset Management Americas Inc | 64,739 | $1.26M | 0.00% | +12,717+24.4% | Added |
| Qube Research & Technologies Ltd | 64,157 | $1.25M | 0.00% | −201,157−75.8% | Reduced |
| State Board of Administration of Florida Retirement System | 58,816 | $1.15M | 0.00% | 00.0% | Unchanged |
| HGK Asset Management Inc | 58,241 | $1.14M | 0.17% | −3,412−5.5% | Reduced |
| Ieq Capital, LLC | 57,265 | $1.12M | 0.00% | +3,991+7.5% | Added |
| Wells Fargo & Company | 56,544 | $1.10M | 0.00% | +17,874+46.2% | Added |
| Raymond James Financial Inc | 55,133 | $1.08M | 0.00% | +33,744+157.8% | Added |
| Ameriprise Financial Inc | 50,629 | $987.3K | 0.00% | −28,403−35.9% | Reduced |
| Legal & General Group Plc | 50,624 | $987.2K | 0.00% | +3,054+6.4% | Added |
| Principal Financial Group Inc | 49,782 | $970.8K | 0.00% | +14,820+42.4% | Added |
| Black Maple Capital Management LP | 49,000 | $955.5K | 0.71% | −3,500−6.7% | Reduced |
| Squarepoint Ops LLC | 48,472 | $945.2K | 0.00% | +38,117+368.1% | Added |
| Creative Planning | 47,209 | $920.6K | 0.00% | +8,903+23.2% | Added |
| California State Teachers Retirement System | 47,172 | $919.9K | 0.00% | +7,755+19.7% | Added |
| Hunter Perkins Capital Management, LLC | 45,820 | $893.0K | 0.21% | 00.0% | Unchanged |
| Citigroup Inc | 45,424 | $885.8K | 0.00% | +6,531+16.8% | Added |
| HighTower Advisors, LLC | 44,002 | $858.0K | 0.00% | −726−1.6% | Reduced |
| Rafferty Asset Management, LLC | 43,049 | $839.5K | 0.00% | +6,278+17.1% | Added |
| Deutsche Bank AG | 41,187 | $803.1K | 0.00% | +3,353+8.9% | Added |
| CI Private Wealth, LLC | 40,933 | $798.2K | 0.00% | +180+0.4% | Added |
| Royal Bank of Canada | 34,831 | $679.0K | 0.00% | +2,418+7.5% | Added |
| Price T Rowe Associates Inc | 34,262 | $669.0K | 0.00% | +2,019+6.3% | Added |
| Gamco Investors, Inc. Et Al | 32,721 | $638.1K | 0.01% | 00.0% | Unchanged |
| Two Sigma Investments, LP | 32,599 | $635.7K | 0.00% | −155,192−82.6% | Reduced |
| Quantinno Capital Management LP | 31,418 | $612.7K | 0.00% | +7,315+30.3% | Added |
| Teacher Retirement System of Texas | 30,267 | $590.2K | 0.00% | −10,321−25.4% | Reduced |
| CenterBook Partners LP | 29,888 | $582.8K | 0.03% | −15,909−34.7% | Reduced |
| Wealth Enhancement Advisory Services, LLC | 28,364 | $563.9K | 0.00% | −20,251−41.7% | Reduced |
| MetLife Investment Management | 28,348 | $552.8K | 0.00% | −1,217−4.1% | Reduced |
| Rothschild Investment LLC | 28,292 | $551.7K | 0.03% | +91+0.3% | Added |
| Advisor Group Holdings, Inc. | 27,984 | $545.7K | 0.00% | +1,795+6.9% | Added |
| Los Angeles Capital Management LLC | 28,606 | $519.5K | 0.00% | +493+1.8% | Added |
| Alps Advisors Inc | 25,189 | $491.2K | 0.00% | +213+0.9% | Added |
| Sterling Capital Management LLC | 24,727 | $482.2K | 0.01% | −573−2.3% | Reduced |
| Verition Fund Management LLC | 24,375 | $475.3K | 0.00% | +3,405+16.2% | Added |
| CWM, LLC | 24,085 | $470.0K | 0.00% | −273−1.1% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 23,405 | $456.4K | 0.00% | −22−0.1% | Reduced |
| SG Americas Securities, LLC | 22,521 | $439.0K | 0.00% | +5,083+29.1% | Added |
| Lakewood Asset Management LLC | 21,360 | $416.5K | 0.24% | +1,416+7.1% | Added |
| Mariner, LLC | 21,001 | $409.6K | 0.00% | +4,621+28.2% | Added |