Old Second BancorpOSBC
13F holders, Q4 2025 (December 31)185holders −12
19new positions
30sold out
6famous investors
$19.50avg. 13F price*
At the end of Q4 2025, 185 institutions reported holding Old Second Bancorp Inc. (OSBC) in their 13F filings, down 12 from Q3 2025. 19 opened new positions and 30 sold out. The largest holders were BlackRock, Inc. ($81.0M), Vanguard Group Inc. ($63.9M) and Dimensional Fund Advisors LP ($44.1M). 6 famous investors held it, including Mario Gabelli (0.0% of GAMCO Investors's portfolio), Cliff Asness (0.0% of AQR Capital Management's portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Old Second Bancorp Inc.
- CUSIP
- 680277100
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 19 | $29.0M |
| Exits | 30 | $20.7M |
All 13F filers, Q3 2025 → Q4 2025: 4,006,832 shares bought and 2,987,302 shares sold, net +1,019,530 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 185 holders
| BlackRock, Inc. | 0.00% | Add +8.9% | 4,155,906 | $81.0M |
| Vanguard Group Inc. | 0.00% | Add +0.3% | 3,278,388 | $63.9M |
| Dimensional Fund Advisors LP | 0.01% | Add +2.5% | 2,260,874 | $44.1M |
| FJ Capital Management LLC | 3.94% | Reduce -4.7% | 1,829,665 | $35.7M |
| Davis Asset Management, L.P. | 1.22% | Add +16.4% | 1,745,523 | $34.0M |
| State Street Corp. | 0.00% | Add +12.6% | 1,539,419 | $30.0M |
| American Century Companies Inc. | 0.01% | Add +5.9% | 1,470,185 | $28.7M |
| Geode Capital Management, LLC | 0.00% | Add +0.2% | 1,365,448 | $26.6M |
| Kennedy Capital Management LLC | 0.52% | Add +15.9% | 1,267,042 | $24.7M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -19.0% | 1,263,223 | $24.6M |
| Wellington Management Group LLP | 0.00% | Add +521.2% | 969,708 | $18.9M |
| Banc Funds Co. LLC | 3.49% | Reduce -10.1% | 905,190 | $17.7M |
| Manufacturers Life Insurance Company, The | 0.01% | Reduce -2.7% | 891,878 | $17.4M |
| Northern Trust Corp. | 0.00% | Reduce -11.7% | 881,576 | $17.2M |
| JPMorgan Chase & Co. | 0.00% | Add +10.1% | 858,806 | $16.7M |
| Boston Partners | 0.02% | New | 817,311 | $16.0M |
| Stieven Capital Advisors, L.P. | 2.81% | Reduce -0.2% | 776,128 | $15.1M |
| Alliancebernstein L.P. | 0.00% | Reduce -1.9% | 686,032 | $13.4M |
| AQR Capital Management | 0.00% | Reduce -13.7% | 447,118 | $8.7M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -0.0% | 437,510 | $8.5M |
| Bridgeway Capital Management, LLC | 0.17% | Reduce -15.3% | 427,617 | $8.3M |
| Nuveen, LLC | 0.00% | Add +0.2% | 415,470 | $8.1M |
| River Street Advisors LLC | 2.67% | Reduce -4.7% | 366,071 | $7.1M |
| Bank of New York Mellon Corp | 0.00% | Add +1.0% | 344,292 | $6.7M |
| Bank of America Corp. | 0.00% | Reduce -3.3% | 342,579 | $6.7M |
| Gator Capital Management, LLC | 1.36% | Add +0.8% | 337,995 | $6.6M |
| Millennium Management | 0.00% | New | 313,560 | $6.1M |
| Morgan Stanley | 0.00% | Reduce -7.0% | 288,122 | $5.6M |
| Jacobs Asset Management, LLC | 3.06% | Reduce -41.1% | 281,477 | $5.5M |
| Adage Capital Partners Gp, L.L.C. | 0.01% | New | 243,192 | $4.7M |
| Arrowstreet Capital, Limited Partnership | 0.00% | Reduce -0.2% | 216,511 | $4.2M |
| Forum Financial Management, LP | 0.05% | Reduce -3.0% | 208,884 | $4.1M |
| UBS Group AG | 0.00% | Add +295.2% | 177,102 | $3.5M |
| Great Lakes Advisors, LLC | 0.03% | No change | 167,385 | $3.3M |
| Siena Capital Partners GP, LLC | 0.85% | No change | 163,038 | $3.2M |
| Elizabeth Park Capital Advisors, Ltd. | 2.55% | No change | 158,657 | $3.1M |
| Victory Capital Management Inc. | 0.00% | Reduce -4.7% | 154,715 | $3.0M |
| Blair William & Co. | 0.01% | Reduce -0.1% | 154,219 | $3.0M |
| EJF Capital LP | 1.65% | Reduce -14.2% | 149,076 | $2.9M |
| Barclays PLC | 0.00% | Add +22.8% | 143,188 | $2.8M |
| Thrivent Financial for Lutherans | 0.01% | Reduce -17.6% | 143,119 | $2.8M |
| Bank of Montreal | 0.00% | Reduce -22.4% | 139,252 | $2.7M |
| Knights of Columbus Asset Advisors LLC | 0.15% | Reduce -2.6% | 132,945 | $2.6M |
| State of New Jersey Common Pension Fund D | 0.01% | Add +7.0% | 129,379 | $2.5M |
| Sei Investments Co. | 0.00% | Add +112.3% | 117,031 | $2.3M |
| Russell Investments Group, Ltd. | 0.00% | Add +0.8% | 112,121 | $2.2M |
| Martingale Asset Management L P | 0.05% | Reduce -18.3% | 110,468 | $2.2M |
| Curi Capital, LLC | 0.03% | Add +0.0% | 100,505 | $2.0M |
| Mendon Capital Advisors Corp. | 0.76% | No change | 100,000 | $1.9M |
| Sara-Bay Financial | 0.58% | No change | 99,063 | $1.9M |
| Swiss National Bank | 0.00% | Add +20.8% | 98,700 | $1.9M |
| Fisher Asset Management | 0.00% | Reduce -5.1% | 97,285 | $1.9M |
| Brandywine Global Investment Management, LLC | 0.01% | Reduce -3.6% | 90,620 | $1.8M |
| Renaissance Technologies | 0.00% | Add +75.7% | 86,325 | $1.7M |
| MSH Capital Advisors LLC | 0.35% | No change | 84,826 | $1.7M |
| Invesco Ltd. | 0.00% | Add +4.6% | 80,545 | $1.6M |
| HSBC Holdings PLC | 0.00% | Add +135.2% | 80,105 | $1.6M |
| JCSD Capital, LLC | 2.00% | Reduce -1.3% | 74,100 | $1.4M |
| Citadel Advisors | 0.00% | Reduce -13.2% | 67,313 | $1.3M |
| Rhumbline Advisers | 0.00% | Reduce -11.1% | 66,974 | $1.3M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +24.4% | 64,739 | $1.3M |
| Qube Research & Technologies Ltd | 0.00% | Reduce -75.8% | 64,157 | $1.3M |
| State Board of Administration of Florida Retirement System | 0.00% | No change | 58,816 | $1.1M |
| Hudson Edge Investment Partners Inc. | 0.17% | Reduce -5.5% | 58,241 | $1.1M |
| Ieq Capital, LLC | 0.00% | Add +7.5% | 57,265 | $1.1M |
| Wells Fargo & Company | 0.00% | Add +46.2% | 56,544 | $1.1M |
| Raymond James Financial Inc. | 0.00% | Add +157.8% | 55,133 | $1.1M |
| Ameriprise Financial Inc. | 0.00% | Reduce -35.9% | 50,629 | $987K |
| Legal & General Group Plc | 0.00% | Add +6.4% | 50,624 | $987K |
| Principal Financial Group Inc. | 0.00% | Add +42.4% | 49,782 | $971K |
| Black Maple Capital Management LP | 0.71% | Reduce -6.7% | 49,000 | $956K |
| Squarepoint Ops LLC | 0.00% | Add +368.1% | 48,472 | $945K |
| Creative Planning | 0.00% | Add +23.2% | 47,209 | $921K |
| California State Teachers Retirement System | 0.00% | Add +19.7% | 47,172 | $920K |
| Hunter Perkins Capital Management, LLC | 0.21% | No change | 45,820 | $893K |
| Citigroup Inc. | 0.00% | Add +16.8% | 45,424 | $886K |
| HighTower Advisors, LLC | 0.00% | Reduce -1.6% | 44,002 | $858K |
| Rafferty Asset Management, LLC | 0.00% | Add +17.1% | 43,049 | $839K |
| Deutsche Bank AG | 0.00% | Add +8.9% | 41,187 | $803K |
| Corient Private Wealth LP | 0.00% | Add +0.4% | 40,933 | $798K |
| Royal Bank of Canada | 0.00% | Add +7.5% | 34,831 | $679K |
| T. Rowe Price Associates Inc. | 0.00% | Add +6.3% | 34,262 | $669K |
| GAMCO Investors | 0.01% | No change | 32,721 | $638K |
| Two Sigma Investments, LP | 0.00% | Reduce -82.6% | 32,599 | $636K |
| Quantinno Capital Management LP | 0.00% | Add +30.4% | 31,418 | $613K |
| Teacher Retirement System of Texas | 0.00% | Reduce -25.4% | 30,267 | $590K |
| CenterBook Partners LP | 0.03% | Reduce -34.7% | 29,888 | $583K |
| Wealth Enhancement Advisory Services, LLC | 0.00% | Reduce -41.7% | 28,364 | $564K |
| MetLife Investment Management, LLC | 0.00% | Reduce -4.1% | 28,348 | $553K |
| Rothschild Investment LLC | 0.03% | Add +0.3% | 28,292 | $552K |
| Osaic Holdings, Inc. | 0.00% | Add +6.8% | 27,984 | $546K |
| Los Angeles Capital Management LLC | 0.00% | Add +1.8% | 28,606 | $519K |
| Alps Advisors Inc. | 0.00% | Add +0.8% | 25,189 | $491K |
| Sterling Capital Management LLC | 0.01% | Reduce -2.3% | 24,727 | $482K |
| Verition Fund Management LLC | 0.00% | Add +16.2% | 24,375 | $475K |
| Cwm, LLC | 0.00% | Reduce -1.1% | 24,085 | $470K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Reduce -0.1% | 23,405 | $456K |
| SG Americas Securities, LLC | 0.00% | Add +29.1% | 22,521 | $439K |
| Lakewood Asset Management LLC | 0.24% | Add +7.1% | 21,360 | $417K |
| Mariner, LLC | 0.00% | Add +28.2% | 21,001 | $410K |
"% of holder's portfolio" is OSBC's weight in each manager's 13F, not the share of Old Second Bancorp Inc. the manager owns.