Old Second BancorpOSBC
13F holders, Q2 2026 (June 30)184holders −4
18new positions
20sold out
5famous investors
$23.26avg. 13F price*
At the end of Q2 2026, 184 institutions reported holding Old Second Bancorp Inc. (OSBC) in their 13F filings, down 4 from Q1 2026. 18 opened new positions and 20 sold out. The largest holders were BlackRock, Inc. ($100.2M), Dimensional Fund Advisors LP ($58.3M) and Vanguard Capital Management LLC ($50.8M). 5 famous investors held it, including Ken Griffin (0.0% of Citadel Advisors's portfolio), Cliff Asness (0.0% of AQR Capital Management's portfolio) and David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio).
- Company
- Old Second Bancorp Inc.
- CUSIP
- 680277100
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 18 | $15.7M |
| Exits | 20 | $9.9M |
All 13F filers, Q1 2026 → Q2 2026: 3,204,855 shares bought and 2,124,018 shares sold, net +1,080,837 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 184 holders
| BlackRock, Inc. | 0.00% | Add +4.2% | 4,298,683 | $100.2M |
| Dimensional Fund Advisors LP | 0.01% | Add +4.6% | 2,498,671 | $58.3M |
| Vanguard Capital Management LLC | 0.00% | Reduce -3.2% | 2,179,877 | $50.8M |
| State Street Corp. | 0.00% | Add +15.0% | 1,839,202 | $42.9M |
| Davis Asset Management, L.P. | 1.06% | No change | 1,800,000 | $42.0M |
| American Century Companies Inc. | 0.02% | Add +12.1% | 1,783,820 | $41.6M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -3.9% | 1,624,852 | $37.9M |
| FJ Capital Management LLC | 4.42% | Reduce -3.0% | 1,460,413 | $34.1M |
| Boston Partners | 0.03% | Reduce -2.0% | 1,415,165 | $32.9M |
| Geode Capital Management, LLC | 0.00% | Add +5.3% | 1,349,432 | $31.5M |
| Kennedy Capital Management LLC | 0.51% | Reduce -2.5% | 1,236,983 | $28.8M |
| Banc Funds Co. LLC | 3.98% | Add +0.5% | 1,034,143 | $24.1M |
| Manufacturers Life Insurance Company, The | 0.02% | Reduce -0.7% | 872,651 | $20.4M |
| Vanguard Portfolio Management LLC | 0.00% | Add +15.0% | 819,368 | $19.1M |
| Stieven Capital Advisors, L.P. | 3.63% | Add +5.4% | 815,328 | $19.0M |
| River Street Advisors LLC | 5.35% | Add +4.3% | 779,008 | $18.2M |
| Northern Trust Corp. | 0.00% | Reduce -27.3% | 555,408 | $13.0M |
| Alliancebernstein L.P. | 0.00% | Reduce -7.1% | 641,845 | $12.9M |
| JPMorgan Chase & Co. | 0.00% | Reduce -20.7% | 555,602 | $12.9M |
| Wellington Management Group LLP | 0.00% | Reduce -36.5% | 544,345 | $12.7M |
| Nuveen, LLC | 0.00% | Add +17.3% | 492,162 | $11.5M |
| Bridgeway Capital Management, LLC | 0.19% | Add +3.4% | 453,323 | $10.6M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +0.1% | 431,304 | $10.1M |
| AQR Capital Management | 0.00% | Reduce -1.5% | 386,234 | $9.0M |
| Bank of America Corp. | 0.00% | Add +12.5% | 372,648 | $8.7M |
| Gator Capital Management, LLC | 1.80% | Add +2.4% | 359,730 | $8.4M |
| Bank of New York Mellon Corp | 0.00% | Add +1.4% | 342,013 | $8.0M |
| Vanguard Fiduciary Trust Co. | 0.00% | Add +1.7% | 341,200 | $8.0M |
| Congress Asset Management Co. | 0.05% | New | 338,650 | $7.9M |
| Morgan Stanley | 0.00% | Add +14.3% | 318,318 | $7.4M |
| Citadel Advisors | 0.00% | Add +406.1% | 304,021 | $7.1M |
| Franklin Resources Inc. | 0.00% | Add +194.1% | 259,324 | $6.0M |
| Empowered Funds, LLC | 0.03% | Add +6.5% | 248,627 | $5.8M |
| Thrivent Financial for Lutherans | 0.01% | Add +69.3% | 242,278 | $5.7M |
| Mariner, LLC | 0.01% | Add +1147.0% | 225,303 | $5.3M |
| Arrowstreet Capital, Limited Partnership | 0.00% | Add +49.4% | 210,745 | $4.9M |
| Forum Financial Management, LP | 0.06% | Add +0.0% | 205,673 | $4.8M |
| Great Lakes Advisors, LLC | 0.04% | Add +3.0% | 203,909 | $4.8M |
| Two Sigma Investments, LP | 0.00% | Add +198.1% | 200,819 | $4.7M |
| Squarepoint Ops LLC | 0.01% | Reduce -1.6% | 167,884 | $3.9M |
| Blair William & Co. | 0.01% | Add +0.2% | 163,228 | $3.8M |
| Siena Capital Partners GP, LLC | 0.92% | No change | 163,038 | $3.8M |
| EJF Capital LP | 2.36% | Add +0.1% | 151,358 | $3.5M |
| UBS Group AG | 0.00% | Reduce -43.2% | 147,223 | $3.4M |
| Victory Capital Management Inc. | 0.00% | Add +2.1% | 141,914 | $3.3M |
| Russell Investments Group, Ltd. | 0.00% | Add +20.6% | 135,010 | $3.1M |
| Elizabeth Park Capital Advisors, Ltd. | 2.09% | Reduce -22.2% | 129,457 | $3.0M |
| Sei Investments Co. | 0.00% | Reduce -42.1% | 117,666 | $2.7M |
| D. E. Shaw & Co. | 0.00% | New | 114,326 | $2.7M |
| Curi Capital, LLC | 0.04% | No change | 100,505 | $2.3M |
| Swiss National Bank | 0.00% | Add +1.7% | 100,400 | $2.3M |
| Mendon Capital Advisors Corp. | 0.82% | No change | 100,000 | $2.3M |
| Fisher Asset Management | 0.00% | No change | 97,285 | $2.3M |
| First Trust Advisors LP | 0.00% | Add +402.9% | 94,347 | $2.2M |
| State of New Jersey Common Pension Fund D | 0.01% | Reduce -31.2% | 88,964 | $2.1M |
| Barclays PLC | 0.00% | Add +0.7% | 87,603 | $2.0M |
| MSH Capital Advisors LLC | 0.34% | No change | 84,826 | $2.0M |
| Principal Financial Group Inc. | 0.00% | Add +7.3% | 80,534 | $1.9M |
| Invesco Ltd. | 0.00% | Reduce -5.4% | 77,241 | $1.8M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +12.7% | 76,132 | $1.8M |
| JCSD Capital, LLC | 2.57% | No change | 74,100 | $1.7M |
| Quantinno Capital Management LP | 0.00% | Add +47.5% | 73,556 | $1.7M |
| Rhumbline Advisers | 0.00% | Add +5.9% | 69,998 | $1.6M |
| HSBC Holdings PLC | 0.00% | Reduce -22.1% | 66,312 | $1.5M |
| Bank of Montreal | 0.00% | Reduce -45.8% | 64,272 | $1.5M |
| Martingale Asset Management L P | 0.03% | Reduce -29.8% | 61,224 | $1.4M |
| Sara-Bay Financial | 0.38% | Reduce -35.1% | 61,000 | $1.4M |
| Hudson Edge Investment Partners Inc. | 0.19% | Add +89.2% | 60,706 | $1.4M |
| Knights of Columbus Asset Advisors LLC | 0.07% | Reduce -56.4% | 57,364 | $1.3M |
| Citigroup Inc. | 0.00% | Add +48.0% | 55,100 | $1.3M |
| Campbell & CO Investment Adviser LLC | 0.07% | Add +52.5% | 54,037 | $1.3M |
| Creative Planning | 0.00% | Add +14.7% | 53,848 | $1.3M |
| ExodusPoint Capital Management, LP | 0.01% | New | 53,769 | $1.3M |
| California State Teachers Retirement System | 0.00% | Add +9.5% | 51,243 | $1.2M |
| Deutsche Bank AG | 0.00% | Add +9.8% | 51,034 | $1.2M |
| Susquehanna Fundamental Investments, LLC | 0.02% | Add +208.6% | 50,693 | $1.2M |
| Ieq Capital, LLC | 0.01% | Reduce -4.2% | 50,309 | $1.2M |
| T. Rowe Price Associates Inc. | 0.00% | Add +13.3% | 46,957 | $1.1M |
| Wealth Enhancement Advisory Services, LLC | 0.00% | Add +6.5% | 45,547 | $1.0M |
| HighTower Advisors, LLC | 0.00% | Reduce -0.7% | 43,563 | $1.0M |
| Wells Fargo & Company | 0.00% | Add +116.2% | 42,857 | $999K |
| Legal & General Group Plc | 0.00% | Add +1.2% | 40,578 | $946K |
| FMR LLC | 0.00% | Add +583.4% | 39,922 | $931K |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.00% | Add +27.3% | 38,777 | $904K |
| Aquatic Capital Management LLC | 0.03% | New | 37,700 | $879K |
| Hunter Perkins Capital Management, LLC | 0.18% | Reduce -24.5% | 34,889 | $814K |
| Gsa Capital Partners LLP | 0.05% | New | 34,819 | $812K |
| Sanctuary Advisors, LLC | 0.00% | New | 33,909 | $791K |
| Rothschild Investment LLC | 0.03% | Add +15.9% | 32,819 | $765K |
| Rafferty Asset Management, LLC | 0.00% | Reduce -9.3% | 32,388 | $755K |
| Vanguard Global Advisers, LLC | 0.00% | No change | 31,893 | $744K |
| State of Wisconsin Investment Board | 0.00% | Add +70.7% | 30,528 | $712K |
| Royal Bank of Canada | 0.00% | Reduce -4.8% | 30,051 | $701K |
| MetLife Investment Management, LLC | 0.00% | Add +5.7% | 29,641 | $691K |
| Osaic Holdings, Inc. | 0.00% | Add +187.4% | 27,233 | $635K |
| Jupiter Topco LLC | 0.00% | — | 26,232 | $612K |
| Envestnet Asset Management Inc. | 0.00% | Add +25.6% | 24,612 | $574K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Reduce -1.1% | 23,389 | $545K |
| Lakewood Asset Management LLC | 0.29% | Add +1.3% | 22,955 | $535K |
| Renaissance Technologies | 0.00% | Reduce -76.5% | 21,221 | $495K |
| Mercer Global Advisors Inc. | 0.00% | Add +23.0% | 20,591 | $480K |
| Nicolet Bankshares Inc. | 0.01% | No change | 20,210 | $469K |
| Raymond James Financial Inc. | 0.00% | Add +0.1% | 19,309 | $450K |
| Savant Capital, LLC | 0.00% | Add +100.4% | 20,218 | $440K |
| New York State Common Retirement Fund | 0.00% | Add +30.6% | 18,766 | $438K |
| BNP Paribas Financial Markets | 0.00% | Add +36.2% | 18,727 | $437K |
| 4WEALTH Advisors, Inc. | 0.33% | Reduce -1.9% | 18,300 | $425K |
| Ameriprise Financial Inc. | 0.00% | Reduce -24.6% | 17,570 | $410K |
| Centennial Wealth Advisory LLC | 0.09% | Add +0.3% | 17,556 | $409K |
| Public Employees Retirement Association of Colorado | 0.00% | No change | 17,258 | $402K |
| Federated Hermes, Inc. | 0.00% | Reduce -3.4% | 17,223 | $402K |
| Y-Intercept (Hong Kong) Ltd | 0.01% | Reduce -68.2% | 16,728 | $390K |
| Cetera Investment Advisers | 0.00% | Add +35.0% | 15,802 | $369K |
| Kestra Advisory Services, LLC | 0.00% | Add +0.3% | 14,958 | $349K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | No change | 14,232 | $332K |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 0.00% | No change | 14,193 | $331K |
| Sentinel Trust Co. Lba | 0.03% | No change | 14,051 | $328K |
| Arizona State Retirement System | 0.00% | Add +0.5% | 13,812 | $322K |
| Princeton Capital Management LLC | 0.07% | No change | 13,770 | $321K |
| Sterling Capital Management LLC | 0.01% | Add +702.2% | 13,405 | $313K |
| Captrust Financial Advisors | 0.00% | Reduce -26.6% | 13,309 | $310K |
| State Board of Administration of Florida Retirement System | 0.00% | No change | 12,390 | $289K |
| Black Maple Capital Management LP | 0.19% | Reduce -69.4% | 12,000 | $280K |
| Arax Advisory Partners | 0.00% | Add +729.4% | 11,778 | $275K |
| Virtu Financial LLC | 0.01% | New | 11,758 | $274K |
| Stratos Wealth Partners, LTD. | 0.00% | No change | 11,663 | $272K |
| Caldwell Sutter Capital, Inc. | 0.10% | No change | 11,000 | $257K |
| Hohimer Wealth Management, LLC | 0.03% | Add +0.4% | 10,957 | $256K |
| SG Americas Securities, LLC | 0.00% | Reduce -4.5% | 10,863 | $253K |
| KLP Kapitalforvaltning As | 0.00% | No change | 10,700 | $250K |
| Voya Investment Management LLC | 0.00% | New | 10,636 | $248K |
| Intech Investment Management LLC | 0.00% | Reduce -11.9% | 10,560 | $246K |
| J.W. Cole Advisors, Inc. | 0.00% | New | 10,509 | $245K |
| Cerity Partners LLC | 0.00% | Reduce -0.6% | 10,472 | $244K |
| Vanguard Investments Australia, Ltd. | 0.00% | No change | 10,395 | $242K |
| Choreo, LLC | 0.00% | New | 9,099 | $212K |
| VERITY Wealth Advisors | 0.12% | New | 8,815 | $206K |
| NewEdge Advisors, LLC | 0.00% | New | 8,660 | $202K |
| Tsfg, LLC | 0.02% | No change | 7,125 | $166K |
| Bartlett & Co. Wealth Management LLC | 0.00% | Add +0.3% | 6,320 | $147K |
| CANADA LIFE ASSURANCE Co | 0.00% | No change | 5,637 | $131K |
| Nisa Investment Advisors, LLC | 0.00% | Add +14.6% | 5,475 | $128K |
| Parkside Financial Bank & Trust | 0.01% | Reduce -2.6% | 4,484 | $105K |
| Ameritas Investment Partners, Inc. | 0.00% | No change | 4,314 | $101K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +17.8% | 2,934 | $68K |
| Versant Capital Management, Inc | 0.01% | No change | 2,751 | $64K |
| Parallel Advisors, LLC | 0.00% | No change | 2,622 | $61K |
| State of Alaska, Department of Revenue | 0.00% | No change | 1,771 | $41K |
| Harbour Investments, Inc. | 0.00% | No change | 1,347 | $31K |
| Jones Financial Companies LLLP | 0.00% | Add +2825.0% | 1,053 | $25K |
| Pinnacle Wealth Planning Services, Inc. | 0.00% | No change | 1,045 | $24K |
| US Bancorp \de | 0.00% | Add +1.7% | 1,002 | $23K |
| Sfam, LLC | 0.02% | Reduce -83.0% | 992 | $23K |
| EverSource Wealth Advisors, LLC | 0.00% | Reduce -40.0% | 937 | $22K |
| IFP Advisors, Inc | 0.00% | Add +1.8% | 797 | $19K |
| GAMMA Investing LLC | 0.00% | Add +1.7% | 650 | $15K |
| Allworth Financial LP | 0.00% | Add +11.4% | 566 | $13K |
| Covestor Ltd | 0.01% | Add +16.5% | 566 | $13K |
| Essential Partners LLC | 0.01% | Reduce -55.3% | 540 | $13K |
| Northwestern Mutual Wealth Management Co. | 0.00% | No change | 400 | $9K |
| Los Angeles Capital Management LLC | 0.00% | No change | 369 | $9K |
| PNC Financial Services Group, Inc. | 0.00% | Add +5.0% | 297 | $7K |
| Huntington National Bank | 0.00% | New | 288 | $7K |
| Farther Finance Advisors, LLC | 0.00% | Reduce -12.1% | 232 | $5K |
| Signaturefd, LLC | 0.00% | No change | 215 | $5K |
| Clearstead Advisors, LLC | 0.00% | New | 211 | $5K |
| Danske Bank A/S | 0.00% | No change | 200 | $5K |
| Optiver Holding B.V. | 0.00% | Reduce -4.3% | 178 | $4K |
| Quarry LP | 0.00% | Reduce -41.8% | 163 | $4K |
| Smartleaf Asset Management LLC | 0.00% | No change | 159 | $4K |
| Fortitude Family Office, LLC | 0.00% | New | 155 | $4K |
| Larson Financial Group LLC | 0.00% | No change | 128 | $3K |
| Rockefeller Capital Management L.P. | 0.00% | Reduce -53.6% | 123 | $3K |
| Keating Financial Advisory Services, Inc. | 0.00% | No change | 76 | $2K |
| True Wealth Design, LLC | 0.00% | Reduce -30.4% | 64 | $1K |
| Bruce G. Allen Investments, LLC | 0.00% | No change | 49 | $1K |
| Torren Management, LLC | 0.00% | No change | 44 | $1K |
| First Horizon Corp. | 0.00% | No change | 43 | $1K |
| Caitong International Asset Management Co., Ltd | 0.00% | No change | 24 | $560 |
| Physician Wealth Advisors, Inc. | 0.00% | New | 15 | $350 |
| TD Private Client Wealth LLC | 0.00% | No change | 12 | $280 |
| Zions Bancorporation, National Association | 0.00% | New | 5 | $117 |
| SJS Investment Consulting Inc. | 0.00% | New | 5 | $117 |
| GHP Investment Advisors, Inc. | 0.00% | No change | 1 | $24 |
"% of holder's portfolio" is OSBC's weight in each manager's 13F, not the share of Old Second Bancorp Inc. the manager owns.