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OSBC

Old Second Bancorp Inc
$22.85 +0.14 (+0.62%) At close · Jul 9
Market Cap
$1.17B
Shares
51,432,372

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

The Jun 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out.
Holders: 186
Total Value: $754,867,075
Total Shares: 37,390,194
Showing 1–100 of 186 holdings by value · page 1 of 2

Institutional Ownership Trend

26 quarters

Superinvestors Holding OSBC

All superinvestors →
Mario Gabelli $659,655

Holder Concentration

Across 187 13F filers
Top Holder
11.1%
Jun 2023 → Mar 2026 · range 10.6% – 11.6%
of institutional value
Top 5
33.1%
Jun 2023 → Mar 2026 · range 33.1% – 44.6%
of institutional value
Top 10
53.1%
Jun 2023 → Mar 2026 · range 53.1% – 62.0%
of institutional value
HHI
392
Jun 2023 → Mar 2026 · range 392 – 518
Broadly held
Showing 100 of 186
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
Mega BlackRock, Inc. $83,185,071 11.02% 4,126,244
Mega DIMENSIONAL FUND ADVISORS LP $48,159,456 6.38% 2,388,862
Mega VANGUARD CAPITAL MANAGEMENT LLC $45,397,275 6.01% 2,251,849
Mid Davis Asset Management, L.P. $36,288,000 4.81% 1,800,000
Mega GOLDMAN SACHS GROUP INC $34,101,103 4.52% 1,691,523
Mega STATE STREET CORP $32,241,928 4.27% 1,599,302
Mega AMERICAN CENTURY COMPANIES INC $32,073,410 4.25% 1,590,943
Small FJ Capital Management LLC $30,342,856 4.02% 1,505,102
Large Boston Partners $29,108,801 3.86% 1,443,889
Mega GEODE CAPITAL MANAGEMENT, LLC $25,845,341 3.42% 1,282,011
Mid KENNEDY CAPITAL MANAGEMENT LLC $25,572,758 3.39% 1,268,490
Small BANC FUNDS CO LLC $20,747,522 2.75% 1,029,143
Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE Insurance $17,713,987 2.35% 878,670
Mega WELLINGTON MANAGEMENT GROUP LLP $17,292,945 2.29% 857,785
Small Stieven Capital Advisors, L.P. $15,594,324 2.07% 773,528
Mega NORTHERN TRUST CORP Bank $15,409,112 2.04% 764,341
Small River Street Advisors LLC $15,052,665 1.99% 746,660
Mega JPMORGAN CHASE & CO $14,131,209 1.87% 700,953
Mega ALLIANCEBERNSTEIN L.P. $13,927,435 1.85% 690,845
Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC $8,835,220 1.17% 438,255
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $8,687,145 1.15% 430,910
Mega Nuveen, LLC $8,459,982 1.12% 419,642
Mega AQR CAPITAL MANAGEMENT LLC $7,901,911 1.05% 391,960
Large CONGRESS ASSET MANAGEMENT CO $7,897,318 1.05% 338,650
Small Gator Capital Management, LLC $7,085,836 0.94% 351,480
Mega Bank of New York Mellon Corp Bank $6,799,241 0.90% 337,264
Mega VANGUARD FIDUCIARY TRUST CO Bank $6,763,337 0.90% 335,483
Mega BANK OF AMERICA CORP /DE/ Bank $6,679,611 0.88% 331,330
Mega MORGAN STANLEY $5,612,276 0.74% 278,387
Mega UBS Group AG $5,226,963 0.69% 259,274
Large Empowered Funds, LLC $4,708,549 0.62% 233,559
Small Forum Financial Management, LP $4,146,125 0.55% 205,661
Large SEI INVESTMENTS CO $4,094,253 0.54% 203,088
Large GREAT LAKES ADVISORS, LLC $3,991,760 0.53% 198,004
Large Squarepoint Ops LLC $3,440,324 0.46% 170,651
Small Elizabeth Park Capital Advisors, Ltd. $3,355,773 0.44% 166,457
Small Siena Capital Partners GP, LLC $3,286,846 0.44% 163,038
Large BLAIR WILLIAM & CO/IL $3,283,721 0.44% 162,883
Small EJF Capital LP $3,047,587 0.40% 151,170
Small JACOBS ASSET MANAGEMENT, LLC $3,024,000 0.40% 150,000
Large Thrivent Financial for Lutherans $2,885,278 0.38% 143,119
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $2,843,084 0.38% 141,026
Mega VICTORY CAPITAL MANAGEMENT INC $2,803,328 0.37% 139,054
Mid Knights of Columbus Asset Advisors LLC $2,649,850 0.35% 131,441
Large State of New Jersey Common Pension Fund D Pension $2,608,280 0.35% 129,379
Mega BANK OF MONTREAL /CAN/ Bank $2,388,253 0.32% 118,465
Large Russell Investments Group, Ltd. $2,256,891 0.30% 111,949
Mid Curi Capital, LLC $2,026,180 0.27% 100,505
Small MENDON CAPITAL ADVISORS CORP $2,016,000 0.27% 100,000
Mega Swiss National Bank Bank $1,989,792 0.26% 98,700
Mega Fisher Asset Management, LLC $1,961,265 0.26% 97,285
Small Sara-Bay Financial $1,896,310 0.25% 94,063
Large RENAISSANCE TECHNOLOGIES LLC $1,818,936 0.24% 90,225
Mega FRANKLIN RESOURCES INC $1,777,426 0.24% 88,166
Mid MARTINGALE ASSET MANAGEMENT L P $1,758,435 0.23% 87,224
Mega BARCLAYS PLC $1,753,958 0.23% 87,002
Mega HSBC HOLDINGS PLC $1,717,289 0.23% 85,183
Small MSH Capital Advisors LLC $1,710,092 0.23% 84,826
Mega Invesco Ltd. $1,645,296 0.22% 81,612
Mega PRINCIPAL FINANCIAL GROUP INC $1,513,813 0.20% 75,090
Micro JCSD Capital, LLC $1,493,856 0.20% 74,100
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $1,361,404 0.18% 67,530
Mega TWO SIGMA INVESTMENTS, LP $1,357,917 0.18% 67,357
Mega RHUMBLINE ADVISERS $1,332,475 0.18% 66,095
Mega CITADEL ADVISORS LLC $1,210,910 0.16% 60,065
Mid Y-Intercept (Hong Kong) Ltd $1,059,932 0.14% 52,576
Large IEQ CAPITAL, LLC $1,058,541 0.14% 52,507
Mega JANE STREET GROUP, LLC $1,036,788 0.14% 51,428
Large Quantinno Capital Management LP $1,005,560 0.13% 49,879
Large Creative Planning $946,491 0.13% 46,949
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $943,407 0.12% 46,796
Mega DEUTSCHE BANK AG\ Bank $936,976 0.12% 46,477
Small Hunter Perkins Capital Management, LLC $931,069 0.12% 46,184
Large HighTower Advisors, LLC $884,056 0.12% 43,852
Large WEALTH ENHANCEMENT ADVISORY SERVICES, LLC $862,525 0.11% 42,784
Mega PRICE T ROWE ASSOCIATES INC /MD/ $835,893 0.11% 41,463
Large Corient Private Wealth LLC $828,313 0.11% 41,087
Mega Legal & General Group Plc $808,556 0.11% 40,107
Small Black Maple Capital Management LP $790,755 0.10% 39,224
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $776,825 0.10% 38,533
Mega CITIGROUP INC $750,576 0.10% 37,231
Large Rafferty Asset Management, LLC $719,611 0.10% 35,695
Mid Campbell & CO Investment Adviser LLC $714,551 0.09% 35,444
Mid GAMCO INVESTORS, INC. ET AL $659,655 0.09% 32,721
Small HUDSON EDGE INVESTMENT PARTNERS INC. $646,773 0.09% 32,082
Mega Vanguard Global Advisers, LLC $642,962 0.09% 31,893
Mega ROYAL BANK OF CANADA Bank $636,430 0.08% 31,569
Mega MILLENNIUM MANAGEMENT LLC $634,536 0.08% 31,475
Mega VANGUARD ASSET MANAGEMENT, Ltd $614,053 0.08% 30,459
Mid ROTHSCHILD INVESTMENT LLC $570,628 0.08% 28,305
Large MetLife Investment Management, LLC $565,548 0.07% 28,053
Mid Atom Investors LP $542,989 0.07% 26,934
Mega JANUS HENDERSON GROUP PLC $528,837 0.07% 26,232
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund $476,602 0.06% 23,641
Large CWM, LLC $474,062 0.06% 23,515
Mega AMERIPRISE FINANCIAL INC $469,606 0.06% 23,294
Micro Lakewood Asset Management LLC $456,644 0.06% 22,651
Small nVerses Capital, LLC $428,258 0.06% 21,243
Mid NICOLET BANKSHARES INC $407,433 0.05% 20,210
Mega WELLS FARGO & COMPANY/MN $399,611 0.05% 19,822
Key facts CIK 357173 CUSIP 680277100 13F (30d) 3 filings 3 filers Visit website Investor relations

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