OSBC · Old Second Bancorp Inc
Market Cap
$1.31B
Shares
50.88M
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.
Holders: 185
Total Value: $905,551,803
Total Shares: 38,831,558
Showing 1–100
of 185 holdings by value
· page 1 of 2
Institutional Ownership Trend
26 quarters
Holder Concentration
Across 185 13F filers · Δ vs Mar 31, 2026Top Holder
11.1%
+0.1 pts
Top 5
32.5%
+0.0 pts
Top 10
52.1%
+0.1 pts
HHI
377
Broadly held−3
Quarterly Activity
vs Mar 31, 2026
New
20
Increased
78
Decreased
47
Sold Out
23
Unchanged
40
Holder count:
-3
Institutional value:
+18.9%
Shares held:
+2.8%
Top Buyers
vs Mar 31, 2026| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Mega CITADEL ADVISORS LLC | +243,956 | 304,021 | |
| Mega STATE STREET CORP | +239,900 | 1,839,202 | |
| Large Mariner, LLC | +207,236 | 225,303 | |
| Mega AMERICAN CENTURY COMPANIES INC | +192,877 | 1,783,820 | |
| Mega BlackRock, Inc. | +172,439 | 4,298,683 |
Top Sellers
vs Mar 31, 2026| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Mega WELLINGTON MANAGEMENT GROUP LLP | −313,440 | 544,345 | |
| Mega NORTHERN TRUST CORP | −208,933 | 555,408 | |
| Mega JPMORGAN CHASE & CO | −145,351 | 555,602 | |
| Mega UBS Group AG | −112,051 | 147,223 | |
| Large SEI INVESTMENTS CO | −85,422 | 117,666 |
Top New Positions
vs Mar 31, 2026| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Large CONGRESS ASSET MANAGEMENT CO | 338,650 | $7,897,318 | |
| Mega D. E. Shaw & Co., Inc. | 114,326 | $2,666,082 | |
| Large ExodusPoint Capital Management, LP | 53,769 | $1,253,893 | |
| Mid Aquatic Capital Management LLC | 37,700 | $879,164 | |
| Mid GSA CAPITAL PARTNERS LLP | 34,819 | $811,979 |
Top Sold-Out Positions
vs Mar 31, 2026| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Small JACOBS ASSET MANAGEMENT, LLC | 150,000 | $3,024,000 | |
| Mega JANE STREET GROUP, LLC | 51,428 | $1,036,788 | |
| Large Corient Private Wealth LLC | 41,087 | $828,313 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | 38,533 | $776,825 | |
| Large GAMCO INVESTORS, INC. ET AL | 32,721 | $659,655 |
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega BlackRock, Inc. | $100,245,282 | 11.07% | 4,298,683 | Shares | 2026-08-07 | |
| Mega DIMENSIONAL FUND ADVISORS LP | $58,269,006 | 6.43% | 2,498,671 | Shares | 2026-08-11 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC | $50,834,731 | 5.61% | 2,179,877 | Shares | 2026-08-13 | |
| Mega STATE STREET CORP | $42,890,190 | 4.74% | 1,839,202 | Shares | 2026-08-07 | |
| Mid Davis Asset Management, L.P. | $41,976,000 | 4.64% | 1,800,000 | Shares | 2026-08-12 | |
| Mega AMERICAN CENTURY COMPANIES INC | $41,598,682 | 4.59% | 1,783,820 | Shares | 2026-08-12 | |
| Mega GOLDMAN SACHS GROUP INC | $37,891,548 | 4.18% | 1,624,852 | Shares | 2026-08-14 | |
| Small FJ Capital Management LLC | $34,056,831 | 3.76% | 1,460,413 | Shares | 2026-08-14 | |
| Mega Boston Partners | $33,001,647 | 3.64% | 1,415,165 | Shares | 2026-08-04 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC | $31,468,753 | 3.48% | 1,349,432 | Shares | 2026-08-12 | |
| Mid KENNEDY CAPITAL MANAGEMENT LLC | $28,846,443 | 3.19% | 1,236,983 | Shares | 2026-08-14 | |
| Small BANC FUNDS CO LLC | $24,116,214 | 2.66% | 1,034,143 | Shares | 2026-08-13 | |
| Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE Insurance | $20,350,221 | 2.25% | 872,651 | Shares | 2026-08-14 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC | $19,107,661 | 2.11% | 819,368 | Shares | 2026-08-13 | |
| Small Stieven Capital Advisors, L.P. | $19,013,448 | 2.10% | 815,328 | Shares | 2026-08-14 | |
| Small River Street Advisors LLC | $18,166,466 | 2.01% | 779,008 | Shares | 2026-07-21 | |
| Mega ALLIANCEBERNSTEIN L.P. | $14,967,825 | 1.65% | 641,845 | Shares | 2026-08-14 | |
| Mega JPMORGAN CHASE & CO | $12,956,637 | 1.43% | 555,602 | Shares | 2026-08-12 | |
| Mega NORTHERN TRUST CORP Bank | $12,952,112 | 1.43% | 555,408 | Shares | 2026-08-13 | |
| Mega WELLINGTON MANAGEMENT GROUP LLP | $12,694,125 | 1.40% | 544,345 | Shares | 2026-08-14 | |
| Mega Nuveen, LLC | $11,477,216 | 1.27% | 492,162 | Shares | 2026-08-11 | |
| Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC | $10,571,492 | 1.17% | 453,323 | Shares | 2026-08-14 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $10,058,009 | 1.11% | 431,304 | Shares | 2026-08-14 | |
| Mega AQR CAPITAL MANAGEMENT LLC | $9,006,974 | 0.99% | 386,234 | Shares | 2026-08-14 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $8,690,148 | 0.96% | 372,648 | Shares | 2026-08-14 | |
| Small Gator Capital Management, LLC | $8,388,903 | 0.93% | 359,730 | Shares | 2026-08-13 | |
| Mega Bank of New York Mellon Corp Bank | $7,975,742 | 0.88% | 342,013 | Shares | 2026-08-06 | |
| Mega VANGUARD FIDUCIARY TRUST CO Bank | $7,956,784 | 0.88% | 341,200 | Shares | 2026-08-13 | |
| Large CONGRESS ASSET MANAGEMENT CO | $7,897,318 | 0.87% | 338,650 | Shares | 2026-07-07 | |
| Mega MORGAN STANLEY | $7,423,169 | 0.82% | 318,318 | Shares | 2026-08-13 | |
| Mega CITADEL ADVISORS LLC | $7,089,769 | 0.78% | 304,021 | Shares | 2026-09-02 | |
| Mega FRANKLIN RESOURCES INC | $6,047,435 | 0.67% | 259,324 | Shares | 2026-08-13 | |
| Large Empowered Funds, LLC | $5,797,981 | 0.64% | 248,627 | Shares | 2026-08-17 | |
| Large Thrivent Financial for Lutherans | $5,649,922 | 0.62% | 242,278 | Shares | 2026-08-14 | |
| Large Mariner, LLC | $5,254,065 | 0.58% | 225,303 | Shares | 2026-08-13 | |
| Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $4,914,573 | 0.54% | 210,745 | Shares | 2026-08-13 | |
| Small Forum Financial Management, LP | $4,796,294 | 0.53% | 205,673 | Shares | 2026-07-23 | |
| Large GREAT LAKES ADVISORS, LLC | $4,755,157 | 0.53% | 203,909 | Shares | 2026-08-10 | |
| Mega TWO SIGMA INVESTMENTS, LP | $4,683,099 | 0.52% | 200,819 | Shares | 2026-08-14 | |
| Large Squarepoint Ops LLC | $3,915,054 | 0.43% | 167,884 | Shares | 2026-08-14 | |
| Large BLAIR WILLIAM & CO/IL | $3,806,476 | 0.42% | 163,228 | Shares | 2026-08-11 | |
| Small Siena Capital Partners GP, LLC | $3,802,046 | 0.42% | 163,038 | Shares | 2026-08-14 | |
| Small EJF Capital LP | $3,529,668 | 0.39% | 151,358 | Shares | 2026-08-13 | |
| Mega UBS Group AG | $3,433,239 | 0.38% | 147,223 | Shares | 2026-08-13 | |
| Mega VICTORY CAPITAL MANAGEMENT INC | $3,309,434 | 0.37% | 141,914 | Shares | 2026-08-07 | |
| Mega Russell Investments Group, Ltd. | $3,148,432 | 0.35% | 135,010 | Shares | 2026-08-06 | |
| Small Elizabeth Park Capital Advisors, Ltd. | $3,018,937 | 0.33% | 129,457 | Shares | 2026-08-13 | |
| Large SEI INVESTMENTS CO | $2,743,970 | 0.30% | 117,666 | Shares | 2026-08-14 | |
| Mega D. E. Shaw & Co., Inc. | $2,666,082 | 0.29% | 114,326 | Shares | 2026-08-14 | |
| Mid Curi Capital, LLC | $2,343,775 | 0.26% | 100,505 | Shares | 2026-08-14 | |
| Mega Swiss National Bank Bank | $2,341,328 | 0.26% | 100,400 | Shares | 2026-08-11 | |
| Small MENDON CAPITAL ADVISORS CORP | $2,332,000 | 0.26% | 100,000 | Shares | 2026-08-11 | |
| Mega Fisher Asset Management, LLC | $2,268,686 | 0.25% | 97,285 | Shares | 2026-08-04 | |
| Mega FIRST TRUST ADVISORS LP | $2,200,172 | 0.24% | 94,347 | Shares | 2026-08-11 | |
| Large State of New Jersey Common Pension Fund D Pension | $2,074,640 | 0.23% | 88,964 | Shares | 2026-08-04 | |
| Mega BARCLAYS PLC | $2,042,901 | 0.23% | 87,603 | Shares | 2026-08-14 | |
| Small MSH Capital Advisors LLC | $1,978,142 | 0.22% | 84,826 | Shares | 2026-08-11 | |
| Mega PRINCIPAL FINANCIAL GROUP INC | $1,878,052 | 0.21% | 80,534 | Shares | 2026-08-04 | |
| Mega Invesco Ltd. | $1,801,258 | 0.20% | 77,241 | Shares | 2026-08-14 | |
| Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $1,775,397 | 0.20% | 76,132 | Shares | 2026-08-13 | |
| Micro JCSD Capital, LLC | $1,728,012 | 0.19% | 74,100 | Shares | 2026-07-22 | |
| Large Quantinno Capital Management LP | $1,715,325 | 0.19% | 73,556 | Shares | 2026-08-13 | |
| Mega RHUMBLINE ADVISERS | $1,632,353 | 0.18% | 69,998 | Shares | 2026-08-12 | |
| Mega HSBC HOLDINGS PLC | $1,546,395 | 0.17% | 66,312 | Shares | 2026-08-14 | |
| Mega BANK OF MONTREAL /CAN/ Bank | $1,498,823 | 0.17% | 64,272 | Shares | 2026-08-12 | |
| Mid MARTINGALE ASSET MANAGEMENT L P | $1,427,743 | 0.16% | 61,224 | Shares | 2026-08-13 | |
| Small Sara-Bay Financial | $1,422,520 | 0.16% | 61,000 | Shares | 2026-07-17 | |
| Small HUDSON EDGE INVESTMENT PARTNERS INC. | $1,415,663 | 0.16% | 60,706 | Shares | 2026-07-29 | |
| Mid Knights of Columbus Asset Advisors LLC | $1,337,728 | 0.15% | 57,364 | Shares | 2026-07-31 | |
| Mega CITIGROUP INC | $1,284,931 | 0.14% | 55,100 | Shares | 2026-08-03 | |
| Mid Campbell & CO Investment Adviser LLC | $1,260,142 | 0.14% | 54,037 | Shares | 2026-08-03 | |
| Large Creative Planning | $1,255,734 | 0.14% | 53,848 | Shares | 2026-08-13 | |
| Large ExodusPoint Capital Management, LP | $1,253,893 | 0.14% | 53,769 | Shares | 2026-08-14 | |
| Mega CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension | $1,194,986 | 0.13% | 51,243 | Shares | 2026-08-24 | |
| Mega DEUTSCHE BANK AG\ Bank | $1,190,112 | 0.13% | 51,034 | Shares | 2026-08-07 | |
| Mid SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC | $1,182,160 | 0.13% | 50,693 | Shares | 2026-08-14 | |
| Large IEQ CAPITAL, LLC | $1,173,205 | 0.13% | 50,309 | Shares | 2026-08-11 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ | $1,095,036 | 0.12% | 46,957 | Shares | 2026-08-14 | |
| Large WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | $1,062,156 | 0.12% | 45,547 | Shares | 2026-07-15 | |
| Large HighTower Advisors, LLC | $1,015,889 | 0.11% | 43,563 | Shares | 2026-08-05 | |
| Mega WELLS FARGO & COMPANY/MN | $999,424 | 0.11% | 42,857 | Shares | 2026-08-14 | |
| Mega Legal & General Group Plc | $946,277 | 0.10% | 40,578 | Shares | 2026-08-14 | |
| Mega FMR LLC | $930,980 | 0.10% | 39,922 | Shares | 2026-08-13 | |
| Mega VANGUARD ASSET MANAGEMENT, Ltd | $904,279 | 0.10% | 38,777 | Shares | 2026-08-13 | |
| Mid Aquatic Capital Management LLC | $879,164 | 0.10% | 37,700 | Shares | 2026-08-14 | |
| Small Hunter Perkins Capital Management, LLC | $813,611 | 0.09% | 34,889 | Shares | 2026-07-16 | |
| Mid GSA CAPITAL PARTNERS LLP | $811,979 | 0.09% | 34,819 | Shares | 2026-08-06 | |
| Large Sanctuary Advisors, LLC | $790,757 | 0.09% | 33,909 | Shares | 2026-08-13 | |
| Mid ROTHSCHILD INVESTMENT LLC | $765,339 | 0.08% | 32,819 | Shares | 2026-08-06 | |
| Large Rafferty Asset Management, LLC | $755,288 | 0.08% | 32,388 | Shares | 2026-08-14 | |
| Mega Vanguard Global Advisers, LLC | $743,744 | 0.08% | 31,893 | Shares | 2026-08-13 | |
| Large STATE OF WISCONSIN INVESTMENT BOARD | $711,912 | 0.08% | 30,528 | Shares | 2026-08-14 | |
| Mega ROYAL BANK OF CANADA Bank | $700,789 | 0.08% | 30,051 | Shares | 2026-08-14 | |
| Large MetLife Investment Management, LLC | $691,228 | 0.08% | 29,641 | Shares | 2026-08-14 | |
| Large OSAIC HOLDINGS, INC. | $635,072 | 0.07% | 27,233 | Shares | 2026-08-14 | |
| Mega Jupiter Topco LLC | $611,730 | 0.07% | 26,232 | Shares | 2026-08-14 | |
| Mega ENVESTNET ASSET MANAGEMENT INC | $573,951 | 0.06% | 24,612 | Shares | 2026-08-03 | |
| Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund | $545,431 | 0.06% | 23,389 | Shares | 2026-08-14 | |
| Small Lakewood Asset Management LLC | $535,310 | 0.06% | 22,955 | Shares | 2026-08-06 | |
| Large RENAISSANCE TECHNOLOGIES LLC | $494,873 | 0.05% | 21,221 | Shares | 2026-08-13 |
Key facts
CIK
357173
CUSIP
680277100
13F (30d)
119 filings
119 filers
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