Old Second Bancorp Ownership | Who Owns Old Second Bancorp?
Old Second Bancorp Ownership Summary
Old Second Bancorp is owned by 74.44% institutional investors, 4.43% insiders, and 21.13% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 8.16% of OSBC shares. Avantis US Small Cap Value ETF is the top mutual fund, with 3.19% of its assets in Old Second Bancorp shares.
OSBC Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Old Second Bancorp | 74.44% | 4.43% | 21.13% |
| Sector | Financial Services Stocks | 493.55% | 13.79% | -407.34% |
| Industry | Regional Banks Stocks | 57.00% | 12.58% | 30.42% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock funding, inc. /de | 4.30M | 8.16% | $100.25M |
| Blackrock | 3.44M | 7.68% | $50.90M |
| Vanguard group | 3.28M | 6.22% | $63.93M |
| Dimensional fund advisors lp | 2.50M | 4.74% | $58.27M |
| Vanguard capital management | 2.18M | 4.14% | $50.83M |
| State street | 1.84M | 3.49% | $42.89M |
| Davis asset management | 1.80M | 3.42% | $41.98M |
| American century companies | 1.78M | 3.39% | $41.60M |
| Goldman sachs group | 1.62M | 3.09% | $37.89M |
| Fj capital management | 1.46M | 2.77% | $34.06M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Fj capital management | 1.46M | 4.42% | $34.06M |
| Banc funds | 1.03M | 3.98% | $24.12M |
| Stieven capital advisors | 815.33K | 3.63% | $19.01M |
| Jcsd capital | 74.10K | 2.84% | $1.81M |
| Ejf capital | 151.36K | 2.36% | $3.53M |
| Elizabeth park capital advisors | 129.46K | 2.09% | $3.02M |
| Gator capital management | 359.73K | 1.76% | $8.39M |
| Pmc fig opportunities | 56.57K | 1.47% | $977.79K |
| Davis asset management | 1.80M | 1.06% | $41.98M |
| Siena capital partners gp | 163.04K | 0.92% | $3.81M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Sixth street partners management company | 431.30K | 0.00% | 431.30K |
| Citadel advisors | 304.02K | 0.00% | 243.96K |
| State street | 1.84M | 0.00% | 239.90K |
| Mariner | 225.30K | 0.01% | 207.24K |
| American century companies | 1.78M | 0.02% | 192.88K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| River street advisors | - | - | -779.01K |
| Wellington management group llp | 544.35K | 0.00% | -313.44K |
| Aptus capital advisors | - | - | -286.89K |
| Adage capital partners gp | - | - | -243.19K |
| Northern trust | 555.41K | 0.00% | -208.93K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Sixth street partners management company | 431.30K | 0.00% | 431.30K | $10.06M |
| Boothbay fund management | 125.25K | 0.03% | 125.25K | $2.16M |
| D. e. shaw | 114.33K | 0.00% | 114.33K | $2.67M |
| Pmc fig opportunities | 56.57K | 1.47% | 56.57K | $977.79K |
| Exoduspoint capital management, lp | 53.77K | 0.01% | 53.77K | $1.25M |
Sold Out
| Holder | Change |
|---|---|
| Tfc financial management | -1.00 |
| Hallmark capital management | -1.00 |
| National bank of canada /fi/ | -3.00 |
| Nelson, van denburg & campbell wealth management group | -9.00 |
| Stephens consulting | -25.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Jun 30, 2026 | 184 | -2.13% | 39,207,135 | 3.77% | 74 | 1.45% | 98 | 15.29% | 46 | -28.13% |
| Mar 31, 2026 | 184 | -0.54% | 37,389,493 | 0.13% | 70 | 1.41% | 84 | -16.83% | 62 | 6.90% |
| Dec 31, 2025 | 90 | -54.77% | 15,739,656 | -56.46% | 29 | 0.46% | 48 | -60.33% | 24 | -47.83% |
| Sep 30, 2025 | 100 | -42.86% | 17,925,486 | -39.33% | 39 | 0.92% | 59 | -31.40% | 24 | -60.66% |
| Jun 30, 2025 | 181 | -5.73% | 32,449,598 | -1.08% | 72 | 1.36% | 87 | 6.10% | 66 | -7.04% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Avantis US Small Cap Value ETF | 1.62M | 3.19% | 1.30K |
| Vanguard MStar Total Stk Mkt Idx Invest | 1.55M | 3.05% | - |
| Vanguard US Total Market Shares ETF | 1.37M | 3.04% | - |
| Vanguard Morn Total Stk Mkt Idx Investor | 1.54M | 3.01% | -74.90K |
| Vanguard Total Stock Mkt Idx Inv | 1.54M | 2.99% | -74.90K |
| iShares Russell 2000 ETF | 1.36M | 2.67% | 31.53K |
| Kennedy Small Cap Value | 656.07K | 1.28% | -16.97K |
| Vanguard Institutional Extnd Mkt Idx Tr | 594.48K | 1.17% | 1.26K |
| Fidelity Small Cap Index | 549.40K | 1.08% | 3.37K |
| State Street® SPDR® S&PRgnllBkgETF | 510.99K | 1.00% | 15.26K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Sep 23, 2026 | COLLINS GARY S | VICE CHAIRMAN | Sell | $395.08K |
| Sep 04, 2026 | COLLINS GARY S | VICE CHAIRMAN | Sell | $128.53K |
| Sep 08, 2026 | MCLEAN HUGH H | - | Sell | $640.77K |
| Sep 03, 2026 | MCLEAN HUGH H | - | Sell | $643.17K |
| Sep 02, 2026 | Campbell Darin Patrick | President, Powersports Lending | Sell | $612.79K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q3 | - | 7 |
| 2026 Q2 | 1 | 5 |
| 2026 Q1 | - | 6 |
| 2025 Q4 | - | 4 |
| 2025 Q3 | 1 | - |
OSBC Ownership FAQ
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