Old Second Bancorp
OSBC · NASDAQ
$25.10+$0.26 (+1.05%)TodayMarket closed ·
Prev close $24.84
Who owns OSBC
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 37.8% of OSBC’s shares.
- BlackRock Institutional Trust Company, N.A.7.2%
- Dimensional Fund Advisors, L.P.4.9%
- Vanguard Capital Management, LLC4.3%
- State Street Investment Management (US)3.6%
- Next 6 largest institutions17.8%
- All other shareholders62.2%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 3.68M | 7.22% |
| Dimensional Fund Advisors, L.P. | 2.50M | 4.91% |
| Vanguard Capital Management, LLC | 2.18M | 4.28% |
| State Street Investment Management (US) | 1.84M | 3.61% |
| Davis Asset Management, L.P. | 1.80M | 3.53% |
| American Century Investment Management, Inc. | 1.78M | 3.50% |
| FJ Capital Management, LLC | 1.46M | 2.87% |
| Boston Partners | 1.42M | 2.78% |
| Geode Capital Management, L.L.C. | 1.35M | 2.65% |
| Kennedy Capital Management LLC | 1.24M | 2.43% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Avantis US Small Cap Value ETF | 1.58M | 3.10% |
| Vanguard Total Stock Market Index Fund | 1.55M | 3.05% |
| iShares Russell 2000 ETF | 1.31M | 2.57% |
| Vanguard Extended Market Index Fund | 594.48K | 1.17% |
| Fidelity Small Cap Index Fund | 546.03K | 1.07% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders bought $502 (1 trade) and sold $5.49M (12 trades) of OSBC on the open market.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Gartelmann Richard A JR | Other | 35 | — |
| Pilmer Donald | Other | 11 | — |
| ADAMS BRADLEY S. | Other | 28 | — |
| Eccher James | Other | 92 | — |
| Eccher James | Other | 17 | — |
| COLLINS GARY S | Other | 30 | — |
| COLLINS GARY S | Sale | 16.00K | $395.08K |
| MCLEAN HUGH H | Sale | 25.00K | $640.77K |
| COLLINS GARY S | Sale | 5.00K | $128.52K |
| MCLEAN HUGH H | Sale | 25.00K | $643.17K |
Short interest
Settled Sep 30, 2026
- Shares short
- 2.75M
- Days to cover
- 5.36
- % of shares outstanding
- 5.39%
- Average daily volume
- 512.66K
- Change since last report
- +11.2%
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