Latest Period
Q1 2026
Security Snapshot
OLD SECOND BANCORP INC - Common Stock (OSBC) Institutional Ownership
CUSIP: 680277100
13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026
Institutions Reporting
188
Shares (Excl. Options)
37,782,584
Price
$20.16
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- Security type / class
- Equity / Common Stock
- Symbol
- OSBC on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 37,782,584
- Total 13F value
- $761,223,383
- Portfolio coverage rank
- 0%
- Share change
- +687,325
- Value change
- +$14,310,416
- Number of holders
- 188
- Shares outstanding
- 44,867,818
- SEC-reported price per share
- $20.61
- Insider filing price
- $20.61
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- OSBC - OLD SECOND BANCORP INC - Common Stock is tracked under CUSIP 680277100.
- 188 institutions reported positions in Q1 2026.
- 1 significant owner is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 186 to 188 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $723,939,482 to $761,223,383.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 188 institutions filings for Q1 2026.
Security key
680277100
Latest holder period
Q1 2026
13F holders
188
13D/G owners
1
CIK / CUSIP context first
Open Q1 2026 holders
OSBC full holder history
OLD SECOND BANCORP INC SEC filings
OLD SECOND BANCORP INC company facts
OLD SECOND BANCORP INC insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 680277100:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
1
Security
OSBC
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| FJ Capital Management LLC | 4.2% | $30,197,746 | 1,870,988 | FJ Capital Management LLC | 30 Sep 2024 |
As of 31 Mar 2026, 188 institutional investors reported holding 37,782,584 shares of OLD SECOND BANCORP INC - Common Stock (OSBC). This represents 84% of the company’s total 44,867,818 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
67%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 9.2% | 4,126,244 | -0.71% | 0% | $83,185,084 |
| DIMENSIONAL FUND ADVISORS LP | 5.3% | 2,388,862 | +5.7% | 0.01% | $48,158,712 |
| VANGUARD CAPITAL MANAGEMENT LLC | 5% | 2,251,849 | 0% | 0% | $45,397,276 |
| Davis Asset Management, L.P. | 4% | 1,800,000 | +3.1% | 1.1% | $36,288,000 |
| GOLDMAN SACHS GROUP INC | 3.8% | 1,691,523 | +34% | 0% | $34,101,103 |
| STATE STREET CORP | 3.6% | 1,599,302 | +3.9% | 0% | $32,241,928 |
| AMERICAN CENTURY COMPANIES INC | 3.5% | 1,590,943 | +8.2% | 0.02% | $32,073,412 |
| FJ Capital Management LLC | 3.4% | 1,505,102 | -18% | 3.4% | $30,342,856 |
| Boston Partners | 3.2% | 1,443,889 | +77% | 0.03% | $29,278,530 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.9% | 1,282,011 | -6.1% | 0% | $25,852,061 |
| KENNEDY CAPITAL MANAGEMENT LLC | 2.8% | 1,268,490 | +0.11% | 0.54% | $25,572,758 |
| BANC FUNDS CO LLC | 2.3% | 1,029,143 | +14% | 3.9% | $20,747,523 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | 2% | 878,670 | -1.5% | 0.02% | $17,713,987 |
| WELLINGTON MANAGEMENT GROUP LLP | 1.9% | 857,785 | -12% | 0% | $17,292,946 |
| Stieven Capital Advisors, L.P. | 1.7% | 773,528 | -0.33% | 3.3% | $15,594,324 |
| NORTHERN TRUST CORP | 1.7% | 764,341 | -13% | 0% | $15,409,115 |
| River Street Advisors LLC | 1.7% | 746,660 | +104% | 5.1% | $15,052,662 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1.6% | 712,433 | 0% | 0% | $14,362,649 |
| JPMORGAN CHASE & CO | 1.6% | 700,953 | -18% | 0% | $13,913,918 |
| ALLIANCEBERNSTEIN L.P. | 1.5% | 690,845 | +0.7% | 0% | $13,471,478 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 0.98% | 438,255 | +2.5% | 0.18% | $8,835,221 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.96% | 430,910 | -1.5% | 0% | $8,687,146 |
| Nuveen, LLC | 0.94% | 419,642 | +1% | 0% | $8,459,982 |
| AQR CAPITAL MANAGEMENT LLC | 0.87% | 391,960 | -12% | 0% | $7,901,908 |
| Gator Capital Management, LLC | 0.78% | 351,480 | +4% | 1.5% | $7,085,837 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
49
Latest
Q1 2026
Rows shown
1-25 of 49
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 37,782,584 | $761,223,383 | +$14,310,416 | $20.16 | 188 |
| 2025 Q4 | 37,122,870 | $723,939,482 | +$22,657,212 | $19.50 | 186 |
| 2025 Q3 | 36,122,810 | $624,386,523 | +$60,397,598 | $17.28 | 196 |
| 2025 Q2 | 32,658,226 | $579,421,668 | -$2,205,450 | $17.74 | 183 |
| 2025 Q1 | 32,856,817 | $546,654,606 | +$9,459,109 | $16.64 | 193 |
| 2024 Q4 | 32,274,259 | $573,914,478 | +$8,731,176 | $17.78 | 179 |
| 2024 Q3 | 31,750,437 | $494,981,555 | +$9,646,886 | $15.59 | 174 |
| 2024 Q2 | 30,880,867 | $457,349,769 | +$14,611,972 | $14.81 | 152 |
| 2024 Q1 | 29,994,221 | $415,144,007 | -$7,898,827 | $13.84 | 151 |
| 2023 Q4 | 30,471,166 | $470,442,806 | +$11,984,972 | $15.44 | 159 |
| 2023 Q3 | 29,894,848 | $406,777,836 | +$6,191,501 | $13.61 | 144 |
| 2023 Q2 | 29,517,177 | $385,502,797 | -$3,192,315 | $13.06 | 133 |
| 2023 Q1 | 29,517,673 | $414,997,466 | +$8,049,890 | $14.06 | 153 |
| 2022 Q4 | 29,392,278 | $471,484,534 | -$862,564 | $16.04 | 145 |
| 2022 Q3 | 29,461,474 | $384,622,795 | -$1,304,858 | $13.05 | 129 |
| 2022 Q2 | 29,531,771 | $395,245,692 | +$29,341,330 | $13.38 | 133 |
| 2022 Q1 | 27,822,741 | $403,768,517 | +$80,729,514 | $14.51 | 133 |
| 2021 Q4 | 22,379,100 | $281,729,212 | +$20,815,663 | $12.59 | 126 |
| 2021 Q3 | 20,378,098 | $266,051,454 | -$687,324 | $13.06 | 110 |
| 2021 Q2 | 20,445,539 | $253,528,578 | -$847,688 | $12.40 | 111 |
| 2021 Q1 | 20,521,289 | $271,046,191 | +$1,806,131 | $13.21 | 99 |
| 2020 Q4 | 20,887,918 | $211,083,948 | -$1,535,843 | $10.10 | 96 |
| 2020 Q3 | 21,035,517 | $157,748,402 | -$765,917 | $7.50 | 100 |
| 2020 Q2 | 21,252,658 | $164,993,436 | +$582,122 | $7.78 | 107 |
| 2020 Q1 | 21,323,329 | $147,326,661 | -$777,363 | $6.91 | 112 |