Old Second Bancorp, Inc.
DE ˙ DB ˙ US6802771005
18,20 € ↑0,60 (3,41%)
2026-06-05
DEL PRIS
SecurityDE:OSB / Old Second Bancorp, Inc.
InstitutionGeode Capital Management, Llc
Latest Disclosed Ownership1,282,011 shares
Latest Disclosed Value $ 25,852,061
Geode Capital Management, Llc reports 6.11% decrease in ownership of OSB / Old Second Bancorp, Inc.

On May 15, 2026 - Geode Capital Management, Llc filed a 13F-HR form disclosing ownership of 1,282,011 shares of Old Second Bancorp, Inc. (DE:OSB) valued at $21,922,388 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 1,365,448 shares of Old Second Bancorp, Inc.. This represents a change in shares of -6.11% during the quarter. The current value of the position is $23,332,600 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F OLD SECOND BANCORP COM 680277100 1,282,011 -83,437 -6.11 25,852 -2.93 0.0009
2026-02-09 2025-12-31 13F OLD SECOND BANCORP COM 680277100 1,365,448 2,263 0.17 26,632 13.01 0.0016
2025-11-12 2025-09-30 13F OLD SECOND BANCORP COM 680277100 1,363,185 211,814 18.40 23,566 15.36 0.0015
2025-08-08 2025-06-30 13F OLD SECOND BANCORP COM 680277100 1,151,371 24,565 2.18 20,429 8.93 0.0014
2025-05-13 2025-03-31 13F OLD SECOND BANCORP COM 680277100 1,126,806 92,097 8.90 18,754 1.92 0.0015
2025-02-12 2024-12-31 13F OLD SECOND BANCORP COM 680277100 1,034,709 5,224 0.51 18,402 14.63 0.0014
2024-11-12 2024-09-30 13F OLD SECOND BANCORP COM 680277100 1,029,485 22,747 2.26 16,053 7.64 0.0013
2024-08-09 2024-06-30 13F OLD SECOND BANCORP COM 680277100 1,006,738 51,144 5.35 14,913 12.74 0.0013
2024-05-13 2024-03-31 13F OLD SECOND BANCORP COM 680277100 955,594 19,372 2.07 13,227 -8.50 0.0012
2024-02-13 2023-12-31 13F OLD SECOND BANCORP COM 680277100 936,222 42,033 4.70 14,457 18.77 0.0015
2023-11-13 2023-09-30 13F OLD SECOND BANCORP COM 680277100 894,189 38,154 4.46 12,171 8.87 0.0014
2023-08-11 2023-06-30 13F OLD SECOND BANCORP COM 680277100 856,035 45,711 5.64 11,180 -1.88 0.0013
2023-05-15 2023-03-31 13F OLD SECOND BANCORP COM 680277100 810,324 33,973 4.38 11,393 94,841.67 0.0015
2023-02-13 2022-12-31 13F OLD SECOND BANCORP COM 680277100 776,351 22,691 3.01 12 -99.88 0.0017
2022-11-14 2022-09-30 13F OLD SECOND BANCORP COM 680277100 753,660 19,804 2.70 9,835 0.17 0.0015
2022-08-12 2022-06-30 13F OLD SECOND BANCORP COM 680277100 733,856 241,819 49.15 9,818 37.53 0.0014
2022-05-13 2022-03-31 13F OLD SECOND BANCORP COM 680277100 492,037 49,233 11.12 7,139 28.08 0.0009
2022-02-11 2021-12-31 13F OLD SECOND BANCORP COM 680277100 442,804 -2,502 -0.56 5,574 -4.14 0.0007
2021-11-12 2021-09-30 13F OLD SECOND BANCORP COM 680277100 445,306 617 0.14 5,815 5.46 0.0008
2021-08-13 2021-06-30 13F OLD SECOND BANCORP COM 680277100 444,689 -10,156 -2.23 5,514 -8.22 0.0008
2021-05-12 2021-03-31 13F OLD SECOND BANCORP COM 680277100 454,845 32,756 7.76 6,008 40.93 0.0009
2021-02-12 2020-12-31 13F OLD SECOND BANCORP COM 680277100 422,089 72 0.02 4,263 34.78 0.0007
2020-11-13 2020-09-30 13F OLD SECOND BANCORP COM 680277100 422,017 9,777 2.37 3,163 -1.34 0.0006
2020-08-13 2020-06-30 13F OLD SECOND BANCORP COM 680277100 412,240 6,536 1.61 3,206 14.38 0.0007
2020-05-14 2020-03-31 13F OLD SECOND BANCORP COM 680277100 405,704 29,385 7.81 2,803 -44.70 0.0007
2020-02-20 2019-12-31 13F/A-1 OLD SECOND BANCORP COM 680277100 376,319 12,788 3.52 5,069 14.12 0.0011
2020-02-13 2019-12-31 13F OLD SECOND BANCORP COM 680277100 376,319 12,788 5,069 645.9996
2019-11-12 2019-09-30 13F OLD SECOND BANCORP COM 680277100 363,531 6,870 1.93 4,442 -2.46 0.0010
2019-08-14 2019-06-30 13F OLD SECOND BANCORP COM 680277100 356,661 27,518 8.36 4,554 9.92 0.0011
2019-05-14 2019-03-31 13F OLD SECOND BANCORP COM 680277100 329,143 18,585 5.98 4,143 2.65 0.0011
2019-03-06 2018-12-31 13F/A-1 OLD SECOND BANCORP COM 680277100 310,558 15,933 5.41 4,036 -11.32 0.0012
2019-02-13 2018-12-31 13F OLD SECOND BANCORP COM 680277100 310,558 15,933 4,036
2018-11-13 2018-09-30 13F OLD SECOND BANCORP COM 680277100 294,625 21,644 7.93 4,551 15.80 0.0013
2018-08-14 2018-06-30 13F OLD SECOND BANCORP COM 680277100 272,981 21,721 8.64 3,930 12.54 0.0012
2018-05-15 2018-03-31 13F OLD SECOND BANCORP COM 680277100 251,260 10,007 4.15 3,492 6.04 0.0011
2018-02-13 2017-12-31 13F OLD SECOND BANCORP COM 680277100 241,253 1,934 0.81 3,293 2.33 0.0011
2017-11-14 2017-09-30 13F OLD SECOND BANCORP COM 680277100 239,319 17,845 8.06 3,218 25.80 0.0012
2017-08-14 2017-06-30 13F OLD SECOND BANCORP COM 680277100 221,474 10,518 4.99 2,558 7.80 0.0010
2017-06-21 2017-03-31 13F/A-1 OLD SECOND BANCORP INC ILL COM COM 680277100 210,956 6,603 3.23 2,373 5.09 0.0010
2017-05-12 2017-03-31 13F OLD SECOND BANCORP INC ILL COM COM 680277100 210,956 2,373
2017-02-14 2016-12-31 13F OLD SECOND BANCORP INC ILL COM COM 680277100 204,353 4,929 2.47 2,258 36.27 0.0011
2016-11-10 2016-09-30 13F OLD SECOND BANCORP INC ILL COM COM 680277100 199,424 32,614 19.55 1,657 45.48 0.0008
2016-08-12 2016-06-30 13F OLD SECOND BANCORP INC ILL COM COM 680277100 166,810 -1,705 -1.01 1,139 -5.71 0.0006
2016-05-13 2016-03-31 13F OLD SECOND BANCORP INC ILL COM COM 680277100 168,515 5,431 3.33 1,208 -5.48 0.0006
2016-02-12 2015-12-31 13F OLD SECOND BANCORP INC ILL COM COM 680277100 163,084 5,544 3.52 1,278 30.28 0.0007
2015-11-13 2015-09-30 13F OLD SECOND BANCORP INC ILL COM COM 680277100 157,540 30,571 24.08 981 17.20 0.0006
2015-08-14 2015-06-30 13F OLD SECOND BANCORP INC ILL COM COM 680277100 126,969 21,309 20.17 837 38.58 0.0005
2015-05-14 2015-03-31 13F OLD SECOND BANCORP INC ILL COM COM 680277100 105,660 534 0.51 604 7.09 0.0003
2015-02-12 2014-12-31 13F OLD SECOND BANCORP INC ILL COM COM 680277100 105,126 -966 -0.91 564 10.59 0.0003
2014-11-14 2014-09-30 13F OLD SECOND BANCORP INC ILL COM COM 680277100 106,092 17,557 19.83 510 15.91 0.0003
2014-08-13 2014-06-30 13F OLD SECOND BANCORP INC ILL COM COM 680277100 88,535 32,907 59.16 440 72.55 0.0003
2014-05-14 2014-03-31 13F OLD SECOND BANCORP INC ILL COM COM 680277100 55,628 180 0.32 255 0.00 0.0002
2014-02-14 2013-12-31 13F OLD SECOND BANCORP INC ILL COM COM 680277100 55,448 120 0.22 255 -19.05 0.0002
2013-11-14 2013-09-30 13F OLD SECOND BANCORP INC ILL COM COM 680277100 55,328 120 0.22 315 3.28 0.0003
2013-08-14 2013-06-30 13F OLD SECOND BANCORP INC ILL COM COM 680277100 55,208 55,208 305 0.0003
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.