Old Second Bancorp, Inc.
DE ˙ DB ˙ US6802771005
18,10 € ↑0,30 (1,69%)
2026-06-03
DEL PRIS
SecurityDE:OSB / Old Second Bancorp, Inc.
InstitutionBarclays Plc
Latest Disclosed Ownership143,188 shares
Latest Disclosed Value $ 2,792,169
Barclays Plc reports 22.82% increase in ownership of OSB / Old Second Bancorp, Inc.

On February 13, 2026 - Barclays Plc filed a 13F-HR form disclosing ownership of 143,188 shares of Old Second Bancorp, Inc. (DE:OSB) valued at $2,376,921 USD as of December 31, 2025. The entity filed a previous 13F-HR/A on March 31, 2026 disclosing 116,579 shares of Old Second Bancorp, Inc.. This represents a change in shares of 22.82% during the quarter. The current value of the position is $2,591,703 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.

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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)
2026-02-13 2025-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 143,188 26,609 22.82 2,792 38.56 0.0007
2026-03-31 2025-09-30 13F/A-3 OLD SECOND BANCORP INC ILL COM 680277100 116,579 -16,898 -12.66 2,015 -14.87 0.0004
2026-03-19 2025-09-30 13F/A-2 OLD SECOND BANCORP INC ILL COM 680277100 116,582 -16,895 1,818 0.0005
2025-11-12 2025-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 116,579 -16,898 2,015 0.0004
2026-02-27 2025-06-30 13F/A-2 OLD SECOND BANCORP INC ILL COM 680277100 133,477 37,514 39.09 2,368 48.31 0.0005
2025-08-14 2025-06-30 13F/A-1 OLD SECOND BANCORP INC ILL COM 680277100 133,477 37,514 2 0.0005
2025-08-13 2025-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 133,477 37,514 2 0.0002
2026-03-17 2025-03-31 13F/A-1 OLD SECOND BANCORP INC ILL COM 680277100 95,963 -30,681 -24.23 1,597 -29.10 0.0005
2025-05-15 2025-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 95,963 -30,681 2 0.0005
2026-03-19 2024-12-31 13F/A-1 OLD SECOND BANCORP INC ILL COM 680277100 126,644 10,062 8.63 2,252 23.89 0.0006
2025-02-13 2024-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 126,644 10,062 2 0.0006
2026-03-31 2024-09-30 13F/A-2 OLD SECOND BANCORP INC ILL COM 680277100 116,582 52,277 81.30 1,818 90.86 0.0005
2024-11-19 2024-09-30 13F/A-1 OLD SECOND BANCORP INC ILL COM 680277100 116,582 52,277 2 0.0005
2024-11-15 2024-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 116,582 52,277 2 0.0001
2026-03-23 2024-06-30 13F/A-1 OLD SECOND BANCORP INC ILL COM 680277100 64,305 -27,099 -29.65 952 -24.74 0.0003
2024-08-14 2024-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 64,305 -27,099 1 0.0003
2026-03-24 2024-03-31 13F/A-1 OLD SECOND BANCORP INC ILL COM 680277100 91,404 -22,877 -20.02 1,265 -28.29 0.0004
2024-05-15 2024-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 91,404 -22,877 1 0.0004
2026-03-25 2023-12-31 13F/A-1 OLD SECOND BANCORP INC ILL COM 680277100 114,281 41,150 56.27 1,764 77.29 0.0006
2024-02-15 2023-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 114,281 41,150 2 0.0006
2026-03-26 2023-09-30 13F/A-1 OLD SECOND BANCORP INC ILL COM 680277100 73,131 -3,966 -5.14 995 -1.09 0.0006
2023-11-07 2023-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 73,131 -3,966 1 0.0006
2026-03-30 2023-06-30 13F/A-2 OLD SECOND BANCORP INC ILL COM 680277100 77,097 2,671 3.59 1,007 -3.82 0.0006
2023-09-20 2023-06-30 13F/A-1 OLD SECOND BANCORP INC ILL COM 680277100 77,097 2,671 1 0.0006
2023-08-03 2023-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 77,097 2,671 1 0.0006
2026-03-30 2023-03-31 13F/A-1 OLD SECOND BANCORP INC ILL COM 680277100 74,426 21,235 39.92 1,046 22.63 0.0005
2023-05-04 2023-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 74,426 21,235 1 0.0005
2026-03-30 2022-12-31 13F/A-1 OLD SECOND BANCORP INC ILL COM 680277100 53,191 9,080 20.58 853 48.09 0.0004
2023-02-13 2022-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 53,191 9,080 1 0.0004
2022-11-03 2022-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 44,111 -165 -0.37 576 -2.70 0.0006
2022-08-12 2022-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 44,276 3,084 7.49 592 -1.00 0.0004
2022-05-16 2022-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 41,192 -29,182 -41.47 598 -32.58 0.0005
2022-02-23 2021-12-31 13F/A-1 OLD SECOND BANCORP INC ILL COM 680277100 70,374 22,346 46.53 887 41.47 0.0003
2022-02-14 2021-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 70,374 22,346 887 0.0003
2021-11-09 2021-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 48,028 15,700 48.56 627 55.97 0.0003
2021-08-13 2021-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 32,328 8,558 36.00 402 28.03 0.0002
2021-05-13 2021-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 23,770 14,592 158.99 314 237.63 0.0002
2021-02-11 2020-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 9,178 -4,100 -30.88 93 -7.00 0.0000
2020-11-12 2020-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 13,278 -2,766 -17.24 100 -19.35 0.0001
2020-08-12 2020-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 16,044 6,434 66.95 124 85.07 0.0001
2020-05-13 2020-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 9,610 -19,942 -67.48 67 -83.17 0.0001
2020-02-10 2019-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 29,552 14,819 100.58 398 121.11 0.0002
2019-11-15 2019-09-30 13F/A-1 OLD SECOND BANCORP INC ILL COM 680277100 14,733 -4,566 -23.66 180 -27.13 0.0001
2019-11-14 2019-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 14,733 -4,566 180 41.6162
2019-08-14 2019-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 19,299 6,588 51.83 247 54.38 0.0002
2019-05-15 2019-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 12,711 11,727 1,191.77 160 1,130.77 0.0001
2019-02-14 2018-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 984 -11,995 -92.42 13 -93.50 0.0000
2018-11-14 2018-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 12,979 4,295 49.46 200 61.29 0.0001
2018-08-14 2018-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 8,684 2,682 44.69 124 49.40 0.0001
2018-05-15 2018-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 6,002 638 11.89 83 12.16 0.0001
2018-02-14 2017-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 5,364 4,694 700.60 74 722.22 0.0001
2017-11-14 2017-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 670 148 28.35 9 50.00 0.0000
2017-08-14 2017-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 522 217 71.15 6 50.00 0.0000
2017-05-15 2017-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 305 -236 -43.62 4 -33.33 0.0000
2017-02-14 2016-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 541 184 51.54 6 100.00 0.0000
2016-11-14 2016-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 357 304 573.58 3 0.0000
2016-08-12 2016-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 53 53 0.00 0 0.0000
2016-02-12 2015-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 0 -180 -100.00 0 -100.00
2015-11-13 2015-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 180 -384 -68.09 1 -66.67 0.0000
2015-08-14 2015-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 564 564 3 0.0000
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.