Old Second Bancorp, Inc.
DE ˙ DB ˙ US6802771005
18,20 € ↑0,60 (3,41%)
2026-06-05
DEL PRIS
SecurityDE:OSB / Old Second Bancorp, Inc.
InstitutionFirst Trust Advisors Lp
Latest Disclosed Ownership18,760 shares
Latest Disclosed Value $ 378,201
First Trust Advisors Lp reports 10.29% decrease in ownership of OSB / Old Second Bancorp, Inc.

On May 13, 2026 - First Trust Advisors Lp filed a 13F-HR form disclosing ownership of 18,760 shares of Old Second Bancorp, Inc. (DE:OSB) valued at $320,796 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 20,911 shares of Old Second Bancorp, Inc.. This represents a change in shares of -10.29% during the quarter. The current value of the position is $341,432 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)
2026-05-13 2026-03-31 13F OLD SECOND BANCORP INC DEL COM 680277100 18,760 -2,151 -10.29 378 -7.13 0.0003
2026-02-13 2025-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 20,911 -8,255 -28.30 408 -19.25 0.0003
2025-11-12 2025-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 29,166 229 0.79 504 -1.75 0.0004
2025-08-13 2025-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 28,937 1,752 6.44 513 13.50 0.0004
2025-05-14 2025-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 27,185 -112 -0.41 452 -6.80 0.0004
2025-02-13 2024-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 27,297 164 0.60 485 14.66 0.0004
2024-11-13 2024-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 27,133 -101,983 -78.99 423 -77.88 0.0004
2024-08-13 2024-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 129,116 -6,802 -5.00 1,912 1.65 0.0019
2024-05-13 2024-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 135,918 2,241 1.68 1,881 -8.82 0.0019
2024-02-13 2023-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 133,677 10,527 8.55 2,064 23.09 0.0023
2023-11-13 2023-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 123,150 -173 -0.14 1,676 4.10 0.0020
2023-08-14 2023-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 123,323 -3,397 -2.68 1,611 -9.60 0.0018
2023-05-15 2023-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 126,720 -6,120 -4.61 1,782 -16.38 0.0021
2023-02-09 2022-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 132,840 12,766 10.63 2,131 35.93 0.0025
2022-11-14 2022-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 120,074 101,218 536.79 1,567 521.83 0.0020
2022-08-12 2022-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 18,856 4,232 28.94 252 18.87 0.0003
2022-05-13 2022-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 14,624 1,302 9.77 212 26.19 0.0002
2022-02-08 2021-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 13,322 909 7.32 168 3.70 0.0002
2021-11-15 2021-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 12,413 -68,125 -84.59 162 -83.78 0.0002
2021-10-12 2021-06-30 13F/A-1 OLD SECOND BANCORP INC ILL COM 680277100 80,538 -2,411 -2.91 999 -8.85 0.0011
2021-08-16 2021-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 80,538 -2,411 999 0.0010
2021-05-14 2021-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 82,949 8,162 10.91 1,096 45.17 0.0013
2021-02-02 2020-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 74,787 -2,613 -3.38 755 30.17 0.0010
2020-11-05 2020-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 77,400 12,156 18.63 580 14.17 0.0009
2020-07-22 2020-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 65,244 711 1.10 508 13.90 0.0009
2020-05-06 2020-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 64,533 -11,999 -15.68 446 -56.74 0.0010
2020-02-03 2019-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 76,532 -1,892 -2.41 1,031 7.62 0.0018
2019-11-04 2019-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 78,424 9,384 13.59 958 8.62 0.0018
2019-07-30 2019-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 69,040 -4,237 -5.78 882 -4.44 0.0017
2019-06-19 2019-03-31 13F/A-1 OLD SECOND BANCORP INC ILL COM 680277100 73,277 -5,257 -6.69 923 -9.60 0.0018
2019-05-09 2019-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 73,277 -5,257 923
2019-02-07 2018-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 78,534 -4,259 -5.14 1,021 -20.17 0.0024
2018-10-25 2018-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 82,793 7,034 9.28 1,279 17.23 0.0024
2018-08-02 2018-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 75,759 12,654 20.05 1,091 24.40 0.0023
2018-04-23 2018-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 63,105 864 1.39 877 3.18 0.0020
2018-02-08 2017-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 62,241 1,071 1.75 850 3.28 0.0020
2017-10-24 2017-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 61,170 14,815 31.96 823 53.83 0.0021
2017-08-02 2017-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 46,355 -8,202 -15.03 535 -12.87 0.0014
2017-05-02 2017-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 54,557 4,693 9.41 614 11.43 0.0017
2017-02-06 2016-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 49,864 49,864 551 0.0016
2016-11-01 2016-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 0 -15,254 -100.00 0 -100.00
2016-08-04 2016-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 15,254 -29,188 -65.68 104 -67.40 0.0003
2016-05-10 2016-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 44,442 -7,894 -15.08 319 -22.20 0.0010
2016-05-04 2015-12-31 13F/A-1 OLD SECOND BANCORP INC ILL COM 680277100 52,336 35,519 211.21 410 290.48 0.0011
2016-02-03 2015-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 52,336 410
2015-11-05 2015-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 16,817 16,817 105 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.