Old Second Bancorp, Inc.
DE ˙ DB ˙ US6802771005
18,10 € ↑0,30 (1,69%)
2026-06-03
AKTIENPREIS
SecurityDE:OSB / Old Second Bancorp, Inc.
InstitutionUBS Group AG
Latest Disclosed Ownership259,274 shares
Latest Disclosed Value $ 5,226,964
UBS Group AG reports 46.40% increase in ownership of OSB / Old Second Bancorp, Inc.

On May 5, 2026 - UBS Group AG filed a 13F-HR form disclosing ownership of 259,274 shares of Old Second Bancorp, Inc. (DE:OSB) valued at $4,433,585 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 177,102 shares of Old Second Bancorp, Inc.. This represents a change in shares of 46.40% during the quarter. The current value of the position is $4,692,859 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)
2026-05-05 2026-03-31 13F OLD SECOND BANCORP INC DEL COM 680277100 259,274 82,172 46.40 5,227 51.35 0.0001
2026-01-29 2025-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 177,102 132,290 295.21 3,453 346.12 0.0001
2025-11-13 2025-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 44,812 7,541 20.23 775 17.10 0.0001
2025-08-14 2025-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 37,271 -12,466 -25.06 661 -20.07 0.0001
2025-05-13 2025-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 49,737 -1,666 -3.24 828 -9.42 0.0002
2025-02-14 2024-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 51,403 13,974 37.33 914 56.60 0.0002
2024-11-14 2024-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 37,429 9,338 33.24 584 40.14 0.0001
2024-08-14 2024-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 28,091 -22,933 -44.95 416 -41.08 0.0001
2024-05-13 2024-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 51,024 -12,045 -19.10 706 -27.44 0.0002
2024-02-09 2023-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 63,069 31,019 96.78 974 123.17 0.0003
2023-11-09 2023-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 32,050 5,492 20.68 436 26.01 0.0002
2023-08-11 2023-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 26,558 3,984 17.65 347 9.15 0.0001
2023-05-12 2023-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 22,574 3,694 19.57 317 4.97 0.0001
2023-02-08 2022-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 18,880 2,318 14.00 303 39.81 0.0001
2022-11-10 2022-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 16,562 5,494 49.64 216 45.95 0.0001
2022-08-10 2022-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 11,068 6,471 140.77 148 120.90 0.0001
2022-05-16 2022-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 4,597 -7,451 -61.84 67 -55.92 0.0000
2022-02-14 2021-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 12,048 12,003 26,673.33 152 15,100.00 0.0000
2021-11-15 2021-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 45 33 275.00 1 0.0000
2021-08-13 2021-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 12 -5,603 -99.79 0 -100.00
2021-05-12 2021-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 5,615 899 19.06 74 54.17 0.0000
2021-02-11 2020-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 4,716 4,716 48 0.0000
2020-11-12 2020-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 0 -14,395 -100.00 0 -100.00
2020-07-31 2020-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 14,395 -7,812 -35.18 112 -26.80 0.0000
2020-05-01 2020-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 22,207 -21,099 -48.72 153 -73.76 0.0001
2020-02-14 2019-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 43,306 14,645 51.10 583 66.10 0.0002
2019-11-14 2019-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 28,661 18,198 173.93 351 163.91 0.0001
2019-08-14 2019-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 10,463 5,183 98.16 133 101.52 0.0001
2019-05-14 2019-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 5,280 -10,597 -66.74 66 -68.12 0.0000
2019-02-14 2018-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 15,877 2,638 19.93 207 0.98 0.0001
2018-11-14 2018-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 13,239 4,248 47.25 205 58.91 0.0001
2018-08-14 2018-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 8,991 3,711 70.28 129 76.71 0.0001
2018-05-15 2018-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 5,280 -1,419 -21.18 73 -19.78 0.0000
2018-02-14 2017-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 6,699 -1,095 -14.05 91 -13.33 0.0000
2017-11-14 2017-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 7,794 -557 -6.67 105 9.38 0.0000
2017-11-14 2017-06-30 13F/A-1 OLD SECOND BANCORP INC ILL COM 680277100 8,351 1,411 20.33 96 23.08 0.0000
2017-08-14 2017-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 8,351 1,411 96
2017-11-14 2017-03-31 13F/A-1 OLD SECOND BANCORP INC ILL COM 680277100 6,940 -5,581 -44.57 78 -43.48 0.0000
2017-05-12 2017-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 6,940 -5,581 78
2017-02-14 2016-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 12,521 6,521 108.68 138 176.00 0.0001
2016-11-14 2016-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 6,000 220 3.81 50 28.21 0.0000
2016-08-12 2016-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 5,780 -1,330 -18.71 39 -23.53 0.0000
2016-05-12 2016-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 7,110 831 13.23 51 4.08 0.0000
2016-02-16 2015-12-31 13F OLD SECOND BANCORP INC ILL COM 680277100 6,279 3,527 128.16 49 188.24 0.0000
2015-11-13 2015-09-30 13F OLD SECOND BANCORP INC ILL COM 680277100 2,752 1,384 101.17 17 88.89 0.0000
2015-08-14 2015-06-30 13F OLD SECOND BANCORP INC ILL COM 680277100 1,368 590 75.84 9 125.00 0.0000
2015-05-14 2015-03-31 13F OLD SECOND BANCORP INC ILL COM 680277100 778 778 4 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.