Duke Energy Corporation
US ˙ NYSE ˙ US26441C2044

SecurityDUK / Duke Energy Corporation
InstitutionOld Second National Bank Of Aurora
Latest Disclosed Ownership1,726 shares
Latest Disclosed Value $ 226,003
Old Second National Bank Of Aurora ownership in DUK / Duke Energy Corporation

On April 21, 2026 - Old Second National Bank Of Aurora filed a 13F-HR form disclosing ownership of 1,726 shares of Duke Energy Corporation (US:DUK) valued at $226,002 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 27, 2026 disclosing 1,726 shares of Duke Energy Corporation. This represents a change in shares of 0.00% during the quarter. The current value of the position is $208,915 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)
2026-04-21 2026-03-31 13F Duke Energy Com 26441C204 1,726 0 0.00 226 11.88 0.0467
2026-01-27 2025-12-31 13F Duke Energy Com 26441C204 1,726 -30 -1.71 202 -6.91 0.0405
2025-10-22 2025-09-30 13F Duke Energy Com 26441C204 1,756 30 1.74 217 6.90 0.0448
2025-07-21 2025-06-30 13F Duke Energy Com 26441C204 1,726 0 0.00 204 -3.33 0.0445
2025-04-21 2025-03-31 13F Duke Energy Com 26441C204 1,726 -100 -5.48 211 7.14 0.0496
2025-01-23 2024-12-31 13F Duke Energy Com 26441C204 1,826 88 5.06 197 -2.00 0.0447
2024-11-05 2024-09-30 13F Duke Energy Com 26441C204 1,738 0 0.00 200 14.94 0.0484
2024-08-12 2024-06-30 13F Duke Energy Com 26441C204 1,738 0 0.00 174 3.57 0.0447
2024-05-06 2024-03-31 13F Duke Energy Com 26441C204 1,738 0 0.00 168 0.00 0.0437
2024-01-31 2023-12-31 13F Duke Energy Com 26441C204 1,738 -179 -9.34 169 -0.59 0.0464
2023-10-25 2023-09-30 13F Duke Energy Com 26441C204 1,917 0 0.00 169 -1.74 0.0515
2023-07-25 2023-06-30 13F Duke Energy Com 26441C204 1,917 0 0.00 172 -6.52 0.0498
2023-05-03 2023-03-31 13F Duke Energy Com 26441C204 1,917 -1,372 -41.71 185 -45.56 0.0539
2023-02-09 2022-12-31 13F Duke Energy Com 26441C204 3,289 270 8.94 339 20.71 0.1001
2022-10-24 2022-09-30 13F Duke Energy Com 26441C204 3,019 0 0.00 280 -13.58 0.0861
2022-08-05 2022-06-30 13F Duke Energy Com 26441C204 3,019 1,865 161.61 324 151.16 0.0904
2022-05-10 2022-03-31 13F Duke Energy Corp Com 26441C204 1,154 -1,739 -60.11 129 -52.57 0.0226
2022-05-10 2022-03-31 13F Duke Energy Corp Com 26441C204 3,019 337
2022-01-25 2021-12-31 13F Duke Energy Corp Com 26441C204 2,893 -126 -4.17 272 -7.80 0.0806
2021-12-06 2021-09-30 13F Duke Energy Corp Com 26441C204 3,019 76 2.58 295 1.37 0.0796
2021-08-30 2021-06-30 13F Duke Energy Corp Com 26441C204 2,943 0 0.00 291 2.46 0.0799
2021-05-07 2021-03-31 13F Duke Energy Corp Com 26441C204 2,943 50 1.73 284 7.58 0.0792
2021-02-01 2020-12-31 13F Duke Energy Corp Com 26441C204 2,893 -125 -4.14 264 -1.12 0.0783
2020-10-28 2020-09-30 13F Duke Energy Corp Com 26441C204 3,018 -39 -1.28 267 9.43 0.0877
2020-07-31 2020-06-30 13F Duke Energy Corp Com 26441C204 3,057 0 0.00 244 -1.21 0.0828
2020-04-28 2020-03-31 13F Duke Energy Corp Com 26441C204 3,057 50 1.66 247 -10.18 0.0980
2020-01-21 2019-12-31 13F Duke Energy Corp Com 26441C204 3,007 0 0.00 275 -4.84 0.0826
2019-10-25 2019-09-30 13F Duke Energy Corp Com 26441C204 3,007 87 2.98 289 12.45 0.0968
2019-07-18 2019-06-30 13F Duke Energy Corp Com 26441C204 2,920 0 0.00 257 -2.28 0.0909
2019-04-25 2019-03-31 13F Duke Energy Corp Com 26441C204 2,920 114 4.06 263 8.68 0.0942
2019-01-18 2018-12-31 13F Duke Energy Corp Com 26441C204 2,806 50 1.81 242 9.50 0.0985
2018-10-24 2018-09-30 13F Duke Energy Corp Com 26441C204 2,756 -100 -3.50 221 -1.78 0.0806
2018-07-25 2018-06-30 13F Duke Energy Corp Com 26441C204 2,856 -154 -5.12 225 -3.43 0.0880
2018-04-25 2018-03-31 13F Duke Energy Corp Com 26441C204 3,010 0 0.00 233 -7.91 0.0930
2018-01-17 2017-12-31 13F Duke Energy Corp Com 26441C204 3,010 -38 -1.25 253 -1.17 0.1002
2017-10-19 2017-09-30 13F Duke Energy Corp Com 26441C204 3,048 438 16.78 256 17.43 0.1065
2017-07-24 2017-06-30 13F Duke Energy Corp Com 26441C204 2,610 0 0.00 218 1.87 0.0937
2017-04-18 2017-03-31 13F Duke Energy Corp Com 26441C204 2,610 95 3.78 214 9.74 0.0957
2017-01-31 2016-12-31 13F Duke Energy Corp Com 26441C204 2,515 0 0.00 195 -2.99 0.0875
2016-10-25 2016-09-30 13F Duke Energy Corp Com 26441C204 2,515 -133 -5.02 201 -11.45 0.0922
2016-07-21 2016-06-30 13F Duke Energy Corp Com 26441C204 2,648 0 0.00 227 6.57 0.1058
2016-04-21 2016-03-31 13F Duke Energy Corp Com 26441C204 2,648 0 0.00 213 12.70 0.1022
2016-01-21 2015-12-31 13F Duke Energy Corp Com 26441C204 2,648 0 0.00 189 -1.05 0.0924
2015-10-20 2015-09-30 13F Duke Energy Corp Com 26441C204 2,648 0 0.00 191 2.14 0.0960
2015-07-29 2015-06-30 13F Duke Energy Corp Com 26441C204 2,648 200 8.17 187 -0.53 0.0849
2015-04-23 2015-03-31 13F Duke Energy Corp Com 26441C204 2,448 2,448 188 0.0834
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.