Duke Energy Corporation
US ˙ NYSE ˙ US26441C2044

SecurityDUK / Duke Energy Corporation
InstitutionMassachusetts Financial Services Co /ma/
Latest Disclosed Ownership14,391,296 shares
Latest Disclosed Value $ 1,901,897,496
Massachusetts Financial Services Co /ma/ reports 10.30% decrease in ownership of DUK / Duke Energy Corporation

On May 14, 2026 - Massachusetts Financial Services Co /ma/ filed a 13F-HR form disclosing ownership of 14,391,296 shares of Duke Energy Corporation (US:DUK) valued at $1,884,396,298 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 22, 2026 disclosing 16,044,472 shares of Duke Energy Corporation. This represents a change in shares of -10.30% during the quarter. The current value of the position is $1,741,922,468 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)
2026-05-14 2026-03-31 13F DUKE ENERGY CORP COM NEW 26441C204 14,391,296 -1,653,176 -10.30 1,901,897 1.13 0.6393
2026-01-22 2025-12-31 13F DUKE ENERGY CORP COM NEW 26441C204 16,044,472 -825,100 -4.89 1,880,573 -9.92 0.6064
2025-10-29 2025-09-30 13F DUKE ENERGY CORP COM NEW 26441C204 16,869,572 -305,238 -1.78 2,087,610 3.01 0.6467
2025-08-08 2025-06-30 13F DUKE ENERGY CORP COM NEW 26441C204 17,174,810 -932,815 -5.15 2,026,628 -8.24 0.6432
2025-05-02 2025-03-31 13F DUKE ENERGY CORP COM NEW 26441C204 18,107,625 9,829 0.05 2,208,587 13.27 0.7342
2025-02-12 2024-12-31 13F DUKE ENERGY CORP COM NEW 26441C204 18,097,796 124,863 0.69 1,949,857 -5.91 0.6153
2024-11-12 2024-09-30 13F DUKE ENERGY CORP COM NEW 26441C204 17,972,933 -301,658 -1.65 2,072,279 13.14 0.6189
2024-08-09 2024-06-30 13F DUKE ENERGY CORP COM NEW 26441C204 18,274,591 -331,983 -1.78 1,831,662 1.79 0.5630
2024-05-14 2024-03-31 13F DUKE ENERGY CORP COM NEW 26441C204 18,606,574 -92,910 -0.50 1,799,442 -0.84 0.5376
2024-02-08 2023-12-31 13F DUKE ENERGY CORP COM NEW 26441C204 18,699,484 -584,412 -3.03 1,814,598 6.62 0.5860
2023-11-08 2023-09-30 13F DUKE ENERGY CORP COM NEW 26441C204 19,283,896 14,762 0.08 1,701,997 -1.57 0.5960
2023-08-09 2023-06-30 13F DUKE ENERGY CORP COM NEW 26441C204 19,269,134 54,872 0.29 1,729,212 -6.71 0.5677
2023-05-10 2023-03-31 13F DUKE ENERGY CORP COM NEW 26441C204 19,214,262 -142,034 -0.73 1,853,600 -7.02 0.6344
2023-02-13 2022-12-31 13F DUKE ENERGY CORP COM NEW 26441C204 19,356,296 -739,984 -3.68 1,993,505 6.64 0.6959
2022-11-09 2022-09-30 13F DUKE ENERGY CORP COM NEW 26441C204 20,096,280 -443,779 -2.16 1,869,356 -15.11 0.6989
2022-08-09 2022-06-30 13F DUKE ENERGY CORP COM NEW 26441C204 20,540,059 -1,392,235 -6.35 2,202,099 -10.08 0.7592
2022-05-11 2022-03-31 13F DUKE ENERGY CORP COM NEW 26441C204 21,932,294 -1,686,036 -7.14 2,448,961 -1.15 0.7258
2022-02-10 2021-12-31 13F DUKE ENERGY CORP COM NEW 26441C204 23,618,330 -906,132 -3.69 2,477,564 3.52 0.6783
2021-11-10 2021-09-30 13F DUKE ENERGY CORP COM NEW 26441C204 24,524,462 -782,813 -3.09 2,393,341 -4.20 0.7002
2021-08-13 2021-06-30 13F DUKE ENERGY CORP COM NEW 26441C204 25,307,275 -572,207 -2.21 2,498,336 0.01 0.7278
2021-05-13 2021-03-31 13F DUKE ENERGY CORP COM NEW 26441C204 25,879,482 -135,067 -0.52 2,498,147 104,820.08 0.7680
2021-05-12 2020-12-31 13F/A-1 DUKE ENERGY CORP COM NEW 26441C204 26,014,549 300,327 1.17 2,382 4.57 0.7647
2021-02-12 2020-12-31 13F DUKE ENERGY CORP COM NEW 26441C204 26,014,549 300,327 2,382 0.7647
2020-11-12 2020-09-30 13F DUKE ENERGY CORP COM NEW 26441C204 25,714,222 355,234 1.40 2,277 12.44 0.8250
2020-11-20 2020-06-30 13F/A-1 DUKE ENERGY CORP COM NEW 26441C204 25,358,988 674,836 2.73 2,026 -99.90 0.7989
2020-08-11 2020-06-30 13F DUKE ENERGY CORP COM NEW 26441C204 25,358,988 674,836 2,025,929 799,470.5883
2020-11-20 2020-03-31 13F/A-1 DUKE ENERGY CORP COM NEW 26441C204 24,684,152 403,703 1.66 1,996,454 -9.85 0.9518
2020-05-14 2020-03-31 13F DUKE ENERGY CORP COM NEW 26441C204 24,684,152 403,703 1,996,454 952,470.3801
2020-11-25 2019-12-31 13F/A-1 DUKE ENERGY CORP COM NEW 26441C204 24,280,449 2,961,767 13.89 2,214,620 108,300.39 0.8324
2020-02-13 2019-12-31 13F DUKE ENERGY CORP COM NEW 26441C204 24,280,449 2,961,767 2,214,620 833,031.8889
2020-11-20 2019-09-30 13F/A-1 DUKE ENERGY CORP COM NEW 26441C204 21,318,682 990,017 4.87 2,044 -99.89 0.8204
2019-11-05 2019-09-30 13F DUKE ENERGY CORP COM NEW 26441C204 21,318,682 990,017 2,043,609 821,089.3616
2019-08-14 2019-06-30 13F DUKE ENERGY CORP COM NEW 26441C204 20,328,665 1,947,264 10.59 1,793,801 8.43 0.7309
2019-05-13 2019-03-31 13F DUKE ENERGY CORP COM NEW 26441C204 18,381,401 -996,276 -5.14 1,654,327 -1.07 0.6972
2019-02-08 2018-12-31 13F DUKE ENERGY CORP COM NEW 26441C204 19,377,677 -484,351 -2.44 1,672,294 5.22 0.8027
2018-10-25 2018-09-30 13F DUKE ENERGY CORP COM NEW 26441C204 19,862,028 121,046 0.61 1,589,358 1.81 0.6545
2018-07-30 2018-06-30 13F DUKE ENERGY CORP COM NEW 26441C204 19,740,982 317,835 1.64 1,561,116 3.75 0.6689
2018-05-04 2018-03-31 13F DUKE ENERGY CORP COM NEW 26441C204 19,423,147 3,718,916 23.68 1,504,711 13.92 0.6447
2018-02-14 2017-12-31 13F DUKE ENERGY CORP COM NEW 26441C204 15,704,231 1,592,971 11.29 1,320,882 11.54 0.5537
2017-11-14 2017-09-30 13F DUKE ENERGY CORP COM NEW 26441C204 14,111,260 1,445,492 11.41 1,184,217 11.75 0.5142
2017-08-14 2017-06-30 13F DUKE ENERGY CORP COM NEW 26441C204 12,665,768 3,243,705 34.43 1,059,732 37.15 0.4702
2017-05-12 2017-03-31 13F DUKE ENERGY CORP COM NEW 26441C204 9,422,063 2,345,114 33.14 772,704 40.67 0.3618
2017-05-09 2016-12-31 13F/A-1 DUKE ENERGY CORP COM NEW 26441C204 7,076,949 295,836 4.36 549,313 1.21 0.2686
2017-02-13 2016-12-31 13F DUKE ENERGY CORP COM NEW 26441C204 7,076,949 295,836 549,313 268,919.3662
2017-05-09 2016-09-30 13F/A-1 DUKE ENERGY CORP COM NEW 26441C204 6,781,113 522,840 8.35 542,760 1.09 0.2643
2016-11-14 2016-09-30 13F DUKE ENERGY CORP COM NEW 26441C204 6,781,113 522,840 542,760 264,478.0666
2017-05-09 2016-06-30 13F/A-1 DUKE ENERGY CORP COM NEW 26441C204 6,258,273 -229,416 -3.54 536,897 2.57 0.2704
2016-08-12 2016-06-30 13F DUKE ENERGY CORP COM NEW 26441C204 6,258,273 -229,416 536,897 270,610.3656
2017-05-09 2016-03-31 13F/A-1 DUKE ENERGY CORP COM NEW 26441C204 6,487,689 362,417 5.92 523,427 19.70 0.2719
2016-05-12 2016-03-31 13F DUKE ENERGY CORP COM NEW 26441C204 6,487,689 2,767,759 523,427 272,096.9566
2016-02-12 2015-12-31 13F DUKE ENERGY CORP COM NEW 26441C204 6,125,272 -280,318 -4.38 437,283 -5.11 0.2335
2015-11-12 2015-09-30 13F DUKE ENERGY CORP COM NEW 26441C204 6,405,590 64,689 1.02 460,818 2.91 0.2575
2015-08-13 2015-06-30 13F DUKE ENERGY CORP COM NEW 26441C204 6,340,901 839,711 15.26 447,794 6.02 0.2277
2015-05-13 2015-03-31 13F DUKE ENERGY CORP COM NEW 26441C204 5,501,190 3,288,756 148.65 422,381 128.53 0.2137
2015-02-13 2014-12-31 13F DUKE ENERGY CORP COM NEW 26441C204 2,212,434 -1,507,496 -40.52 184,827 -33.55 0.0940
2014-11-13 2014-09-30 13F DUKE ENERGY CORP COM NEW 26441C204 3,719,930 -274,206 -6.87 278,140 -6.14 0.1471
2014-08-13 2014-06-30 13F DUKE ENERGY CORP COM NEW 26441C204 3,994,136 -921,798 -18.75 296,325 -15.36 0.1549
2014-05-13 2014-03-31 13F DUKE ENERGY CORP COM NEW 26441C204 4,915,934 18,887 0.39 350,113 3.60 0.1914
2014-02-12 2013-12-31 13F DUKE ENERGY CORP COM NEW 26441C204 4,897,047 724,271 17.36 337,945 21.28 0.1895
2013-11-08 2013-09-30 13F DUKE ENERGY CORP COM NEW 26441C204 4,172,776 1,922,679 85.45 278,658 83.47 0.1726
2013-08-14 2013-06-30 13F DUKE ENERGY CORP COM NEW 26441C204 2,250,097 2,250,097 151,882 0.1026
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.