MGE Energy, Inc.
US ˙ NasdaqGS ˙ US55277P1049

SecurityMGEE / MGE Energy, Inc.
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership17,441 shares
Latest Disclosed Value $ 1,348,135
Advisor Group Holdings, Inc. reports 34.43% decrease in ownership of MGEE / MGE Energy, Inc.

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 17,441 shares of MGE Energy, Inc. (US:MGEE) valued at $1,348,015 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 26,598 shares of MGE Energy, Inc.. This represents a change in shares of -34.43% during the quarter. The current value of the position is $1,280,344 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)
2026-05-15 2026-03-31 13F MGE ENERGY COM 55277P104 17,441 -9,157 -34.43 1,348 -35.38 0.0011
2026-02-17 2025-12-31 13F MGE ENERGY COM 55277P104 26,598 -7,881 -22.86 2,086 -28.46 0.0030
2025-11-14 2025-09-30 13F MGE ENERGY COM 55277P104 34,479 2,980 9.46 2,917 4.67 0.0041
2025-09-04 2025-06-30 13F/A-1 MGE ENERGY COM 55277P104 31,499 14,415 84.38 2,786 75.44 0.0050
2025-08-13 2025-06-30 13F MGE ENERGY COM 55277P104 9,675 -7,409 897 0.0010
2025-05-12 2025-03-31 13F MGE ENERGY COM 55277P104 17,084 5,324 45.27 1,589 43.71 0.0035
2025-06-06 2024-12-31 13F/A-1 MGE ENERGY COM 55277P104 11,760 -680 -5.47 1,105 -2.81 0.0025
2025-02-07 2024-12-31 13F MGE ENERGY COM 55277P104 10,594 -1,846 980 0.0025
2024-11-13 2024-09-30 13F MGE ENERGY COM 55277P104 12,440 -88 -0.70 1,138 21.47 0.0026
2024-08-13 2024-06-30 13F MGE ENERGY COM 55277P104 12,528 -46 -0.37 936 -5.45 0.0022
2024-05-10 2024-03-31 13F MGE ENERGY COM 55277P104 12,574 -988 -7.29 990 1.02 0.0022
2024-02-12 2023-12-31 13F MGE ENERGY COM 55277P104 13,562 -1,894 -12.25 981 -7.46 0.0017
2023-11-13 2023-09-30 13F MGE ENERGY COM 55277P104 15,456 1,813 13.29 1,059 -1.58 0.0016
2023-08-21 2023-06-30 13F/A-1 MGE ENERGY COM 55277P104 13,643 -397 -2.83 1,076 -1.56 0.0019
2023-08-10 2023-06-30 13F MGE ENERGY COM 55277P104 13,643 -397 1,076 0.0003
2023-05-12 2023-03-31 13F MGE ENERGY COM 55277P104 14,040 -3,654 -20.65 1,094 -12.21 0.0021
2023-02-10 2022-12-31 13F MGE ENERGY COM 55277P104 17,694 -23,792 -57.35 1,245 -54.28 0.0025
2022-11-14 2022-09-30 13F MGE ENERGY COM 55277P104 41,486 -1,959 -4.51 2,723 -19.63 0.0062
2022-08-10 2022-06-30 13F MGE ENERGY COM 55277P104 43,445 1,070 2.53 3,388 9.79 0.0075
2022-05-04 2022-03-31 13F MGE ENERGY COM 55277P104 42,375 -586 -1.36 3,086 -12.55 0.0060
2022-02-03 2021-12-31 13F MGE ENERGY COM 55277P104 42,961 -3,109 -6.75 3,529 4.19 0.0067
2021-11-05 2021-09-30 13F MGE ENERGY COM 55277P104 46,070 1,406 3.15 3,387 1.80 0.0071
2021-08-02 2021-06-30 13F MGE ENERGY COM 55277P104 44,664 4,875 12.25 3,327 17.15 0.0072
2021-05-13 2021-03-31 13F MGE ENERGY COM 55277P104 39,789 28 0.07 2,840 1.97 0.0068
2021-02-10 2020-12-31 13F MGE ENERGY COM 55277P104 39,761 17,022 74.86 2,785 95.30 0.0074
2020-11-12 2020-09-30 13F MGE ENERGY COM 55277P104 22,739 -1,127 -4.72 1,426 -7.40 0.0043
2020-08-14 2020-06-30 13F MGE ENERGY COM 55277P104 23,866 1,042 4.57 1,540 3.08 0.0052
2020-05-18 2020-03-31 13F MGE ENERGY COM 55277P104 22,824 22,824 1,494 0.0061
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.