MGE Energy, Inc.
US ˙ NasdaqGS ˙ US55277P1049

SecurityMGEE / MGE Energy, Inc.
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership684,267 shares
Latest Disclosed Value $ 52,888,869
Dimensional Fund Advisors Lp reports 0.44% decrease in ownership of MGEE / MGE Energy, Inc.

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 684,267 shares of MGE Energy, Inc. (US:MGEE) valued at $52,886,996 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 687,309 shares of MGE Energy, Inc.. This represents a change in shares of -0.44% during the quarter. The current value of the position is $50,232,040 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)
2026-05-07 2026-03-31 13F MGE ENERGY COM 55277P104 684,267 -3,042 -0.44 52,889 -1.88 0.0024
2026-02-12 2025-12-31 13F MGE ENERGY COM 55277P104 687,309 -18,469 -2.62 53,899 -9.28 0.0113
2025-11-12 2025-09-30 13F MGE ENERGY COM 55277P104 705,778 -17,561 -2.43 59,411 -7.13 0.0127
2025-08-12 2025-06-30 13F MGE ENERGY COM 55277P104 723,339 -16,465 -2.23 63,972 -6.98 0.0148
2025-05-13 2025-03-31 13F MGE ENERGY COM 55277P104 739,804 -29,808 -3.87 68,771 -4.90 0.0171
2025-02-13 2024-12-31 13F MGE ENERGY COM 55277P104 769,612 2,225 0.29 72,314 3.04 0.0174
2024-11-07 2024-09-30 13F MGE ENERGY COM 55277P104 767,387 -16,009 -2.04 70,177 19.89 0.0170
2024-08-09 2024-06-30 13F MGE ENERGY COM 55277P104 783,396 20,533 2.69 58,536 -2.52 0.0153
2024-05-10 2024-03-31 13F MGE ENERGY COM 55277P104 762,863 3,819 0.50 60,053 9.41 0.0163
2024-02-07 2023-12-31 13F MGE ENERGY COM 55277P104 759,044 7,085 0.94 54,887 6.54 0.0160
2023-11-09 2023-09-30 13F MGE ENERGY COM 55277P104 751,959 -2,163 -0.29 51,517 -13.65 0.0169
2023-08-09 2023-06-30 13F MGE ENERGY COM 55277P104 754,122 2,812 0.37 59,658 2.23 0.0190
2023-05-12 2023-03-31 13F MGE ENERGY COM 55277P104 751,310 4,002 0.54 58,354 112,119.23 0.0197
2023-02-09 2022-12-31 13F MGE ENERGY COM 55277P104 747,308 -1,203 -0.16 53 -99.89 0.0155
2022-11-10 2022-09-30 13F MGE ENERGY COM 55277P104 748,511 3,412 0.46 49,127 -15.28 0.0189
2022-08-12 2022-06-30 13F MGE ENERGY COM 55277P104 745,099 253 0.03 57,990 -2.42 0.0208
2022-05-13 2022-03-31 13F MGE ENERGY COM 55277P104 744,846 12,427 1.70 59,431 -1.34 0.0183
2022-02-09 2021-12-31 13F MGE ENERGY COM 55277P104 732,419 -6,435 -0.87 60,240 10.92 0.0182
2021-11-12 2021-09-30 13F MGE ENERGY COM 55277P104 738,854 -4,203 -0.57 54,308 -1.82 0.0175
2021-08-12 2021-06-30 13F MGE ENERGY COM 55277P104 743,057 -37,244 -4.77 55,313 -0.80 0.0175
2021-05-14 2021-03-31 13F MGE ENERGY COM 55277P104 780,301 -31,082 -3.83 55,760 -1.87 0.0184
2021-03-08 2020-12-31 13F/A-2 MGE ENERGY COM 55277P104 811,383 -18,278 -2.20 56,821 9.30 0.0205
2021-02-11 2020-12-31 13F MGE ENERGY COM 55277P104 811,383 -18,278 56,821 20,520.7250
2020-11-12 2020-09-30 13F MGE ENERGY COM 55277P104 829,661 -28,766 -3.35 51,986 -6.12 0.0220
2020-08-13 2020-06-30 13F MGE ENERGY COM 55277P104 858,427 -23,994 -2.72 55,376 -4.15 0.0243
2020-05-14 2020-03-31 13F MGE ENERGY COM 55277P104 882,421 -728 -0.08 57,776 -17.00 0.0301
2020-02-14 2019-12-31 13F MGE ENERGY COM 55277P104 883,149 -17,302 -1.92 69,610 -3.21 0.0254
2019-11-12 2019-09-30 13F MGE ENERGY COM 55277P104 900,451 -4,265 -0.47 71,918 8.78 0.0279
2019-08-13 2019-06-30 13F MGE ENERGY COM 55277P104 904,716 -9,416 -1.03 66,116 6.41 0.0257
2019-08-12 2019-03-31 13F/A-2 MGE ENERGY COM 55277P104 914,132 3,520 0.39 62,133 13.80 0.0247
2019-05-10 2019-03-31 13F MGE ENERGY COM 55277P104 914,132 3,520 62,133
2019-02-26 2018-12-31 13F/A-1 MGE ENERGY COM 55277P104 910,612 5,457 0.60 54,600 -5.52 0.0247
2019-02-13 2018-12-31 13F MGE ENERGY COM 55277P104 910,612 5,457 54,600
2018-11-13 2018-09-30 13F MGE ENERGY COM 55277P104 905,155 2,451 0.27 57,793 1.54 0.0220
2018-08-10 2018-06-30 13F MGE ENERGY COM 55277P104 902,704 166 0.02 56,915 12.41 0.0227
2018-05-11 2018-03-31 13F MGE ENERGY COM 55277P104 902,538 6,746 0.75 50,632 -10.43 0.0211
2018-02-12 2017-12-31 13F MGE ENERGY COM 55277P104 895,792 -1,660 -0.18 56,526 -2.50 0.0234
2017-11-13 2017-09-30 13F MGE ENERGY COM 55277P104 897,452 -1,747 -0.19 57,977 0.20 0.0253
2017-08-11 2017-06-30 13F MGE ENERGY COM 55277P104 899,199 -20,168 -2.19 57,863 -3.17 0.0267
2017-05-12 2017-03-31 13F MGE ENERGY COM 55277P104 919,367 -32,401 -3.40 59,759 -3.85 0.0286
2017-02-09 2016-12-31 13F MGE ENERGY COM 55277P104 951,768 -68,920 -6.75 62,151 7.75 0.0310
2016-11-10 2016-09-30 13F MGE ENERGY COM 55277P104 1,020,688 -648 -0.06 57,680 -0.07 0.0312
2016-08-09 2016-06-30 13F MGE ENERGY COM 55277P104 1,021,336 19,147 1.91 57,719 10.23 0.0332
2016-05-13 2016-03-31 13F MGE ENERGY COM 55277P104 1,002,189 62,962 6.70 52,364 20.15 0.0313
2016-02-10 2015-12-31 13F MGE ENERGY COM 55277P104 939,227 24,164 2.64 43,581 15.62 0.0272
2015-11-13 2015-09-30 13F MGE ENERGY COM 55277P104 915,063 20,778 2.32 37,692 8.82 0.0247
2015-08-14 2015-06-30 13F MGE ENERGY COM 55277P104 894,285 19,031 2.17 34,636 -10.71 0.0212
2015-05-14 2015-03-31 13F MGE ENERGY COM 55277P104 875,254 38,717 4.63 38,791 1.66 0.0245
2015-02-06 2014-12-31 13F MGE ENERGY COM 55277P104 836,537 28,106 3.48 38,156 26.67 0.0251
2014-11-13 2014-09-30 13F MGE ENERGY COM 55277P104 808,431 18,650 2.36 30,123 -3.46 0.0213
2014-08-08 2014-06-30 13F MGE ENERGY COM 55277P104 789,781 33,784 4.47 31,204 5.22 0.0217
2014-05-14 2014-03-31 13F MGE ENERGY COM 55277P104 755,997 261,183 52.78 29,657 3.51 0.0222
2014-02-12 2013-12-31 13F MGE ENERGY COM 55277P104 494,814 2,560 0.52 28,650 6.70 0.0223
2013-11-13 2013-09-30 13F MGE ENERGY COM 55277P104 492,254 2,842 0.58 26,852 0.19 0.0232
2013-08-15 2013-06-30 13F MGE ENERGY COM 55277P104 489,412 489,412 26,800 0.0252
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.