| SC 13G/A | 2024-04-05 | BlackRock Inc. | MGE ENERGY INC | 5,922,770 | 16.4% | EDGAR |
| SC 13G | 2024-03-21 | MILLENNIUM MANAGEMENT LLC | MGE ENERGY INC | 30,772 | 0.1% | EDGAR |
| SC 13G | 2024-02-14 | T. Rowe Price Investment Management, Inc. | MGE ENERGY INC | 2,044,254 | 5.7% | EDGAR |
| SC 13G/A | 2024-02-13 | VANGUARD GROUP INC | MGE ENERGY INC | 4,180,606 | 11.6% | EDGAR |
| SC 13G/A | 2024-01-25 | BlackRock Inc. | MGE ENERGY INC | 2,994,321 | 8.3% | EDGAR |
| SC 13G/A | 2023-02-14 | PRICE T ROWE ASSOCIATES INC /MD/ | MGE ENERGY INC | 44,248 | 0.1% | EDGAR |
| SC 13G | 2023-02-14 | T. Rowe Price Investment Management, Inc. | MGE ENERGY INC | 2,663,504 | 7.4% | EDGAR |
| SC 13G/A | 2023-02-09 | VANGUARD GROUP INC | MGE ENERGY INC | 4,142,825 | 11.5% | EDGAR |
| SC 13G/A | 2023-01-31 | BlackRock Inc. | MGE ENERGY INC | 2,796,077 | 7.7% | EDGAR |
| SC 13G | 2022-02-14 | PRICE T ROWE ASSOCIATES INC /MD/ | MGE ENERGY INC | 1,892,539 | 5.2% | EDGAR |
| SC 13G/A | 2022-02-09 | VANGUARD GROUP INC | MGE ENERGY INC | 3,891,418 | 10.8% | EDGAR |
| SC 13G/A | 2022-02-03 | BlackRock Inc. | MGE ENERGY INC | 2,762,739 | 7.6% | EDGAR |
| SC 13G/A | 2021-02-10 | VANGUARD GROUP INC | MGE ENERGY INC | 3,610,316 | 10.0% | EDGAR |
| SC 13G/A | 2021-02-10 | VANGUARD GROUP INC | MGE ENERGY INC | 3,637,165 | 10.1% | EDGAR |
| SC 13G/A | 2021-01-29 | BlackRock Inc. | MGE ENERGY INC | 2,676,115 | 7.4% | EDGAR |
| SC 13G/A | 2020-02-12 | VANGUARD GROUP INC | MGE ENERGY INC | 3,651,498 | 10.5% | EDGAR |
| SC 13G/A | 2020-02-05 | BlackRock Inc. | MGE ENERGY INC | 2,547,469 | 7.3% | EDGAR |
| SC 13G/A | 2019-02-11 | VANGUARD GROUP INC | MGE ENERGY INC | 3,543,231 | 10.2% | EDGAR |
| SC 13G/A | 2019-02-06 | BlackRock Inc. | MGE ENERGY INC | 2,508,977 | 7.2% | EDGAR |
| SC 13G/A | 2018-11-13 | VANGUARD GROUP INC | MGE ENERGY INC | 3,473,540 | 10.0% | EDGAR |