| Date Filed | Type | Description |
| 08/18/2023 |
8-K
| Quarterly results |
| 08/04/2023 |
8-K
| Investor presentation |
| 08/03/2023 |
8-K
| Quarterly results |
| 08/03/2023 |
10-Q
| Quarterly Report for the period ended June 30, 2023 |
| 05/18/2023 |
8-K
| Submission of Matters to a Vote of Security Holders Interactive Data |
| 05/08/2023 |
S-3ASR
| Form S-3ASR - Automatic shelf registration statement of securities of well-known seasoned issuers: |
| 05/05/2023 |
8-K
| Quarterly results |
| 05/04/2023 |
8-K
| Quarterly results |
| 05/04/2023 |
10-Q
| Quarterly Report for the period ended March 31, 2023 |
| 04/21/2023 |
DEFA14A
| Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material: |
| 03/29/2023 |
ARS
| Form ARS - Annual Report to Security Holders: |
| 03/29/2023 |
DEFA14A
| Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material: |
| 03/29/2023 |
DEFA14A
| Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material: |
| 03/29/2023 |
DEFA14A
| Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material: |
| 03/29/2023 |
DEF 14A
| Form DEF 14A - Other definitive proxy statements: |
| 03/08/2023 |
8-K
| Entry into a Material Definitive Agreement, Other Events, Financial Statements and Exhibits Interactive Data |
| 02/23/2023 |
8-K
| Regulation FD Disclosure, Other Events, Financial Statements and Exhibits Interactive Data |
| 02/22/2023 |
8-K
| Quarterly results |
| 02/22/2023 |
10-K
| Annual Report for the period ended December 31, 2022 |
| 02/14/2023 |
SC 13G
| T. Rowe Price Investment Management, Inc. reports a 7.4% stake in MGE ENERGY INC |
| 02/14/2023 |
SC 13G/A
| PRICE T ROWE ASSOCIATES INC reports a |
| 02/09/2023 |
SC 13G/A
| VANGUARD GROUP INC reports a 11.5% stake in MGE Energy Inc. |
| 02/01/2023 |
8-K
| Entry into a Material Definitive Agreement, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance S... |
| 01/31/2023 |
SC 13G/A
| BlackRock Inc. reports a 7.7% stake in MGE ENERGY INC |
| 12/16/2022 |
8-K
| Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements... |
| 11/10/2022 |
8-K
| Regulation FD Disclosure, Financial Statements and Exhibits Interactive Data |
| 11/09/2022 |
8-K
| Entry into a Material Definitive Agreement, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance S... |
| 11/03/2022 |
8-K
| Quarterly results |
| 11/03/2022 |
10-Q
| Quarterly Report for the period ended September 30, 2022 |
| 08/19/2022 |
8-K
| Quarterly results |
| 08/04/2022 |
8-K
| Quarterly results |
| 08/04/2022 |
10-Q
| Quarterly Report for the period ended June 30, 2022 |
| 05/19/2022 |
8-K
| Quarterly results |
| 05/09/2022 |
DEFA14A
| Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material: |
|