WEC Energy Group — May 5, 2026 release

For the quarter, natural gas deliveries in Wisconsin – excluding natural gas used for power generation – decreased by 3.5 percent compared to the first quarter of 2025. On a weather normal basis, these natural gas deliveries were 2.1 percent lower. 1 Exhibit 99.1 The company is reaffirming its 2026 earnings guidance of $5.51 to $5.61 per share. This assumes normal weather for the remainder of the year. Earnings per share listed in this news release are on a fully diluted basis. Conference call A conference call is scheduled for 1 p.m. Central time, Tuesday, May 5. The call will review 2026 first-quarter earnings and the company’s outlook for the future. All interested parties, including stockholders, news media and the general public, are invited to listen. Access the call at 888-330-2443 up to 15 minutes before it begins. The number for international callers is 240-789-2728. The conference ID is 3088105. Conference call access also is available at wecenergygroup.com . Under 'Webcasts,' select 'Q1 Earnings.' In conjunction with this earnings announcement, WEC Energy Group will post on its website a package of detailed financial information on its first-quarter performance. The materials will be available at 6:30 a.m. Central time, Tuesday, May 5. Replay A replay will be available on the website and by phone. Access to the webcast replay will be available on the website about two hours after the call. Access to a phone replay also will be available approximately two hours after the call and remain accessible th