Exhibit 99.1 CMS Energy Announces Third Quarter Results, Introduces 2025 Guidance JACKSON, Mich., Oct. 31, 2024 – CMS Energy announced today reported earnings per share of $0.84 for the third quarter of 2024, compared to $0.60 per share for the same quarter in 2023. The company's adjusted earnings per share for the third quarter were $0.84, compared to $0.61 per share for the same quarter in 2023. For the first nine months of the year, the company reported $2.45 per share compared to $1.96 per share for the ...