Exhibit 99.1 ALBUQUERQUE, N.M. April 30, 2024 PNM Resources Reports First Quarter 2024 Results 2024 Ongoing Earnings Guidance Affirmed • 2024 first quarter GAAP earnings of $0.52 per diluted share • 2024 first quarter ongoing earnings of$0.41 per diluted share • Affirmed ongoing earnings guidance range of $2.65 -$2.75 PNM Resources (In millions, except EPS) Q1 2024 Q1 2023 GAAP net earnings attributable to PNM Resources $47.2$55.0 GAAP diluted EPS $0.52$0.64 Ongoing net earnings $37.0$47.6 Ongoing dilu ...