Exhibit 99.1 Kinsale Capital Group Reports First Quarter 2024 Results Richmond, VA, April 25, 2024 - Kinsale Capital Group, Inc. (NYSE: KNSL) reported net income of $98.9 million,$4.24 per diluted share, for the first quarter of 2024 compared to $55.8 million,$2.40 per diluted share, for the first quarter of 2023. Net operating earnings(1) were $81.6 million,$3.50 per diluted share, for the first quarter of 2024 compared to $56.8 million,$2.44 per diluted share, for the first quarter of 2023. Highlights ...