Exhibit 99.1 Kinsale Capital Group Reports Third Quarter 2026 Results Richmond, VA, October 22, 2026 - Kinsale Capital Group, Inc. (NYSE: KNSL) reported net income of $98.1 million, $4.36 per diluted share, for the third quarter of 2026 compared to $141.6 million, $6.09 per diluted share, for the third quarter of 2025. Net income was $386.6 million, $16.97 per diluted share, for the first nine months of 2026 compared to $365.0 million, $15.67 per diluted share, for the first nine months of 2025. Net income ...