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KINSALE CAPITAL GROUP Exhibit 99.1 Kinsale Capital Group , Inc. Reports 2021 First Quarter Results Richmond , VA , April 29 , 2021 - Kinsale Capital Group , Inc. ( Nasdaq : KNSL ) reported net income of $ 32.1 million , $ 1.39 per diluted share , for the first quarter of 2021 compared to $ 5.1 million , $ 0.22 per diluted share , for the first quarter of 2020. Net operating earnings ( 1 ) were $ 25.5 million , $ 1.11 per diluted share , for the first quarter of 2021 compared to $ 17.2 million , $ 0.76 per diluted share , for the first quarter of 2020 . Highlights for the first quarter of 2021 included : • • • • Net income increased by 530.7 % compared to the first quarter of 2020 , which was due to growth in the business from favorable market conditions and continued rate increases , higher returns on equity investments as a result of a rebound in the financial markets and higher net favorable development of loss reserves from prior accident years Net operating earnings ( 1 ) of $ 25.5 million increased by 48.1 % compared to the first quarter of 2020 36.2 % growth in gross written premiums to $ 168.9 million compared to the first quarter of 2020 16.5 % increase in net investment income to $ 6.9 million compared to the first quarter of 2020 Underwriting income ( 2 ) of $ 24.6 million in the first quarter of 2021 , resulting in a combined ratio of 80.0 % 17.6 % annualized operating return on equity ( 3 ) for the three months ended March 31 , 2021 " Results for 2021 are off to a good start , reflecting the strength of our dynamic business model and favorable tail winds in the excess and surplus lines market . Our business continues to run on all cylinders with an increase in premiums of over 36 % during the quarter and a combined ratio of 80 % . Further , we efficiently deployed capital from our recent equity offering to take advantage of these attractive growth opportunities in the E & S market and achieved an annualized operating return on equity of 17.6 % for the first quarter of 2021. We remain as committed as ever to exercise underwriting discipline and cost containment by leveraging the effective use of technology and our industry expertise , " said President and Chief Executive Officer , Michael P. Kehoe . Results of Operations Underwriting Results Gross written premiums were $ 168.9 million for the first quarter of 2021 compared to $ 124.0 million for the first quarter of 2020 , an increase of 36.2 % . Growth in gross written premiums during the first quarter of 2021 over the same period last year was driven by higher submission activity from brokers and increased rates . Underwriting income ( 2 ) was $ 24.6 million , resulting in a combined ratio of 80.0 % , for the first quarter of 2021 , compared to $ 14.4 million and a combined ratio of 83.9 % for the same period last year . The increase in underwriting income ( 2 ) quarter over quarter , was largely due to premium growth from a positive underwriting environment , continued rate increases and higher net favorable development of loss reserves from prior accident years . Loss and expense ratios were 57.1 % and 22.9 % , respectively , for the first quarter of 2021 compared to 59.9 % and 24.0 % for the first quarter of 2020. Results for the first quarters of 2021 and 2020 included net favorable development of loss reserves from prior accident years of $ 7.1 million , or 5.7 points , and $ 3.0 million , or 3.3 points , respectively . 1