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For the year ended 31 December 2023
2022 1
Gross premiums written  1,931.7 1,652.3
Insurance revenue  1,519.9 1,226.5
Insurance service result  382.1 141.6
Net investment return 160.5 (76.7)
Profit (loss) after tax 321.5 (15.5)
Dividends 2 155.3 36.2
Net insurance ratio  65.1% 83.4%
Combined ratio (discounted)  74.9% 90.2%
Combined ratio (undiscounted)  82.6% 98.7%
Total investment return  5.7% (3.5%)
Diluted book value per share  $6.17 $5.48
Change in diluted book value per share  24.7% (1.2%)


(1) Comparative figures have been restated to reflect the adoption of IFRS 9 and IFRS 17.

(2) Dividends are included in the financial statement year in which they were recorded.

An excellent result due to profit after tax of $321.5 million, reflecting a strong underwriting performance complemented by positive investment returns.

During 2023, we continued to implement our long-term strategy to manage the market cycle and deliver strong profitable growth through a portfolio of diversified products. The combined ratio (undiscounted) of 82.6% is a strong result in a year with over $100bn of insured natural catastrophe events.

The Group’s investment portfolio, including unrealised gains and losses, returned 5.7% in 2023. The positive returns were driven by $108.5 million of interest and dividend income as our portfolio benefited from higher yields. The Group also benefited from net movement in unrealised gains on our fixed income portfolios due to the expectation of rate cuts in 2024.



Our shares performed broadly in line with the FTSE 250 in 2023. However, the total shareholder return of 9.5% was supported by a special dividend of $0.50 per share in the year. This is in line with Lancashire’s proven track record of returning excess capital to shareholders over time.

Insurance revenue grew 23.9% to $1,519.9 million driven by growth in casualty reinsurance, specialty reinsurance, property insurance and energy and marine insurance. 2023 was reasonably active for natural catastrophe and weather loss activity and we also saw some risk losses in our energy classes. However, none of these were individually material to the Group.

The Group continues to expand and diversify its underwriting portfolio by taking advantage of the current hard phase of the insurance market cycle and the associated rate increases across multiple lines of business. In 2023, the Group also announced the launch of Lancashire Insurance U.S., which will operate under a delegated underwriting arrangement with Lancashire’s UK company platform. Underwriting will commence in 2024.