Biggest changeYear ended December 31, 2023 2023 Large Loss Events (1) (in thousands) Net claims and claim expenses incurred $ (354,228) Assumed reinstatement premiums earned 46,534 Ceded reinstatement premiums earned (62) Earned (lost) profit commissions 9,130 Net negative impact on underwriting result (298,626) Redeemable noncontrolling interest 85,276 Net negative impact on net income (loss) available (attributable) to RenaissanceRe common shareholders $ (213,350) (1) “2023 Large Loss Events” includes: Hurricane Otis and Storm Ciaran in October and November 2023, the wildfires in Hawaii in August 2023 and Hurricane Idalia, a series of large, severe weather events in Texas and other southern and central U.S. states in June 2023, the earthquakes in southern and central Turkey in February 2023, Cyclone Gabrielle, the flooding in northern New Zealand in January and February 2023, and various wind and thunderstorm events in both the Southern and Midwest U.S. during March 2023, and certain aggregate loss contracts triggered during 2023. 72 Underwriting Results by Segment Property Segment Below is a summary of the underwriting results and ratios for our Property segment: Year ended December 31, 2024 2023 Change (in thousands, except percentages) Gross premiums written $ 4,823,731 $ 3,562,414 $ 1,261,317 Net premiums written $ 3,833,636 $ 2,967,309 $ 866,327 Net premiums earned $ 3,850,352 $ 3,090,792 $ 759,560 Net claims and claim expenses incurred 1,141,726 799,905 341,821 Acquisition expenses 758,554 600,127 158,427 Operational expenses 302,360 251,433 50,927 Underwriting income (loss) $ 1,647,712 $ 1,439,327 $ 208,385 Net claims and claim expenses incurred – current accident year $ 1,960,578 $ 1,208,810 $ 751,768 Net claims and claim expenses incurred – prior accident years (818,852) (408,905) (409,947) Net claims and claim expenses incurred – total $ 1,141,726 $ 799,905 $ 341,821 Net claims and claim expense ratio – current accident year 50.9 % 39.1 % 11.8 pts Net claims and claim expense ratio – prior accident years (21.2) % (13.2) % (8.0) pts Net claims and claim expense ratio – calendar year 29.7 % 25.9 % 3.8 pts Underwriting expense ratio 27.5 % 27.5 % — pts Combined ratio 57.2 % 53.4 % 3.8 pts Property Gross Premiums Written In 2024, our Property segment gross premiums written increased by $1.3 billion, or 35.4%, to $4.8 billion, compared to $3.6 billion in 2023.
Biggest change(2) “2024 Large Loss Events” includes: Hurricanes Milton and Helene, and the “Other 2024 Large Loss Events.” 74 Underwriting Results by Segment Property Segment Below is a summary of the underwriting results and ratios for our Property segment: Year ended December 31, 2025 2024 Change (in thousands, except percentages) Gross premiums written $ 4,942,141 $ 4,823,731 $ 118,410 Net premiums written $ 4,043,996 $ 3,833,636 $ 210,360 Net premiums earned $ 3,971,669 $ 3,850,352 $ 121,317 Net claims and claim expenses incurred 1,426,015 1,141,726 284,289 Acquisition expenses 714,852 758,554 (43,702) Operational expenses 297,481 302,360 (4,879) Underwriting income (loss) $ 1,533,321 $ 1,647,712 $ (114,391) Net claims and claim expenses incurred – current accident year $ 2,515,211 $ 1,960,578 $ 554,633 Net claims and claim expenses incurred – prior accident years (1,089,196) (818,852) (270,344) Net claims and claim expenses incurred – total $ 1,426,015 $ 1,141,726 $ 284,289 Net claims and claim expense ratio – current accident year 63.3 % 50.9 % 12.4 pts Net claims and claim expense ratio – prior accident years (27.4) % (21.2) % (6.2) pts Net claims and claim expense ratio – calendar year 35.9 % 29.7 % 6.2 pts Underwriting expense ratio 25.5 % 27.5 % (2.0) pts Combined ratio 61.4 % 57.2 % 4.2 pts Property Gross Premiums Written • Gross premiums written increased by $118.4 million, or 2.5%, driven by: – an increase in the catastrophe class of $321.3 million, or 10.7%, and included: – an increase of $145.8 million, or 5.0%, without the impact of reinstatement premiums, driven by strong mid-year renewals with growth on existing clients as well as new underwriting opportunities, including U.S. catastrophe exposed business; and – an increase in reinstatement premiums of $175.5 million, due to the increased impact of the large losses in 2025 as compared to 2024; partially offset by – a decrease of $202.9 million, or 11.1%, in the other property class, primarily reflecting premium adjustments, in part due to rate decreases in the excess and surplus business.
Year ended December 31, 2024 Hurricane Milton Hurricane Helene Other 2024 Large Loss Events (1) 2024 Large Loss Events (2) (in thousands, except percentages) Net negative impact on Property segment underwriting result $ (332,710) $ (179,618) $ (267,513) $ (779,841) Net negative impact on Casualty and Specialty segment underwriting result — (605) (66,907) (67,512) Net negative impact on underwriting result $ (332,710) $ (180,223) $ (334,420) $ (847,353) Percentage point impact on consolidated combined ratio 3.4 1.8 3.6 8.8 The financial data below provides additional information detailing the net negative impact of the 2024 Large Loss Events on our consolidated financial statements for the year ended December 31, 2024.
Year ended December 31, 2024 Hurricane Milton Hurricane Helene Other 2024 Large Loss Events (1) 2024 Large Loss Events (2) (in thousands, except percentages) Net negative impact on Property segment underwriting result $ (332,710) $ (179,618) $ (267,513) $ (779,841) Net negative impact on Casualty and Specialty segment underwriting result — (605) (66,907) (67,512) Net negative impact on underwriting result $ (332,710) $ (180,223) $ (334,420) $ (847,353) Percentage point impact on consolidated combined ratio 3.4 1.8 3.6 8.8 The financial data below provides additional information detailing the net negative impact of the 2024 Large Loss Events on our consolidated financial statements for 2024.
Year ended December 31, 2024 Hurricane Milton Hurricane Helene Other 2024 Large Loss Events (1) 2024 Large Loss Events (2) (in thousands) Net claims and claim expenses incurred $ (406,878) $ (217,767) $ (381,330) $ (1,005,975) Assumed reinstatement premiums earned 86,128 40,655 53,159 179,942 Ceded reinstatement premiums earned (2,158) (931) (9,971) (13,060) Earned (lost) profit commissions (9,802) (2,180) 3,722 (8,260) Net negative impact on underwriting result (332,710) (180,223) (334,420) (847,353) Redeemable noncontrolling interest 62,229 36,969 87,625 186,823 Net negative impact on net income (loss) available (attributable) to RenaissanceRe common shareholders $ (270,481) $ (143,254) $ (246,795) $ (660,530) (1) “Other 2024 Large Loss Events” includes: the Baltimore Bridge Collapse; a series of severe convective storms that impacted the Southern and Midwest United States; the Hualien earthquake which impacted Taiwan in April 2024; a severe hailstorm which impacted Calgary in August 2024, Hurricane Debby, Hurricane Beryl, and certain aggregate loss contracts triggered during 2024.
Year ended December 31, 2024 Hurricane Milton Hurricane Helene Other 2024 Large Loss Events (1) 2024 Large Loss Events (2) (in thousands) Net claims and claim expenses incurred $ (406,878) $ (217,767) $ (381,330) $ (1,005,975) Assumed reinstatement premiums earned 86,128 40,655 53,159 179,942 Ceded reinstatement premiums earned (2,158) (931) (9,971) (13,060) Earned (lost) profit commissions (9,802) (2,180) 3,722 (8,260) Net negative impact on underwriting result (332,710) (180,223) (334,420) (847,353) Redeemable noncontrolling interest 62,229 36,969 87,625 186,823 Net negative impact on net income (loss) available (attributable) to RenaissanceRe common shareholders $ (270,481) $ (143,254) $ (246,795) $ (660,530) (1) “Other 2024 Large Loss Events” includes: the Baltimore Bridge Collapse; a series of severe convective storms that impacted the Southern and Midwest United States; the Hualien earthquake which impacted Taiwan in April 2024; a severe hailstorm which impacted Calgary in August 2024, Hurricanes Debby and Beryl, and certain aggregate loss contracts triggered during 2024.
Our expenses primarily consist of: (1) net claims and claim expenses incurred on the policies of reinsurance and insurance we sell; (2) acquisition costs, which typically represent a percentage of the premiums we write; (3) operational expenses, which primarily consist of personnel expenses, rent and other expenses; (4) corporate expenses, which include certain executive, legal and consulting expenses, costs for research and development, transaction and integration-related expenses, and other miscellaneous costs, including those associated with operating as a publicly traded company; and (5) interest and dividends related to our debt, preference shares and common shares.
Our expenses primarily consist of: (1) net claims and claim expenses incurred on the policies of reinsurance and insurance we sell; (2) acquisition costs, which typically represent a percentage of the premiums we write; (3) operational expenses, which primarily consist of personnel expenses, rent and other expenses; (4) corporate expenses, which include certain executive, legal and consulting expenses, costs for research and 55 development, transaction and integration-related expenses, and other miscellaneous costs, including those associated with operating as a publicly traded company; (5) interest and dividends related to our debt, preference shares and common shares; and (6) income taxes.
Cash flows provided by operating activities during 2024 were primarily the result of certain adjustments to reconcile our net income of $3.0 billion to net cash provided by operating activities, including: • a decrease in reinsurance recoverable of $862.9 million due to prior year favorable development across the 2017 through 2022 accident years, in addition to paid recoveries; • an increase in reserve for claims and claim expenses of $816.6 million, primarily resulting from an increase in reserves in our Casualty and Specialty segment, largely driven by an increase in earned 86 premiums due to the renewal of business acquired in the Validus Acquisition and organic growth, resulting in additional attritional reserves, partially offset by a decrease in reserves in our Property segment primarily due to paid losses and prior year favorable development; partially offset by • a decrease in reinsurance balances payable of $381.8 million, principally driven by the redemption of capital from Upsilon RFO and the timing of payments related to underwriting activity Cash flows used in investing activities.
Cash flows provided by operating activities during 2024 were primarily the result of certain adjustments to reconcile our net income of $3.0 billion to net cash provided by operating activities, including: • a decrease in reinsurance recoverable of $862.9 million due to prior year favorable development across the 2017 through 2022 accident years, in addition to paid recoveries; • an increase in reserve for claims and claim expenses of $816.6 million, primarily resulting from an increase in reserves in our Casualty and Specialty segment, largely driven by an increase in earned 89 premiums due to the renewal of business acquired in the Validus Acquisition and organic growth, resulting in additional attritional reserves, partially offset by a decrease in reserves in our Property segment primarily due to paid losses and prior year favorable development; partially offset by • a decrease in reinsurance balances payable of $381.8 million, principally driven by the redemption of capital from Upsilon RFO and the timing of payments related to underwriting activity Cash flows used in investing activities During 2024, our cash flows used in investing activities were $3.1 billion, principally reflecting net purchases of fixed maturity investments trading of $2.8 billion and other investments of $358.2 million, partially offset by cash flows from net sales of short term investments of $174.5 million.
Corporate Expenses Year ended December 31, 2024 2023 Change (in thousands) Corporate expenses $ 134,784 $ 127,642 $ 7,142 Corporate expenses include certain executive, director, legal and consulting expenses, costs for research and development, and other miscellaneous costs, including those associated with operating as a publicly traded company, as well as costs incurred in connection with the acquisition of Validus.
Corporate Expenses Year ended December 31, 2025 2024 Change (in thousands) Corporate expenses $ 82,008 $ 134,784 $ (52,776) Corporate expenses include certain executive, director, legal and consulting expenses, costs for research and development, and other miscellaneous costs, including those associated with operating as a publicly traded company, as well as costs incurred in connection with the acquisition of Validus.
Investments in Other Ventures, under Equity Method The table below shows our investments in other ventures, under equity method: At December 31, 2024 2023 (in thousands, except percentages) Capital Invested Ownership % Carrying Value Capital Invested Ownership % Carrying Value Investments in other ventures, under equity method $ 205,373 0.1% - 50.0% $ 102,770 $ 214,484 0.1% - 50.0% $ 112,624 The realized value we ultimately attain for our investments in other ventures, under equity method will likely differ from the carrying value, perhaps materially.
Investments in Other Ventures, under Equity Method The table below shows our investments in other ventures, under equity method: At December 31, 2025 2024 (in thousands, except percentages) Capital Invested Ownership % Carrying Value Capital Invested Ownership % Carrying Value Investments in other ventures, under equity method $ 206,142 0.1% - 50.0% $ 121,871 $ 205,373 0.1% - 50.0% $ 102,770 The realized value we ultimately attain for our investments in other ventures, under equity method will likely differ from the carrying value, perhaps materially.
Year ended December 31, 2024 2023 2022 2021 2020 (in thousands, except share and per share data and percentages) Statements of Operations Data: Gross premiums written $ 11,733,066 $ 8,862,366 $ 9,213,540 $ 7,833,798 $ 5,806,165 Net premiums written 9,952,216 7,467,813 7,196,160 5,939,375 4,096,333 Net premiums earned 10,095,760 7,471,133 6,333,989 5,194,181 3,952,462 Net investment income 1,654,289 1,253,110 559,932 319,479 354,038 Net realized and unrealized gains (losses) on investments (27,840) 414,522 (1,800,485) (218,134) 820,636 Net claims and claim expenses incurred 5,332,981 3,573,509 4,338,840 3,876,087 2,924,609 Acquisition expenses 2,643,867 1,875,034 1,568,606 1,214,858 897,677 Operational expenses 496,588 375,182 276,691 212,184 206,687 Underwriting income (loss) 1,622,324 1,647,408 149,852 (108,948) (76,511) Net income (loss) 2,960,532 3,620,127 (1,159,816) (103,440) 993,058 Net income (loss) available (attributable) to RenaissanceRe common shareholders 1,834,985 2,525,757 (1,096,578) (73,421) 731,482 Net income (loss) available (attributable) to RenaissanceRe common shareholders per common share – diluted 35.21 52.27 (25.50) (1.57) 15.31 Dividends per common share 1.56 1.52 1.48 1.44 1.40 Weighted average common shares outstanding – diluted 51,339 47,607 43,040 47,171 47,178 Return on average common equity 19.3 % 40.5 % (22.0) % (1.1) % 11.7 % Combined ratio 83.9 % 77.9 % 97.7 % 102.1 % 101.9 % At December 31, 2024 2023 2022 2021 2020 Balance Sheet Data: Total investments $ 32,639,456 $ 29,216,143 $ 22,220,436 $ 21,442,659 $ 20,558,176 Total assets 50,707,550 49,007,105 36,552,878 33,959,502 30,820,580 Reserve for claims and claim expenses 21,303,491 20,486,869 15,892,573 13,294,630 10,381,138 Unearned premiums 5,950,415 6,136,135 4,559,107 3,531,213 2,763,599 Debt 1,886,689 1,958,655 1,170,442 1,168,353 1,136,265 Capital leases 21,010 21,540 22,020 22,459 22,853 Preference shares 750,000 750,000 750,000 750,000 525,000 Total shareholders’ equity attributable to RenaissanceRe 10,574,012 9,454,958 5,325,274 6,624,281 7,560,248 Common shares outstanding 50,181 52,694 43,718 44,445 50,811 Book value per common share $ 195.77 $ 165.20 $ 104.65 $ 132.17 $ 138.46 Accumulated dividends 28.08 26.52 25.00 23.52 22.08 Book value per common share plus accumulated dividends $ 223.85 $ 191.72 $ 129.65 $ 155.69 $ 160.54 Change in book value per common share plus change in accumulated dividends 19.4 % 59.3 % (19.7) % (3.5) % 16.0 % 56 SUMMARY OF CRITICAL ACCOUNTING ESTIMATES Claims and Claim Expense Reserves We believe the most significant accounting judgment made by management is our estimate of claims and claim expense reserves.
Year ended December 31, 2025 2024 2023 2022 2021 (in thousands, except share and per share data and percentages) Statements of Operations Data: Gross premiums written $ 11,738,420 $ 11,733,066 $ 8,862,366 $ 9,213,540 $ 7,833,798 Net premiums written 9,870,200 9,952,216 7,467,813 7,196,160 5,939,375 Net premiums earned 9,901,182 10,095,760 7,471,133 6,333,989 5,194,181 Net investment income 1,703,475 1,654,289 1,253,110 559,932 319,479 Net realized and unrealized gains (losses) on investments 1,181,268 (27,840) 414,522 (1,800,485) (218,134) Net claims and claim expenses incurred 5,615,839 5,332,981 3,573,509 4,338,840 3,876,087 Acquisition expenses 2,550,823 2,643,867 1,875,034 1,568,606 1,214,858 Operational expenses 464,477 496,588 375,182 276,691 212,184 Underwriting income (loss) 1,270,043 1,622,324 1,647,408 149,852 (108,948) Net income (loss) 3,617,743 2,960,532 3,620,127 (1,159,816) (103,440) Net income (loss) available (attributable) to RenaissanceRe common shareholders 2,646,959 1,834,985 2,525,757 (1,096,578) (73,421) Net income (loss) available (attributable) to RenaissanceRe common shareholders per common share – diluted 56.03 35.21 52.27 (25.50) (1.57) Dividends per common share 1.60 1.56 1.52 1.48 1.44 Weighted average common shares outstanding – diluted 46,483 51,339 47,607 43,040 47,171 Return on average common equity 25.9 % 19.3 % 40.5 % (22.0) % (1.1) % Combined ratio 87.2 % 83.9 % 77.9 % 97.7 % 102.1 % At December 31, 2025 2024 2023 2022 2021 Balance Sheet Data: Total investments $ 36,073,209 $ 32,639,456 $ 29,216,143 $ 22,220,436 $ 21,442,659 Total assets 53,800,390 50,707,550 49,007,105 36,552,878 33,959,502 Reserve for claims and claim expenses 22,302,345 21,303,491 20,486,869 15,892,573 13,294,630 Unearned premiums 6,028,174 5,950,415 6,136,135 4,559,107 3,531,213 Debt 2,329,201 1,886,689 1,958,655 1,170,442 1,168,353 Capital leases 20,426 21,010 21,540 22,020 22,459 Preference shares 750,000 750,000 750,000 750,000 750,000 Total shareholders’ equity attributable to RenaissanceRe 11,608,657 10,574,012 9,454,958 5,325,274 6,624,281 Common shares outstanding 43,962 50,181 52,694 43,718 44,445 Book value per common share $ 247.00 $ 195.77 $ 165.20 $ 104.65 $ 132.17 Accumulated dividends 29.68 28.08 26.52 25.00 23.52 Book value per common share plus accumulated dividends $ 276.68 $ 223.85 $ 191.72 $ 129.65 $ 155.69 Change in book value per common share plus change in accumulated dividends 27.0 % 19.4 % 59.3 % (19.7) % (3.5) % 58 SUMMARY OF CRITICAL ACCOUNTING ESTIMATES Claims and Claim Expense Reserves We believe the most significant accounting judgment made by management is our estimate of claims and claim expense reserves.