Financial Performance - Net earnings attributable to Berkshire shareholders for 2024 were 88.995billion,adecreaseof7.896.223 billion in 2023[277]. - Investment gains for 2024 were 41.558billion,adecreasefrom58.873 billion in 2023, reflecting significant volatility in market prices[277]. - Total revenue for 2024 was 26,348million,aslightincreaseof1.326,008 million in 2023[358]. - Net earnings attributable to Berkshire shareholders increased to 3,730millionin2024,up60.02,331 million in 2023[358]. - After-tax earnings from non-controlled businesses decreased by 231millionin2024comparedto2023,primarilyduetolowerearningsfromKraftHeinzandPilot[435].−Investmentgainsin2024were52.8 billion, a decrease from 74.9billionin2023,whilenetearningswere41.6 billion[438]. - Berkshire's shareholders' equity increased by 88.1billionto649.4 billion as of December 31, 2024[444]. Insurance Operations - Insurance underwriting generated after-tax earnings of 9.0billionin2024,upfrom5.4 billion in 2023, with significant improvements at GEICO[280]. - GEICO's pre-tax underwriting earnings increased to 7.813billionin2024from3.635 billion in 2023, driven by higher average premiums and lower claims frequencies[290]. - Losses and loss adjustment expenses for GEICO decreased by 1.5billion(4.73.1 billion (7.7%) in 2024, reflecting a 7.8% increase in average written premiums per auto policy[295]. - Premiums written in the Berkshire Hathaway Reinsurance Group declined by 461million(2.11.7 billion in 2024, compared to 1.4billionin2023[316].−ThemethodologiesforestimatingIBNRliabilitiesinvolvevariousactuarialtechniques,includingpaidandincurredlossdevelopmentmethodsandBornhuetter−Fergusonmethods[473][474].InvestmentIncome−Netinvestmentincomefor2024was13.67 billion, up from 9.57billionin2023,reflectingasignificantincreaseininterestandotherinvestmentincome[330].−Interestandotherinvestmentincomeincreasedby5.5 billion in 2024 compared to 2023, primarily due to increases in U.S. Treasury Bill and short-term investment balances[331]. - Dividend income declined by 302million(5.523.355 billion compared to 2023, with a net volume increase of 6.5%[340]. - Operating revenues from consumer products increased by 7.1% in 2024 to 8.4billion,drivenbyavolumeincreaseof16.277,231 million, a 2.4% increase from 75,405millionin2023[374].−Servicegrouprevenuesincreasedto20.7 billion in 2024, a slight increase of 0.5% compared to 2023, driven by a 9.1% increase in aviation services revenues and a 14.4% increase in IPS revenues[411]. Expenses and Liabilities - Interest expense rose by 314millionin2024,totaling2,528 million, primarily due to increased borrowings[363]. - The company recorded approximately 147.6billioninconsolidatedclaimliabilitiesasofDecember31,2024,with7451.636 billion, consisting of 16.570billioninpropertyand35.066 billion in casualty[467]. - A one percentage point change in BI claims severities could result in a 220millionincreaseordecreaseinrecordedliabilities,impactingpre−taxearningscorrespondingly[465].Taxation−Berkshire′seffectiveincometaxratefor2024was20.92.9 billion of its common stock in 2024, maintaining a focus on financial strength and liquidity[445]. - Cash, cash equivalents, and U.S. Treasury Bills held by insurance and other businesses totaled 318.0billionasofDecember31,2024[446].−Consolidatedcapitalexpendituresfor2024were19.0 billion, with BNSF and BHE accounting for $12.7 billion of this total[452].