SEGMENT INFORMATION
The accounting policies used to prepare the segment reporting data for the Company’s three reportable business segments are the same as those described in the Summary of Significant Accounting Policies in note 1.
The chief operating decision maker (CODM) is the Company’s Chairman and Chief Executive Officer. The CODM reviews the financial performance of the reportable business segments to assess the efficiency with which capital is employed, the effective management of risk, the achievement of strategic initiatives, and how to allocate resources to reportable business segments based on the segment’s historical and projected financial performance. The significant measures of the reportable business segments’ financial performance include segment revenues, consisting of premiums, net investment income, fee income and other revenues, less segment expenses, consisting of claims and claim adjustment expenses, deferred acquisition costs, and general and administrative expenses.
Except as described below for certain legal entities, the Company allocates its invested assets and the related net investment income to its reportable business segments. Pre-tax net investment income is allocated based upon an investable funds concept, which takes into account liabilities (net of non-invested assets) and appropriate capital considerations for each segment. For investable funds, a benchmark investment yield is developed that reflects the estimated duration of the loss reserves’ future cash flows, the interest rate environment at the time the losses were incurred and A+ rated corporate debt instrument yields. For capital, a benchmark investment yield is developed that reflects the average yield on the total investment portfolio. The benchmark investment yields are applied to each segment’s investable funds and capital, respectively, to produce a total notional investment income by segment. The Company’s actual net investment income is allocated to each segment in proportion to the respective segment’s notional investment income to total notional investment income. There are certain legal entities within the Company that are dedicated to specific reportable business segments. The invested assets and related net investment income from these legal entities are reported in the applicable business segment and are not allocated among the other business segments.
The cost of the Company’s catastrophe treaty program is included in the Company’s ceded premiums and is allocated among reportable business segments based on an estimate of actual market reinsurance pricing using expected losses calculated by the Company’s catastrophe model, adjusted for any experience adjustments.
The following tables summarize the components of the Company’s revenues, income (loss), net written premiums and total assets by reportable business segments.
(for the year ended December 31, in millions)Business
Insurance
Bond &
Specialty
Insurance
Personal
Insurance
Total
Reportable
Segments
2025
Premiums$22,412 $4,107 $17,395 $43,914 
Net investment income2,782 445 732 3,959 
Fee income445  50 495 
Other revenues379 27 102 508 
Total segment revenues (1)
26,018 4,579 18,279 48,876 
Claims and claim adjustment expenses14,154 1,764 11,303 27,221 
Amortization of deferred acquisition costs3,796 778 2,692 7,266 
General and administrative expenses3,482 843 1,746 6,071 
Income tax expense891 244 485 1,620 
Segment income (1)
$3,695 $950 $2,053 $6,698 
2024
Premiums$21,345 $3,958 $16,638 $41,941 
Net investment income2,560 390 640 3,590 
Fee income430 — 43 473 
Other revenues322 30 97 449 
Total segment revenues (1)
24,657 4,378 17,418 46,453 
Claims and claim adjustment expenses13,679 1,774 11,606 27,059 
Amortization of deferred acquisition costs3,588 756 2,629 6,973 
General and administrative expenses3,303 832 1,640 5,775 
Income tax expense781 201 294 1,276 
Segment income (1)
$3,306 $815 $1,249 $5,370 
2023
Premiums$19,144 $3,655 $14,962 $37,761 
Net investment income2,085 328 509 2,922 
Fee income400 — 33 433 
Other revenues232 25 96 353 
Total segment revenues (1)
21,861 4,008 15,600 41,469 
Claims and claim adjustment expenses12,696 1,485 12,034 26,215 
Amortization of deferred acquisition costs3,173 673 2,380 6,226 
General and administrative expenses3,041 681 1,417 5,139 
Income tax expense (benefit)368 227 (103)492 
Segment income (loss) (1)
$2,583 $942 $(128)$3,397 
_________________________________________
(1)Segment revenues for reportable business segments exclude net realized investment gains (losses) and revenues included in “interest expense and other.” Segment income (loss) for reportable business segments excludes the after-tax impact of net realized investment gains (losses) and income (loss) from “interest expense and other.”
Prior year reserve development and catastrophe losses by reportable business segments were as follows:
(for the year ended December 31, in millions)Business
Insurance
Bond &
Specialty
Insurance
Personal
Insurance
Total
Reportable
Segments
2025
Net favorable prior year reserve development$233 $221 $582 $1,036 
Catastrophe losses$1,073 $25 $2,592 $3,690 
2024
Net favorable prior year reserve development$90 $129 $490 $709 
Catastrophe losses$1,032 $51 $2,252 $3,335 
2023
Net favorable (unfavorable) prior year reserve development$(289)$285 $147 $143 
Catastrophe losses$838 $37 $2,116 $2,991 
The following table presents the Company’s amortization and depreciation expense by reportable business segment (excluding the amortization of deferred acquisition costs which is disclosed separately in the table above with segment income (loss) by reportable business segment).
(for the year ended December 31, in millions)202520242023
Business Insurance$409 $426 $467 
Bond & Specialty Insurance82 86 71 
Personal Insurance182 197 178 
Total$673 $709 $716 
Net written premiums by market were as follows:
(for the year ended December 31, in millions)202520242023
Business Insurance:
Domestic:
Select Accounts$3,830 $3,727 $3,477 
Middle Market12,541 12,023 11,045 
National Accounts1,262 1,259 1,135 
National Property and Other3,112 3,134 3,008 
Total Domestic20,745 20,143 18,665 
International1,934 1,935 1,765 
Total Business Insurance22,679 22,078 20,430 
Bond & Specialty Insurance:
Domestic:
Management Liability2,326 2,309 2,156 
Surety1,354 1,294 1,147 
Total Domestic3,680 3,603 3,303 
International582 506 539 
Total Bond & Specialty Insurance4,262 4,109 3,842 
Personal Insurance:
Domestic:
Automobile7,745 7,925 7,330 
Homeowners and Other9,051 8,550 7,949 
Total Domestic16,796 16,475 15,279 
International650 694 650 
Total Personal Insurance17,446 17,169 15,929 
Total consolidated net written premiums$44,387 $43,356 $40,201 
Business Segment Reconciliations
(for the year ended December 31, in millions)202520242023
Revenue reconciliation
Earned premiums
Business Insurance:
Domestic:
Workers’ compensation$3,360 $3,470 $3,467 
Commercial automobile3,942 3,590 3,215 
Commercial property3,772 3,616 3,154 
General liability3,566 3,464 3,146 
Commercial multi-peril5,797 5,269 4,686 
Other76 73 76 
Total Domestic20,513 19,482 17,744 
International1,899 1,863 1,400 
Total Business Insurance22,412 21,345 19,144 
Bond & Specialty Insurance:
Domestic:
Fidelity and surety1,492 1,416 1,290 
General liability1,838 1,778 1,639 
Other239 231 225 
Total Domestic3,569 3,425 3,154 
International538 533 501 
Total Bond & Specialty Insurance4,107 3,958 3,655 
Personal Insurance:
Domestic:
Automobile7,902 7,767 6,923 
Homeowners and Other8,824 8,208 7,404 
Total Domestic16,726 15,975 14,327 
International669 663 635 
Total Personal Insurance17,395 16,638 14,962 
Total earned premiums43,914 41,941 37,761 
Net investment income3,959 3,590 2,922 
Fee income495 473 433 
Other revenues508 449 353 
Total segment revenues48,876 46,453 41,469 
Net realized investment losses(48)(30)(105)
Total revenues$48,828 $46,423 $41,364 
Income reconciliation, net of tax
Total segment income$6,698 $5,370 $3,397 
Interest Expense and Other (1)
(373)(345)(325)
Core income6,325 5,025 3,072 
Net realized investment losses(37)(26)(81)
Net income$6,288 $4,999 $2,991 
______________________________________
(1)    The primary component of Interest Expense and Other was after-tax interest expense of $336 million, $310 million and $297 million in 2025, 2024 and 2023, respectively.
(as of December 31, in millions)20252024
Asset reconciliation:
Business Insurance$106,084 $98,311 
Bond & Specialty Insurance13,676 12,628 
Personal Insurance22,787 21,138 
Total assets for reportable segments142,547 132,077 
Other assets (1)
1,161 1,112 
Total consolidated assets$143,708 $133,189 
___________________________________________
(1)    The primary components of other assets as of both December 31, 2025 and 2024, were the over-funded benefit plan assets related to the Company’s qualified domestic pension plan and other intangible assets.
Enterprise-Wide Disclosures
The Company does not have revenue from transactions with a single customer amounting to 10 percent or more of its revenues.
The following table presents revenues of the Company’s operations based on location.
(for the year ended December 31, in millions)202520242023
U.S.$46,360 $43,924 $39,086 
Non-U.S.:
Canada1,345 1,359 1,281 
Other Non-U.S.1,123 1,140 997 
Total Non-U.S.2,468 2,499 2,278 
Total revenues$48,828 $46,423 $41,364 

Historical Timeline

Fiscal YearFiled
2025Feb 12, 2026Showing above
2024Feb 13, 2025
2023Feb 15, 2024
2022Feb 16, 2023
2021Feb 17, 2022
2020Feb 11, 2021
2019Feb 13, 2020
2018Feb 14, 2019
2017Feb 15, 2018
2016Feb 16, 2017
2015Feb 11, 2016

About Segments Disclosures

Segment disclosures break a company into its reportable operating units, revealing revenue, profit, and asset allocation that consolidated financial statements obscure. Under ASC 280, segments must match how the chief operating decision maker views the business, providing a window into internal management structure and resource allocation priorities.

Key signals: compare segment margins to identify which units drive profitability and which destroy value. Watch for changes in the number of reportable segments — segment aggregation or disaggregation often coincides with strategic shifts or attempts to obscure declining performance. Intersegment elimination patterns reveal internal pricing practices. The reconciliation between segment totals and consolidated figures exposes corporate overhead allocation and unallocated items. Geographic revenue concentration highlights regulatory and currency exposure. Compare segment-level capital expenditure against segment revenue to assess where management is investing for future growth versus harvesting existing assets.