Below are the world’s largest insurance companies based on market capitalization. Berkshire Hathaway Inc, an American multinational conglomerate, ranks first in the list. Berkshire’s main insurance subsidiaries are GEICO (Government Employees Insurance Company), Berkshire Hathaway Reinsurance Group, and General Re. GEICO is the second largest private passenger auto insurer in the United States. General Re and Berkshire Hathaway Reinsurance are the largest reinsurer companies in the world.
| Rank | Company | Country | Market capitalization, US$b (November 10, 2017) |
| 1 | Berkshire Hathaway | US | 453.230 |
| 2 | Ping An Insurance | China | 186.688 |
| 3 | China Life Insurance | China | 133.140 |
| 4 | Allianz | Germany | 103.808 |
| 5 | AIA Group | Hong Kong | 95.960 |
| 6 | AXA | France | 71.437 |
| 7 | Chubb ltd | Switzerland | 70.260 |
| 8 | Prudential Plc | UK | 62.889 |
| 9 | China Pacific Insurance | China | 56.290 |
| 10 | American International Group | US | 55.789 |
| 11 | Metlife | US | 54.930 |
| 12 | Prudential Financial | US | 46.945 |
| 13 | Zurich Insurance Group | Switzerland | 45.885 |
| 14 | Manulife Financial | Canada | 41.985 |
| 15 | Travelers Companies | US | 37.097 |
| 16 | Allstate Corp | US | 35.683 |
| 17 | Munich Re | Germany | 35.311 |
| 18 | Aflac | US | 32.804 |
| 19 | Swiss RE | Switzerland | 32.555 |
| 20 | PICC Property & Casualty | China | 31.887 |
| 21 | Tokio Marine Holdings | Japan | 31.454 |
| 22 | Sampo | Finland | 29.594 |
| 23 | Progressive Corporation | US | 29.518 |
| 24 | Assicurazioni Generali | Italy | 28.644 |
| 25 | New China Life Insurance Co | China | 28.284 |
| 27 | Great West Lifeco | Canada | 27.483 |
| 26 | Aviva | UK | 26.354 |
| 28 | Samsung Life Insurance | South Korea | 24.058 |
| 29 | Sun Life Financial | Canada | 23.794 |
| 30 | Ameriprise Financial | US | 23.258 |
| 31 | People's Insurance Co. (Group) of China | China | 22.784 |
| 32 | Dai-ichi Life Holdings | Japan | 22.283 |
| 33 | Willis Towers Watson | United Kingdom | 21.334 |
| 34 | Legal & General Group | UK | 21.235 |
| 35 | Cathay Financial Holding | Taiwan | 20.491 |
| 36 | Power Financial | Canada | 20.284 |
| 37 | Hartford Financial | US | 19.805 |
| 38 | Principal Financial Group | US | 19.653 |
| 39 | MS&AD Insurance Group | Japan | 18.979 |
| 40 | Sompo Holdings | Japan | 16.734 |
| 41 | Loews Corporation | US | 16.667 |
| 42 | Standard Life | UK | 16.321 |
| 43 | Lincoln National Corp | US | 16.082 |
| 44 | Fairfax Financial Holdings | Canada | 15.897 |
| 45 | CNP Assurances | France | 15.878 |
| 46 | Hannover Re | Germany | 15.400 |
| 47 | Markel Corporation | US | 14.773 |
| 48 | NN Group | Netherlands | 14.066 |
| 49 | Suncorp Group | Australia | 13.944 |
| 50 | Aegon N.V. | Netherlands | 12.809 |
| 51 | Japan Post Insurance | Japan | 12.771 |
| 52 | Insurance Australia Group | Australia | 12.717 |
| 53 | Arch Capital Group | Bermuda | 12.479 |
| 54 | Old Mutual | UK | 12.381 |
| 55 | Cincinnati Financial Corp | US | 12.043 |