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| Stewart Title Guar Co | 50121 | | N | 2023 | | Title | | |
| Columbia Insurance Company | 27812 | 0031 | Y | 2023 | Berkshire Hathaway group of insurance companies | Property & Casualty | | |
| National Fire & Marine Insurance Company | 20079 | 0031 | Y | 2023 | Berkshire Hathaway group of insurance companies | Property & Casualty | | |
| National Liability & Fire Insurance Company | 20052 | 0031 | Y | 2023 | Berkshire Hathaway group of insurance companies | Property & Casualty | | |
| National Indemnity Company of Mid-America | 20060 | 0031 | Y | 2023 | Berkshire Hathaway group of insurance companies | Property & Casualty | | |
| National Indemnity Company of the South | 42137 | 0031 | Y | 2023 | Berkshire Hathaway group of insurance companies | Property & Casualty | | |
| Employers Mutual Casualty Company | 21415 | 0062 | Y | 2023 | EMC INS CO GRP | Property & Casualty | | |
| Finial Reinsurance Company | 39136 | 0031 | Y | 2023 | Berkshire Hathaway group of insurance companies | Property & Casualty | | |
| Wellfleet New York Insurance Company | 20931 | 0031 | Y | 2023 | Berkshire Hathaway group of insurance companies | Property & Casualty | | |
| Wellfleet Insurance Company | 32280 | 0031 | Y | 2023 | Berkshire Hathaway group of insurance companies | Property & Casualty | | |
| Berkshire Hathaway Assurance Corporation | 13070 | 0031 | Y | 2023 | Berkshire Hathaway group of insurance companies | Property & Casualty | | |
| Berkshire Hathaway Life Insurance Company of Nebraska | 62345 | 0031 | Y | 2023 | Berkshire Hathaway group of insurance companies | Life | | |
| Berkshire Hathaway Specialty Insurance Company | 22276 | 0031 | Y | 2023 | Berkshire Hathaway group of insurance companies | Property & Casualty | | |
| Emcasco Ins Co | 21407 | 0062 | Y | 2023 | EMC INS CO GRP | Property & Casualty | | |
| First Berkshire Hathaway Life Insurance Company | 11591 | 0031 | Y | 2023 | Berkshire Hathaway group of insurance companies | Life | | |