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SEC industry · SIC 6331

Fire, Marine & Casualty Insurance stocks

12 distinct companies in our coverage share this SEC industry code, including American International Group, Inc. (AIG), Arch Capital Group Ltd. (ACGL), Berkshire Hathaway Inc. (BRK-B). Explore what each business does and open its annual filing below.

What this peer group tells you

The SEC classifies these issuers under “Fire, Marine & Casualty Insurance” (SIC 6331). A shared code is a starting point for finding comparable businesses. Product mix, geography and customers can still differ substantially. Read the company descriptions before treating the group as direct competitors.

This group has 1 disclosed fiscal year-end date. Align the reporting periods before comparing annual results. The calendar below shows each company’s year end separately from its filing date.

SEC data snapshot: . The linked reports are the annual filings stored in that snapshot; newer filings may exist. This is a coverage directory, not a complete industry census or a ranking of investments. Multiple share classes of one issuer count as one company.

Company profiles and annual filings

Berkshire Hathaway Inc. (BRK-B)

Berkshire Hathaway is a diversified holding company with insurance, railroad, energy, and manufacturing operations, plus a large equity portfolio. Built by Warren Buffett, it is renowned for disciplined capital allocation.

Fiscal year end in SEC snapshot
December 31
Annual report period end
2025-12-31
10-K filed 2026-03-02

Chubb Limited (CB)

Chubb is a global property-and-casualty insurer serving commercial and high-net-worth personal clients.

Fiscal year end in SEC snapshot
December 31
Annual report period end
2025-12-31
10-K filed 2026-02-27

Loews Corporation (L)

Loews Corporation is a holding company with interests in commercial insurance, energy, and hospitality.

Fiscal year end in SEC snapshot
December 31
Annual report period end
2025-12-31
10-K filed 2026-02-10

Markel Group Inc. (MKL)

Markel Group is a specialty insurer that also holds a diversified portfolio of investments and businesses.

Fiscal year end in SEC snapshot
December 31
Annual report period end
2025-12-31
10-K filed 2026-02-26

Compare companies in this industry

ACGL vs AIG

Compare Arch Capital Group Ltd. and American International Group, Inc.: business context, fiscal calendars and official filings.

ACGL vs ALL

Compare Arch Capital Group Ltd. and The Allstate Corporation: business context, fiscal calendars and official filings.

ACGL vs BRK-B

Compare Arch Capital Group Ltd. and Berkshire Hathaway Inc.: business context, fiscal calendars and official filings.

ACGL vs CB

Compare Arch Capital Group Ltd. and Chubb Limited: business context, fiscal calendars and official filings.

ACGL vs CINF

Compare Arch Capital Group Ltd. and Cincinnati Financial Corporation: business context, fiscal calendars and official filings.

ACGL vs HIG

Compare Arch Capital Group Ltd. and The Hartford Financial Services Group, Inc.: business context, fiscal calendars and official filings.

Sources and directory method

Industry codes and annual filing references come from the SEC submissions snapshot linked to each issuer in our company catalog. Only groups with at least three distinct issuers, business descriptions and annual filing links are included.

SEC Standard Industrial Classification code list explains the classification system. Read our research methodology or browse all industry directories.

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