Best's News


Best’s Rankings: Liberty Mutual, CNA, Chubb Stay at Top in US Inland Marine

    print icon

OLDWICK, N.J. //BestWire// - U.S. inland marine direct premiums written increased 14.9% to $29.82 billion. Premiums rose as much as 66.4% among nine of the top-10 insurers, according to a new Best’s Ranking report.



Liberty Mutual Insurance Cos. remained the largest writer with a 13.7% market share as DPW rose 4.9% to $4.08 billion. CNA insurance Cos. grew premiums 3.1% to $3.64 billion to remain second, while Chubb INA Group saw double-digit growth of 14.1% as the third-largest U.S. marine inland insurer.

Insurtech Lemonade Insurance Co. jumped from No. 98 to No. 54 after DPW jumped 418.1% to $64 million.

Allianz US PC Insurance Cos. boosted DPW 66.4% and climbed four positions to the No. 4 spot.

In the top 10, FM Global was the sole group to reduce DPW, by 17.7% to $809.4 million.

The report includes 2021 direct premiums written for the top 100 U.S. inland marine writers and the percent change from the previous year. The information for each company or group in this study also includes market share and adjusted loss ratios for 2021, 2020 and 2019, and inland marine insurance as a percentage of the company’s total premiums.

Subscribers to Best’s News and Research Service can download the report at no charge, including full data in spreadsheet format.

Subscribers can access the report and data here.

Learn more about Best’s News and Research Service.

(By Renée Kiriluk-Hill, associate editor, BestWire: Renee.Kiriluk-Hill@ambest.com)



Best's Rankings Property And Casualty Insurers


Latest News

More from Best’s News


Trending


2
NATIONAL ASSOCIATION OF INSURANCE COMMISSIONERS
Update: NAIC Discloses Data Breach in Software System
Jun 23, 2026 04:18 PM (EDT)

3
BEST'S CREDIT RATING ACTION
AM Best Affirms Credit Ratings of National Indemnity Company and Its Affiliates
Apr 16, 2026 12:04 PM (EDT)

4
AM BEST BRIEFINGS
Directors and Officers Market Faces Rising Geopolitical, AI Uncertainty
Jun 24, 2026 11:18 AM (EDT)

5

1
NATIONAL ASSOCIATION OF INSURANCE COMMISSIONERS
Update: NAIC Discloses Data Breach in Software System
Jun 23, 2026 04:18 PM (EDT)

2
PERSONAL AUTOMOBILE INSURANCE
Lemonade Expands Autonomous Insurance That Lowers Rates When Tesla Cars Are Self-Driving
Jun 22, 2026 04:39 PM (EDT)


4
WAR RISK INSURANCE
Chubb Leads Lloyd's War Risk Consortium for Hormuz Transit Risks
Jun 22, 2026 02:27 PM (EDT)



    

1
PEOPLE IN INSURANCE
AIG Completes Planned Leadership Transition on June 1
Apr 27, 2026 11:31 AM (EDT)




5
BEST'S CREDIT RATING ACTION
AM Best Affirms Credit Ratings of Skyward Specialty Insurance Group’s Members
Aug 14, 2025 10:54 AM (EDT)