4th Look 2025: Market Share Report for MA Commercial Auto Insurance Marketplace

Latest Data on Insurer Premiums & Market Share

Our latest update on the Commercial Auto Insurance marketplace examines activity during April 2025. As we note in each of our reports, this analysis is based upon data provided by the Commonwealth Automobile Reinsurers (CAR).

For readers who may be unfamiliar with CAR, the authority serves as the official statistical agent for motor vehicle insurance in Massachusetts, collecting and maintaining data for the Commonwealth’s motor vehicle insurance industry.

Comments and insights courtesy of Chat GPT

The following insights come from a simple comparison of April 2025 market share data with April 2024 market share data for the commercial auto insurance marketplace. This is simply to spur discussion and for purposes of showing movements and potential trends as we head into the second half of the year.

Safety Surpasses Commerce as Market Leader

Safety Insurance increased premiums by $5.96 million (from $56.7M to $62.6M), raising its market share from 13.35% to 13.59%, from April 2024 to April 2025. In comparison of year over year data, Commerce premiums dropped during the same timeframe from 14.63% to 12.67% despite a nominal decline of only $3.7M in premiums.

Overall Market Expansion

Looking at the entire commercial auto insurance marketplaces trajectory from April 2024 to April 2025, total reported premiums rose from $424.6 million as of April 2024 to $460.8 million as of April 2025, an increase of $36.2 million, or approximately 8.5% year-over-year.

This broader market growth diluted some carriers’ market share despite rising absolute premium totals (e.g., Progressive and Travelers grew in premiums but declined or stayed nearly flat in share).

Arbella Shows Strong Organic Growth

Looking at this specific timeframe, Arbella Insurance grew from $46.0M to $52.6M, gaining $6.5M in premiums and increasing market share from 10.84% to 11.41%. While the Quincy-based insurer remains the third largest commercial auto insurer int he Commonwealth, it could be argued that it is narrowing the gap with Commerce by apprearing to grow at a faster clip than both Safety and Commerce.

Emerging Gains in Mid-Tier Carriers

Several regional or specialty carriers had significant gains in premium volume, year-over-year including:

Plymouth Rock: Up from $19.3M to $22.7M, growing its market share from 4.54% as of April 2024 to 4.92% as of April 2025
Zurich: Grew from $11.75M to $14.44M, improving its market share from 2.77% to 3.13%.
Selective Insurance: Increased from $10.75M to $12.25M, a rise of 14%.

New Market Dynamics: Consolidation at the Top, Fragmentation Below

The top five carriers in 2025 account for 55.93% of the market, down from 56.52% in 2024.
More than 20 carriers each have less than 1% market share in 2025, indicating sustained fragmentation in the lower tiers of the commercial lines market.
Some lower-ranked companies like Old Republic, GEICO, and Quincy Mutual posted strong year-over-year gains, possibily indicating targeted expansion.

Commercial Auto Insurers Ranked by Premiums & Market Share as of April 2025

Company	Premiums	Market Share
SAFETY	$62,635,375	13.59%
COMMERCE	$58,379,826	12.67%
ARBELLA	$52,554,945	11.41%
PROGRESSIVE	$45,179,425	9.80%
TRAVELERS	$34,391,684	7.46%
PLYMOUTH ROCK	$22,693,709	4.92%
FIREMAN’S	$18,030,919	3.91%
TOKIO MARINE & NACHIDO	$15,734,692	3.41%
ZURICH	$14,443,987	3.13%
SELECTIVE INSURANCE	$12,245,318	2.66%
HANOVER	$12,211,982	2.65%
TWIN CITY FIRE INS	$10,313,918	2.24%
AMERICAN CASUALTY	$8,986,082	1.95%
LIBERTY MUTUAL INS	$8,695,050	1.89%
UTICA	$8,066,541	1.75%
GREEN MOUNTAIN	$6,461,027	1.40%
FEDERATED MUTUAL	$5,343,082	1.16%
FEDERAL	$5,333,404	1.16%
GEICO	$4,819,131	1.05%
OLD REPUBLIC	$4,340,697	0.94%
CENTRAL MUTUAL INS	$4,325,293	0.94%
FARM FAMLY	$4,186,756	0.91%
N&D MUTUAL	$3,914,363	0.85%
EMPLOYERS MUTUAL	$3,658,136	0.79%
NEW YORK AND GENERAL INS	$3,497,800	0.76%
CINCINNATI	$2,877,375	0.62%
MIDDLESEX INS CO	$2,721,723	0.59%
BANKERS	$2,711,820	0.59%
NEW HAMPSHIRE	$2,403,020	0.52%
US FIRE	$2,255,168	0.49%
MERCH MUTUAL	$2,033,334	0.44%
ARCH	$1,934,908	0.42%
GREAT AMERICAN	$1,735,297	0.38%
QUINCY MUTUAL	$1,369,984	0.30%
MOBILITAS GENERAL INS.	$1,088,934	0.24%
SECURITY NATIONAL	$1,021,960	0.22%
MOTORISTS	$1,021,458	0.22%
PREFERRED MUTUAL	$983,388	0.21%
ARGONAUT	$952,307	0.21%
GREENWICH	$795,375	0.17%
IMPERIUM	$636,240	0.14%
LANCER INSURANCE CO.	$589,849	0.13%
HARLEYSVILLE INS	$566,397	0.12%
STATE AUTO	$377,868	0.08%
ATLANTIC SPECIALTY	$345,431	0.07%
STARR INDEMNITY	$298,849	0.06%
EVEREST NATIONAL	$293,573	0.06%
CHURCH MUTUAL	$189,251	0.04%
PENN LUMBERMENS	$186,365	0.04%
QBE	$176,908	0.04%
PENN MNFCT ASSC INS	$159,576	0.03%
SOMPO AMERICA	$141,680	0.03%
AXIS REINSURANCE	$88,618	0.02%
FALLS LAKE	$80,233	0.02%
AMERICAN AUTOMOBILE	$59,982	0.01%
ALLIED WORLD SPECIALTY	$49,457	0.01%
AMICA MUTUAL	$45,186	0.01%
STATE FARM	$40,567	0.01%
CUMIS	$28,450	0.01%
BERKSHIRE HATHAWAY	$26,271	0.01%
GUIDEONE MUTUAL	$17,416	0.00%
MITSUI SUMITOMO	$15,496	0.00%
MARKEL AMERICAN	$11,405	0.00%
AMERICAN FAMILY	$8,898	0.00%
AMERICAN ALTERNATIVE	$5,915	0.00%
STARSTONE NATIONAL	$882	0.00%
RLI	$330	0.00%
Total	$460,790,286	100.00%

Agency Checklists’ Proprietary Retrospective of the Commercial Auto Marketplace

The following are graphs depicting the state of the Commercial Auto Insurance Marketplace over the past 10 years. The first graph shows the top ten Commercial Auto Insurers as of April 2025, compared to April 2024, April 2023, April 2022, and April 2021. Following these comparisons are two more: one from five years ago, April 2020, and the last from ten years ago, April 2015.