Directory · Delaware · Inland marine

Who writes inland marine in Delaware

Top insurer groups from the NAIC market share report; the state's list carries no lines of authority.

Assurant Inc Group wrote the most inland marine in Delaware in 2025, $216.9M and 51.5% of the state's premium; the top five groups hold 82%. Delaware's company list doesn't say which lines each company is licensed for, so the ranking below is the NAIC's top 10 groups; every licensed company is on the Delaware page.

By Sam Alishahi, independent insurance broker · All lines in Delaware

Top 10 · NAIC table: 09.1 - Inland Marine

The insurer groups that write the most inland marine in Delaware

Top 10 insurer groups by direct premium written in 2025, from the NAIC's Market Share Reports for Property/Casualty Groups and Companies by State. A group is the parent and its insurance companies together; share is the group's part of the state total for the line; loss ratio is losses incurred over premium earned.

#	Insurer group	Premium written	Share	Loss ratio	Member companies here
1	Assurant Inc Group	$216.9M	51.51%	99%	Virginia Surety Company, Inc., American Bankers Insurance Company of Florida, American Security Insurance Company, Standard Guaranty Insurance Company
2	AMEX Assurance Company	$90.4M	21.48%	93%	—
3	Liberty Mutual Group	$18.3M	4.33%	46%	Safeco Insurance Company of America, Liberty Insurance Underwriters, Inc., Liberty Mutual Fire Insurance Company, Liberty County Mutual Insurance Company
4	Generali Group	$14.0M	3.31%	29%	Generali (United States Branch)
5	Allianz Insurance Group	$7.7M	1.83%	34%	Allianz Global Risks US Insurance Company, Jefferson Insurance Company, Fireman's Fund Insurance Company, AGCS Marine Insurance Company
6	Cna Insurance Group	$7.3M	1.74%	50%	Continental Casualty Company, Continental Insurance Company, (The), American Casualty Company of Reading, Pennsylvania, National Fire Insurance Company of Hartford
7	Chubb Ltd Group	$6.2M	1.48%	31%	Federal Insurance Company, Ace American Insurance Company, Ace Property and Casualty Insurance Company, Chubb Lloyd's Insurance Company of Texas
8	American International Group	$6.0M	1.43%	38%	National Union Fire Insurance Company of Pittsburgh, Pennsylvania, AIG Property Casualty Company, Lexington Insurance Company, AIU Insurance Company
9	Markel Group	$5.0M	1.18%	73%	State National Insurance Company, Inc., Markel Insurance Company, Markel American Insurance Company, Essentia Insurance Company
10	Zurich Insurance Group	$3.6M	0.84%	11%	Zurich American Insurance Company, Rural Community Insurance Company, American Zurich Insurance Company, American Guarantee and Liability Insurance Company

Turned down?

Last resort for inland marine in Delaware

Last resort	Lines	Where	How to get in
Surplus lines and Lloyd's open market	all	all states, under each state's diligent-search rules	Through surplus lines wholesalers; commercial property and liability have no guaranteed plan, so this is their last step	Source

Method and source

Source: the Delaware insurance regulator company list, read 2026-10-18. Delaware DOI Active Company List (sheet 'Active Company 10.01.2026'; updated monthly, link scraped from https://insurance.delaware.gov/divisions/berg/authorizedcompanies/). All 2279 active rows kept with COMPANY TYPE so the merge can filter (e.g. type == 'Property Casualty'); no lines of authority in the file; 1686 rows carry a NAIC code (TPAs, PBMs, rating/advisory orgs, reinsurance intermediaries and premium finance companies mostly do not). No DE surplus lines eligibility list exists (NRRA home-state rule + NAIC Quarterly Listing of Alien Insurers); DE-domiciled surplus lines insurers are in admitted with type 'Domestic Surplus Lines Company'. Types: Property Casualty 937; Life And Health 444; Third Party Administrator 334; Risk Retention Group 117; Accredited Reinsurer 79; Reciprocal Jurisdiction 66; Pharmacy Benefits Manager 62; Reinsurance Intermediary 45; Domestic Surplus Lines Company 38; Certified Reinsurer 28; Title 25; Fraternal 22; Rating Organization 21; Premium Finance Company 18; Health Maintenance Organization 13; Advisory Organization 6; Dental Plan Organization 6; Multiline Company 3; Medicare Prescription Drug Plan 3; Captive Insurer 3; Surety Company 2; Health Service Organization 2; Workers Comp Self Insurance Fund 2; Captive Risk Retention Group 1; Domiciled Trust 1; Manage Care Organization 1 "Premium" is direct premium written in the state for the year shown; "share" is that company's part of the state total for the line. A company can be licensed for a line and write none of it, and a surplus lines insurer can write a line without a state license for it.

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