Company lists · Data refreshed October 2026

Top 25 Insurance underwriting agencies based in the United States

Name: Insurance underwriting agencies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 17, 2026 1,826 companies tracked

RevenueBase identified 1,826 company matches for insurance underwriting agencies associated with the United States as of October 2026 and tracks 23,535 professional contacts across them, including 10,220 with verified work emails. Houston is the largest hub.

This list covers company matches for insurance underwriting agencies associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 17, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Oct 17, 2026 How this list was built

1,826Companies

23,535Contacts tracked

10,220Verified emails

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The 25 largest insurance underwriting agencies based in the United States

Ranked by team size

Top 25 of 1,826 company matches for insurance underwriting agencies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 17, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	RT Specialty	Exact match	Chicago, IL, United StatesHQ recorded Oct 17, 2026	1,001-5,000	3,006 contacts →
	Exact match “RT Specialty is a leading wholesale distributor of specialty insurance products and services and the wholesale broking specialty for Ryan Specialty.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
2	USLI	Exact match	Wayne, PA, United StatesHQ recorded Oct 17, 2026	1,001-5,000	1,335 contacts →
	Exact match “We aspire to be the very best insurance company at underwriting insurance products for our customers.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
3	ISO	Exact match	Jersey City, NJ, United StatesHQ recorded Oct 17, 2026	5,001-10,000	1,133 contacts →
	Exact match “Underwriting solutions at Verisk is a leading provider of advanced tools and analytics for the property/casualty and life insurance industries.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
4	AIA Insurance	Exact match	Pullman, WA, United StatesHQ recorded Oct 17, 2026	n/a	1,008 contacts →
	Exact match “For over 100 years we have served the specific insurance needs of our local clients.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
5	Fortegra	Exact match	Jacksonville, FL, United StatesHQ recorded Oct 17, 2026	501-1,000	589 contacts →
	Exact match “For more than 45 years, Fortegra and its subsidiaries have delivered risk management solutions that help people and businesses succeed in the face of uncertainty.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
6	Brown & Riding	Exact match	Dallas, TX, United StatesHQ recorded Oct 17, 2026	201-500	472 contacts →
	Exact match “Brown & Riding was founded in 1980 and is one of the largest wholesale insurance brokerage firms in the United States.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
7	Jencap	Exact match	New York, NY, United StatesHQ recorded Oct 17, 2026	1,001-5,000	450 contacts →
	Exact match “Jencap is a national wholesale insurance intermediary serving retail agents through wholesale brokerage, binding authority, and program management.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
8	Hull & Company	Exact match	Stockton, CA, United StatesHQ recorded Oct 17, 2026	201-500	447 contacts →
	Exact match “Hull & Company is a wholesale insurance broker and managing general agency.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
9	ALL Risks, LTD	Exact match	Hunt Valley, MD, United StatesHQ recorded Oct 17, 2026	501-1,000	428 contacts →
	Exact match “On September 1, 2020 Ryan Specialty Group, LLC (RSG) and All Risks, Ltd.(All Risks) merged the two firms into Ryan Specialty Group.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
10	CRC Swett	Exact match	Atlanta, GA, United StatesHQ recorded Oct 17, 2026	1,001-5,000	335 contacts →
	Exact match “CRC Swett has over 100 years of experience in helping to mitigate the risks of doing business here and around the globe.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
11	Atlantic Casualty Insurance CO	Exact match	Goldsboro, NC, United StatesHQ recorded Oct 17, 2026	201-500	333 contacts →
	Exact match “Atlantic Casualty Insurance Company (Atlantic Casualty) was formed by Strickland Insurance Group (SIG) in 1983 to underwrite a substantial book of non-standard personal auto.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
12	One80 Intermediaries	Exact match	Boston, United StatesHQ recorded Oct 17, 2026	1,001-5,000	313 contacts →
	Exact match “One80 Intermediaries is a privately held firm with offices throughout the US and Canada.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
13	US Assure	Exact match	Jacksonville, FL, United StatesHQ recorded Oct 17, 2026	51-200	259 contacts →
	Exact match “As a division of Ryan Specialty Underwriting Managers, US Assure distributes, underwrites and services construction and property insurance products across the U.S.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
14	Estrella Insurance	Exact match	Coral Gables, FL, United StatesHQ recorded Oct 17, 2026	51-200	213 contacts →
	Exact match “Lowest rates, guaranteed… For 40 years, we have lived up to that motto and built a track record we’re proud of, providing clients with quality insurance coverage while helping…” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
15	Genstar Insurance Services, LLC	Exact match	Stamford, CT, United StatesHQ recorded Oct 17, 2026	51-200	202 contacts →
	Exact match “GenStar Insurance Services, LLC is a premier provider of excess, surplus, and specialty property and casualty insurance written on General Star Indemnity Company (non-admitted)…” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
16	Maury Donnelly & Parr INC	Exact match	Baltimore, MD, United StatesHQ recorded Oct 17, 2026	201-500	149 contacts →
	Exact match “Maury Donnelly & Parr, Inc.(MDP) was founded in 1875, initially providing insurance solutions for marine industry-serving trade businesses and other mercantile transactions…” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
17	Insurance Service Center	Exact match	Fayetteville, NC, United StatesHQ recorded Oct 17, 2026	11-50	141 contacts →
	Exact match “Welcome to the Insurance Service Center, an independent insurance agency serving the North Carolina for over 30 years.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
18	Orchid Insurance	Exact match	Vero Beach, FL, United StatesHQ recorded Oct 17, 2026	51-200	121 contacts →
	Exact match “Orchid Underwriters Agency, LLC (“Orchid Insurance”), a member of Brown & Brown's Arrowhead Programs family, is a premier leader in program underwriting services and distribution…” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
19	Spectrum Insurance Group	Exact match	Eau Claire, WI, United StatesHQ recorded Oct 17, 2026	51-200	110 contacts →
	Exact match “Spectrum Insurance is one of the largest independent insurance agencies in Wisconsin.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
20	Realign Insurance Holdings, INC	Exact match	Irving, TX, United StatesHQ recorded Oct 17, 2026	51-200	109 contacts →
	Exact match “ReAlign Insurance Holdings, Inc.(“RIH”) was formed by ReAlign Capital Strategies, LLC in partnership with Align Financial Holdings, LLC and private investors in January 2020 for…” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
21	Pyramid Insurance Centre, LTD	Exact match	Honolulu, HI, United StatesHQ recorded Oct 17, 2026	51-200	100 contacts →
	Exact match “Pyramid Insurance Centre, a Marsh & McLennan Agency LLC company, has served the PERSONAL and COMMERCIAL INSURANCE needs of Hawaii for nearly 40 years.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
22	MED James, INC	Exact match	Overland Park, KS, United StatesHQ recorded Oct 17, 2026	51-200	100 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
23	AIS Insurance	Exact match	Irvine, CA, United StatesHQ recorded Oct 17, 2026	501-1,000	96 contacts →
	Exact match “Founded in 1968 in California, AIS began with a single mission: to make insurance simple and affordable.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
24	Verus Specialty Insurance A Berkley Company	Exact match	Glen Allen, VA, United StatesHQ recorded Oct 17, 2026	51-200	94 contacts →
	Exact match “Verus Specialty Insurance is an underwriting management company targeting small to midsize commercial risks in the E&S and Specialty insurance markets through appointed wholesale…” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase
25	Wellington Insurance Group	Exact match	Fort Worth, TX, United StatesHQ recorded Oct 17, 2026	51-200	90 contacts →
	Exact match “Wellington Insurance Group is a Texas-based risk distribution and financial services organization specializing in the delivery and administration of residential property insurance.” Recorded in the RevenueBase company graph · Oct 17, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “insurance underwriting agencies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 1,826 insurance underwriting agencies based in the United States

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Insurance underwriting agencies based in the United States at a glance

As of Oct 17, 2026

43.4%Verified-email coverage

12.9Average contacts per company

1-10Median size (employees)

1.6%Largest-city concentration · Houston

Oct 17, 2026Page data refreshed

Companies by employee count

1-10

1,200

11-50

500

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,826 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United States whose business descriptions match “insurance underwriting agencies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every displayed company carries at least one verified work email. RevenueBase tracks 10,220 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on October 17, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Insurance underwriting agencies by metro

Insurance underwriting agencies in Houston30

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “insurance underwriting agencies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many insurance underwriting agencies are there based in the United States?

RevenueBase identified 1,826 company matches for insurance underwriting agencies associated with the United States as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

RT Specialty tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most insurance underwriting agencies?

Houston leads with 30 company records, followed by New York (23) and Miami (17).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 10,220 professional contacts with verified work emails tracked across these 1,826 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 17, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.