Company lists · Data refreshed September 2026

Top 25 Offshore support vessel operators based in the United States

Name: Offshore support vessel operators based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 454 companies tracked

RevenueBase identified 454 offshore support vessel operators headquartered in the United States as of September 2026 and tracks 40,439 professional contacts across them, including 7,927 with verified work emails. Houston is the largest hub.

This list covers offshore support vessel operators headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

454Companies

40,439Contacts tracked

7,927Verified emails

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The 25 largest offshore support vessel operators based in the United States

Ranked by team size

Top 25 of 454 offshore support vessel operators based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to offshore support vessel operators: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Noble Corporation	Partial evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	5,001-10,000	5,601 contacts →
	Partial evidence “Noble is a leading offshore drilling contractor for the oil and gas industry.” Source: RevenueBase Database · checked Sep 20, 2026
2	Tidewater	Strong evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	5,001-10,000	3,290 contacts →
	Strong evidence “Tidewater Inc.(Tidewater) is the owner and operator of the world’s largest Offshore Support Vessel (OSV) fleet.” Source: RevenueBase Database · checked Sep 20, 2026
3	Valaris Limited	Indirect evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	5,001-10,000	3,173 contacts →
	Indirect evidence “We Are Valaris With decades of expertise and strategic commitment built on efficiency, capability and ingenuity, our sights are continually set toward a future built with purpose…” Source: RevenueBase Database · checked Sep 20, 2026
4	Edison Chouest Offshore	Partial evidence	Cut Off, LA, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,853 contacts →
	Partial evidence “Recognized Worldwide for Diverse and Dynamic Marine Transportation Solutions Founded as Edison Chouest Boat Rental in Galliano, Louisiana, in 1960, the Edison Chouest Offshore…” Source: RevenueBase Database · checked Sep 20, 2026
5	Helix Energy Solutions Group	Partial evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,706 contacts →
	Partial evidence “Helix Energy Solutions, headquartered in Houston, Texas, is an international offshore energy services company that provides specialty services to the offshore energy industry…” Source: RevenueBase Database · checked Sep 20, 2026
6	Hornbeck Offshore	Partial evidence	Covington, LA, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,418 contacts →
	Partial evidence “Hornbeck Offshore Services, Inc.” Source: RevenueBase Database · checked Sep 20, 2026
7	Moran Towing Corporation	Indirect evidence	New Canaan, CT, United StatesHQ checked Sep 20, 2026	501-1,000	619 contacts →
	Indirect evidence “Moran Towing is a leading provider of ship docking, marine transportation, and LNG activities, as well as contract, specialty, and general towing services.” Source: RevenueBase Database · checked Sep 20, 2026
8	Overseas Shipholding Group	Indirect evidence	Tampa, FL, United StatesHQ checked Sep 20, 2026	501-1,000	609 contacts →
	Indirect evidence “Overseas Shipholding Group, Inc.” Source: RevenueBase Database · checked Sep 20, 2026
9	Pacific Drilling	Indirect evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	501-1,000	538 contacts →
	Indirect evidence “On April 15, 2021, Noble Corporation plc completed its acquisition of Pacific Drilling Company LLC.” Source: RevenueBase Database · checked Sep 20, 2026
10	Foss Maritime Company	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 20, 2026	501-1,000	531 contacts →
	Indirect evidence “Foss Maritime provides comprehensive marine transportation and logistics services.” Source: RevenueBase Database · checked Sep 20, 2026
11	Seacor Marine Holdings	Partial evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	501-1,000	404 contacts →
	Partial evidence “Fleet diversity to meet every offshore need.” Source: RevenueBase Database · checked Sep 20, 2026
12	Harvey Gulf International Marine	Strong evidence	New Orleans, LA, United StatesHQ checked Sep 20, 2026	501-1,000	400 contacts →
	Strong evidence “Harvey Gulf International Marine, LLC is a marine transportation company that specializes in providing Offshore Supply and Multi-Purpose Support Vessels for deepwater operations…” Source: RevenueBase Database · checked Sep 20, 2026
13	Centerline Logistics Corporation	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 20, 2026	501-1,000	383 contacts →
	Indirect evidence “Centerline Logistics is a leading provider of marine transportation services in the United States.” Source: RevenueBase Database · checked Sep 20, 2026
14	The Vane Brothers Company	Indirect evidence	Baltimore, MD, United StatesHQ checked Sep 20, 2026	501-1,000	363 contacts →
	Indirect evidence “The Vane Brothers Company has served the maritime industry for more than 125 years, providing a wide range of services that includes ship bunkering and lightering; the delivery of…” Source: RevenueBase Database · checked Sep 20, 2026
15	Canal Barge Company	Indirect evidence	New Orleans, LA, United StatesHQ checked Sep 20, 2026	501-1,000	320 contacts →
	Indirect evidence “Founded in 1933, Canal Barge Company, Inc.” Source: RevenueBase Database · checked Sep 20, 2026
16	Resolve Marine	Strong evidence	Fort Lauderdale, FL, United StatesHQ checked Sep 20, 2026	51-200	277 contacts →
	Strong evidence “Resolve Marine, a global leader in vessel salvage, emergency response, compliance and specialized marine services, has served and supported clients and projects for 40 years.” Source: RevenueBase Database · checked Sep 20, 2026
17	Rocktree	Indirect evidence	Stamford, CT, United StatesHQ checked Sep 20, 2026	1,001-5,000	267 contacts →
	Indirect evidence “Rocktree is a leading infrastructure and logistics service provider with over 1,500 employees in 13 offices worldwide.” Source: RevenueBase Database · checked Sep 20, 2026
18	J.F. Brennan Company	Indirect evidence	La Crosse, WI, United StatesHQ checked Sep 20, 2026	501-1,000	241 contacts →
	Indirect evidence “At Brennan, our people are our top priority.” Source: RevenueBase Database · checked Sep 20, 2026
19	Exmar Offshore Company	Partial evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	51-200	226 contacts →
	Partial evidence “Exmar Offshore Group Houston is the American branch of Exmar (Euronext: EXM), a descendant of the Compagnie Maritime Belge (Euronext: CMB) maritime group founded in 1895 in…” Source: RevenueBase Database · checked Sep 20, 2026
20	Curtin Maritime, Corp	Indirect evidence	Long Beach, CA, United StatesHQ checked Sep 20, 2026	201-500	178 contacts →
	Indirect evidence “Curtin Maritime is an American-owned and operated marine solutions company, committed to innovation, efficiency, and integrity across every element of maritime operations.” Source: RevenueBase Database · checked Sep 20, 2026
21	Subsea Global Solutions	Indirect evidence	Miami, FL, United StatesHQ checked Sep 20, 2026	201-500	176 contacts →
	Indirect evidence “Welcome to Subsea Global Solutions where EVERY DAY our goal is to deliver unrivaled service.” Source: RevenueBase Database · checked Sep 20, 2026
22	Aqueos Corporation	Indirect evidence	Broussard, LA, United StatesHQ checked Sep 20, 2026	201-500	175 contacts →
	Indirect evidence “Aqueos is a 'World Class Subsea Service Provider℠' with our core values being a commitment to “excellence” and our dedication to an “accident-free” workplace.” Source: RevenueBase Database · checked Sep 20, 2026
23	HMM America	Partial evidence	Irving, TX, United StatesHQ checked Sep 20, 2026	1,001-5,000	171 contacts →
	Partial evidence “Hyundai Merchant Marine (HMM) is a leading global shipping company operating over 130 state-of-the-art vessels encompassing more than 50 sea routes to over 100 ports of call.” Source: RevenueBase Database · checked Sep 20, 2026
24	Phoenix International Holdings, INC	Indirect evidence	Largo, United StatesHQ checked Sep 20, 2026	201-500	170 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
25	Otto Candies, LLC	Strong evidence	Des Allemands, LA, United StatesHQ checked Sep 20, 2026	201-500	158 contacts →
	Strong evidence “Otto Candies, LLC is a maritime transportation and support service company specializing in regional, national, and international operations in support of the offshore energy…” Source: RevenueBase Database · checked Sep 20, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: offshore support vessel operators. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names offshore support vessel operators.
Partial evidence: Its own public description names part of offshore support vessel operators, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name offshore support vessel operators. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 454 offshore support vessel operators based in the United States

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Offshore support vessel operators based in the United States at a glance

As of Sep 20, 2026

19.6%Verified-email coverage

89.1Average contacts per company

11-50Median size (employees)

15.4%Largest-city concentration · Houston

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

166

11-50

130

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 454 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among offshore support vessel operators, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “offshore support vessel operators”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names offshore support vessel operators), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among offshore support vessel operators, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 7,927 across the full list. 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 September 20, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Offshore support vessel operators by metro

Offshore support vessel operators in Houston70

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names offshore support vessel operators, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many offshore support vessel operators are there based in the United States?

RevenueBase identified 454 offshore support vessel operators headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Noble Corporation, headquartered in Houston, tops this list with the largest team on record.

Which city has the most offshore support vessel operators?

Houston leads with 70 headquartered companies, followed by Seattle (12) and Miami (9).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 7,927 verified decision-maker contacts tracked across these 454 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 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 Smart Search, 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.