Company lists · Data refreshed September 2026

Top 25 Renewable energy offshore developers based in the United States

Name: Renewable energy offshore developers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 168 companies tracked

RevenueBase identified 168 renewable energy offshore developers headquartered in the United States as of September 2026 and tracks 8,719 professional contacts across them, including 2,487 with verified work emails. Houston is the largest hub.

This list covers renewable energy offshore developers 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 17, 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 17, 2026 86% judged on-target in blind review

168Companies

8,719Contacts tracked

2,487Verified emails

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The 25 largest renewable energy offshore developers based in the United States

Ranked by team size

Top 25 of 168 renewable energy offshore developers based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to renewable energy offshore developers: 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	FTI	Strong evidence	Menasha, WI, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,741 contacts →
	Strong evidence “Faith Technologies Incorporated (FTI) is a dynamic organization comprised of construction, engineering, manufacturing and renewable energy experts.” Source: RevenueBase Database · checked Sep 17, 2026
2	Helix Energy Solutions Group	Strong evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,706 contacts →
	Strong 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 17, 2026
3	Baywa R.E. Americas	Strong evidence	Carlsbad, CA, United StatesHQ checked Sep 17, 2026	201-500	244 contacts →
	Strong evidence “rethinkenergy BayWa r.e is a leading global renewable energy company committed to delivering best-in-class projects, services and solutions.” Source: RevenueBase Database · checked Sep 17, 2026
4	Seatrium Amfels, INC	Strong evidence	Brownsville, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	229 contacts →
	Strong evidence “Seatrium AmFELS is an industry pioneer committed to sustainability by providing cleaner offshore & marine solutions, offshore renewables, and new energy, generating long-term…” Source: RevenueBase Database · checked Sep 17, 2026
5	Zentech Incorporated	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	51-200	181 contacts →
	Indirect evidence “Zentech, Inc, an engineering consulting and software development company, headquartered in Houston, TX, is comprised of experienced professionals specializing in providing…” Source: RevenueBase Database · checked Sep 17, 2026
6	Vineyard Wind	Strong evidence	New Bedford, MA, United StatesHQ checked Sep 17, 2026	51-200	98 contacts →
	Strong evidence “Vineyard Wind is well underway in developing the nation's first utility-scale offshore wind energy project over 15 miles off the coast of Massachusetts.” Source: RevenueBase Database · checked Sep 17, 2026
7	Principle Power	Indirect evidence	Emeryville, CA, United StatesHQ checked Sep 17, 2026	51-200	95 contacts →
	Indirect evidence “Principle Power is a global leader in floating wind technology, providing full lifecycle engineering services that deliver reliable, de-risked, and bankable solutions.” Source: RevenueBase Database · checked Sep 17, 2026
8	Panthalassa	Strong evidence	Portland, OR, United StatesHQ checked Sep 17, 2026	51-200	91 contacts →
	Strong evidence “The open ocean is Earth’s largest and most power-dense renewable energy resource.” Source: RevenueBase Database · checked Sep 17, 2026
9	Vineyard Offshore	Partial evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	51-200	60 contacts →
	Partial evidence “We envision a future powered by offshore wind-built for communities and shared success.” Source: RevenueBase Database · checked Sep 17, 2026
10	Koil Energy	Strong evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	51-200	57 contacts →
	Strong evidence “Koil Energy is a leading energy services company offering subsea equipment and support services to the world’s energy and offshore industries.” Source: RevenueBase Database · checked Sep 17, 2026
11	ORPC	Partial evidence	Portland, ME, United StatesHQ checked Sep 17, 2026	11-50	57 contacts →
	Partial evidence “Proven and reliable underwater power systems that generate energy from free-flowing tides and rivers, ORPC improves people’s lives and their environment through sustainable energy…” Source: RevenueBase Database · checked Sep 17, 2026
12	IOWN	Strong evidence	La Jolla, CA, United StatesHQ checked Sep 17, 2026	51-200	55 contacts →
	Strong evidence “We want to facilitate the transition from fossil fuels to clean, renewable energy.” Source: RevenueBase Database · checked Sep 17, 2026
13	Atlantic Shores Offshore Wind	Partial evidence	Atlantic City, NJ, United StatesHQ checked Sep 17, 2026	201-500	51 contacts →
	Partial evidence “Transparency, accountability, and reliability - that’s what Atlantic Shores envisions for the future of offshore wind.” Source: RevenueBase Database · checked Sep 17, 2026
14	Makai Ocean Engineering, INC	Indirect evidence	Waimanalo, HI, United StatesHQ checked Sep 17, 2026	11-50	46 contacts →
	Indirect evidence “Makai Ocean Engineering was founded in 1973 as a diversified ocean engineering company focused on providing design engineering and development services to a broad range of…” Source: RevenueBase Database · checked Sep 17, 2026
15	Oceantic Network	Partial evidence	Owings Mills, MD, United StatesHQ checked Sep 17, 2026	11-50	45 contacts →
	Partial evidence “The Oceantic Network provides networking, communications, and educational platforms to support stakeholders' participation in the offshore wind and the wider ocean tech industries…” Source: RevenueBase Database · checked Sep 17, 2026
16	Ocergy	Partial evidence	Oakland, CA, United StatesHQ checked Sep 17, 2026	11-50	41 contacts →
	Partial evidence “Ocergy is an innovative company focusing on the development of complex ocean systems solving energy and environmental challenges in a sustainable manner.” Source: RevenueBase Database · checked Sep 17, 2026
17	Oriden	Strong evidence	Pittsburgh, PA, United StatesHQ checked Sep 17, 2026	11-50	30 contacts →
	Strong evidence “Oriden is a full-service renewable energy developer.” Source: RevenueBase Database · checked Sep 17, 2026
18	C-Power	Partial evidence	Charlottesville, VA, United StatesHQ checked Sep 17, 2026	11-50	25 contacts →
	Partial evidence “C-Power™ is an ocean power company, tapping the world’s largest battery, our oceans, to supply cost-effective, dependable, and predictable energy generation systems for our…” Source: RevenueBase Database · checked Sep 17, 2026
19	Pearce Renewables	Strong evidence	Paso Robles, CA, United StatesHQ checked Sep 17, 2026	1,001-5,000	23 contacts →
	Strong evidence “Pearce Renewables, a leading solutions provider for operations, maintenance and engineering services to our nation’s mission-critical renewable energy infrastructure, helps…” Source: RevenueBase Database · checked Sep 17, 2026
20	Windserve Marine	Indirect evidence	U.s. East Coast, United StatesHQ checked Sep 17, 2026	51-200	22 contacts →
	Indirect evidence “WindServe Marine is a premier U.S.” Source: RevenueBase Database · checked Sep 17, 2026
21	Community Offshore Wind	Strong evidence	New York, United StatesHQ checked Sep 17, 2026	51-200	19 contacts →
	Strong evidence “Community Offshore Wind is an offshore wind joint venture of RWE and National Grid, committed to Local Clean Energy for All™.” Source: RevenueBase Database · checked Sep 17, 2026
22	US Wind, INC	Strong evidence	Baltimore, MD, United StatesHQ checked Sep 17, 2026	11-50	17 contacts →
	Strong evidence “Developer of the largest offshore wind facility to serve the people of Maryland.” Source: RevenueBase Database · checked Sep 17, 2026
23	Edelen Renewables	Strong evidence	Lexington, KY, United StatesHQ checked Sep 17, 2026	11-50	16 contacts →
	Strong evidence “From Appalachia to the Permian Basin, we are bringing the promise of renewable energy to the forgotten places, where coalminers and oil and gas workers powered the industrial…” Source: RevenueBase Database · checked Sep 17, 2026
24	Kelson Marine CO	Partial evidence	Portland, ME, United StatesHQ checked Sep 17, 2026	1-10	16 contacts →
	Partial evidence “Kelson Marine is an ocean engineering firm that partners with its clients to solve the challenges of producing food and energy in the harsh world of the ocean.” Source: RevenueBase Database · checked Sep 17, 2026
25	Empire Energy	Strong evidence	New York, NY, United StatesHQ checked Sep 17, 2026	51-200	14 contacts →
	Strong evidence “Empire Energy is redefining how offshore wind projects are delivered globally, setting a new benchmark for quality, assurance, and operational excellence across the full asset…” Source: RevenueBase Database · checked Sep 17, 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: renewable energy offshore developers. 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 renewable energy offshore developers.
Partial evidence: Its own public description names part of renewable energy offshore developers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name renewable energy offshore developers. 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 168 renewable energy offshore developers based in the United States

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Renewable energy offshore developers based in the United States at a glance

As of Sep 17, 2026

28.5%Verified-email coverage

51.9Average contacts per company

1-10Median size (employees)

13.1%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 168 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 renewable energy offshore developers, 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 “renewable energy offshore developers”. 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 renewable energy offshore developers), 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 renewable energy offshore developers, 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, 2,487 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 17, 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.

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 renewable energy offshore developers, 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 renewable energy offshore developers are there based in the United States?

RevenueBase identified 168 renewable energy offshore developers 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?

FTI, headquartered in Menasha, tops this list with the largest team on record.

Which city has the most renewable energy offshore developers?

Houston leads with 22 headquartered companies, followed by New York (8) and Boston (7).

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 2,487 verified decision-maker contacts tracked across these 168 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 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 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.