Company lists · Data refreshed September 2026

Top 25 Marine renewable energy companies based in the United States

Name: Marine renewable energy companies 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 127 companies tracked

RevenueBase identified 127 marine renewable energy companies headquartered in the United States as of September 2026 and tracks 2,364 professional contacts across them, including 555 with verified work emails. Houston is the largest hub.

This list covers marine renewable energy companies 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

127Companies

2,364Contacts tracked

555Verified emails

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The 25 largest marine renewable energy companies based in the United States

Ranked by team size

Top 25 of 127 marine renewable energy companies 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 marine renewable energy companies: 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	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
2	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
3	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
4	Vineyard Offshore	Indirect evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	51-200	60 contacts →
	Indirect evidence “We envision a future powered by offshore wind-built for communities and shared success.” Source: RevenueBase Database · checked Sep 17, 2026
5	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
6	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
7	National Hydropower Association	Strong evidence	Washington, DC, United StatesHQ checked Sep 17, 2026	11-50	34 contacts →
	Strong evidence “The National Hydropower Association (NHA) is a nonprofit association dedicated exclusively to promoting the growth of clean, renewable hydropower and marine energy.” Source: RevenueBase Database · checked Sep 17, 2026
8	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
9	Nline Energy, INC	Indirect evidence	Bend, OR, United StatesHQ checked Sep 17, 2026	11-50	22 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
10	Verterra Energy	Partial evidence	New Brighton, MN, United StatesHQ checked Sep 17, 2026	11-50	18 contacts →
	Partial evidence “Verterra Energy is reimagining how to harness the power of flowing water on our planet.” Source: RevenueBase Database · checked Sep 17, 2026
11	US Wind, INC	Indirect evidence	Baltimore, MD, United StatesHQ checked Sep 17, 2026	11-50	17 contacts →
	Indirect evidence “Developer of the largest offshore wind facility to serve the people of Maryland.” Source: RevenueBase Database · checked Sep 17, 2026
12	GENH	Indirect evidence	Somerville, MA, United StatesHQ checked Sep 17, 2026	1-10	15 contacts →
	Indirect evidence “GenH is a hydroelectric technology development company focused on advanced modular power generation.” Source: RevenueBase Database · checked Sep 17, 2026
13	Coevo Energy	Partial evidence	New York, NY, United StatesHQ checked Sep 17, 2026	11-50	15 contacts →
	Partial evidence “Coevo Energy, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
14	Xceco LTD	Partial evidence	Grimsby, United StatesHQ checked Sep 17, 2026	11-50	12 contacts →
	Partial evidence “Providing operations, asset management, engineering and commercial services to the energy industry.” Source: RevenueBase Database · checked Sep 17, 2026
15	Littoral Power Systems, INC	Partial evidence	New Bedford, MA, United StatesHQ checked Sep 17, 2026	11-50	12 contacts →
	Partial evidence “LPS addresses the problems of cost, environmental impact, and regulatory complexity in hydropower and ocean energy.” Source: RevenueBase Database · checked Sep 17, 2026
16	Verdant Power, INC	Partial evidence	New York, NY, United StatesHQ checked Sep 17, 2026	11-50	12 contacts →
	Partial evidence “Verdant Power is at the forefront of advancing the global tidal energy industry to make tidal energy technology available worldwide.” Source: RevenueBase Database · checked Sep 17, 2026
17	Oscilla Power, INC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	1-10	11 contacts →
	Indirect evidence “Oscilla Power, Inc.(OPI) is developing advanced technology to harness electricity from ocean waves.” Source: RevenueBase Database · checked Sep 17, 2026
18	BGB Renewables LLC	Partial evidence	Providence, RI, United StatesHQ checked Sep 17, 2026	51-200	11 contacts →
	Partial evidence “BGB Renewables are driving the winds of change in the onshore and offshore Industry by working in collaboration and striving to continually invest in processes, technology and…” Source: RevenueBase Database · checked Sep 17, 2026
19	Ocean Thermal Energy Corporation	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 17, 2026	11-50	11 contacts →
	Partial evidence “Ocean Thermal Energy (OTE) Corporation is a leader in designing and developing secure ocean-based power plants.” Source: RevenueBase Database · checked Sep 17, 2026
20	Deep Reach Technology, INC	Strong evidence	Stafford, TX, United StatesHQ checked Sep 17, 2026	11-50	10 contacts →
	Strong evidence “Deep Reach Technology, Inc.(DRT) the leading specialist in marine engineering focused on renewable energy and marine mineral harvesting.” Source: RevenueBase Database · checked Sep 17, 2026
21	GEO Subsea LLC	Partial evidence	Middletown, CT, United StatesHQ checked Sep 17, 2026	1-10	10 contacts →
	Partial evidence “Geo SubSea is a unique small business serving the marine offshore and survey industries with expertise in marine geology and geophysics as well as strong familiarity with all…” Source: RevenueBase Database · checked Sep 17, 2026
22	Dolphin Labs Ocean	Indirect evidence	Oakland, CA, United StatesHQ checked Sep 17, 2026	1-10	10 contacts →
	Indirect evidence “Our vision is to unlock power and data offshore with IOT technology, powered by waves.” Source: RevenueBase Database · checked Sep 17, 2026
23	Calwave INC	Indirect evidence	Oakland, CA, United StatesHQ checked Sep 17, 2026	1-10	10 contacts →
	Indirect evidence “CalWave is bringing superior power generating technology to market with global reach.” Source: RevenueBase Database · checked Sep 17, 2026
24	Ocean Motion Technologies	Partial evidence	San Diego, CA, United StatesHQ checked Sep 17, 2026	11-50	10 contacts →
	Partial evidence “Ocean Motion Technologies develops innovative small-scale ocean wave energy devices that are controlled by advanced artificial intelligence systems.” Source: RevenueBase Database · checked Sep 17, 2026
25	Hazelett Marine	Partial evidence	South Burlington, VT, United StatesHQ checked Sep 17, 2026	11-50	10 contacts →
	Partial evidence “HAZELETT MARINE is the global leader in the design, manufacturing, and installation of the strongest Mooring Systems for marinas, swing moorings, floating solar, and floating…” 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: marine renewable energy companies. 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 marine renewable energy companies.
Partial evidence: Its own public description names part of marine renewable energy companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name marine renewable energy companies. 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 127 marine renewable energy companies based in the United States

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Marine renewable energy companies based in the United States at a glance

As of Sep 17, 2026

23.5%Verified-email coverage

18.6Average contacts per company

1-10Median size (employees)

8.7%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 127 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 marine renewable energy companies, 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 “marine renewable energy companies”. 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 marine renewable energy companies), 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 marine renewable energy companies, 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, 555 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 marine renewable energy companies, 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 marine renewable energy companies are there based in the United States?

RevenueBase identified 127 marine renewable energy companies 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?

Seatrium Amfels, INC, headquartered in Brownsville, tops this list with the largest team on record.

Which city has the most marine renewable energy companies?

Houston leads with 11 headquartered companies, followed by New York (5) and Boston (4).

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 555 verified decision-maker contacts tracked across these 127 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.