Company lists · Data refreshed September 2026
Top 25 Subsea completion systems manufacturers worldwide
RevenueBase identified 536 subsea completion systems manufacturers worldwide as of September 2026 and tracks 61,334 professional contacts across them, including 16,539 with verified work emails and 0 with mobile numbers. The United States is the largest market and Houston the largest hub.
This list covers subsea completion systems manufacturers worldwide, 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 18, 2026. Country and city lists for subsea completion systems manufacturers follow the table.
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.
The 25 largest subsea completion systems manufacturers worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 12,031 contacts → | ||||
Indirect evidence “Oceaneering is a global technology company delivering engineered services and products and robotic solutions to the offshore energy, defense, aerospace, and manufacturing…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 2 | 6,543 contacts → | ||||
Partial evidence “SLB OneSubsea is the world’s leading subsea technology and solutions provider, focused on accelerating innovation to improve subsea asset performance, while increasing energy…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 3 | 6,466 contacts → | ||||
Indirect evidence “Long recognized for extraordinary performance, superb safety and long-standing partnerships, and now incorporating Frank’s International, Expro is focused on enabling our…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 4 | 4,749 contacts → | ||||
Indirect evidence “FMC Technologies is now TechnipFMC.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 5 | 2,427 contacts → | ||||
Indirect evidence “A OCYAN atua há décadas na prestação de serviços para o setor de óleo e gás upstream, estruturando suas operações em três frentes de atuação.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 6 | 2,215 contacts → | ||||
Indirect evidence “Oil States International, Inc.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 7 | 1,706 contacts → | ||||
Indirect 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 18, 2026Thanks. The Data Team will review it. | |||||
| 8 | 823 contacts → | ||||
Partial evidence “YOUR SINGLE SOURCE FOR SUBSEA SOLUTIONS FROM EQUIPMENT TO EXPERIENCE, C-INNOVATION IS THE SUBSEA SOLUTION C-Innovation (C-I) is an integrated marine services company specializing…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 9 | 712 contacts → | ||||
Partial evidence “With a culture built on high performance and flawless execution, Nine Energy Service is a unique kind of oilfield services company, offering industry-shaping completion solutions…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 10 | 703 contacts → | ||||
Partial evidence “Cactus designs, manufactures, sells and rents a range of highly-engineered wellheads and pressure control equipment.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 11 | 665 contacts → | ||||
Strong evidence “Delta Corporation specializes in the design and manufacture of API-compliant wellhead equipment and pressure control systems for both onshore and offshore oil and gas operations.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 12 | 635 contacts → | ||||
Partial evidence “Worldwide Oilfield Machine (WOM) is a multinational equipment manufacturer specializing in solutions for drilling, testing, production and intervention operations.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 13 | 618 contacts → | ||||
Partial evidence “Unique Group is a leading specialist and integrated engineering solutions provider across the global subsea, renewables, oil and gas, and defence industries.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 14 | 560 contacts → | ||||
Indirect evidence “October 2021.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 15 | 553 contacts → | ||||
Partial evidence “JDR Cable Systems, part of the TFKable Group, is a global leader in providing power and control solutions for the offshore energy market.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 16 | 516 contacts → | ||||
Partial evidence “Boskalis Subsea Services is a world-leading provider of specialist subsea solutions for the offshore energy industry, seamlessly integrating services to deliver optimum results.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 17 | 438 contacts → | ||||
Partial evidence “GR Energy Services is a completion solutions company committed to lowering oil and gas company operational risk and total cost of operations.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 18 | 432 contacts → | ||||
Partial evidence “Summit ESP is a service of Halliburton that provides integrated Electric Submersible Pumping systems to enhance daily well production and total reservoir recovery.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 19 | 340 contacts → | ||||
Partial evidence “Packers Plus is an industry leader in designing and manufacturing lower completions solutions for a variety of technically challenging applications.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 20 | 292 contacts → | ||||
Strong evidence “SMD is an advanced global designer and manufacturer of subsea remotely operated and autonomous power and control solutions.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 21 | 279 contacts → | ||||
Partial evidence “We deliver reliable, high-performance drilling & completion equipment, expert engineering support & responsive service to customers in 100+ countries.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 22 | 259 contacts → | ||||
Partial evidence “Trendsetter is a global provider of specialized subsea solutions to the oil and gas industry's toughest challenges.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 23 | 238 contacts → | ||||
Partial evidence “Dulam International is a leading provider of subsea services to the oil and gas industry in the Middle East and Indian Subcontinent.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 24 | 233 contacts → | ||||
Partial evidence “AKOFS Offshore is a global provider of vessel based subsea well construction and intervention services to the oil and gas industry.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 25 | 212 contacts → | ||||
Partial evidence “A leader in wellhead, pressure control, and production tree (Christmas Tree) equipment and service solutions, Vault PC also supports a top-tier completions division, supporting…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
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: subsea completion systems manufacturers. 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 subsea completion systems manufacturers.
- Partial evidence
- Its own public description names part of subsea completion systems manufacturers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name subsea completion systems manufacturers. 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 536 subsea completion systems manufacturers worldwide
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Subsea completion systems manufacturers worldwide at a glance
As of Sep 18, 2026Companies by employee count
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 subsea completion systems manufacturers, 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.
- Coverage
- 7 countries, largest first: the United States, the United Kingdom, Norway, Canada, India, the United Arab Emirates, Brazil. Country and city lists for subsea completion systems manufacturers are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “subsea completion systems manufacturers”. 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 subsea completion systems manufacturers), 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 subsea completion systems manufacturers, and records with no verified work email.
- 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, 16,539 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 18, 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.
Subsea completion systems manufacturers by location
7 lists · largest firstEvery Subsea completion systems manufacturers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Subsea completion systems manufacturers based in the United States199
- Subsea completion systems manufacturers based in the United Kingdom141
- Subsea completion systems manufacturers based in Norway71
- Subsea completion systems manufacturers based in Canada37
- Subsea completion systems manufacturers based in India33
- Subsea completion systems manufacturers based in the United Arab Emirates29
- Subsea completion systems manufacturers based in Brazil26
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 subsea completion systems manufacturers, 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 subsea completion systems manufacturers are there worldwide?
RevenueBase identified 536 subsea completion systems manufacturers worldwide 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?
Oceaneering, headquartered in Houston, tops this list with the largest team on record.
Which country has the most subsea completion systems manufacturers?
The United States leads with 199 companies, followed by the United Kingdom (141) and Norway (71). Every subsea completion systems manufacturers list by country and city is linked on this page.
Which city has the most subsea completion systems manufacturers?
Houston leads with 80 headquartered companies, followed by Aberdeen (38) and Calgary (21).
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 16,539 verified decision-maker contacts tracked across these 536 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 18, 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.