Company lists · Data refreshed September 2026
Top 25 Api 650 tank contractors based in the United States
RevenueBase identified 364 api 650 tank contractors headquartered in the United States as of September 2026 and tracks 9,180 professional contacts across them, including 3,143 with verified work emails. Houston is the largest hub.
This list covers api 650 tank contractors 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 30, 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.
The 25 largest api 650 tank contractors based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 704 contacts → | ||||
Partial evidence “HMT is the global leader in aboveground storage tank solutions.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 2 | 432 contacts → | ||||
Indirect evidence “CST Industries, Inc.(CST™), is the complete storage system provider for engineering and manufacturing professionals in thousands of different industries and applications…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 3 | 361 contacts → | ||||
Indirect evidence “For over 50 years, Landmark has been a leading provider of engineering, construction, and asset management services for storage solutions in the water, wastewater, power, and…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 4 | 226 contacts → | ||||
Indirect evidence “With 60+ years in business, TT-FSS is recognized domestically and internationally as being a certified and qualified shop specializing in fast-track, on time, on-budget…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 5 | 197 contacts → | ||||
Partial evidence “DCI, Inc, an employee-owned company, is a world leader in the manufacturing and servicing of both factory and field-fabricated stainless steel storage tanks and processing tanks.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 6 | 188 contacts → | ||||
Indirect evidence “Great Basin Industrial (GBI) delivers turnkey industrial Fabrication, Construction and Maintenance.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 7 | 187 contacts → | ||||
Indirect evidence “For 80 years, Oscar W.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 8 | 176 contacts → | ||||
Partial evidence “AT TANK CONNECTION, WE ENGINEER EXCELLENCE Tank Connection is the leading bolted tank manufacturer for factory coated bolted storage tanks and aluminum geodesic dome covers for…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 9 | 173 contacts → | ||||
Partial evidence “Caldwell has constructed a wide variety of tanks for all kinds of applications throughout North America, Beyond the building phase, we offer services for the rehabilitation of…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 10 | 130 contacts → | ||||
Indirect evidence “McCarl’s LLC is an American success story of unflinching dedication to the enduring values that have kept us at the forefront of the industrial contracting industry for over 78…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 11 | 124 contacts → | ||||
Strong evidence “TANCO Engineering specializes in new above ground tank construction designed to AWWA, API 650, API 620, UL, and other applicable construction codes and Tank Repairs/Modifications…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 12 | 121 contacts → | ||||
Indirect evidence “PermianLide is the largest U.S.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 13 | 118 contacts → | ||||
Strong evidence “Petrosmith builds ASME and API certified tanks, vessels, and modular systems - custom-made to fit your specs and built to perform.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 14 | 117 contacts → | ||||
Partial evidence “Modern Welding Company, is the largest underground and aboveground steel tank manufacturer in the United States.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 15 | 115 contacts → | ||||
Indirect evidence “Founded in 1966, Central Maintenance and Welding, Inc.(CMW) provides plant maintenance, plant turnaround, construction and fabrication services for chemical processing, mining…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 16 | 110 contacts → | ||||
Partial evidence “Tank Services is an aboveground storage tank company in Texas.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 17 | 108 contacts → | ||||
Strong evidence “ATEC specializes in the design, fabrication, construction of welded above ground storage tank's per API 650/620 and AWWA D100 standards and specifications.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 18 | 107 contacts → | ||||
Partial evidence “Preload is the world's leader in prestressed concrete tank design and construction, having completed more than 3,700 tanks of various types, sizes and designs.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 19 | 106 contacts → | ||||
Partial evidence “Tarsco has served industrial clients over 40 years specializing in engineering, manufacturing, and construction of customized, aboveground welded storage tank systems.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 20 | 101 contacts → | ||||
Partial evidence “Mechanical Contractor serving the needs of the Nation’s leading Petrochemical Companies.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 21 | 99 contacts → | ||||
Partial evidence “Since 1946, Highland Tank has been upholding a tradition of uncompromising craftsmanship and a commitment to providing solutions to even the most challenging storage tank projects…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 22 | 98 contacts → | ||||
Partial evidence “Advance Tank and Construction is a nationwide company that specializes in the design, fabrication, and erection of above-ground welded steel storage tanks.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 23 | 98 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 24 | 96 contacts → | ||||
Partial evidence “Fisher Tank Company builds field erected welded steel tanks.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 25 | 96 contacts → | ||||
Indirect evidence “Family owned and operated since 1919, in 2021 we became 100% employee owned!” Source: RevenueBase Database · checked Sep 30, 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: api 650 tank contractors. 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 api 650 tank contractors.
- Partial evidence
- Its own public description names part of api 650 tank contractors, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name api 650 tank contractors. 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 364 api 650 tank contractors based in the United States
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Api 650 tank contractors based in the United States at a glance
As of Sep 30, 2026Companies by employee count
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 364 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 api 650 tank contractors, 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 “api 650 tank contractors”. 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 api 650 tank contractors), 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 api 650 tank contractors, 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, 3,143 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 30, 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 api 650 tank contractors, 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 api 650 tank contractors are there based in the United States?
RevenueBase identified 364 api 650 tank contractors 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?
HMT LLC, headquartered in The Woodlands, tops this list with the largest team on record.
Which city has the most api 650 tank contractors?
Houston leads with 10 headquartered companies, followed by Springfield (5) and Cincinnati (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 3,143 verified decision-maker contacts tracked across these 364 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 30, 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.
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