Company lists · Data refreshed October 2026

Top 21 Downstream refining contractors based in Iran

RevenueBase identified 383 company matches for downstream refining contractors associated with Iran as of October 2026 and tracks 13,754 professional contacts across them, including 38 with verified work emails. Tehran is the largest hub.

This list covers company matches for downstream refining contractors associated with Iran, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 11, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Oct 11, 2026 How this list was built
383Companies
13,754Contacts tracked
38Verified emails
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The 21 largest downstream refining contractors based in Iran

Ranked by team size
Top 21 of 383 company matches for downstream refining contractors based in Iran, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 11, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchTehran, IranHQ recorded Oct 11, 20261,001-5,000835 contacts →

Exact match

“Oil Industries’ Commissioning and Operation Company (OICO) is incorporated to manage and execute commissioning and start-up, operation, maintenance and professional training for…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
2Exact matchTehran, IranHQ recorded Oct 11, 20261,001-5,000816 contacts →

Exact match

“Oil Design & Construction Company (ODCC) We are a first grade full-service contractor ranked by the GOI primarily serving the hydrocarbon market with the capability to execute…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
3Exact matchTehran, IranHQ recorded Oct 11, 2026501-1,000451 contacts →

Exact match

“Namvaran Consulting Engineers; Managers founded in 1979 in the era of engineering service industry genesis in Iran, was in fact unfolded from a foreign base - a joint ventured…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
4Exact matchTehran, IranHQ recorded Oct 11, 2026501-1,000352 contacts →

Exact match

“Jahanpars Engineering and Construction Company is a leading, privately-owned general contractor in the Middle East with four decades of successful experience.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
5Exact matchTehran, IranHQ recorded Oct 11, 20261,001-5,000299 contacts →

Exact match

“Aftab Oil Refining (Previously named as MTA Holding) was founded on December 29, 2007.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
6Exact matchTehran, IranHQ recorded Oct 11, 2026501-1,000288 contacts →

Exact match

“NEYRPERSE has been actively involved in designing, procurement, manufacturing, installation and commissioning of the following fields in industry since its establishment in 1958…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
7Exact matchTehran, IranHQ recorded Oct 11, 2026201-500207 contacts →

Exact match

“Enerchimi Engineering Company was established in July 1980 by a group of qualified and experienced executive managers of the National Iranian Oil Company with the objective of…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
8Exact matchTehran, IranHQ recorded Oct 11, 20261,001-5,000192 contacts →

Exact match

“We are proud to present over a half century of our history, beginning with formation of the Ofogh Consulting Engineers Company in 1961.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
9Exact matchTehran, IranHQ recorded Oct 11, 20261,001-5,000184 contacts →

Exact match

“For almost half a century, Asfalt Tous Company has demonstrated its ability to execute major Industrial, Mining, Oil, Gas and Petrochemical Projects directed by expert key…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
10Exact matchTehran, IranHQ recorded Oct 11, 20261,001-5,00086 contacts →

Exact match

“Panah-Sanat-Part has been involved in the implementation of oil industry contracting projects since 2002 and has been continuously involved as a private sector contractor in the…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
11Exact matchTehran, IranHQ recorded Oct 11, 20261,001-5,00086 contacts →

Exact match

“With over 35 years of outstanding performance in industrial projects associated with power, oil, gas, petrochemical and mining, Tanavob General Contractor is a private…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
12Exact matchTehran, IranHQ recorded Oct 11, 20261,001-5,00081 contacts →

Exact match

“The Maroon Karan technical and engineering company was registered in 1992 No.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
13Exact matchTehran, IranHQ recorded Oct 11, 2026501-1,00072 contacts →

Exact match

“Daniel Petro Company has started its activities since 2010 with the aim of conducting study activities and providing technical and engineering services inside and outside of the…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
14Exact matchEsfahan, IranHQ recorded Oct 11, 2026201-50069 contacts →

Exact match

“In effect of the structural changing in “Design and consultant Institute of Steel” the Foolad Technic international engineering company (FIECO) was founded in 1991.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
15Exact matchTehran, IranHQ recorded Oct 11, 202651-20069 contacts →

Exact match

“TABA Service Company established in Jan 2015 as one affiliated TANA Group to follow up Service activities, for implementation of infrastructure projects related to different…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
16Exact matchTehran, IranHQ recorded Oct 11, 2026201-50050 contacts →

Exact match

“SHARGAN was established in 1994 to build an indigenous technological base for design, engineering as well as project management and technical services required by Oil, Gas &…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
17Exact matchAhvaz, IranHQ recorded Oct 11, 202611-5013 contacts →

Exact match

“ASAK Consulting Engineering, established in 2018, provides tailored solutions and expertise that bring significant value to national and international governmental and private…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
18Exact matchTehran, IranHQ recorded Oct 11, 20261,001-5,00012 contacts →

Exact match

“Starting its business in 1994, the Pishgaman Fanandish Co.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
19Exact matchTehran, IranHQ recorded Oct 11, 202611-507 contacts →

Exact match

“Energy Kala Jonoob (EKJ) is an engineering and commercial company specialized in the field of Industrial procurement for Oil, Gas and petrochemical industries as well as other…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
20Exact matchIsfahan, IranHQ recorded Oct 11, 202651-2007 contacts →

Exact match

“Tiran Outreach Petro Paya (TOPPCO)”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
21Exact matchTehran, IranHQ recorded Oct 11, 20261-102 contacts →

Exact match

“At BACKER we've committed ourselves to bring up the very best in all the solutions we create from the overall design to every little detail.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase

Showing 21 of 383 downstream refining contractors based in Iran

See the full list, filter by size, metro and specialty, and access 38 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Downstream refining contractors based in Iran at a glance

As of Oct 11, 2026
0.3%Verified-email coverage
35.9Average contacts per company
51-200Median size (employees)
73.9%Largest-city concentration · Tehran
Oct 11, 2026Page data refreshed

Companies by employee count

1-10
45
11-50
135
51-200
98
201-500
50
501-1,000
22
1,001-5,000
28
5,001-10,000
2
10001+
3

Email recency for this list is measured worldwide rather than for Iran, so it is reported there. Company counts and contact totals on this page are exact for Iran, over 383 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with Iran whose business descriptions match “downstream refining contractors” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 38 professional contacts with verified work emails across the full matched dataset. 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 October 11, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Downstream refining contractors by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “downstream refining contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many downstream refining contractors are there based in Iran?

RevenueBase identified 383 company matches for downstream refining contractors associated with Iran as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

OIL Industries Commissioning And Operation Company Oico tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most downstream refining contractors?

Tehran leads with 283 company records, followed by Isfahan (18) and Shiraz (9).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 38 professional contacts with verified work emails tracked across these 383 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 11, 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 SmartSearch, 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.