Company lists · Data refreshed September 2026

Top 14 Oil and gas accounting firms based in Türkiye

RevenueBase identified 120 oil and gas accounting firms headquartered in Türkiye as of September 2026 and tracks 2,371 professional contacts across them, including 63 with verified work emails. Istanbul is the largest hub.

This list covers oil and gas accounting firms headquartered in Türkiye, 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 14, 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 14, 2026 86% judged on-target in blind review
120Companies
2,371Contacts tracked
63Verified emails
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The 14 largest oil and gas accounting firms based in Türkiye

Ranked by team size
Top 14 of 120 oil and gas accounting firms based in Türkiye, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to oil and gas accounting firms: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Strong evidenceBornova, TürkiyeHQ checked Sep 14, 202611-5055 contacts →

Strong evidence

“At A Glance;* Oil & Gas Engineering Company,* Managed by Practicing Refinery Engineers,* Engineering Expertise that Minimizes Cost & Improves Process,* Over 100 Total Project…”

Source: RevenueBase Database · checked Sep 14, 2026
2Indirect evidenceAnkara, TürkiyeHQ checked Sep 14, 202651-20054 contacts →

Indirect evidence

“Vezin Yeminli Mali Müşavirlik A.Ş, uzun yıllar kamudan sonra özel sektörde Yeminli Mali Müşavirlik ve üst düzey yöneticilik yapmış Hesap Uzmanları tarafından kurulmuş olup, şirket…”

Source: RevenueBase Database · checked Sep 14, 2026
3Indirect evidenceİstanbul, TürkiyeHQ checked Sep 14, 202611-5015 contacts →

Indirect evidence

“Optimum Denetim 2011 yılında kurulmuştur.”

Source: RevenueBase Database · checked Sep 14, 2026
4Partial evidenceİstanbul, TürkiyeHQ checked Sep 14, 202611-5014 contacts →

Partial evidence

“DENETIM TURKEY, which has been established for the purposes of the development of the knowledge and application of modern business administration in the areas of Tax, Accounting…”

Source: RevenueBase Database · checked Sep 14, 2026
5Indirect evidenceKonak, TürkiyeHQ checked Sep 14, 202611-5013 contacts →

Indirect evidence

“İZDENETİM deneyimli ve profesyonel bir ekip tarafından kurulmuş olup; • Yeminli mali müşavirlik, • Bağımsız denetim, • Denetim hizmetleri, • Yönetim danışmanlığı, • Mali…”

Source: RevenueBase Database · checked Sep 14, 2026
6Indirect evidenceİzmir, TürkiyeHQ checked Sep 14, 202611-5011 contacts →

Indirect evidence

“40 yılın üzerindeki tecrübesi beraberinde mali müşavirlik, muhasebe ve denetim hizmetleri konusunda faaliyet göstermekteyiz.”

Source: RevenueBase Database · checked Sep 14, 2026
7Indirect evidenceIstanbul, TürkiyeHQ checked Sep 14, 202611-509 contacts →

Indirect evidence

“Kapsam YMM,1995 yılından bu yana tecrübeli uzman kadrosuyla Mali Müşavirlik, İç Denetim, Vergi Denetim, Planlama, Danışmanlığı hizmetleri vermektedir.”

Source: RevenueBase Database · checked Sep 14, 2026
8Indirect evidenceKonak, TürkiyeHQ checked Sep 14, 202611-508 contacts →

Indirect evidence

“Mali danışman seçimine vereceğiniz önem; en az yeni yatırım alanları için vereceğiniz kararlar kadar önemlidir.” Ülkemizin sürekli içinde olduğu ekonomik, politik ve sosyal…”

Source: RevenueBase Database · checked Sep 14, 2026
9Indirect evidenceIstanbul, TürkiyeHQ checked Sep 14, 202611-507 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 14, 2026
10Indirect evidenceİstanbul, TürkiyeHQ checked Sep 14, 202611-507 contacts →

Indirect evidence

“Ofisimiz farklı ve kaliteli hizmet sunarak, müşteri memnuniyetini en yüksek düzeyde tutma anlayışıyla hareket eder.”

Source: RevenueBase Database · checked Sep 14, 2026
11Indirect evidenceKocaeli̇, TürkiyeHQ checked Sep 14, 202611-506 contacts →

Indirect evidence

“Ülkemizin giderek gelişen ekonomisinde kendinize yer bulmak için çabalarken, şirketinizin değerlerini ölçme ve yönetme konusunda sizinle birlikte, aynı vizyona koşacak çözüm…”

Source: RevenueBase Database · checked Sep 14, 2026
12Indirect evidenceBuyukcekmece, TürkiyeHQ checked Sep 14, 202611-506 contacts →

Indirect evidence

“Vergi Denetimi Denetim Finansal Danışmanlık Finansal Hizmetler”

Source: RevenueBase Database · checked Sep 14, 2026
13Indirect evidenceSahrayıcedit, TürkiyeHQ checked Sep 14, 20261-103 contacts →

Indirect evidence

“SoHo Serbest Muhasebeci Mali Müsavirlik Limited Sirketi (SoHo Independent Accountancy and Financial Advisory Limited Company) has been established by Certified Public Accountant…”

Source: RevenueBase Database · checked Sep 14, 2026
14Indirect evidenceAtasehir, TürkiyeHQ checked Sep 14, 20261-101 contacts →

Indirect evidence

“Demir Denetim ve A.Ş.| Güvenilir Mali Çözümler, Sürdürülebilir Başarı 2011 yılında kurulan Demir Denetim ve A.Ş, mali müşavirlik, finansal danışmanlık alanlarında uzmanlaşmış bir…”

Source: RevenueBase Database · checked Sep 14, 2026

Showing 14 of 120 oil and gas accounting firms based in Türkiye

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Oil and gas accounting firms based in Türkiye at a glance

As of Sep 14, 2026
2.7%Verified-email coverage
19.8Average contacts per company
1-10Median size (employees)
30.8%Largest-city concentration · Istanbul
Sep 14, 2026Page data refreshed

Companies by employee count

1-10
72
11-50
42
51-200
5
201-500
1

Email recency for this list is measured worldwide rather than for Türkiye, so it is reported there. Company counts and contact totals on this page are exact for Türkiye, over 120 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 oil and gas accounting firms, 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 Türkiye whose own description of what they do matches “oil and gas accounting firms”. 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 oil and gas accounting firms), 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 oil and gas accounting firms, and records with no verified work email. Companies headquartered outside Türkiye 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, 63 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 14, 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.

Oil and gas accounting firms by metro

  • Oil and gas accounting firms in Istanbul37

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 oil and gas accounting firms, 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 oil and gas accounting firms are there based in Türkiye?

RevenueBase identified 120 oil and gas accounting firms headquartered in Türkiye 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?

Koryon Engineering & Consultancy, headquartered in Bornova, tops this list with the largest team on record.

Which city has the most oil and gas accounting firms?

Istanbul leads with 37 headquartered companies, followed by Ankara (13) and Izmir (6).

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 63 verified decision-maker contacts tracked across these 120 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 14, 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.