Company lists · Data refreshed September 2026

Top 25 Reinsurance underwriting companies based in Türkiye

RevenueBase identified 72 reinsurance underwriting companies headquartered in Türkiye as of September 2026 and tracks 1,361 professional contacts across them, including 406 with verified work emails. Istanbul is the largest hub.

This list covers reinsurance underwriting companies 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 16, 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 16, 2026 86% judged on-target in blind review
72Companies
1,361Contacts tracked
406Verified emails
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The 25 largest reinsurance underwriting companies based in Türkiye

Ranked by team size
Top 25 of 72 reinsurance underwriting companies based in Türkiye, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to reinsurance underwriting 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceTürkiyeHQ checked Sep 16, 2026201-500154 contacts →

Indirect evidence

“Millî Reasürans T.A.Ş, Türkiye İş Bankası A.Ş.”

Source: RevenueBase Database · checked Sep 16, 2026
2Indirect evidenceIstanbul, TürkiyeHQ checked Sep 16, 2026201-500113 contacts →

Indirect evidence

“Kalite standartlarından ödün vermeyen, inovatif projelerle her zaman ‘’En İyi Hizmet’’ ilkesini benimseyen ÖzserNEO’nun temelleri 1981 yılında şirketin Yönetim Kurulu Başkanı…”

Source: RevenueBase Database · checked Sep 16, 2026
3Indirect evidenceIstanbul, TürkiyeHQ checked Sep 16, 202651-200107 contacts →

Indirect evidence

“NART, carries on business in Risk management world with its 6 service units below.”

Source: RevenueBase Database · checked Sep 16, 2026
4Indirect evidenceSarıyer, TürkiyeHQ checked Sep 16, 202651-20066 contacts →

Indirect evidence

“OYAK GRUP SİGORTA ve Reasürans Brokerliği A.Ş, 2017 yılında OYAK YATIRIM’ın %100 iştiraki olarak kurulmuştur.”

Source: RevenueBase Database · checked Sep 16, 2026
5Partial evidenceİstanbul, TürkiyeHQ checked Sep 16, 202651-20064 contacts →

Partial evidence

“Although the Turkish insurance market has grown significantly in the last ten years, currently there is no locally established international reinsurance company in the market.”

Source: RevenueBase Database · checked Sep 16, 2026
6Indirect evidenceAnkara, TürkiyeHQ checked Sep 16, 202611-5049 contacts →

Indirect evidence

“1989 yılında Bilkent Sigorta Acenteliği adı altında Bilkent Holding iştiraklerine ve çalışanlarına hizmet vermek üzere faaliyete başlayan Bil Sigorta ve Reasürans Brokerliği…”

Source: RevenueBase Database · checked Sep 16, 2026
7Indirect evidenceİstanbul, TürkiyeHQ checked Sep 16, 2026201-50044 contacts →

Indirect evidence

“Telesure Sigorta, global erişim ağı, güçlü sermaye yapısı ve sektörel deneyimi ile kurum ve bireylerin ihtiyaçlarını karşılayan sigorta ve reasürans brokerliğidir.”

Source: RevenueBase Database · checked Sep 16, 2026
8Partial evidenceÇekmeköy, TürkiyeHQ checked Sep 16, 202611-5039 contacts →

Partial evidence

“T-Rupt is an information services company that provides Catastrophe Modelling and Reinsurance solutions.”

Source: RevenueBase Database · checked Sep 16, 2026
9Indirect evidenceIstanbul, TürkiyeHQ checked Sep 16, 2026n/a35 contacts →

Indirect evidence

“ATASIGORTA is one of the leading risk management and insurance agency operating in several countries including Turkey, Russia, Saudi Arabia, Iraq, Azerbeycan, Libya, Algeria…”

Source: RevenueBase Database · checked Sep 16, 2026
10Indirect evidenceİstanbul, TürkiyeHQ checked Sep 16, 202651-20031 contacts →

Indirect evidence

“IMC Sigorta Reasürans Brokerliği, 2013 yılında İstanbul merkezli olarak kurulmuş Türkiye'nin önde gelen sigorta reasürans brokerliği firmalarından biridir.”

Source: RevenueBase Database · checked Sep 16, 2026
11Indirect evidenceŞişli, TürkiyeHQ checked Sep 16, 202651-20030 contacts →

Indirect evidence

“Doğan Sigorta Aracılık Hizmetleri 1981 yılında Ali Doğan tarafından kurulmuştur.”

Source: RevenueBase Database · checked Sep 16, 2026
12Partial evidenceİstanbul, TürkiyeHQ checked Sep 16, 202611-5028 contacts →

Partial evidence

“Established in Istanbul in 2011, Nasco Turkiye is the trade name of Nasco Insurance Group’s insurance and reinsurance broking activities in Turkiye.”

Source: RevenueBase Database · checked Sep 16, 2026
13Indirect evidenceİstanbul, TürkiyeHQ checked Sep 16, 202611-5027 contacts →

Indirect evidence

“Oria, işletmelerin sürekli değişen dünyada karşılaştığı risklerle mücadele etmelerine yardımcı olmak amacıyla kurulmuş bir sigorta ve risk yönetimi şirketidir.”

Source: RevenueBase Database · checked Sep 16, 2026
14Indirect evidenceKadiköy, TürkiyeHQ checked Sep 16, 202651-20027 contacts →

Indirect evidence

“MERCURY, Sigorta Brokerliği, Reasürans Brokerliği, Risk Yönetimi ve Affinity Çözümleri hizmetleri konularında uluslararası hizmet sağlayıcısıdır.”

Source: RevenueBase Database · checked Sep 16, 2026
15Indirect evidenceIstanbul, TürkiyeHQ checked Sep 16, 202611-5021 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 16, 2026
16Indirect evidenceKagithane, TürkiyeHQ checked Sep 16, 202611-5021 contacts →

Indirect evidence

“AtaGlobal is one of the leading risk management advisor and insurance brokers operating in several countries including Turkey, Russia, Saudi Arabia, Iraq, Azerbeycan, Libya…”

Source: RevenueBase Database · checked Sep 16, 2026
17Indirect evidenceIstanbul, TürkiyeHQ checked Sep 16, 202611-5015 contacts →

Indirect evidence

“Biz sigortacıyız, sigortacı bir aileyiz.”

Source: RevenueBase Database · checked Sep 16, 2026
18Indirect evidenceSariyer, TürkiyeHQ checked Sep 16, 202611-5014 contacts →

Indirect evidence

“AB Broker olarak hedeflerinize giden yolda ‘değer verdiğiniz her şey için’ sizinle birlikte yürüyoruz.”

Source: RevenueBase Database · checked Sep 16, 2026
19Indirect evidenceBesiktas / İstanbul, TürkiyeHQ checked Sep 16, 202611-5014 contacts →

Indirect evidence

“Çeyrek asrı aşkın yerel ve küresel tecrübeye sahip sigorta ve reasürans profesyonellerinden oluşan bir ekibiz.”

Source: RevenueBase Database · checked Sep 16, 2026
20Indirect evidenceIstanbul, TürkiyeHQ checked Sep 16, 202611-5013 contacts →

Indirect evidence

“Unibro A.Ş.”

Source: RevenueBase Database · checked Sep 16, 2026
21Indirect evidenceİstanbul, TürkiyeHQ checked Sep 16, 202611-5011 contacts →

Indirect evidence

“IRB Sigorta ve Reasürans Brokerliği A.Ş, 2015 yılında sigortacılık ve reasürans brokerliği faaliyetlerine başlamıştır.”

Source: RevenueBase Database · checked Sep 16, 2026
22Indirect evidenceBeşiktaş/i̇stanbul, TürkiyeHQ checked Sep 16, 202611-5011 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 16, 2026
23Indirect evidenceIstanbul, TürkiyeHQ checked Sep 16, 20261-109 contacts →

Indirect evidence

“SOCAR Broker (SOCAR Sigorta ve Reasürans Brokerliği) was established in 2022 to provide insurance brokerage services to SOCAR Türkiye group companies, SOCAR Global affiliates, and…”

Source: RevenueBase Database · checked Sep 16, 2026
24Indirect evidenceAnkara, TürkiyeHQ checked Sep 16, 202611-509 contacts →

Indirect evidence

“Kurumsal Sigortacılık ve Risk Yönetim Danışmanlığı”

Source: RevenueBase Database · checked Sep 16, 2026
25Indirect evidenceİstanbul, TürkiyeHQ checked Sep 16, 20261-107 contacts →

Indirect evidence

“Vizyonumuz Yurtiçi ve yurtdışı coğrafyalarda yatırımları olan müşterilerimizin hedeflerini gerçekleştirmeleri ve konularında lider olmaları doğrultusunda tüm risklerinin…”

Source: RevenueBase Database · checked Sep 16, 2026

Showing 25 of 72 reinsurance underwriting companies based in Türkiye

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Reinsurance underwriting companies based in Türkiye at a glance

As of Sep 16, 2026
29.8%Verified-email coverage
18.9Average contacts per company
11-50Median size (employees)
48.6%Largest-city concentration · Istanbul
Sep 16, 2026Page data refreshed

Companies by employee count

1-10
27
11-50
32
51-200
8
201-500
4

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 72 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 reinsurance underwriting 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 Türkiye whose own description of what they do matches “reinsurance underwriting 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 reinsurance underwriting 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 reinsurance underwriting companies, 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, 406 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 16, 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.

Reinsurance underwriting companies by metro

  • Reinsurance underwriting companies in Istanbul35

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 reinsurance underwriting 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 reinsurance underwriting companies are there based in Türkiye?

RevenueBase identified 72 reinsurance underwriting companies 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?

Milli Reasürans T.A.Ş, headquartered in Türkiye, tops this list with the largest team on record.

Which city has the most reinsurance underwriting companies?

Istanbul leads with 35 headquartered companies, followed by Ankara (3) and Atasehir (3).

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 406 verified decision-maker contacts tracked across these 72 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 16, 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.