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Aksu Çalışkan Beygo Law Partnership

Türkiye

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Key contacts
CEO: Mr. Emrah Aksu
Managing Partner: Mr. Levent Yetkil
Quick facts
Founded in

2001

Number of lawyers

90+ (11 Partners, 1 Of Counsel, and approximately 50 Associates, with nearly 30 Apprentices at any given time)

Main areas of practice

Main areas of practice: Banking & Finance – along with related sub-practices such as Capital Markets, M&A, Projects and Restructuring – and Dispute Resolution

Network memberships

Istanbul Bar Association; Union of Turkish Bar Associations

Languages

Turkish, English, French, German, Russian, Spanish, Turkmen, Persian

Key practice areas
Banking
Project finance
Capital markets
Capital markets : Debt
Capital markets : Equity
Financial and corporate
M&A
Energy and infrastructure
Project development
Project development : Power
Project development : Infrastructure
Firm overview

ASC Law proudly combines one of the most experienced and successful senior leadership teams in Turkey with the next generation superstars. Each of our three Founding Partners – Murat Aksu, Zeki Calişkan and Okan Beygo – have been practicing law over 30 years.

Recognizing, early on, the need for a local firm able to satisfy the growing demands of globalization, our founders’ vision was to bring together, under one roof, lawyers providing legal services meeting, and exceeding, international standards. This goal was quickly achieved, and we now have what we believe is the most sophisticated practices in Turkey.

Key transactional practices
  • Asset finance
  • Banking
  • Capital markets: Debt
  • Capital markets: Derivatives
  • Capital markets: Equity
  • Capital markets: High yield
  • CLO/CDO
  • Covered bonds
  • Financial restructuring
  • Financial services regulatory
  • Investment funds
  • Islamic finance
  • M&A
  • PPP/PFI
  • Private equity
  • Private equity funds
  • Project bonds
  • Project development
  • Project finance
  • Restructuring and insolvency
  • Securitisation
  • Structured finance/securitisation
  • Trade finance
Address:
Esentepe mah. Harman Sk. No:5
Harmanci Giz Plaza Kat 3-8-15-16 Sisli
Istanbul, 34394
Tel:+90-212-284 9882 Fax:+90-212-284 9883 Email:Contact Us Web Address:http://www.aschukuk.com
Rankings published in 2026
Banking
Tier 2
39 firms ranked
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Tier 1

CE Partners in association with Clifford Chance
9 practice areas
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GKC Partners
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Paksoy
13 practice areas
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Tier 2

A&O Shearman Gedik & Eraksoy
12 practice areas
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Aksu Çalışkan Beygo Law Partnership
11 practice areas
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Hergüner Bilgen Üçer Attorney Partnership
13 practice areas
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Çakmak
11 practice areas
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Tier 3

Bezen & Partners
9 practice areas
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Pekin Attorney Partnership
13 practice areas
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Pekin Bayar Mizrahi
11 practice areas
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Tier 4

Akol Law
10 practice areas
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CCAO Law
2 practice areas
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Erdem & Erdem
13 practice areas
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Ergün Avukatlik Bürosu
10 practice areas
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Kolcuoğlu Demirkan Koçaklı
11 practice areas
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Verdi Law Office
6 practice areas
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Özmen Yalçın
11 practice areas
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Özok Law Office
10 practice areas
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Tier 5

Durukan+Partners
11 practice areas
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Egemenoğlu
11 practice areas
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Gen Temizer
9 practice areas
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Tunç Firat Dereli
8 practice areas
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Turunç
12 practice areas
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Özdirekcan Dündar Şenocak AK
3 practice areas
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Notable

Bener Law Office
10 practice areas
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Develioglu & Dag
3 practice areas
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Içtem Legal
6 practice areas
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KECOS
3 practice areas
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KST LAW
7 practice areas
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Kılınç Law & Consulting
9 practice areas
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Okat Law
5 practice areas
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Sadık & Çapan
4 practice areas
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TOCC Attorney Partnership
10 practice areas
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Vardar Şanlı
5 practice areas
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Yazıcı Attorney Partnership
7 practice areas
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Çiğdemtekin Arancı Güneş
11 practice areas
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Capital markets
Tier 4
31 firms ranked
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Tier 1

A&O Shearman Gedik & Eraksoy
12 practice areas
View profile
GKC Partners
13 practice areas
View profile
Paksoy
13 practice areas
View full profile

Tier 2

Akol Law
10 practice areas
View profile
CE Partners in association with Clifford Chance
9 practice areas
View full profile
Pekin Attorney Partnership
13 practice areas
View full profile
Özmen Yalçın
11 practice areas
View full profile

Tier 3

Lexist Law Firm
9 practice areas
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Özok Law Office
10 practice areas
View profile

Tier 4

Aksu Çalışkan Beygo Law Partnership
11 practice areas
View full profile
Erdem & Erdem
13 practice areas
View profile
Gen Temizer
9 practice areas
View full profile
Hergüner Bilgen Üçer Attorney Partnership
13 practice areas
View full profile
Pekin Bayar Mizrahi
11 practice areas
View profile
Çakmak
11 practice areas
View profile

Notable

Durukan+Partners
11 practice areas
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Ergün Avukatlik Bürosu
10 practice areas
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Gokce Attorney Partnership
7 practice areas
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Kolcuoğlu Demirkan Koçaklı
11 practice areas
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Kılınç Law & Consulting
9 practice areas
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Okat Law
5 practice areas
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Penezoglu Law Firm
4 practice areas
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Sadık & Çapan
4 practice areas
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TOCC Attorney Partnership
10 practice areas
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Tunç Firat Dereli
8 practice areas
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Turunç
12 practice areas
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Vardar Şanlı
5 practice areas
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Çiğdemtekin Arancı Güneş
11 practice areas
View profile
M&A
Tier 5
60 firms ranked
View full list

Tier 1

GKC Partners
13 practice areas
View profile
Hergüner Bilgen Üçer Attorney Partnership
13 practice areas
View full profile
Paksoy
13 practice areas
View full profile

Tier 2

Akol Law
10 practice areas
View profile
CE Partners in association with Clifford Chance
9 practice areas
View full profile
Kolcuoğlu Demirkan Koçaklı
11 practice areas
View profile

Tier 3

A&O Shearman Gedik & Eraksoy
12 practice areas
View profile
Bener Law Office
10 practice areas
View full profile
Erdem & Erdem
13 practice areas
View profile
Gen Temizer
9 practice areas
View full profile
Lexist Law Firm
9 practice areas
View profile
Pekin Attorney Partnership
13 practice areas
View full profile
Pekin Bayar Mizrahi
11 practice areas
View profile
Özdirekcan Dündar Şenocak AK
3 practice areas
View profile

Tier 4

AECO – Atayılmaz Enkür Çetinkaya Öner
8 practice areas
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Bezen & Partners
9 practice areas
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Boden Law Office
6 practice areas
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Durukan+Partners
11 practice areas
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Ergün Avukatlik Bürosu
10 practice areas
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Gokce Attorney Partnership
7 practice areas
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Kılınç Law & Consulting
9 practice areas
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Moroğlu Arseven
8 practice areas
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Turunç
12 practice areas
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Verdi Law Office
6 practice areas
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Yazıcı Attorney Partnership
7 practice areas
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Çakmak
11 practice areas
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Özmen Yalçın
11 practice areas
View full profile

Tier 5

Aksu Çalışkan Beygo Law Partnership
11 practice areas
View full profile
Egemenoğlu
11 practice areas
View profile
KECOS
3 practice areas
View profile
Postacıoğlu Law Office
2 practice areas
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Tunç Firat Dereli
8 practice areas
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Çelepçi in cooperation with Schoenherr
9 practice areas
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Çiğdemtekin Arancı Güneş
11 practice areas
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Çukur & Partners Law Firm
12 practice areas
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Özbek Attorney Partnership
6 practice areas
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Notable

Abcoo Law Firm
1 practice area
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Acar & Ergönen Attorney Partnership
2 practice areas
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Aydın Law
4 practice areas
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Baspinar & Partners
3 practice areas
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CCAO Law
2 practice areas
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Cerrahoğlu Law Firm
8 practice areas
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Develioglu & Dag
3 practice areas
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Hansu
4 practice areas
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ITA Legal & Advisory
4 practice areas
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Igniters Tech Law
2 practice areas
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Içtem Legal
6 practice areas
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KP Law
2 practice areas
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KST LAW
7 practice areas
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Koç Attorneys at Law
2 practice areas
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NAZALI
2 practice areas
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Penezoglu Law Firm
4 practice areas
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Sadık & Çapan
4 practice areas
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Solak & Partners
2 practice areas
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Vardar Şanlı
5 practice areas
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Project development
Tier 4
34 firms ranked
View full list

Tier 1

Paksoy
13 practice areas
View full profile
Çakmak
11 practice areas
View profile

Tier 2

Bezen & Partners
9 practice areas
View profile
CE Partners in association with Clifford Chance
9 practice areas
View full profile
GKC Partners
13 practice areas
View profile
Hergüner Bilgen Üçer Attorney Partnership
13 practice areas
View full profile

Tier 3

Boden Law Office
6 practice areas
View profile
Erdem & Erdem
13 practice areas
View profile
Ergün Avukatlik Bürosu
10 practice areas
View profile
Gen Temizer
9 practice areas
View full profile
Tunç Firat Dereli
8 practice areas
View profile
Özmen Yalçın
11 practice areas
View full profile

Tier 4

Akol Law
10 practice areas
View profile
Aksu Çalışkan Beygo Law Partnership
11 practice areas
View full profile
Basan
3 practice areas
View profile
Durukan+Partners
11 practice areas
View profile
Kolcuoğlu Demirkan Koçaklı
11 practice areas
View profile
Lexist Law Firm
9 practice areas
View profile
Yazıcı Attorney Partnership
7 practice areas
View profile
Çiğdemtekin Arancı Güneş
11 practice areas
View profile
Çukur & Partners Law Firm
12 practice areas
View profile

Tier 5

Aydın Law
4 practice areas
View full profile
Hansu
4 practice areas
View full profile
Kılınç Law & Consulting
9 practice areas
View full profile
Pekin Attorney Partnership
13 practice areas
View full profile
Vardar Şanlı
5 practice areas
View profile

Notable

Develioglu & Dag
3 practice areas
View profile
EGE ÇAKIRCA
1 practice area
View profile
ITA Legal & Advisory
4 practice areas
View profile
KST LAW
7 practice areas
View profile
Sayın Law & Consulting
3 practice areas
View profile
Linked Reviews
Financial and corporate

Aksu Çalışkan Beygo Law Partnership (ASC Law) is a full-service Turkish law firm founded in 2001 by Murat Aksu, Zeki Çalışkan and Okan Beygo. The firm is headquartered in Levent /Istanbul. The firm boast of having more than 80 qualified Turkish lawyers with experience in providing legal services to prominent financial institutions and corporations. The firm is very active and well known for its exceptional practice in banking and finance but also has good capabilities in debt and equity capital markets, M&A and project developments.

 

Highlights 

The firm advised TC Ziraat Bankası on its $742 million and €884 million Syndicated Term Loan Facility provided by a consortium of banks with Dhabi Commercial Bank PJSC, Emirates NBD Capital Limited as the joint coordinators, Emirates NBD Capital Limited, Standard Chartered Bank and Sumitomo Mitsui Banking Corporation, London Branch as the ESG Coordinators and Mizuho Bank, Ltd. as the Facility Agent.

 

The firm also advised Altınay Savunma Teknolojileri on its $50 million Initial Public Offering of shares on BIST Stars Market.

 

The firm advised Kalyon Güneş Teknolojileri Üretim on its $4902 million Initial Public Offering of shares on BIST Stars Market.

 

Key clients  

Alcazar Energy Partners, Altınay Savunma Teknolojileri, Osmanlı Yatırım Menkul Değerler, TC Ziraat Bankası, and Türkiye İş Bankası.

 

Testimonials  

“They are very corporate - they answer our questions in a timely manner and provide us with satisfactory and useful information. They are sincere and always support us legally.” – Equity Capital markets Client

“He provides very fast and legally satisfying information. He is always ready to answer our questions and always ready to help us.” - Aras Coşkun

 

(2024/2025)

"ASC Law excels in handling complex projects with precision and efficiency. Their expertise in drafting and negotiating contracts for major aviation and energy projects is exceptional. Their deep legal and technical knowledge, strategic thinking, and attention to detail consistently meet our high standards. The team's versatility and commitment to client needs make them a top choice for this type of work." - Energy Project Development Client

"What we appreciate most about ASC Law is their unparalleled expertise and deep understanding of the energy sector. Their team stands out due to their ability to provide comprehensive and strategic legal guidance, tailored to our specific needs.  ASC Law's approach is highly collaborative, ensuring clear communication and a thorough understanding of our objectives. The team's meticulous attention to detail and proactive problem-solving skills have consistently ensured compliance with intricate energy regulations and industry best practices." - Energy Project Development Client

 

"They are fast, reliable and provide high quality services." - Private Equity Client

 

"They are full knowledge about project finance, very constructive and customer focused." - Project Finance Client

 

“He is highly smart and responsive, listens very well and comes up with highly useful solutions.” - Can Payal

 

“Fulya Sert Topçu is exceptionally responsive and accessible at any time. She consistently provides solution-oriented advice. Her commitment to delivering practical solutions and her extensive knowledge in the field ensure that our transactions are handled with the highest level of professionalism and competence.” - Fulya Sert Topçu

 

“Levent's expertise spans across drafting and negotiating complex agreements, with a particular focus on energy projects, including renewables, hydro plants, and public-private partnerships such as airports and malls. His profound understanding of both legal and technical aspects of these sectors enables him to provide highly specialized advice, ensuring precision and strategic thinking in every project he undertakes.” - Levent Yetkil

 

“Customer focused, well knowledgeable and accessible.” Levent Yetkil

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