Mr Okan Beygo > ASC Law Office > Istanbul, Turkey > Lawyer Profile

ASC Law Office

Work Department

Consultancy Team


Founding Partner


Okan Beygo is a Founding Partner of ASC Law. Okan – along with the firm’s other two Founding Partners, Murat Aksu and Zeki Çalışkan, and Managing Partner Doğan Coşgun – is a key member of the most experienced, and successful, senior law firm leadership teams in Turkey. Okan has practiced law for 35 years and is one of Turkey’s most well-connected lawyers, with extensive networks in Turkey and abroad, as well as being one of ASC Law’s primary rainmakers.

Okan heads the firm’s Consultancy Team, under which the Banking and Finance, Commercial, Corporate, Debt Restructuring, M&A and Capital Markets, and Project Finance practices are found. As such, Okan has played a key role in the firm’s most significant engagements, including the recent Turkcell Shareholding Restructuring, in which ASC Law represented both Ziraat Bank, Turkey’s largest bank, with regard to restructured and original financing of more than US$2 billion, and Turkey’s Sovereign Wealth Fund, the central party to the restructuring itself. CEE Legal Matters recognized this transaction as Turkey’s 2020 “Deal of the Year”.

Okan’s work prior to joining ASC Law, at the global White & Case law firm and inhouse at Citibank, the Turkish Garanti Bank and Doğuş Holding conglomerate, have given him in-depth expertise and know-how in, among others, banking and finance law.

Okan has been recognized by Who’s Who Legal in 2021 as a “Global Leader” in Banking and Finance, Capital Markets and Project Finance.

ASC Law, Founding Partner (2005-Present)
Dogus Holding A.Ş. and Garanti Bank A.Ş. (1998-2004)
Citibank A.Ş. (1997-1998)
White & Case LLP International (1995-1997)


Turkish, English, French


Istanbul Bar


LL.M., University of Geneva, International Law, 1993
LL.M., Marmara University Faculty of Law, International Public Law, 1988
LL.B., Marmara University Faculty of Law, 1986

Lawyer Rankings

Turkey > Commercial, corporate and M&A

At ASC Law Office, the team has ‘a good understanding of the client’s needs and business’. Okan Beygo and senior associate Sıla Öztürk are the key names in the practice, which regularly advises domestic conglomerates, global companies doing business in Turkey, construction, energy and technology companies, as well as government-related entities.

Turkey > Banking, finance and capital markets

Three partners steer the team at ASC Law Office, Okan Beygo and Ela Sarı – both recommended as ‘amazing lawyers‘- and Levent Yetkil, one of the ‘go-to experts’ for ‘renewable power project financings’. The practice, which is praised for being ‘very capable of finding innovative solutions’, covers a wide range of banking, finance and capital markets matters, from traditional bank-to-borrower lending to high-value project and acquisition financing, IPOs, and derivative transactions, and is renowned for its solid debt restructuring offering.

Turkey > Restructuring and insolvency

ASC Law Office‘s practice bring together notable team members, including Okan Beygo and Levent Yetkil, who earn plaudits for their ‘extensive knowledge’. Acting regularly for both borrowers and lenders, the team is regularly involved in significant restructurings and refinancings, of late, advising Ziraat Bank on the Türkcell Shareholding Restructuring. Former partner Denel Balcı left the firm in 2021.