Firm Profile > Gün + Partners > Istanbul, Turkey

Gün + Partners

Compliance Tier 1

Gün + Partners acts for a varied client base composed of domestic and multinational businesses and state entities in areas including pharmaceuticals, healthcare, engineering, tech, and financial services. The team has expertise in conducting internal investigations and defending against prosecutions relating to white-collar crime and fraud, whistleblower accusations, and competition-related claims. Contacts in the team include Bariş Kalayci, who focuses on business crime and anti-corruption cases, handling civil, commercial, and criminal litigation, and newly-promoted partner Filiz Toprak Esin, who works with clients on white-collar crime, business ethics, and competition issues. Pelin Baysal left the firm.

Practice head(s):

Barış Kalaycı; Filiz Toprak Esin


‘They are corporate law firm with an international and national vision. Accountability, objectivity, and transparency are recognized as its most important features.’

Dispute resolution Tier 1

Gün + Partners handles high-profile disputes on behalf of notable domestic and international entities. Of late, the team represented major clients in disputes relating to distribution agreements, IP litigation and contract breaches due to the COVID-19 pandemic. It has also been engaged in several ICC arbitration cases during 2020. The practice group is led by experienced senior partner and arbitrator Mehmet Gün and newly-promoted partner Filiz Toprak Esin. Pelin Baysal left the firm.

Practice head(s):

Mehmet Gün; Filiz Toprak Esin


‘G+P are a highly experienced and trustworthy disputes practice and take a very diligent approach to advising on Turkish law issues and explaining and reporting on Turkish litigation. They have lawyers with a number of specialities and take a rigorous professional approach to advising clients. In terms of service, they are always responsive and make great efforts to ensure they are available either but written advice and reporting which is of a good quality or on the phone. The quality applies to the partners and the associates who are also very competent and have good client skills. ’

‘Mehmet Gun is a highly experienced senior partner and has a presence that commands instant respect.’

Employment Tier 1

Gün + Partners combines day-to-day Turkish employment advice with strong capabilities regarding redundancies and executive dismissals, employment litigation including reinstatement proceedings, internal investigations and regulatory compliance, and employee data privacy protection. The firm has been active in supporting clients with COVID-related restructurings and cost-cutting measures, including associated legal challenges. The team is now led by managing associate Beril Yayla Sapan following the departure of Rıza Gümbüşoğlu, with senior associate Asena Aytuğ Keser also a key member of the practice. All senior lawyers advise a range of prominent international clients. Pelin Baysal left the firm.

Practice head(s):

Beril Yayla Sapan

Other key lawyers:

Asena Aytuğ Keser

Insurance Tier 1

Gün + Partners is heavily active in the insurance sector, advising a variety of international insurance and banking clients on insurance and reinsurance, M&A and corporate issues, and in high-value disputes relating to insurance claims and accidents. The team handles work relating to construction projects, bank loans, and M&A transactions, as well as international litigation and arbitration. Pelin Baysal left the firm.

Intellectual property Tier 1

Gün + Partners has a broad and dedicated intellectual property offering, with teams handling patents, trade marks and copyright, anti-counterfeiting, and prosecution. Clients include major names in fashion, automotives, internet services, retail, and life sciences with operations in Turkey. The firm acts on a high volume of complex litigation, dawn raids, and patent applications. The extensive team includes practice heads Uğur AktekinBarış Zühdü Kalaycı, and Özge Atılgan Karakulak, who maintain extensive client bases across key sectors. Other key members include the highly experienced Mehmet Gün, newly promoted partner Aysel Korkmaz Yatkın and Zeynep Seda Alhas.

Practice head(s):

Uğur Aktekin; Barış Kalaycı; Özge Atılgan Karakulak

Other key lawyers:

Mehmet Gün; Aysel Korkmaz Yatkın; Zeynep Seda Alhas

Media and entertainment Tier 1

Gün + Partners' dedicated media practice acts for clients across online entertainment, television, music, film, sport, and advertising, offering  corporate governance, regulatory, and disputes support. The team regularly represents multinational media entities before Turkish courts, as well as advising on regulatory compliance and contractual issues. The team is led by Hande Hançar and Uğur Aktekin, both media-focused lawyers with broad practices.

Practice head(s):

Hande Hançar; Uğur Aktekin


‘They have depth of knowledge in matters that are important to clients in media’

‘Hande Hancar works tirelessly to ensure top service to her clients, no matter the size of the matter.’

‘They know their stuff. A great depth and breadth of experience.’

‘Ugur Aktekin is outstanding and he’s got a great team to back him up.’

IT and telecoms Tier 2

Gün + Partners has a strong focus on the telecoms industry, offering broad knowledge of Turkish regulations to a range of international clients, alongside a growing practice in data protection compliance advice. The firm is regularly referred work by international firms, and as such assists major global social media, pharmaceuticals, and gaming companies with data protection compliance, including contentious data breaches. The team is led by Filiz Toprak Esin, who made partner in 2020, and managing associate Begüm Yavuzdoğan Okumuş, who specialises in data protection and privacy matters.

Practice head(s):

Filiz Toprak Esin; Begüm Yavuzdoğan Okumuş


‘Honest, straight talking and knowledgeable team providing easy to understand advice on complex areas for international audience. Dealing with data privacy and protection matters from afar, Gun & Partners have been excellent in helping us to understand the local (and regional) requirements and advising appropriately in relation to our business and risk appetite.’

‘Knowledgeable, beyond helpful and always willing to assist in issues and questions we raise.’

Commercial, corporate and M&A Tier 3

Gün + Partners has expanded its M&A offering, adding notable new clients in the tourism and retail sectors to its existing strength in regulated industries, particularly technology and pharmaceuticals. Due to the impacts of Covid-19, the team has been particularly active in distressed M&A for corporates and family businesses. The team is led by Filiz Toprak Esin, who made partner in early 2020. Pelin Baysal left the firm in March 2021.

Practice head(s):

Filiz Toprak Esin


‘Very competent, helpful and hands-on.’

Competition Tier 4

Gün + Partners has particular expertise advising clients in the pharmaceuticals sector on merger control filings and applications for exemptions. The firm also represents clients in TCA investigations, including an ongoing matter for Red Bull. The team is led by Özge Atılgan Karakulak and Filiz Toprak Esin.

Practice head(s):

Özge Atılgan Karakulak; Filiz Toprak Esin

The firm: Gün + Partners was founded in 1986 and is one of the largest law firms in Turkey with 11 partners and over 70 lawyers. The firm is based in Istanbul and provides transactional, advisory and dispute management services to local and international companies throughout Turkey and assists clients worldwide through its established network of correspondents and contacts. The firm’s core areas of expertise are corporate and commercial, dispute management and intellectual property. It represents clients in numerous industry sectors with a particular focus on life sciences, insurance and reinsurance, energy, construction and real estate, logistics, technology, media and telecoms, automotive, FMCG, chemicals and the defence industries.

Areas of practice
Intellectual property: The firm’s expertise covers patents, utility models, trademarks, copyrights and designs. Recognised as the leading IP practice in Turkey the firm provides a full range of legal services including civil, criminal and administrative litigation, arbitration and mediation, advisory, transactional, registration, opposition, maintenance, enforcement, anti-counterfeiting and investigation. The firm advocates on Turkish IP law compatibility with international treaties and standards, individually and through local and international associations.

Dispute management: The firm is renowned for the strength and depth of its dispute management capabilities. It handles a wide variety of disputes from IP litigation and complex cross-border cases including major commercial litigation, insurance, reinsurance and construction disputes, real estate projects, corporate crime, customs and tax, agency and distribution and labour and employment disputes. The firm is also active in ADR advising clients on adhoc and institutional arbitrations including ICC and LCIA. The experienced dispute management team leads the anti-bribery practice of the firm.

Insurance and reinsurance: The firm provides insurance and reinsurance-related litigation, regulation, and M&A services to its local and foreign clients. The practice mainly provides legal assistance to London-based reinsurers on complex insurance cases mostly arising from all risk construction policy, professional indemnity insurance, D&O, bankers blanket bond, CIT and general liability insurance policies. It assists many global and local insurance and reinsurance companies regarding the new products in the Turkish market, advises them in localisation of the insurance and reinsurance policies and advises the same on regulatory matters during company establishment phase as well as for their routine operations and compliance matters.

Business crimes and anti-corruption: The practice advises on the extraterritorial effects of the foreign anti-corruption legislation, particularly of FCPA and UKBA as well as Turkish anti-corruption and ethical rules and regulations and their compatibility with foreign equivalents.

Corporate and M&A:  The practice handles high-profile acquisitions and joint ventures, incorporation and restructuring of businesses, all aspects of inward and outbound investment, franchise and distribution agreements, licensing, sales, agency and all related commercial contracts. The team has particular strength in advising clients from regulated sectors in corporate and M&A work, particularly in life sciences, TMT, energy and insurance.

Life sciences: The firm provides dedicated consultancy and litigation services for the life sciences industry. Combining the firm’s transactional, regulatory and IP experience with in-depth and current sector knowledge, the practice advises on every aspect of the business cycle of a life science product. In addition to corporate clients, the practice advises the most prominent industry associations active in the Turkish medical device, diagnostics and pharmaceuticals industries.

TMT: The firm advises on regulatory, transactional and dispute management matters in TMT business sectors involving all aspects of Turkish telecommunication and internet law, private broadcasting legislation, electronic communication services and infrastructure, wireless equipment rules and regulations and the structuring of telecommunication projects.

Data protection and privacy: The practice concentrates on personal data protection law issues such as compliance, data protection advise, data subject rights and claims, international transfers, data localisation, sector specific rules and regulations, data beach notifications, and judicial remedies; also transactions regarding data,  i.e. license agreements, acquisitions, data use and data ownership matters.

Employment: The firm provides legal services related to all aspects of employment law, advisory and litigation services on restructurings and reorganisation, employment contracts, mutual termination contracts, collective bargaining, loyalty, discrimination, mobbing, confidentiality and non-compete obligations and enforcement, job security and termination issues, employee-related IP rights and employee inventions, liability for workplace accidents, severance payment and termination compensation claims, recourse claims by social security institutions and business immigration.

International reach: We actively contribute to the promotion of business opportunities, inward and outward direct investments and to initiatives of private and government organisations for the development of Turkey’s international economic relationships with its major trading partners.

France desk:

Germany desk:

Japan desk:

Russia and CIS desk:

Department Name Email Telephone
Intellectual Property, Dispute Management, Corporate and M&A, Life Sciences, Competition, Finance Mehmet Gün + 90 (212) 354 00 12
Intellectual Property, Anti-Counterfeiting, Business Crimes and Anti-Corruption, Trademarks and Designs, Copyrights Barış Kalaycı + 90 (212) 354 00 40
Intellectual Property, Trademarks and Designs, Copyrights, IP Prosecution, Technology, Media and Telecom, Life Sciences Hande Hançar + 90 (212) 354 00 73
Life Sciences, Intellectual Property, Patents and Utility Models, Competition Özge Atılgan Karakulak + 90 (212) 354 00 24
Intellectual Property, Patents and Utility Models, Life Sciences Selin Sinem Erciyas + 90 (212) 354 00 24
Intellectual Property, Trademarks and Designs, Copyrights, IP Prosecution, Technology, Media and Telecom Uğur Aktekin + 90 (212) 354 00 22
Intellectual Property, Trademarks and Designs, Anti-Counterfeiting, IP Prosecution, Copyrights Zeynep Seda Alhas + 90 (212) 354 00 40
Dispute Management, Corporate and M&A, Business Crimes and Anti-Corruption, Competition, Data Protection and Privacy, Life Sciences Filiz Toprak Esin + 90 (212) 354 00 24
Intellectual Property, Patent and Utility Models, Insurance and Reinsurance Aysel Korkmaz Yatkın + 90 (212) 354 00 22
Intellectual Property, Trademarks and Designs, Copyrights, IP Prosecution Mutlu Yıldırım Köse + 90 (212) 354 00 22
Intellectual Property, Trademarks and Designs, Copyrights Güldeniz Doğan Alkan + 90 (212) 354 00 24
Photo Name Position Profile
 Uğur Aktekin  photo Uğur Aktekin Partner Uğur Aktekin joined the firm in 1999 and has been a…
 Özge Atılgan Karakulak  photo Özge Atılgan Karakulak Partner Özge Atılgan Karakulak has been with the firm since 2005 and…
 Görkem Bilgin  photo Görkem Bilgin Managing Associate Görkem Bilgin has been working for the firm since 2012…
 Dicle Doğan  photo Dicle Doğan Managing Associate Dicle Doğan is a managing associate in Gun + Partners…
 Güldeniz Doğan Alkan  photo Güldeniz Doğan Alkan Partner Güldeniz Doğan Alkan joined the firm in 2006 and has been…
Mrs Selin Sinem Erciyas  photo Mrs Selin Sinem Erciyas Partner Selin Sinem Erciyas joined the firm in 2006 and became a…
Ms Filiz Toprak Esin  photo Ms Filiz Toprak Esin Partner Filiz Toprak Esin has been with the firm since 2006 and…
 Mehmet Gün  photo Mehmet Gün Partner Mehmet Gün, the founder of the Firm, is truly a self-made…
 Hande Hançar  photo Hande Hançar Partner Hande Hançar joined the firm in 2005 and has been a…
 Barış Kalaycı  photo Barış Kalaycı Partner Barış Kalaycı joined the firm in 1997 and has been a…
 Asena Aytuğ Keser  photo Asena Aytuğ Keser Senior Associate Asena Aytuğ Keser has been with the firm since 2011…
 Aysel Korkmaz Yatkın  photo Aysel Korkmaz Yatkın Partner Aysel Korkmaz Yatkın joined the firm in 2008 and became a…
Ms Zeynep Seda Alhas  photo Ms Zeynep Seda Alhas Partner Zeynep Seda Alhas joined the firm in 2006 and became a…
 Mutlu Yıldırım Köse  photo Mutlu Yıldırım Köse Partner Mutlu Yıldırım Köse has been with the firm since 2006 and…
Mr Talat Yörük  photo Mr Talat Yörük Managing Associate Talat is a managing associate in Gün + Partners and…
 Begüm Yavuzdoğan Okumuş  photo Begüm Yavuzdoğan Okumuş Managing Associate Begüm Yavuzdoğan Okumuş is a managing associate in Gün +…
Ms Beril Yayla Sapan  photo Ms Beril Yayla Sapan Managing Associate Beril Yayla Sapan joined the firm in 2008 and is…
Number of lawyers : 70
IBA (International Bar Association)
AIDA International Insurance Law Association
GALA (Global Advertising Lawyers Association)
INTA - International Trademark Association
ECTA (European Communities Trade Mark Association)
Pharmaceutical Trade Marks Group (PTMG)
International Federation of Intellectual Property Attorneys (FICPI)
AIPPI (The International Association for the Protection of Intellectual Property)
Chartered Institute of Trade Mark Attorneys (CITMA)
APRAM (Association des Praticiens des Marques et Modèles)
German Association for the Protection of Intellectual Property (GRUR)