Firm Profile > Acar & Ergönen Law Firm > Istanbul, Turkey

Acar & Ergönen Law Firm
34345 ?STANBUL

Dispute resolution Tier 5

Acar & Ergönen Law Firm advises on corporate and commercial disputes with a particular focus on shareholder and M&A-related disputes. It represents foreign and domestic clients in litigation and arbitration proceedings before the ICC. The firm generates mandates from clients in areas such as real estate, construction, energy and healthcare. Onur Ergönen, who focuses on corporate and commercial law related disputes, leads the team.

Practice head(s):


‘Acar & Ergonen is a law firm with strong knowledge of multi-national law’.

‘Its comparatively small size allows them to be more invested in their clients and more flexible to respond to clients urgent needs’.

‘They are well informed in many sectors and show the ability to think like solution-oriented business people when it comes to closing deals’.

‘Acar & Ergonen team greatly care about client needs and they give their legal advice after taking into account the client corporate environment’.

‘They have great understanding about multinational corporate processes and work environments’.

‘Partners Mr. Onur Ergonen and Ms. Duygu Acar always take a 360 degree approach before giving legal advice’.

‘They evaluate each legal issue in relation with legal, judiciary, commercial and technical aspects’.

‘The level of perfectionism, legal knowledge and experience in relation to challenging and international cases is rare in Turkey’.

‘They have a holistic approach, think through all angles and approaches, and have extensive practical experience’.

‘Their calm, confident approach, especially in the courtroom, inspires a lot of confidence and trustworthiness’.

Key clients

Multi Corporation Turkey

Gefco Taşımacılık ve Lojistik A.Ş.

(Gefco Turkey)

Remo Emlak Hizmetleri ve Gayrimenkul A.Ş.

(Keller Williams Turkey)

Wittur Holding GmbH

Çimtaş Boru İmalatları ve Ticaret Limited Şirketi

Başar Başaran and Haşim Çağan Şentürk

The Reklam Hizmetleri A.Ş.

Hanwha Solar One Hong Kong Limited

Hanwha Q Cells Corporation

NEF Construction Group

Affidea Health Group

Peerton Bilişim Teknolojileri Danışmanlık Turizm ve Ticaret A.Ş.

Bebek Turizm Ticaret İnşaat A.Ş.

Peerton Bilişim Teknolojileri Danışmanlık Turizm ve Ticaret A.Ş.

İpek İnşaat ve Çakırkaya Ortak Girişimi

Git Girişim İnşaat Ticaret Anonim Şirketi

Yönak İnşaat Ticaret Anonim Şirketi

Keskin Holding A.Ş.

Acar & Ergönen is a law firm providing domestic and international clients with creative and effective solutions tailored to each client’s needs by handling legal matters with a result-oriented approach and assessing all possibilities and risks in a broad perspective.

Our firm renders consultancy, litigation, arbitration and alternative dispute resolution services to its clients in a variety of legal areas including, primarily, corporate and commercial law, mergers and acquisitions, contract law, foreign direct investments, tax law, employment law, intellectual property law, media and advertising law, consumer law, construction and real estate law and health law.

Our team consists of attorneys experienced in both dispute resolution and consultancy areas who are, therefore, competent in making accurate and effective risk assessments in line with our firm’s overall approach.

Department Name Email Telephone
Duygu Acar Yücesoy +902123580700
Onur Ergönen +902123580700
Photo Name Position Profile
 Duygu Acar Yücesoy  photo Duygu Acar Yücesoy Partner
 Onur Ergönen photo Onur Ergönen Partner
Partners : 2
Lawyers : 10
Other staff : 3
IBA (International Bar Association)
Corporate Governance Association of Turkey (TKYD)
AHK Deutsche Handelskammer

CLIENT: Ahu Hacıömeroğlu Ergin – Director, Legal and Compliance at Multi Turkey Yönetim A.Ş.
COMPANY/FIRM: Multi Turkey Yönetim A.Ş.
TESTIMONIAL: I have been working with Acar & Ergönen Law Firm for more than 2 years. I am admired of their way of working. First, they specialised in their field so that they can provide efficient and timely legal advice that fits into the business requirements. Second, they are very good at understanding the needs of the client and accordingly they provide tailor-made legal services with a pragmatic approach. Third but not the last, they are very professional, ethical and trustworthy. I strongly recommend them to everyone who seeks first-class legal service.

CLIENT: Haşim Çağan Şentürk
COMPANY/FIRM: Salbaze/Haşim Çağan Şentürk
TESTIMONIAL: I have had the pleasure of working with Onur Ergönen and Duygu Yücesoy, both partners of Acar&Ergönen, for the last four years on an international multi-faceted legal dispute my partner and I are involved in against big conglomerates in Europe.

For the duration of our working together, I have always been more than impressed with their professionalism and efficiency as much as the depth and breadth of their knowledge not only in Turkish law, but in German law as well.

They are always very direct, honest and informative in their approach. Through their extensive experience, they are quite impressive in recognising potential risks and pitfalls in legal proceedings. We are completely satisfied in all aspects of our collaboration.

CLIENT: Basar Basaran
COMPANY/FIRM: Salbaze/Basar Basaran
We have been working with Onur and Duygu for the past four years in highly complex and connected case
across three countries: Turkey, Germany and Luxembourg.

They form a powerful, hard-working litigation duo with laser-sharp focus. Their attention to detail is superb. Their legal know-how and continued desire to build it further are remarkable.

Their availability, resourcefulness and articulateness are also worth noting. Their strategic ability to think out-of-the-box, and perseverance in checking every angle of an argument have served our case well. Their theoretical grasp of law is strong; their presence in the courtroom is stronger.