Prolegis is a premier boutique corporate and commercial law firm in Singapore.

The firm was founded in 2012 by Singapore practitioner Ban Leong Oo, who has over two decades of cross-border experience, acting for local and multinational corporations as well as governments and related institutions.

Prolegis and leading international law firm Herbert Smith Freehills have been registered as a Formal Law Alliance in Singapore since 2015, formalising a longstanding and close working relationship between the two firms.

The alliance creates a “one-stop shop” for clients to access the legal services of each firm – the Singapore law expertise of Prolegis and the international skills of Herbert Smith Freehills’ global network spanning Asia Pacific, Europe, the Middle East and Africa, and North America.

Prolegis represents local and international enterprises on their business ventures in Singapore and across the region. The firm provides legal advice on a broad range of corporate, projects and infrastructure, commercial and financial transactions, insolvency and restructurings as well as in contentious dispute matters. The team advises across a range of sectors, with expertise in technology, energy and infrastructure, financial services, employment, private capital, investments, regulatory enforcement, corporate governance and advisory.

All Prolegis senior lawyers are at least dual qualified in Singapore and another international jurisdiction, with a significant proportion of its directors having practised at global elite international law firms. The firm’s range and depth of regional experience in corporate matters, allows it to add value and assist in applying international standards in complex local regulatory and legal environments.

Our team is known for its practical and commercial approach to helping clients achieve their business goals and this is recognised by international legal directory commendations of our lawyers. We place a particular emphasis on sensitivity to cultural nuances in the region and this, combined with our understanding of the complex legal and regulatory challenges faced by clients in Asia, means that we understand the growing and ever-changing demands of doing business in the region.


Daniel Chia

+65 6812 1363

Ban Leong Oo

+65 6812 1351

Adrian Wong

+65 6812 1355

Victor Chiew

+65 6868 9826