Firm PROFILE
SIGMA Advogados
Chambers ranking badge

SIGMA Advogados

Europe 2026

Chambers ranking badge

Rankings

Europe

Leading firm in Europe 2026

Top figures

14

Lawyers

1

Offices

2025

Established Year

Content provided by SIGMA Advogados

Overview

Provided by SIGMA Advogados

SIGMA Advogados is an independent Portuguese full-service business law firm providing partner-led advice to domestic and international clients. The firm advises on corporate and commercial law, M&A, projects and infrastructure, public law, employment and social security, immigration, dispute resolution, medical liability, tax, real estate, inheritance, insurance, compliance and data protection, with particular experience in complex transactions and cross-border matters and regulated sectors.

Industry sectors (15)

  • Energy
  • Social Services
  • Wine and turism sectors
  • Healthcare
  • Motor Industry
  • Cosmetics
  • Banking and finance corporation
  • Water
  • Wood transformation
  • Metal transformation
  • Cork transformation
  • Sports
  • Textiles
  • Music
  • Retail

Capabilities (15)

  • employment and social security law
  • immigration
  • litigation
  • corporate and commercial law
  • M&A
  • infrastructure and project contracts
  • tax law
  • real estate
  • compliance
  • data protection
  • inheritance and family law
  • public law
  • insurance
  • medical liability
  • sports

Key people

Provided by SIGMA Advogados

  • Rui Assis

    Partner

  • Paulo Ortigão de Oliveira

    Partner

  • Luís Miguel Sequeira

    Partner

  • Mariana Albuquerque Oliveira

    Managing Partner

  • Tiago Cardoso da Silva

    Partner

  • Irma Rodrigues Picão

    Partner

  • Carla Naia

    Managing Partner

  • Jorge Barros Mendes

    Managing Partner

  • Marlene Carreiras Nogueira

    Partner

  • Lino França

    Of Counsel

Work & experience

Provided by SIGMA Advogados

SIGMA Advogados is guided by a partner-led philosophy grounded in competence, loyalty, responsibility and results. The firm combines technical rigour with a pragmatic and innovative mindset, delivering clear and business-oriented advice. With senior involvement in all matters and lean teams, SIGMA focuses on efficiency, transparency and long-term client relationships, while supporting clients in increasingly international and complex environments.

Ranked Offices at SIGMA Advogados

Provided by SIGMA Advogados

Portugal - Head office

Porto

Rua Caldas Xavier, 38 5D , Oporto, Porto, Portugal, 4150-162, Oporto

Ranked Individuals at SIGMA Advogados (1)

Porto

Top figures

14

Lawyers

1

Offices

2025

Established Year

Content provided by SIGMA Advogados

What success is built on

Chambers is the leading data and intelligence partner for the legal sector.

Explore thought leadership