Why MH?

We have built a culture based on ethical principles, technical excellence, professional commitment and proximity to our clients. We became one of the most recommended law firms in the south of Brazil.

We have developed secure and innovative legal solutions. We contribute defining our clients’ strategies by offering a multidisciplinary and specialized vision. We provide assistance in sizing, organizing, and managing risks in the formulation, development, and execution of complex businesses.

We think on the long term, investing, giving value, and granting professional growth to our people, keeping a cohesive, updated, and specialized team of professionals.

We are pioneers in Santa Catarina in the development of actions that encourage social development. We have assigned part of the firm’s revenue to projects aimed at inclusion, education, culture, health, and sports.

Currently, we have offices in Santa Catarina and São Paulo. We are also member of an organization with more than 800 affiliated firms in Brazil and abroad.


1969Oswaldo Horn initiates his practice as an attorney.1999Rafael Horn becomes his father’s partner. The law firm Horn Advogados Associados is formed.2001Hélio Mosimann, former judge of the Brazilian Federal High Court “Superior Tribunal de Justiça”, becomes a partner of the firm, named as Mosimann, Horn & Advogados Associados.
2002The firm’s practice widens in the areas of Criminal Law and Labor Law, headed by the attorneys Acácio and Marcelo Sardá.2005The publication Análise Advocacia 500 considers Mosimann-Horn as one of the most admired firms of Brazil. The headquarters is improved.2006The practice aimed at Business Law becomes consolidated. Douglas Dal Monte and Rodrigo Horn join as partners of the firm.
2007Lio Bocorny, Fábio Silveira, and Ítalo Mosimann join as partners of the firm. New areas of practice are developed and become consolidated, mainly related to Corporate and Administrative Law.2012A specific team for mass litigation is created aimed at the insurance market, nowadays formed by 12 attorneys and handling more than 8.000 lawsuits. Luana Tomasi and Janaína Silveira join as partners of the firm.2013The esteemed UK-based legal directory Chambers and Partners ranks, for the first time, Mosimann-Horn among the top dispute resolution law firms in the South of Brazil, achievement that repeats itself on the following years (2013-2018).
2014The MH Social programme is created, a pioneer in the subject of corporate responsibility of law firms in the south of Brazil.2015Lucas Silva, Clarissa Cardoso, and Bruno Silva join the firm as partners. The headquarters is once again improved.
2016The mass litigation team is awarded second place in the ranking of national law firms providing services for the consortium of insurance companies Seguradora Líder – DPVAT.2017The MH Social programme receives the Lumen award, in the category of social responsibility.
2018-France-based legal directory Leaders League nominates Mosimann-Horn as one of the best firms in Brazil in the practice area of civil and commercial litigation. A new visual identity is presented, reflecting a cohesion between innovation and experience, a result of a meeting of generations. An office in São Paulo is opened at WeWork, serving as a bridge for clients with businesses in the Brazilian “business capital”. Optima MH program is launched, a disruptive movement of innovation, technology and agile management.