Pioneers in Colombia

We have always been ready and willing to innovate and explore, taking on the most complex transactions, problematic litigation cases and challenging projects with the aim of improving the national and international legal landscape.

Our founding partner, Diego Muñoz Tamayo, set the tone with the firm´s first endeavors, advising on large-scale privatizations in Colombia, including the transfer of the highest volume of state-owned assets the country has yet seen.

1992 - 1993
Right to Good Name and Representation
Diego Muñoz Tamayo successfully presented the first constitutional protection action (acción de tutela) of fundamental rights that obliged the media to correct published false information that harmed a person´s reputation.
1992 - 1993
1994-2007
Privatization
Diego Muñoz Tamayo and his team were at the forefront of privatization processes in Colombia. MTA acted as legal counsel for government agencies in the sale of a very significant percentage of the assets in the gas and electric energy sectors, with a total transaction value exceeding US$5 billion (the equivalent of US$9 billion in 2021 prices).
1994-2007
1996
Privatization by Means of Successive Stock Offerings
MTA continues as the leading privatization law firm in Colombia through devising a groundbreaking move: the implementation of a privatization process through successive stock offerings. Although this legal instrument had been created in 1995, MTA´s move marked the first time it was used in Colombia.
1996
2000
Change in Procedural Case Law
The firm expanded the scope of interpretation of the procedural law sentence based on a ruling of the Constitutional Court by which mental illness was recognized as a disabling health factor that allows the suspension of judicial proceedings. The firm expanded the scope of interpretation of the procedural law sentence based on a ruling of the Constitutional Court by which mental illness was recognized as a disabling health factor that allows the suspension of judicial proceedings.
2000
2001 - 2004
Corporate Restructuring
While Law 550 of 1990 was in force the firm was at the forefront of the first restructuring of a company in the telecommunications sector, at the time, one of the largest ever in Colombia. This corporate restructuring started the trend for many to follow as the country’s development continues.
2001 - 2004
2002
Protection for Minority Shareholders
In the first case of this type in Colombia, MTA achieved effective protection for minority shareholders from the former Colombian Securities Commission.
2002
2002 - 2004
Good Corporate Governance Practices
The firm designed and drafted the first Good Corporate Governance practices for a Colombian state entity.
2002 - 2004
2003
First Unwinding of a State Entity by Means of an Operational Trust
MTA designed the legal and contractual structure for the first unwinding of a state entity, Telecom. The integrity of the assets whose value exceeded US$4 billion was protected by means of a trust structure.
2003
2004
Privatization Doctrine
Diego Muñoz Tamayo wrote the first book about privatization in Colombia, which remains the most authoritative doctrinal source on this topic.
2004
2004
Electronic Commerce Law
Diego Muñoz Tamayo presided over an arbitration tribunal where evidence was presented by means of video conference, applying the legal basis for the Law of Electronic Commerce for the first time in the country.
2004
2005 - 2009
Purchase of Non- and Underperforming Asset Portfolios
The firm designed the contractual structure that allowed foreign financial entities for the first time to buy underperforming credit portfolios in Colombia.
2005 - 2009
2006
“Virtual Competitor” in Privatizations
MTA designed and carried out a virtual mechanism for privatization procedures by using a sealed envelope which contained a hidden minimum price below which the state would not sell. The undisclosed minimum was only revealed after the offers from interested parties were made public. Although later judicially challenged, this mechanism prevailed.
2006
2006 - 2009
Changes in the Regulatory Framework in the Healthcare Sector
Diverse administrative and judicial actions undertaken by the firm have produced important changes in the framework and regulatory development of the social security health system in Colombia.
2006 - 2009
2007 - 2008
Mechanisms for Clean Development
MTA structured and participated in the initial trials for the implementation of carbon emission mechanisms for clean development.
2007 - 2008
2008 - 2009
Regulatory Correction by Means of a Writ of Protection
The firm made groundbreaking use of a constitutional rights protection action by using one as an instrument of regulatory correction, obtaining a historic ruling from the Constitutional Court of Colombia. Sentence T–760 of 2008 redefined the regulatory framework of the healthcare sector.
2008 - 2009
2008 - 2009
International Claim
MTA was a pioneer in filing the first international foreign investor claim against the Republic of Colombia under a bilateral investment treaty.
2008 - 2009
2010-2011
Leniency Program
The firm advised on the first leniency program in Colombia under the Law 1340 of 2009.
2010-2011
2011
Good Faith Standards in the Performance of Contracts
Diego Muñoz Tamayo presided over an arbitration tribunal that extended the principle of good faith in the performance of contracts, linking it to good corporate governance practices, company values and business social responsibility.
2011
2013
Abuse of Majority Rights by Shareholders
MTA won the first case in Colombian history for the annulment of a decision adopted through the abusive exercise of majority vote, before the mercantile proceedings jurisdiction of the Superintendence of Corporations.
2013
2014 - 2015
Environmental Liabilities
The firm’s environmental team helped develop a regulatory strategy for the intervention of areas affected by abandoned mining activities for which the Mining and Energy Planning Unit (UPME), a Special Administrative Unit of the National Energy Commission, was responsible.
2014 - 2015
2014 - 2015
Environmental Liabilities
The firm participated in the design of an integral strategy for the management of environmental liabilities in Colombia, managed by the Minister of Environment and Sustainable Development. This issue has no current regulation in Colombia, and we assisted by putting forward a practical proposal for how it might work.
2014 - 2015