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Guillermo Aguayo

Guillermo Aguayo

Latam Practice Group Regional Co-Leader, Tax

Guillermo Aguayo provides tax advice in cross-border and domestic mergers, acquisitions and corporate reorganizations. He additionally advises on tax matters related to all types of financing transactions and securities offerings in addition to representing clients in tax audits, disputes and negotiations with authorities on tax, customs and foreign trade issues.

Bar admissionsMexico


Advised railroad freight company with operations in Mexico on various matters, including the merger of its US parent with a Canadian railroad valued at US$31 billion, resulting in the creation of a single-line rail network linking the US, Mexico and Canada. Additionally advised on the structuring and negotiation of two joint ventures for the construction of a unit train liquid fuels terminal and for the construction and operation of a refined energy products fuel terminal

Advised an independent global infrastructure manager in its acquisition of a leading digital infrastructure provider in Mexico

Assisted North American energy infrastructure company in the sale of a 20-percent stake to an American global investment company for US$3.37 billion

Advised a US-based gold and copper producer with operations worldwide in its US$10 billion acquisition of a Canadian senior gold producer

Assisted the issuer on the IPO of the first energy and infrastructure investment trust focused on the electric sector in Mexico, in which US$880 million was raised

    • Universidad de Monterrey School of Law, Law Degree, 2000, cum laude
    • Georgetown University Law Center, LL.M., 2003, Fulbright Scholar
  • LL.M., Georgetown University Law Center


  • The Legal 500 Latin America, Recommended, Mexico Tax (2024)
  • Chambers & Partners, Leading Lawyer in Tax, 2016-2020
  • A team led by Guillermo was ranked by The Legal 500 and International Tax Review in all editions during the period he held the position
  • Full-Tuition Scholarship, Excellence Grant, Fundación Telmex, 1996 


"Doing Business in Mexico: Chambers Guide 2023" July, 2023

"Doing Business in Mexico • Chambers Guide 2022" August, 2022

"Mexico • Top points from the latest OECD Tax Administration Report" July, 2022

Media Mentions

Prior Experience

Before joining DLA Piper, Guillermo was a partner and head of the Mexico practice a global law firm. He also served as an associate at a major Mexican law firm and a multinational accounting firm.

Memberships And Affiliations

    International Tax Committee, Instituto Mexicano de Contadores Públicos