Guillermo Bueno



Mergers and Acquisitions

Private Equity

Corporate Law

Capital Markets


Languages: English, Catalan and Spanish

Guillermo Bueno, Araoz & Rueda partner since 2021, joined our corporate department in 2013 after four years in the M&A department of Uría Menéndez.

Guillermo has experience in general commercial advice to national and foreign companies. He specializes in all types of transactions involving the sale of shares, participations, investments and divestments, as well as public offerings for acquisition, joint ventures, corporate restructuring and sale of assets, advising industrial clients and venture capital entities, both on behalf of the buyer and the seller.

He also advises regularly companies from multiple sectors (financial, health, telecommunications, internet, real estate, transport, etc.) in corporate and corporate governance matters, acting, in many cases, as secretary to the board of directors.


  • LL.M. from the Instituto de Empresa (2009).

  • J.D. from the Universidad Pompeu Fabra (2007).

GBC - Chambers Europe 2020
GBC - Best Lawyers 2021

The team maintains a consolidated reputation in the mid-cap M&A market. Regularly assists international companies and funds with inbound investment. Popular choice for foreign law firms looking either to refer key clients to a smaller Spanish firm or to work together on transnational M&A projects. Client portfolio comprises entities from the life sciences, transportation and TMT sectors. Strengths The firm garners praise for its "great experience," with one source adding that it is "a classic boutique for M&A." Clients find further value in the team's "immediate response and absolute availability." Work highlights Assisted Mazuelo Holding with the EUR230 million takeover bid launched over Spanish wine producer Barón de Ley. Pedro Rueda leads the team and enjoys a strong reputation as "an excellent lawyer." He offers significant experience in the acquisition and sale of Spanish companies, as well as advising domestic private equity funds on cross-border transactions. Alejandro Fernández de Araoz is widely known for his experience and draws strong praise from clients for his "commercial vision." He advises on M&A deals in the pharmaceutical, renewable energy and financial services sectors. Guillermo Bueno assists with transactions in the manufacturing, construction and automotive sectors. Clients say that he "delivers the product promptly and the quality of work is excellent."

Chambers Europe Guide 2020

“¿Qué conceptos retributivos de los consejeros ejecutivos deben incluirse en los Estatutos Sociales?”

Publication: Capital & Corporate Magazine Nº 49
Authors: Guillermo Bueno
Date: September 2019

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¿Están obligadas las sociedades a repartir un dividendo mínimo?

Publication: Capital & Corporate Magazine Nº 39
Authors: Guillermo Bueno
Date: March 2017

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¿Cuáles son las consecuencias de que el Consejo de Administración no se reúna una vez al trimestre?

Publication: Capital & Corporate Magazine Nº 36
Authors: Guillermo Bueno
Date: July 2016

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“Partial Reform of the Spanish Companies Law”

Publication: Journal of International Banking Law and Regulation
Authors: Guillermo Bueno
Date: 2012

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