Patcharanon Bumroongsook


Patcharanon advises on a wide range of corporate and commercial transactions including corporate restructuring and reorganisations, and mergers and acquisitions. 

She has worked extensively with clients in equity capital market transactions and has advised numerous publicly listed and privately held companies on securities and exchange-related laws and transactions, including initial public offerings, issuance of warrants, tender offers and delisting of securities. She also regularly advises on regulatory and compliance matters including financial services, cryptocurrency and digital assets and employment, and contributes to various domestic and international pro-bono projects.

Patcharanon works with major international clients across jurisdictions and in multiple sectors including banks, communication and media, consumer and retail, energy, industrial, technology and many more, particularly those that provide products or services or conduct marketing activities on a cross-border basis.


Pro bono

Advised Orchid Project regarding the legal frameworks and regulatory regime for female genital mutilation.

Advised the Global Fund to Fight AIDS, Tuberculosis and Malaria in relation to the legal frameworks and regulatory regime for access to sexual and reproductive healthcare for young persons.

Advised Borderless360 on their collaboration to establish a joint inclusive education programme for refugees in Thailand with the People’s Empowerment Foundation.

Advised Alliance Anti-Trafic on issues related to the protection of their reports and original ideas regarding models for the reduction and prevention of harm to victims of human trafficking.

Leadership Positions And Professional Affiliations

  • Member, Lawyers Council of Thailand



Admitted as notarial services attorney, Thailand, 2015

Admitted as lawyer, Thailand, 2013


LL.M., Japanese Government Scholarship, Kyushu University, Japan, 2018

LL.M., University of Pennsylvania, PA, USA, 2013

Wharton Business and Law Certificate, University of Pennsylvania, PA, USA, 2013

LL.B. (First Class Honours), Chulalongkorn University, Thailand, 2011


English, Thai
A&O Shearman was formed on May 1, 2024 by the combination of Shearman & Sterling LLP and Allen & Overy LLP and their respective affiliates (the legacy firms). Any matters referred to above may include matters undertaken by one or more of the legacy firms rather than A&O Shearman.