

Partner at Blake, Cassels & Graydon LLP
Simon Seida is a highly skilled legal expert specializing in commercial litigation, based in Quebec and New York. As a partner at Blake, Cassels & Graydon LLP, Simon brings extensive experience to cases involving class actions, disputes between competitors, professional malpractice, and post-closing disputes. He has a proven track record representing clients in both obtaining and defending against injunctions, seizures before judgment, and other extraordinary proceedings.
Simon regularly appears before civil courts and administrative tribunals throughout Quebec, handling complex civil, penal, and class action trials. His comprehensive practice includes advising corporations and individuals on regulatory and criminal matters, such as anti-corruption, competition, securities, and financial regulations. Simon provides expert guidance to clients responding to search warrants and investigations conducted by government authorities, and assists in conducting internal investigations.
He is experienced in defending clients during enforcement proceedings initiated by government bodies, public prosecutors, and securities regulators, as well as self-regulatory organizations. Simon has a robust history of assisting national and international corporations in dispute avoidance, litigation, and ensuring compliance with penal statutes across Quebec and Canada.
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