Siguion Reyna Montecillo & Ongsiako takes pride in being the owner of the largest private law library in the Philippines and is a state-of-the-art law firm that has not foregone its traditional excellence. The firm's IP department, led by star attorney Celso Cruz, corresponds with clients in all matters of the Philippines IP laws and initiates and defends against enforcement actions. Cruz is retained by regional companies, such as Cathay Pacific, San Miguel and Petronas, as well as Fortune 500 companies, including ExxonMobil, Unilever and HSBC.