Dennis Yiu Tong Ong

"Dennis Ong is a stand-out lawyer. He is relentless in his work ethic and is an exceptional advocate. He brings together a talent for understanding complex insurance matters with the ability to stand up in a courtroom and make submissions on the matter."

Dennis is a fearless litigator who brings passion and intensity when representing his clients’ interests. He has extensive experience in litigating civil and insurance disputes and has an undeniable track record of success in both trials and appeals.

Dennis is Chambers and LEXPERT ranked as a Top Practitioner in Insurance: Dispute Resolution in Canada, Commercial Insurance, and is recognized in the Legal500. Dennis is policyholder counsel representing the interests of corporate and sophisticated policyholders in their complex disputes as against insurance companies. He has litigated a wide range of insurance-related disputes as insurance defence counsel for 17 years. For almost a decade, Dennis worked as senior litigation counsel at one of Canada’s largest property & casualty and commercial insurers, where he defended commercial insureds and advanced the interests of insurers. Dennis now represents sophisticated policyholders, leveraging his unique perspective as former insurance defence counsel to provide clients with a strategic advantage in challenging, complex disputes against insurance companies. Dennis has a deep understanding of the complexities of insurance policies and excels at distilling them into compelling arguments in court.

Dennis has particular expertise in reviewing, interpreting, and analyzing commercial general liability, primary, umbrella, and excess insurance policies in the context of sophisticated towers of insurance. Dennis has extensive experience in insurance claims involving large loss property damage, business interruption, indemnity & defence costs, representations & warranties, cyber & data breach, errors & omissions, Directors & Officers, class action settlement recovery, environmental & pollution, and legacy & long-tail claims.