Riddell Williams P.S. was a law firm with practice areas included antitrust, corporate transactions and finance, executive compensation and employee benefits, financial services and creditors' rights, litigation, privacy and data security, product liability, trusts, estates and personal planning, and tax. The Firm's clients included companies from the aerospace and transportation, environment, energy and utilities, financial institutions, food and beverage, healthcare, insurance, manufacturing and distribution, real estate, leisure, retail and consumer products, technology, and media sectors. Riddell Williams was formed in 1906 and was based in Seattle, Washington.