Walnut Creek, CA
Since its founding in 1988, Heffernan Insurance Brokers has grown its revenue to more than $100 million with offices in California, Oregon and Missouri. Heffernan has built a reputation around niche practice expertise in areas such as nonprofits, construction, healthcare, transportation, hospitality, the food industry, real estate and technology. Heffernan has regularly been named a Top Corporate Philanthropist; on average, the firm has donated more than 10% of its profits to charity annually, including one year in which it gave 22% of profits to charity.