EP Wealth Scoops Up $900M Silicon Valley RIA by Ali Hibbs Erin Whalen (L) and Mark Duvall have sold their Menlo Park RIA to EP Wealth. EP Wealth Advisors, a $44 billion fee-only RIA based in Los Angeles, acquired a California firm with around $900 million in assets, according to an announcement on Tuesday. Menlo Park-based Opes Wealth Management was founded in 2005 by former Wells Fargo advisor Mark T. Duvall, who runs the practice along with Erin Whalen, according to the announcement.