A wirehouse broker advises clients and trades stocks and other assets on their behalf as an employee of a full-service brokerage house. The word "wirehouse" implies that they are employed by one of the big players rather than working on their own or with an independent broker-dealer company.

The four largest and best-known full-service wirehouse brokerage firms today are Morgan Stanley, Bank of America’s Merrill Lynch, UBS, and Wells Fargo.

"Wirehouse" is an archaic term for a broker-dealer.