wirehouse

noun2

1. •
   (US, Canada) A major brokerage company, generally nationwide, with multiple branches.

   • Ten years ago, the Wall Street wirehouse brokerage firm seemed unassailable – part of the very firmament underpinning the entire investment industry from coast to coast. — 2012
2. •
   (US, no longer used) A brokerage company with a telegraph line, telephone line, or electronic communication network.

   • The so-called ‘wire house’ …is a product of the boom times. — 1904