A majority of money raised in recent months by Bill Gross for new employer Janus Capital Group came from the Southern California brokerage office where one of Gross’s personal financial advisers works, according to industry executives who have viewed confidential brokerage data.

The Morgan Stanley wealth-management office in La Jolla, California routed more than $700 million to Gross's Janus Global Unconstrained Bond fund in October and November, according to people familiar with the matter who viewed brokerage-firm client data from Albridge, a data company owned by Bank of New York Mellon Corp.