By Michael Calia 

Legendary bond investor William H. Gross is leaving Pacific Investment Management Co., the company he helped found, to join Janus Capital Group Inc.

Mr. Gross will manage a newly created Janus Global Unconstrained bond fund and related strategies, Janus said in a news release Friday morning.

"I look forward to returning my full focus to the fixed income markets and investing, giving up many of the complexities that go with managing a large, complicated organization," Mr. Gross said in a statement released by Janus. "I chose Janus as my next home because of my long standing relationship with and respect for CEO Dick Weil and my desire to get back to spending the bulk of my day managing client assets."

Mr. Gross co-founded Pimco in 1971 and had run the world's largest bond fund there, while overseeing more than $1.9 trillion in securities, according to the company's website.

Write to Michael Calia at michael.calia@wsj.com

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