It was noted that the relationship between Gundlach and senior members such as Marc Stern and Robert Addison Day had deteriorated before then.

[2][3][4][5][6] In December 2009, shortly after leaving TCW, Gundlach, Philip Barach and 14 senior members of their team set up DoubleLine Capital in Los Angeles, California.

Gundlach and Barach reached out to Howard Marks who was the co-founder of Oaktree Capital Management as well as a former employee of TCW who knew them during their time there.

[2][3][4][5][6] On 6 April 2010, DoubleLine started accepted investor money and launched its own Total Return Fund which was managed by Gundlach himself.

[12][13] In February 2022, DoubleLine moved its headquarters from Los Angeles to Tampa, Florida due to its tax laws.

Prior to that, DoubleLine served as sub-advisor to ETFs offered by State Street Global Advisors and AdvisorShares.