Kozlowksi first joined Janus Capital in 2000 before departing in 2008 to set up his own hedge fund, Plaisance Capital, which was subsequently bought by the Denver-based asset manager.
In his latest stint, Kozlowksi ran the Janus Opportunistic Alpha, which will now be taken on by Nick Schommer. He currently manages the Janus Henderson Forty Fund, which is aimed at US-based investors.
A spokesman for the asset manager confirmed Kozlowski’s decision to leave Janus Henderson is personal and unrelated to the recent merger of the two companies.
It is understood that Kozlowski is taking the hedge fund with him and will no longer be employed by Janus Henderson.
Commenting on the departure, a spokesman said: ‘Nick Schommer has demonstrated success managing high-conviction portfolios and we are excited to have him bring that expertise to the Opportunistic Alpha strategy. Dan will remain at the firm for a transition period.’
Over three years to the end of June 2017 the Janus Opportunistic Alpha fund returned 6.88% in US dollar terms.
This compares to a rise of 37.16% by its Citywire-assigned benchmark, the Russell 1000 Growth TR, over the same time frame.