DoubleLine Funds, whose co-founder Jeffrey Gundlach is widely followed for his investment calls, on Friday reported $945 million in net additional investments in April, the 15th consecutive month it has attracted new money.

The Los Angeles-based firm said the DoubleLine Total Return Bond Fund, its largest portfolio by assets, also had positive inflows in April.

The Total Return attracted a net inflow of $633 million last month, compared with $851 million in March. It has $46.2 billion in assets under management and invests primarily in mortgage-backed securities.

The fund, which marked its five-year anniversary last month, delivered an annualized total return of 7.81 percent as of April 30, ranking it No. 1 in the Morningstar intermediate-term bond category.

DoubleLine's Core Fixed Income Fund, which invests in various intermediate-term bonds, had net inflows of $172 million in April, compared with $86 million in March.

The fund, with $4.2 billion in total assets, had record net monthly inflows of $495 million in December.

Both Total Return and Core Fixed Income are open-end funds.

"Gundlach has high visibility because of his long-term track record with his performance and investment calls," said Todd Rosenbluth, director of ETF and mutual fund research at S&P Capital IQ.

The SPDR DoubleLine Total Return Tactical exchange-traded fund, introduced on Feb. 24, had $232.5 million in assets at the end of March. In April, the ETF's assets increased to $405 million.