The folks at a 2,000-employee, $457-billion-AUM*, multinational asset manager are celebrating a pair of milestones in their $35-billion-AUM** fixed income exchange-traded fund business.

Yesterday, John Kerschner, global head of securitized products at Janus Henderson Investors [profile], and Michael Schweitzer, head of the firm's North America client group, revealed that the Janus Henderson Securitized Income ETF (JSI on the NYSE Arca) recently surpassed $1 billion in AUM and that the Janus Henderson Mortgage-Backed Securities ETF (JMBS) recently crossed the $6-billion-AUM mark. Denver-based Janus Henderson Investors US LLC serves as investment advisor and administrator to both JSI (which is nearly two years old) and JMBS (which is almost seven).

JMBS' inception date was September 12, 2018, and its expense ratio is 22 basis points. The active ETF now has $6.04 billion in AUM***.

JSI's inception date was November 8, 2023, and it comes with an expense ratio of 49bps. The active ETF now has $1.04 billion in AUM***.

JSI' PM team includes co-portfolio managers Nick Childs and Kerschner. JMBS' PM team includes co-PMs Thomas Polus (who joined the PM team in May 2025), Kerschner, and Childs. Childs and Kerschner have PMed both funds since inception.

Kerschner highlights "the strong investor demand for high-quality securitized ETFs" and "the importance of active management in fixed income."

"Investors have been attracted to both JSI and JMBS's potential to offer high income with low credit risk while helping to diversify traditional fixed income portfolios," Kerschner states.

Schweitzer calls Janus Henderson "a pioneer in securitized ETFs" and puts the milestones in the context of the firm's "long-standing investment process that focuses on active asset allocation and fundamental research."

"We're able to offer access to the growing and complex securitized market to a broader, burgeoning investor base," Schweitzer states.

JMBS and JSI are each actively managed series of Janus Detroit Street Trust, and JSI is also non-diversified. The two ETFs' other service providers include:

SS&C's Alps Distributors, Inc. as distributor;

JPMorgan Chase Bank, N.A. as custodian, sub-administrator, securities lending agent, and transfer agent; and

PricewaterhouseCoopers LLP as independent accounting firm.

*As of June 30, 2025.

**As of August 1, 2025.

***As of yesterday (August 7, 2025). 

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