Sprott Asset Management has filed to launch a physical platinum and palladium exchange traded fund, adding to its stable of precious metals ETFs.

The Canadian firm manages Sprott Physical Gold Trust (NYSEArca: PHYS) and Sprott Physical Silver Trust (NYSEArca: PSLV), which are listed on the New York Stock Exchange.

The funds are different from other precious metal ETFs in that investors can redeem large blocks of shares for physical delivery of the bullion. However, the closed-end funds can trade at premiums or discounts to net asset value. [Sprott Physical Silver Trust Trades at Premium]

For example, Sprott Physical Silver Trust is trading at a premium of more than 20% to NAV, according to the company’s website.

The silver fund holds nearly $700 million while Sprott Physical Gold Trust has over $2 billion.

The new ETF will invest in platinum and palladium bullion. The proposed value of the ETF is $115 million, according to the Sprott filing, while the management fee will total 0.5%.