Rivian’s electric van is now available to be purchased by anyone with a commercial fleet, the automaker said today. For several years, Rivian’s van was exclusive to Amazon. Now, the platform on which the e-commerce giant based its delivery van is open to anyone with a fleet of commercial vehicles and some money to burn.

Shares of Rivian Automotive rose Monday after the company said it would start selling its all-electric delivery vans to other companies besides Amazon.com. Rivian shares were up 3.4% at $12.90 in midday trading on Monday,

Amazon helped fund the development of Rivian’s electric delivery van, and it asked for a four-year exclusivity agreement in exchange. The contract, which took effect in 2021, prevented Rivian from selling vans to a buyer other than Amazon.

If it gains traction, the commercial van could become a bigger source of revenue amid a broader slowdown in consumer EV uptake.