Shares of Joby Aviation (JOBY) popped over 25% on Wednesday after the commercial air taxi developer said it closed a $250 million investment from Toyota Motor (TM).

The funds represent the first tranche of a previously announced $500 million investment from Toyota, intended to support the production of Joby’s electric vertical takeoff and landing aircraft. Wednesday’s significant share gain brought Joby’s stock back into positive territory for the first tꦺime since late January. 

“We’re already seeing the benefit of working with Toyota in streamlining manufacturing processes and optiไmizing design,” Joby CEO JoeBen Be♛virt said.

Earlier this month, Joby announced that it flew two of its air taxis simultaneously during a test flight. The Santa Cruz, California-based company has partnered with Delta Air Lines (DAL) and Uber Technologies (UBER) to bring the aircraft to the U.S. and is targeting New York and Los Angeles as launch markets, pending certification from the Federal Aviation Administration.  

Recently Wednesday, Joby stock had gained 29%✱ to $8.90.