TuSimple co-founder and CTO Xiaodi Hou. Photo credit: Harry Murphy/Web Summit via Sportsfile, under Creative Commons license

Self-driving truck startup TuSimple is seeking up to $250 million in new funding and has hired investment bank Morgan Stanley to help it raise that amount, as first reported by TechCrunch. Morgan Stanley is said to have sent out informational packets to potential investors in a bid to seek funding for TuSimple. Already, TuSimple has raised about $300 million in total funding but happens to be seeking more. The San Diego-based company last raised funding in September of last year.

TuSimple was founded in 2015, at a time when most of the self-driving industry was focused on passenger cars rather than big trucks. The company has managed to secure significant funding and attention since then, with backers including UPS, CDH Investments, and China’s Sina Corp. Although based out of San Diego, TuSimple currently tests on public roads in the state of Arizona and also in Shanghai, China. The company is aiming to make a dent in the $800 billion U.S. trucking industry.

As of its last funding, TuSimple was valued at more than $1 billion, making it one of several “unicorns” in the self-driving industry. The company’s fundraising chase notably comes on the heels of a seemingly big ($1 billion+) exit for another self-driving startup, Zoox. Zoox, however, had raised nearly $1 billion in funding as a private company, implying a break-even for the company’s investors at a $1 billion-range acquisition price.