Amazon is in talks to buy stake in AI truck-driving startup Plus has placed an order for 1,000 autonomous driving systems from self-driving truck technology startup Plus and is in talks to buy a stake of as much as 20%, according to a person familiar with the matter.

The deal would give Amazon the right to buy preferred shares of Plus via a warrant at a price of $0.46647 per share, the person said, asking not to be named because the matter is private. That would amount to a 20% stake based on Plus’s shares outstanding before its planned merger with special purpose acquisition company Hennessy Capital Investment. V. A company filing to the U.S. Securities and Exchange Commission confirmed Bloomberg’s report.

The Sequoia Capital China-backed company, which is developing autonomous driving technology for long-haul trucking, is set to have a valuation of $3.3 billion, adding $500 million in proceeds to accelerate its expansion, the company said in a statement in May. The company raised $150 million via so-called private investment in public equity, or PIPE, from funds including BlackRock. and D.E. Shaw.

Plus declined to comment via an emailed statement. A representative for Amazon said the company couldn’t immediately comment.

Cupertino, California-based Plus is among a handful of startups trying to up-end a fragmented long-haul trucking business with driverless technology. It has been working with Chinese delivery company SF Holding, which uses Plus-enabled trucks that can cover 1,500 kilometers (932 miles) a day, Plus said in April. State-owned China FAW. plans to start mass production of jointly-developed autonomous trucks this quarter, Plus has said.

The Hennessy SPAC raised $345 million in a January initial public offering. Chief Executive Officer Daniel J. Hennessy previously led blank-check firms that completed deals to form companies including electric-vehicle developer Canoo, Blue Bird, which makes school buses, and Texas-based transportation and logistics firm Daseke.

Founded by a group of Stanford University classmates in 2016, Plus is backed by investors including Shanghai Automotive Industry, GSR Ventures Management and a Chinese long-haul company known in English as Full Truck Alliance. It also has a partnership with European truckmaker Iveco SpA and is working with Cummins on using autonomous technology in trucks powered by natural gas.

Plus raised $200 million in a funding round in February that attracted new investors such as Guotai Junan International Holdings and Citic Private Equity Funds Management. It raised an additional $220 million from investors co-led by FountainVest Partners and ClearVue Partners in March.

It began delivering its automated driving system PlusDrive to some customers in the U.S. and China this year.

The company recently hired Dennis Mooney from Navistar International and Chuck Joseph from to help scale up production and promote the adoption of Plus technology