• Rivian Automotive and Volkswagen Group said the size of their joint venture has increased to up to $5.8 billion.
• The automakers also said the first VW models to use Rivian's software and electrical architecture are set to arrive as early as 2027.

Volkswagen Group has increased its planned investment in an announced joint venture with electric vehicle maker Rivian Automotive ahead of the operations launching Wednesday.

The companies in a joint press release Tuesday said the size of the deal is now up to $5.8 billion — an increase from an initial investment of up to $5 billion — with the first VW models to use Rivian's software and electrical architecture arriving as early as 2027.

Shares of Rivian were up by more than 6% during after-hours trading.

The increase in investment was a result of the companies pulling ahead some potential future capital from VW, as well as changes in the deal's structure, including in equity investment, officials said Tuesday during an investor call.

VW Group CEO Oliver Blume during a press conference Tuesday said the German automaker expects to use Rivian's technologies across a wide range of price points, international markets and brands.

The integration of Rivian's software is expected to start with the Volkswagen brand, followed by Audi as well as VW's forthcoming Scout brand, Blume said. He also mentioned "sports cars" could be included but did not specify which brand. VW's brands also include Bentley, Porsche and Lamborghini, among others.

"We're thrilled to see our technology being integrated in vehicles outside of Rivian, and we're excited for the future," Rivian CEO RJ Scaringe said in a statement.

Both Scaringe and Blume said any further plans such as battery modules, joint production of vehicles or sharing other hardware components would need to be in addition to the announced joint venture deal.

The name of the joint venture, which was expected to close during the fourth quarter, is Rivian and VW Group Technology, LLC.

VW has already made an initial investment of $1 billion in the form of a convertible note, the companies said. At the closing of the joint venture, VW will invest about $1.3 billion "as consideration for background IP licenses and a 50% equity stake in the joint venture."

The remaining investment of up to $3.5 billion is expected to come by 2027 "in the form of equity, convertible notes, and debt at future dates and based on clearly defined milestones," according to the companies.

The joint venture deal was initially announced in June and came as Rivian sought to raise additional capital as it launches its redesigned models and prepares for production of new "R2" vehicles in early 2026.

Scaringe previously said the capital from VW is expected to carry the company through the production ramp-up of its smaller R2 SUVs at its plant in Normal, Illinois, starting in 2026, as well as production of a midsize EV platform at a plant in Georgia, where Rivian paused construction earlier this year.

The joint venture will be headed by Rivian Chief Software Officer Wassym Bensaid and VW Group Chief Technical Engineer Carsten Helbing.

The companies said developers and software engineers from both companies will join the joint venture. Teams will be based initially in Palo Alto, California, and three other sites are in development in North America and Europe.