SoftBank Agrees to Acquire Robotics and AI Institute from Hyundai Motor Group

SoftBank Group Corp. has agreed to acquire the Robotics and AI Institute (RAI) from Hyundai Motor Group, a deal that would place one of the deepest physical artificial intelligence research organizations in the United States under the control of the Japanese technology conglomerate. The Robot Report reported on September 18, 2026 that financial terms of the transaction are unknown at this time. The agreement, which had been rumored for a couple of months, is now being reviewed by the Committee on Foreign Investment in the United States (CFIUS), the interagency panel that screens cross-border deals for national security impact. RAI is based in Cambridge, Massachusetts, while SoftBank is a Japanese tech conglomerate with a growing portfolio of robotics assets.

The institute occupies a unique place in the robotics world. Marc Raibert, who founded both Boston Dynamics Inc. and the RAI Institute, established the Cambridge lab in 2022 as part of Hyundai's acquisition of Boston Dynamics. Hyundai spun out the institute with an initial investment of more than $400 million, and that initial funding has ended, according to multiple sources. RAI's research spans robot control, perception, manipulation, navigation, and artificial intelligence to help robots perform complex physical tasks. Among its notable outputs, the institute developed the whole-body learning framework behind the acrobatic movements of Boston Dynamics' new Atlas humanoid robot.

The acquisition arrives alongside SoftBank's planned $5.3 billion acquisition of ABB's robotics business, a deal originally expected to close by mid-to-late 2026. Together, the two moves would give SoftBank control of both a mass-production robotics arm and a research engine designed to feed it new capabilities. Hyundai said in July 2026 that its shareholders were pursuing the acquisition of SoftBank's remaining 9.65% stake in Boston Dynamics after SoftBank exercised a put option, a move Hyundai said would strengthen collaboration with Boston Dynamics and support its broader physical AI strategy.

The historical connections between the parties run deep. Raibert founded Boston Dynamics in 1992 after pioneering dynamic-legged robotics at Carnegie Mellon and MIT, and led the Waltham, Massachusetts company through the development of BigDog, Atlas, and Spot. He stepped down as CEO in January 2020. Google acquired Boston Dynamics in 2013 and sold it to SoftBank four years later for a reported $100 million. Hyundai acquired a controlling stake in 2021 in a deal valuing Boston Dynamics at $1.1 billion, with SoftBank initially retaining a 20% stake. That shared history now frames a transaction that would return a Raibert-founded research organization to SoftBank's orbit.

Key Facts

The Robot Report reported on September 18, 2026 that SoftBank Group Corp. has agreed to acquire RAI from Hyundai Motor Group, with financial terms undisclosed and the deal now under CFIUS review. RAI is a research organization focused on robot control, perception, manipulation, navigation, and AI for complex physical tasks. It was founded in 2022 and received more than $400 million in initial funding from Hyundai. Korean reports put the combined investment by Hyundai Motor Company, Kia, and Hyundai Mobis at $424 million, with Boston Dynamics also joining through an equity investment.

Maeil Business Newspaper reported on June 19, 2026 that Hyundai Motor Group would buy SoftBank's remaining 9.65% stake in Boston Dynamics for $325 million and sell the RAI Institute to SoftBank for about $100 million. The Boston Dynamics stake purchase was executed under a put option at the price agreed when the contract was signed. As of the end of last year, Chung Eui-sun held a 22.6% stake in Boston Dynamics, Hyundai Motor Company owned 28%, Kia 17.2%, Hyundai Mobis 11.3%, and Hyundai Glovis 11.25%, with SoftBank holding the remaining 9.65%. Hyundai said in July 2026 that its shareholders were pursuing the acquisition of that stake to make Boston Dynamics a wholly owned subsidiary.

SoftBank's broader robotics strategy includes a $5.375 billion ($5.4 billion) purchase of ABB's robotics business, announced on October 8, 2025 and expected to close in mid-to-late 2026. The Robotics Media reported on September 18, 2026 that the RAI deal marks the second major robotics acquisition SoftBank has agreed to in twelve months. RAI slots on top of stakes SoftBank has already accumulated in Boston Dynamics, AutoStore, and a growing list of humanoid robot companies, giving Masayoshi Son's group control of both a mass-production robotics arm and a research engine.

Under Raibert's leadership, RAI has published widely on Spot, unveiled the multi-finger juggling platform AthenaZero and an Ultra Mobility Vehicle for parkour-style locomotion, and set up joint appointments with ETH Zurich under Marco Hutter. The institute was set up as a not-for-profit-style research house that would work alongside, but not inside, Boston Dynamics, with an explicit brief to attack the hardest problems in dexterous manipulation, learning-based control, and physical foundation models. Raibert is expected to remain executive director after the acquisition.

Analysis

The bigger picture here is that SoftBank is assembling a vertically integrated physical AI stack that few competitors can match. By adding RAI to its existing holdings, SoftBank would own a research engine that generates new capabilities in learning-based control and manipulation, an industrial automation business in ABB Robotics that can scale those capabilities into mass production, and a stake in Boston Dynamics that provides a proving ground for humanoid and legged robots. The combination of a not-for-profit-style research lab with commercial robotics assets is unusual, and it raises questions about how RAI's open publication culture will survive inside a conglomerate.

RobotToday reported on September 18, 2026 that SoftBank's ongoing plans to acquire ABB's robotics business for $5.3 billion could create synergies between ABB's industrial automation expertise and RAI's AI research, potentially reshaping the robotics landscape in the coming years. That logic is straightforward: RAI's work on physical foundation models and dexterous manipulation could eventually be commercialized through ABB's manufacturing and logistics channels, while Boston Dynamics provides a high-profile platform for demonstrating new capabilities. The risk is that research priorities shift toward near-term commercialization at the expense of the long-horizon science that made RAI attractive in the first place.

The CFIUS review adds a layer of uncertainty. The Robotics Media reported on September 18, 2026 that the transaction will pass through a CFIUS review expected to focus on RAI's data holdings, publication rights, and its links to Boston Dynamics-derived hardware. Analysts expect the deal to clear given SoftBank's existing US regulatory footprint, but behavioral remedies could reshape how the institute publishes and shares data. What this really means is that the most consequential part of the deal may not be the purchase price, which remains undisclosed, but the conditions that CFIUS attaches to RAI's operations. If the review imposes restrictions on data sharing or publication, RAI's role as an open research house could be curtailed, affecting its relationships with US universities and its ability to attract top researchers.

Why It Matters

The deal matters because it concentrates control of critical physical AI research in the hands of a single foreign conglomerate, at a time when the United States is increasingly scrutinizing foreign investment in sensitive technologies. CFIUS has broad authority to block or condition transactions, and a research institute with ties to US universities and industry could attract close attention. The outcome will set a precedent for how open research organizations are treated when they are acquired by foreign buyers.

For the robotics industry, SoftBank's growing stack could accelerate the development of general-purpose robots. RAI's work on whole-body learning, manipulation, and navigation is directly relevant to the humanoid robot race, and combining that with ABB's industrial automation expertise and Boston Dynamics' hardware could produce faster iteration cycles. Competitors may face a better-funded and more integrated rival. The Robotics Media noted that RAI slots on top of stakes SoftBank has already accumulated in Boston Dynamics, AutoStore, and a growing list of humanoid names, giving Masayoshi Son's group control of both a mass-production robotics arm and a research engine designed to feed it new capabilities.

There is also a talent dimension. RAI has attracted researchers through joint appointments with ETH Zurich under Marco Hutter, and its publication record on Spot and platforms like AthenaZero has made it a magnet for specialists in robot learning. If the acquisition leads to tighter control over publishing, that pipeline could weaken. Conversely, if SoftBank invests in the institute and preserves its research culture, RAI could become the intellectual core of a new robotics powerhouse. Hyundai's decision to sell RAI and buy out SoftBank's Boston Dynamics stake also simplifies its own portfolio and focuses it on commercializing the Atlas humanoid, with a planned listing on Nasdaq. The next few months of CFIUS review will reveal which path is more likely.

Next Up

The immediate next step is the CFIUS review. No further timeline was disclosed at the time of publication, according to RobotToday. The outcome of that review will be crucial for the acquisition's progression. Separately, SoftBank's $5.3 billion acquisition of ABB's robotics business is expected to close by mid-to-late 2026, and Hyundai's purchase of SoftBank's remaining 9.65% Boston Dynamics stake is also in motion.

Watch for behavioral remedies from CFIUS that could address data holdings and publication rights, as well as any statements from Raibert or SoftBank about RAI's future structure. The deal's completion would mark the second major robotics acquisition by SoftBank in twelve months and could reshape the competitive landscape for physical AI.