SoftBank completes $40 billion OpenAI investment, securing 11% stake in ChatGPT maker

Reviewed byNidhi Govil

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SoftBank has finalized its $40 billion investment in OpenAI, marking one of the largest private technology investments ever. The Japanese conglomerate sent a final $22.5 billion last week, bringing its total stake to 11% in the ChatGPT maker. The funding supports OpenAI's artificial intelligence infrastructure ambitions, including the $500 billion Stargate project.

SoftBank Finalizes Historic $40 Billion Investment in OpenAI

SoftBank has completed its massive $40 billion investment in OpenAI, cementing one of the largest private technology investments in history. The Japanese conglomerate sent a final tranche of $22.5 billion last week, following earlier disbursements of $8 billion and a syndicated $10 billion

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. The total investment actually reached $41 billion, including $30 billion from SoftBank's Vision Fund and $11 billion from third-party co-investors

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. This positions SoftBank as OpenAI's second-largest investor with an 11% stake, trailing only Microsoft's 27.5% ownership

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Source: New York Post

Source: New York Post

Masayoshi Son Doubles Down on Artificial Intelligence

Under founder and CEO Masayoshi Son, SoftBank has pivoted aggressively toward artificial intelligence and related infrastructure. "We are deeply aligned with OpenAI's vision of ensuring AGI benefits all of humanity," Son stated, referring to artificial general intelligence—the theoretical next stage where computers could outperform humans across diverse tasks

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. Sam Altman, OpenAI's chief executive, praised the partnership: "SoftBank saw the potential of AI early and committed with a deep belief in its impact on humanity. Their global leadership and scale help us move faster and bring advanced intelligence to the world"

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. The investment was announced in early 2025 at a $260 billion pre-money valuation, with funding structured to be paid out over 12 to 24 months

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Source: ET

Source: ET

Stargate Project and Artificial Intelligence Infrastructure Ambitions

A significant portion of the SoftBank OpenAI investment will support the Stargate project, a $500 billion initiative to build artificial intelligence infrastructure across the United States. Announced by President Donald Trump in January 2025, the venture brings together SoftBank, OpenAI, and Oracle to deploy 10 gigawatts of computing capacity by 2029

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. SB Energy, a SoftBank unit developing renewable energy installations, is also supporting the effort

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. This week, SoftBank further expanded its infrastructure footprint by acquiring DigitalBridge Group for approximately $4 billion. DigitalBridge's portfolio includes Vantage Data Centers, which is helping OpenAI construct a Stargate data center campus in Wisconsin

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Financial Maneuvering Behind the Deal

To finance the $40 billion investment, SoftBank undertook significant financial restructuring. The company sold a $5.8 billion stake in Nvidia and $4.8 billion worth of T-Mobile US stock. Additionally, it secured an $11.5 billion loan against its Arm Holdings shares

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. The final cash infusion was contingent on a major organizational overhaul at OpenAI, which transformed from a nonprofit with a for-profit arm into a standalone public benefit corporation

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Soaring OpenAI Valuation Signals Potential Returns

The timing of SoftBank's investment could prove lucrative. When the deal was signed in March at a $300 billion valuation, OpenAI was already valued highly. A recent $6.6 billion secondary sale boosted the OpenAI valuation to $500 billion

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. Sources indicate OpenAI is negotiating another funding round at an even higher valuation and may pursue an initial public offering in 2027, potentially selling at least $60 billion worth of stock at up to a $1 trillion valuation

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. This trajectory suggests SoftBank could realize substantial returns on what represents one of the boldest bets in the ChatGPT maker's rapid ascent. For AI developers and infrastructure providers, the deal underscores the massive capital flowing into the sector and signals continued consolidation around dominant players with proven capabilities.

Source: SiliconANGLE

Source: SiliconANGLE

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