SoftBank Group to Invest an Additional $30 Billion in OpenAI, Bringing Total to $64.6 Billion

SoftBank Group announced on February 27, 2026, that it had signed a definitive agreement to invest an additional $30 billion (about ¥4.6743 trillion) in an OpenAI funding round through SoftBank Vision Fund 2. The investment will be made in three installments of $10 billion each in April, July and October 2026. After completion, SoftBank Group’s total investment is expected to reach $64.6 billion, giving it an approximately 13% stake.

The key point is that SoftBank Group plans to make the massive investment in three installments—in April, July and October 2026—subject to customary closing conditions, rather than paying it all at once. The company also said it initially plans to fund the payment with bridge financing and similar measures, then shift to using its assets and various financing options. It said its existing leverage and cash-on-hand policies would remain unchanged, offering insight into how it plans to balance expanding its investment with managing its finances.