Sprint, which Son loaded up with debt and made repeated attempts to merge with T-Mobile before successfully closing the deal in April, has delivered an internal rate of return of 25%, Son said.
SoftBank has undertaken a complex transaction to divest part of its T-Mobile stake to raise $20 billion. That brings the total from an asset sale programme, which includes monetisation of stakes in Alibaba and wireless carrier SoftBank Corp, to $35 billion or 80% of the planned total, Son said.
Those funds are being allocated to share buybacks and to increase SoftBank's financial leeway after the group was hit with a record annual loss in the year ended March as Son's tech investments faltered.