SoftBank Group Corp. shares rose the most since June after it bought about $7.6 billion worth of T-Mobile US Inc. stock as part of an agreement to merge the wireless carrier with rival Sprint Corp. in 2020.

The investment firm’s shares rose 7 percent in Tokyo. SoftBank said Tuesday it will receive 48,751,557 shares of T-Mobile US at no additional cost after the shares meet terms agreed during a landmark deal with SoftBank-owned Sprint.

Under the terms of the agreement, the Japanese investment firm will receive T-Mobile shares if their 45-day VWAP – a measure of stock valuation – equals or exceeds $150 at any time from the second anniversary of the deal through the end of 2025.

The stock infusion would likely improve SoftBank’s balance sheet, as well as potentially raise new capital.

The merger between Sprint and T-Mobile was one of the largest deals in the industry, valued at about $37 billion. SoftBank is gradually raising capital and increasing the pace of investment this year, expecting market conditions to improve in 2024. Masayoshi Son is looking to bet on artificial intelligence and autonomous driving in an attempt to repair the company’s reputation after a series of high-profile misses in previous years.