Stock prices soared 48 times before the founder retired! Bain Capital liquidates its holdings in Kaxia Holdings, making a profit fortune in the epic AI private equity.

Note that Bain Capital has sold all of its shares in the flash memory chip manufacturer Kaxia, bringing an end to a transaction that changed the landscape of technology and investment in Japan. David Gross, managing partner at Bain, said in an interview, "We no longer hold shares in Kaxia." As a frenzy of global spending in the field of artificial intelligence drove Kaxia's stock price up by over 4800% since its initial public offering and elevated the chip maker as one of Japan's most valuable companies, the American private equity firm recorded record profits. "This has been a spectacular operation for all parties involved," Gross said. Fueled by the widespread adoption of artificial intelligence applications driving demand for memory and data storage, Kaxia's stock price soared by as much as 11% on Thursday. Bain's exit came after months of divestment - its stake decreased from around 44% in December to about 14% in mid-June, when the shares were valued at around $36 billion. In 2018, Bain led a consortium, including SK Hynix, to acquire Toshiba's former memory business for $18 billion. Kaxia's stock achieved historic returns Ikuo Mitsui, fund manager at Lanza Securities, said, "The fact that such a large amount of stock could be sold indicates there were buyers in the market, including overseas institutional investors," adding that Bain's divestment eliminated a drag on Kaxia's stock price as the market no longer needed to factor in the risk of Bain selling shares. The stock sale comes as investors seek to find reasonable justifications for the sky-high valuations surrounding artificial intelligence. Semiconductor stocks globally have surged to record levels this year, but concerns about intensifying competition, potential oversupply, and the ability of investments worth billions of dollars to generate returns have created volatility in the market. Andrew Jackson, head of stock strategy at Otus Advisors in Japan, said, "Overall, this is a good thing, not a sign that we've peaked. It's such an amazing deal." For years, Kaxia has struggled through one of the memory industry's worst downturns. But since going public in 2024, riding on uncontrollable demand for AI memory chips, Kaxia's stock price has skyrocketed, making it one of the best-performing stocks in the MSCI Global Index. Although Kaxia's stock has dropped about 30% from its peak in June, the company's turnaround is likely to be one of the greatest success stories in the private equity investment industry. When Toshiba sold off its chip business, it was to help repair its balance sheet, which had been severely damaged by losses from ventures into nuclear energy and a long-running accounting scandal. Gross stated that this deal will free Kaxia from its parent company's woes and allow it to invest in production capacity and technology when needed, paving the way for Japan's participation in the ongoing global AI competition. "It's a gem in the crown, one of the top technology-driven companies and conglomerates under the Toshiba group, with a remarkable history," he said, adding that the commitment of turning around companies provides additional credibility, "taking over companies that may be facing some difficulties and putting them on a growth path." Bain is currently preparing to utilize the $10.5 billion it recently raised for its latest Asia-focused fund. Gross said most of this funding will be invested in Japan. The company, managing around $225 billion in assets, opened its Japan office 20 years ago and has since become one of the country's most active private equity investors. Leveraged buyout deals are thriving due to cheap financing, a weak yen, and reforms driving privatizations and asset divestitures. Bain Capital leads in private equity transactions in Japan After leading the market with transactions worth around $10 billion in 2025, Bain announced that it had completed nearly $3 billion worth of transactions in Japan by mid-June this year. Gross said the total transactions for this year could reach similar levels, adding that the company has around 100 employees in Japan and is open to increasing its workforce. Gross stated that Japan offers investment opportunities in areas such as healthcare and digital infrastructure, with its chip-related businesses including semiconductor equipment, energy systems for data centers, software, and applications. But none of these opportunities compare to Kaxia. "In Japan, there is actually only this one truly large memory company," he said.