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Kenneth A. Siegel

Partner | Tokyo


Represents SoftBank in its pending sale of its 90% stake in Fortress, a global investment manager with over $45 billion in assets under management, to Mubadala.

Represents SoftBank in its pending $375 million acquisition of Berkshire Grey, Inc. (Nasdaq: BGRY), a robotic automation company, as well as interim financing through the completion of the merger.

Represented SoftBank Group Corp., Sprint’s controlling shareholder, on the landmark merger of Sprint and T-Mobile US, Inc. The total implied enterprise value for Sprint is approximately $59 billion and the aggregate implied enterprise value for the combined company in the all-stock transaction is approximately $146 billion.

Represented SoftBank in its £24.3 billion ($31.4 billion) acquisition of UK-based semiconductor and software design company ARM Holdings. The transaction was the largest-ever cross-border acquisition by a Japanese company (and the largest-ever cash acquisition of a UK company).

Represented SoftBank in its $21.6 billion acquisition of a 78% interest in U.S. wireless operator Sprint. The transaction was the largest U.S. M&A transaction of 2012 and, when announced, the largest cross-border acquisition by a Japanese company (now second to SoftBank’s acquisition of ARM Holdings in 2016).

Represents the board of Toshiba Corporation in its proposed $15 billion take-private transaction.

Represented Toshiba Corporation in the $18 billion sale of its wholly owned subsidiary Toshiba Memory Corporation to a consortium led by Bain Capital, the largest private equity deal ever undertaken in Asia.

Represented SoftBank in its $7.7 billion primary and secondary investment as part of a $9.3 billion sale of stock by Uber. This is the largest-ever private secondary transaction in the technology space.

Represented SoftBank, Alibaba’s largest shareholder, in Alibaba’s initial public offering of American Depository Shares on the New York Stock Exchange. The IPO was the largest-ever IPO on the NYSE, initially valuing Alibaba at $168 billion.

Represented SoftBank in the restructuring of Alibaba’s financial services businesses. The restructuring, undertaken in preparation for Alibaba’s IPO, secured and extended Alibaba’s long-term economic participation in Alipay and its broader financial services business.