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TOSEI <8923> Shares Surge as Grantham Mayo Reveals Substantial Stake

Mon Apr 6, 2026 1:09 pm JST Catalyst

TOSEI CORPORATION <8923> extended its rally today, hitting an intraday high of \1,703, a 7.6% gain. A large shareholding report filed with the Kanto Local Finance Bureau on April 6 revealed that U.S.-based investment advisor Grantham, Mayo, Van Otterloo & Company (GMO) has emerged as a major shareholder with a 5.07% stake.

The reporting requirement was triggered on March 30. According to the filing, the investment purpose is for "portfolio investment, with the potential for making material proposals depending on circumstances." The disclosure has sparked speculative buying, as investors react to the involvement of the high-profile Boston-based firm.

Source: MINKABU PRESS

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