Riso Kagaku completes treasury stock acquisition program

Riso Kagaku Corporation announced the completion of its treasury stock acquisition program, effective December 12, 2025. The company acquired 228,800 shares of common stock between December 1 and December 12, 2025, for a total cost of JPY 286,447,600 through market purchases on the Tokyo Stock Exchange.

This acquisition concludes the program initiated by a board resolution on November 5, 2025, which authorized the repurchase of up to 470,000 shares of common stock, totaling a maximum of JPY 500,000,000. The authorized purchase period was from November 19 to December 23, 2025.

Cumulatively, Riso Kagaku repurchased 403,800 shares under this resolution, amounting to JPY 499,892,600, as of December 12, 2025.