The following English translation is for reference purposes only, as it was originally prepared and published by the Company in Japanese and is qualified in its entirety by the original Japanese version submitted to the Tokyo Stock Exchange. Please refer to the Japanese version in the event of any discrepancy between the English and Japanese versions. January 12, 2022 Company Name: Ateam Inc. Representative: Takao Hayashi, President (Code Number: 3662) Contact: Akinori Mitsuoka, Corporate Officer/IR Officer, General Manager of Corporate Development Division (Tel: +81-52-747-5573) Notice Regarding Transition to “Prime Market” in the Tokyo Stock Exchange New Market Segments Ateam Inc. (hereafter Ateam) hereby announces that it will transfer to the “Prime Market” from April 4, 2022, as per the selection results of the new market segments announced by the Tokyo Stock Exchange, Inc. on January 11, 2022. To gain the support of its shareholders, Ateam will continue to make an effort to achieve sustainable growth and enhance its corporate value over the medium to long term as well as constantly maintaining the level of governance required for “Prime Market”.