WM Partners Announces Transfer of Shares in Sonora Technology Co., Ltd.

WM Partners Co., Ltd. (hereinafter "the Company") is pleased to announce that the WM Growth No. 4 Investment Limited Partnership, managed and operated by the Company, has agreed to transfer its shares in Sonora Technology Co., Ltd. (hereinafter "Sonora Technology") to Hibino Corporation (Minato-ku, Tokyo; hereinafter "Hibino"). The execution of the share transfer is scheduled for May 29, 2026.

Sonora Technology is a fabless manufacturer that produces and sells anechoic chambers and boxes for acoustic measurement/development, as well as soundproof rooms and covers for industrial noise control. Since its founding in 2003, it has accumulated an extensive track record of deliveries mainly to major private companies both in Japan and overseas. In particular, it has established a solid position as a niche top manufacturer in the categories of its mainstay products, "modular anechoic chambers" and "anechoic boxes."

Hibino, with the purpose of "Creating emotion in the world with sound and video," provides products, goods, and services centered on audio and visual technology. In recent years, while accelerating global expansion through M&A in Asia, it has also been promoting M&A in Japan targeting companies that can expect synergies with existing areas such as video business and rental services, thereby strengthening its ability to provide total solutions.

The Company is confident that Hibino is the best partner for the future development of Sonora Technology and looks forward to further growth and breakthroughs through the co-creation of both companies after this transaction.

[Overview of Sonora Technology Co., Ltd.] Company Name: Sonora Technology Co., Ltd. Headquarters: Verte-Bldg 2F, 2-40-5 Seijo, Setagaya-ku, Tokyo Founder/Chairman: Yusuke Aoki; President & CEO: Shinya Suzuki Capital: 44.8 million yen Business: Industrial soundproofing, acoustic measurement, architectural acoustics Website: https://www.soundenvironment.jp/

About WM Partners: WM Partners is an independent investment firm established in 2013, consisting of a team of investment professionals with over 10 years of experience in the private equity industry and various business backgrounds. Since its establishment, it has worked on providing optimal capital and management support according to growth stages. As a pioneer of growth capital investment in Japan, it holds a unique investment strategy under the concept of "Growth-Buyout."