MEC COMPANY LTD. announced that at the Board of Directors' meeting held on May 10, 2024, the Company decided to make changes to the details regarding (Progress of Disclosures) Progress of the new domestic base Kitakyushu Plant (tentative name) announced on September 22, 2023. Reason for change: The Company's product technology is used in the manufacturing process for electronic substrates and components, and especially have acquired a large share of the global market for a portion of the manufacturing processes for package substrates that mount semiconductors in particular. As the semiconductor and digital industries continue to expand and develop, in order to fulfill its responsibility supplying customers and secure production capacity in anticipation of future business expansion, will be increasing production capacity at existing factories as well as make preparations for the construction of a new factory.

Under these circumstances and with a focus on medium- to long-term strategy, the Company has decided to change the start date for construction, start date for operation, and total investment amount in order to implement changes to the design that are more in line with the market environment and technological trends in which the Company is concerned. Outline of business plan: Name: MEC COMPANY LTD. Kitakyushu Plant (tentative name). Location: 10 Koyomachi, Wakamatsu-ku, Kitakyushu City, Fukuoka Prefecture.

Site area: 29,889 m2. Start of construction: August 2024 (planned). Total investment: Approx.

JPY 4.7 billion (including land acquisition costs). Investment plan: Own funds and debt financing (planned). Production capacity: Approx.

30,000 t/year (planned). Number of newly hired employees: 10 to 20 (planned). Commencement of operations: October 2025 (planned).

Details of change: Start of construction: (Before) April 2024 (planned) (After) August 2024 (planned). Total investment: (Before) Approx. JPY 4 billion (including land acquisition costs).

(After) Approx. JPY 4.7 billion (including land acquisition costs). Commencement of operations: (Before) July 2025 (planned) (After) October 2025 (planned).