Acquisition of Multiplex Global Limited, a Company Operating Construction Businesses in Australia, the UK and Canada

June 18, 2026

Company Profile

OBAYASHI CORPORATION (Head Office: Minato-ku, Tokyo; President: Toshimi Sato) hereby announces that it has decided to make Multiplex Global Limited ('Multiplex'), a company operating construction businesses in Australia, the United Kingdom and Canada, a subsidiary.

Quay Quarter Tower in Sydney Constructed by Multiplex

The Obayashi Group has defined the direction of its sustainable growth strategy as establishing a Group-wide business structure centered on the domestic construction business, in which businesses other than domestic construction generate performance equal to or greater than that of the domestic construction business. The Group aims to build a future business structure to achieve this goal.

The Obayashi Group has been expanding its overseas construction business, particularly in North America and Southeast Asia, where market growth is expected. In addition, the Group has been exploring opportunities to enter and expand into stable and high-growth markets. Australia has been identified as one of the most important markets, supported by population growth, urban development demand, and stable economic conditions.

Multiplex is one of the leading Tier 1 construction companies in Australia, with a strong reputation for delivering high value-added projects, including high-rise buildings, hospitals, and data centers, and maintains a substantial order backlog. In the United Kingdom, particularly in London, it has an established track record in office and mixed-use developments, and it has built a strong competitive position. Also, given the steady growth in Canada, further business expansion is expected in the future.

Following discussions regarding a strategic partnership with Multiplex, with whom Obayashi Corporation previously collaborated on the main stadium for the Sydney Olympic Games, Obayashi Corporation has decided to acquire the shares of its parent holding company and make Multiplex a consolidated subsidiary.

Going forward, the Obayashi Group will leverage its management resources to support the further growth of Multiplex and enhance competitiveness across its global markets. Through this acquisition, the Obayashi Group will accelerate full-scale expansion into the Australian and UK construction markets and further strengthen its business foundation in Canada.

• *1　Multiplex is a company established as a result of the restructuring of Multiplex's business operations by its current parent company. It operates construction businesses through its wholly owned subsidiaries in various countries and regions. The Australian entity that served as the predecessor to Multiplex was established in 1962 and has been engaged in construction business, primarily in Australia, for over 60 years.
• *2　The Company plans to transfer the operations of certain countries and regions--where business activities are currently largely dormant--to the existing parent company prior to their conversion into subsidiaries. Consequently, the figures stated in this section differ from the scope of the acquisition by the Company.

Sydney Fish Market (Tourism & Leisure facility in Sydney) New Footscray Hospital (Health, Aged Care & Pharmaceutical facility in Melbourne) Western Sydney International Airport Terminal (Tourism & Leisure facility in Sydney) ECU City Campus (Education & Research facility in Perth) 30 Grosvenor Square (Tourism & Leisure facility in London) Etobicoke Civic Centre Precinct (Justice, Civic & Community facility in Ontario) Projects Undertaken by Multiplex in Sydney

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