Sumitomo Mitsui Trust : Notice regarding Establishment of “Alterna Trust,” a New Company that Specializes in Digital Securities by our subsidiary

Sumitomo Mitsui Trust Group, Inc.

Notice regarding Establishment of “Alterna Trust,” a New Company that Specializes in Digital Securities by our subsidiary

Please be informed that Sumitomo Mitsui Trust Bank, Limited, a subsidiary of Sumitomo Mitsui Trust Group, Inc. today announced the attached press release.

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For further information, please contact:
Investor & Shareholder Relations Department, Sumitomo Mitsui Trust Group, Inc.
Telephone	: [phone]

Sumitomo Mitsui Trust Bank, Ltd. Mitsui & Co. Digital Asset Management, Ltd.

Establishment of “Alterna Trust,” a New Company that Specializes in Digital Securities

-Enable asset owners to raise capital and accelerate the spread of investment in alternative assets by capitalizing on a trust that connects real assets with individual investors and digital securitization using AI -

Sumitomo Mitsui Trust Bank, Ltd. (President and CEO: Kazuya Oyama, hereinafter “SuMiTB”) and Mitsui & Co. Digital Asset Management, Ltd. (President and CEO: Takashi Ueno, hereinafter “MDM”) are pleased to announce the establishment of a joint venture, “Alterna Trust Co., Ltd.” (hereinafter “Alterna Trust”), a trust company specializing in digital securities, in anticipation of further development of the digital securities market.

Alterna Trust is a trust company specializing in the administration of a trust with certificates of beneficial interest, which plays a crucial role in the issuance of digital securities (ST: Security Token (*1)). Alterna Trust was established to contribute to the development of the digital securities market by integrating MDM's digital technologies dedicated to a financial area with SuMiTB's expertise in asset administration/fiduciary services and providing efficient and swift trust administration services. Alterna Trust will collaborate closely with asset management companies, securities firms, and others as a trustee in a scheme to issue digital securities and promote the formation of digital securities.

Since its foundation in 2020, MDM has led a business in Japan that offers a new investment option other than deposits or equities by integrating the acquisition of/ investment in alternative assets such as real estate with the sale of digital securities backed by them. MDM has developed “ALTERNA (*2),” an asset management platform tailored for individual investors, by actively using digital technologies, including AI, and has strived to streamline its business operations by automating a procedure to prepare contracts, etc. MDM has launched five funds through external securities companies and twelve funds through its own service “ALTERNA” since it formed the first fund in December 2021. MDM provides the greatest number of alternative asset funds (*3) in Japan, and the total assets under management, including funds raised from individual investors, has exceeded 200 billion yen (*4).

Meanwhile, SuMi TRUST Group upholds its Purpose, “Trust for a flourishing future” and is working on the field of digital securities by leveraging its specialized trust function to realize a virtuous circulation of funds, assets, and capital.

1 Electronically Recorded Transferable Rights to be indicated on securities, etc.

2 ALTERNA：https://alterna-z.com/(Japanese text only)

3 As of June 2025/ Survey by MDM/ The figure includes those of funds that are collecting funds.

4 As of June 2025

Alterna Trust combines MDM's expertise to offer digital securities, including AI and other digital technologies focused on the financial area, with SuMiTB's advanced expertise in trust to make a securitization process more flexible and faster while reducing time-consuming administrative process. By doing so, companies that hold alternative assets, such as real estate, will be able to raise funds more easily from individual investors. Alterna Trust also plans to offer a one-stop service to its clients based on their needs by combining its trust function with MDM's securities and investment functions.

Furthermore, MDM and SuMiTB have entered into a business alliance with the aim of stimulating the digital securities market. The two companies will work together to further expand the digital securities market

and contribute to the government’s “Policy for Promoting Japan as a Leading Asset Management Center” through this collaboration.

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The two companies will have discussions on a case-by-case basis and work on initiatives necessary to achieve their objectives based on the agreement to proceed with the following items.

1. Joint management, Collaboration

   • Launch Alterna Trust and manage it together

   • Send experts and share know-how to strengthen the management systems

2. Formation of investment products, Supplying assets, Financing

   • The two companies shall form products utilizing ALTERNA and make joint proposals.

   • SuMiTB shall introduce assets, including claims held or sourced by the bank.

   • SuMiTB shall provide funds to MDM and the latter shall use the former’s sales network.

Alterna Trust is currently working on multiple projects, including the launch of its first fund, and plans to announce them sequentially from now on.

The company aims to form digital securities totaling 100 billion yen in the first year and sets its 5-year goal of cumulative assets under management at 1 trillion yen. Alterna Trust will initially focus on real estate, but incorporate various asset classes, such as alternative assets other than real estate, corporate bonds, claims held by SuMiTB, etc. in due course. Alterna Trust will also accept an increasing number of trusts from asset management companies other than MDM.

Company name	Alterna Trust Co., Ltd.
Address	Ningyo-cho PREX 3F, 1-9-8 Nihonbashi Horidome-cho, Chuo-ku, Tokyo
Reprensentative	President and CEO: Shosaku Ikeda
Service	Trust business focused on digital securities
Capital, including capital reserves	665 million yen
Investment ratio	MDM：85.1%, SuMiTB：14.9%

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