“ GSOIH ”—GSO Intermediate Holdings Corporation, a Delaware corporation and a consolidated subsidiary of DCG. “ Incidental Rights ”—Rights to acquire, or otherwise establish dominion and control over, any virtual currency or other asset or right, which rights are incident to the Trust’s ownership of SUI and arise without any action of the Trust, or of the Sponsor or Trustee on behalf of the Trust. “ Index ”—The CoinDesk Sui Benchmark Rate. From the commencement of the Trust’s operations until December 19, 2025, the Index was the CoinDesk SUI Reference Rate Price. “ Index License Agreement ”—The license agreement, dated as of February 1, 2022, between the Index Provider and the Sponsor, governing the Sponsor’s use of the Index for calculation of the Index Price, as amended by Amendment No. 1 thereto and as the same may be amended from time to time. “ Index Price ”—The U.S. dollar value of a SUI derived from the Digital Asset Trading Platforms that are reflected in the Index, calculated at 4:00 p.m., New York time, on each business day. See “Business—Overview of the Sui Industry and Market—The Index and the Index Price” for a description of how the Index Price is calculated. For purposes of the Trust Agreement, the term Index Price shall mean the Index Price as defined herein. “ Index Provider ”—CoinDesk Indices, Inc., a Delaware corporation that publishes the Index. Prior to its sale to an unaffiliated third party on November 20, 2023, DCG was the indirect parent company of CoinDesk Indices, Inc. As a result, CoinDesk Indices, Inc. was an affiliate of the Sponsor and the Trust and was considered a related party of the Trust. “ In-Kind Order ”—An order for the creation or redemption of Shares pursuant to which the Authorized Participant (or its AP Designee) will deliver or receive SUI directly from the Trust’s Vault Balance. “ Investment Advisers Act ”—Investment Advisers Act of 1940, as amended. “ Investment Company Act ”—Investment Company Act of 1940, as amended. “ Investor ”—Any investor that has entered into a subscription agreement with an Authorized Participant, pursuant to which such Authorized Participant will act as agent for the investor. “ IRS ”—The U.S. Internal Revenue Service, a bureau of the U.S. Department of the Treasury. “ IR Virtual Currency ”—Any virtual currency tokens, or other asset or right, acquired by the Trust through the exercise (subject to the applicable provisions of the Trust Agreement) of any Incidental Right. “ Layer 2 ”—Protocols built on top of an underlying smart contract platform blockchain intended to provide scalability to the underlying blockchain by increasing transaction efficiency. “ Liquidity Engager ”—Grayscale Investments Sponsors, LLC, acting other than in its capacity as Sponsor, and in its capacity to engage one or more Liquidity Providers. “ Liquidity Provider ”— One or more eligible companies that facilitate the purchase and sale of SUI in connection with creations or redemptions pursuant to Cash Orders. The Liquidity Providers with which Grayscale Investments Sponsors, LLC, acting in its capacity as the Liquidity Engager, will engage in SUI transactions are third parties that are not affiliated with the Sponsor or the Trust and are not acting as agents of the Trust, the Sponsor, or any Authorized Participant, but may be affiliated with the Authorized Participant, and all transactions will be done on an arms-length basis. Except for the contractual relationships between each Liquidity Provider and Grayscale Investments Sponsors, LLC in its capacity as the Liquidity Engager, there is no contractual relationship between each Liquidity Provider and the Trust or the Sponsor. “ Liquidity Sleeve ”—The portion of SUI in the Trust intended to be maintained as unstaked, as determined by the Sponsor from time to time, and that meets the requirements set forth in Section 6.02(9) of IRS Revenue Procedure 2025-31. “ Management Reorganization ”—An internal corporate reorganization consummated on October 22, 2025. As a result of the Management Reorganization, Grayscale Investments is now the sole managing member of GSO, the sole member of the Sponsor, and the Board of Grayscale Investments is responsible for managing and directing the affairs of the Sponsor. “ Marketing Agent ”—Foreside Fund Services, LLC. “ Marketing Agent Agreement ”—An agreement entered into by the Sponsor, on behalf of the Trust, dated October 22, 2025, with Foreside Fund Services, LLC.
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