GSUI Prospectus

The Trust is not a registered investment company under the Investment Company Act and the Sponsor believes that the Trust is not required to register under the Investment Company Act. The Trust will not trade, buy, sell or hold SUI derivatives, including SUI futures contracts, on any futures exchange. The Trust is authorized solely to take immediate delivery of actual SUI. The Sponsor does not believe the Trust’s activities are required to be regulated by the CFTC under the CEA as a “commodity pool” under current law, regulation and interpretation. The Trust will not be operated by a CFTC-regulated commodity pool operator because it will not trade, buy, sell or hold SUI derivatives, including SUI futures contracts, on any futures exchange. Investors in the Trust will not receive the regulatory protections afforded to investors in regulated commodity pools, nor may the COMEX division of the New York Mercantile Exchange or any futures exchange enforce its rules with respect to the Trust’s activities. In addition, investors in the Trust will not benefit from the protections afforded to investors in SUI futures contracts on regulated futures exchanges. The Trust creates Shares from time to time but only in Baskets. A Basket equals a block of 10,000 Shares. The number of outstanding Shares is expected to increase from time to time as a result of the creation of Baskets. The creation of Baskets will require the delivery to the Trust of the amount of SUI (or cash to acquire the amount of SUI) represented by the Baskets being created. The creation of a Basket will be made only upon the delivery to the Trust of the number of whole and fractional SUI represented by each Basket being created, the number of which is determined by dividing (x) the amount of SUI owned by the Trust at 4:00 p.m., New York time, on the relevant trade date, after deducting the amount of SUI representing the U.S. dollar value of accrued but unpaid fees and expenses of the Trust (converted using the Index Price at such time, and carried to the eighth decimal place) by (y) the number of Shares outstanding at such time (with the quotient so obtained calculated to one one- hundred-millionth of one SUI (i.e., carried to the eighth decimal place)), and multiplying such quotient by 10,000. The Shares are redeemable in accordance with the provisions of the Trust Agreement and the relevant Participant Agreement. The operation of a redemption program allows Authorized Participants to take advantage of arbitrage opportunities created when the market value of the Shares deviates from the value of the Trust’s SUI, less the Trust’s expenses and other liabilities, which may have the effect of reducing any premium at which the Shares trade on NYSE Arca over such value or cause the Shares to trade at a discount to such value. Each Share represented approximately 14.4785 SUI as of December 31, 2025. Each Share in the initial Baskets represented approximately 15.0 SUI. The amount of SUI required to create a Basket is expected to continue to gradually decrease over time due to the transfer or sale of the Trust’s SUI to pay the Sponsor’s Fee and any Additional Trust Expenses. The Sponsor will determine the Trust’s NAV on each business day as of 4:00 p.m., New York time, or as soon thereafter as practicable. The Sponsor will also determine the NAV per Share, which equals the NAV divided by the number of outstanding Shares. Each business day, the Sponsor will publish the Trust’s NAV and NAV per Share on the Trust’s website, etfs.grayscale.com/gsui, as soon as practicable after the Trust’s NAV and NAV per Share have been determined by the Sponsor. See “—Valuation of SUI and Determination of NAV.” The Trust’s assets consist solely of SUI, cash proceeds from the sale of SUI and any rights of the Trust pursuant to any agreements, other than the Trust Agreement, to which the Trust is a party. The Sponsor has committed to cause the Trust not to take any Affirmative Action to acquire any Incidental Rights or IR Virtual Currency, thereby irrevocably abandoning any Incidental Rights and IR Virtual Currency to which the Trust may become entitled in the future. As a result, the Trust does not expect to hold any Incidental Rights or IR Virtual Currency or to take any Incidental Rights or IR Virtual Currency into account for the purposes of determining the NAV or the NAV per Share. Each Share represents a proportional interest, based on the total number of Shares outstanding, in each of the Trust’s assets as determined in the case of SUI by reference to the Index Price, less the Trust’s expenses and other liabilities (which include accrued but unpaid fees and expenses). The Sponsor expects that the market price of the Shares will fluctuate over time in response to the market prices of SUI. In addition, because the Shares reflect the estimated accrued but unpaid expenses of the Trust, the amount of SUI represented by a Share will gradually decrease over time as the Trust’s SUI are used to pay the Trust’s expenses. SUI pricing information is available on a 24-hour basis from various financial information service providers or Sui Network information sites, such as CoinMarketCap.com. The spot price and bid/ask spreads may also be available directly from Digital Asset Trading Platforms. As of December 31, 2025, the constituent Digital Asset Trading Platforms of the Index were Bitfinex, Bitstamp by Robinhood, Bullish, Bybit, Crypto.com, Kraken and OKX based on the CoinDesk Sui Benchmark Rate. The Index Provider may remove or add Digital Asset Trading Platforms to the Index in the future at its discretion. Market prices for the Shares will be available from a variety of sources, including brokerage firms, information websites and other information service providers. In addition, on each business day the Trust’s website will provide pricing information for the Shares.

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