GSUI Prospectus

The Shares are neither interests in nor obligations of the Sponsor or the Trustee. As provided under the Trust Agreement, the Trust’s assets will not be loaned or pledged, or serve as collateral for any loan, margin, rehypothecation, or other similar activity to which the Sponsor, the Trust or any of their respective affiliates are a party. Some of the notable features of the Trust and its Shares include the holding of SUI in the Trust’s own accounts, the experience of the Sponsor’s management team in the Sui Industry and the use of the Custodian to protect the Trust’s private keys. See “Business—Activities of the Trust.” The Sponsor maintains an internet website at etfs.grayscale.com/gsui, through which the Trust’s annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act, are made available free of charge after they have been filed with or furnished to the SEC. Additional information regarding the Trust may also be found on the SEC’s EDGAR database at www.sec.gov. The contents of the websites referred to above and any websites referred to herein are not incorporated into this filing or any other reports or documents we file with or furnish to the SEC. Further, our references to the URLs for these websites are intended to be inactive textual references only. Trust Objective and Determination of Principal Market NAV and NAV The Trust’s investment objective is for the value of the Shares (based on SUI per Share) to reflect the value of SUI held by the Trust, including SUI earned as Staking Consideration, determined by reference to the Index Price, less the Trust’s expenses and other liabilities. There can be no assurance that the Trust will be able to achieve its investment objective. While an investment in the Shares is not a direct investment in SUI, the Shares are designed to provide investors with a cost- effective and convenient way to gain investment exposure to SUI. A substantial direct investment in SUI may require expensive and sometimes complicated arrangements in connection with the acquisition, security and safekeeping of the SUI and may involve the payment of substantial fees to acquire such SUI from third-party facilitators through cash payments of U.S. dollars. Because the value of the Shares is designed to be correlated with the value of SUI held by the Trust, it is important to understand the investment attributes of, and the market for, SUI. The Trust’s SUI are carried, for financial statement purposes, at fair value, as required by U.S. generally accepted accounting principles (“GAAP”). The Trust determines the fair value of SUI based on the price provided by the Digital Asset Market (defined below) that the Trust considers its principal market as of 4:00 p.m., New York time, on the valuation date. The net asset value of the Trust determined on a GAAP basis is referred to in this prospectus as “Principal Market NAV.” “Digital Asset Market” means a “Brokered Market,” “Dealer Market,” “Principal-to-Principal Market” or “Exchange Market,” as each such term is defined in the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Master Glossary. See “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Policies and Estimates—Principal Market and Fair Value Determination” in the Trust's Annual Report on Form 10-K for more information on the Trust’s principal market selection. The Trust uses the Index Price to calculate its “NAV,” a non-GAAP metric, which is the aggregate value, expressed in U.S. dollars, of the Trust’s assets (other than U.S. dollars or other fiat currency), less the U.S. dollar value of the Trust’s expenses and other liabilities calculated in the manner set forth under “Business —Valuation of SUI and Determination of NAV.” “NAV per Share” is calculated by dividing NAV by the number of Shares then outstanding. NAV and NAV per Share are not measures calculated in accordance with U.S. GAAP. NAV is not intended to be a substitute for the Trust’s Principal Market NAV calculated in accordance with U.S. GAAP, and NAV per Share is not intended to be a substitute for the Trust’s Principal Market NAV per Share calculated in accordance with U.S. GAAP. Staking The Trust Agreement provides that the Trust may engage in Staking, but only if (and, then, only to the extent that) the Staking Condition has been satisfied. On February 17, 2026, the Staking Condition was satisfied with respect to the form of Staking described in this prospectus, and on February 18, 2026, the Trust commenced Staking pursuant to the Staking Arrangements described below. The Sponsor may in the future modify the form of Staking in which the Trust engages, but only if (and, then, only to the extent that) the Staking Condition has been satisfied with respect to any such modified form of Staking, and subject to compliance with any additional requirements that may arise in connection with satisfaction of the Staking Condition with respect thereto.

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