Grayscale Sui Trust (SUI)

S-11 sui-20251205.htm S-1

As filed with the Securities and Exchange Commission on December 5, 2025

Registration No. 333-

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-1

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

(Exact Name of Registrant as Specified in Its Charter)

Edward McGeeChief Financial Officer Grayscale Investments Sponsors, LLC290 Harbor Drive, 4th FloorStamford, Connecticut 06902(212) 668-1427

(Name, Address, Including Zip Code, and Telephone Number, Including Area Code, of Agent For Service)

Copies to:

Joseph A. HallDaniel P. GibbonsDavis Polk & Wardwell LLP450 Lexington AvenueNew York, New York 10017(212) 450-4000

Approximate date of commencement of proposed sale to the public: As soon as practicable after the effective date of this Registration Statement.

If any of the securities being registered on this form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, check the following box.☒

If this form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.☐

If this form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.☐

If this form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. □

The Registrant hereby amends this Registration Statement on such date or dates as may be necessary to delay its effective date until the Registrant shall file a further amendment which specifically states that this Registration Statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until the Registration Statement shall become effective on such date as the Commission, acting pursuant to said Section 8(a), may determine.

The information in this prospectus is not complete and may be changed. We may not sell these securities until the registration statement filed with the Securities and Exchange Commission is effective. This prospectus is not an offer to sell these securities and is not soliciting an offer to buy these securities in any state where the offer or sale is not permitted.

SUBJECT TO COMPLETION, DATED DECEMBER 5, 2025

PRELIMINARY PROSPECTUS

Grayscale Sui Trust (SUI) (the “Trust”) is a Delaware statutory trust that issues common units of fractional undivided beneficial interest (“Shares”), which represent ownership in the Trust. In connection with the effectiveness of this registration statement and the listing of the Shares on NYSE Arca, the Sponsor intends to rename the Trust as Grayscale Sui Trust ETF by filing a Certificate of Amendment to the Certificate of Trust with the Delaware Secretary of State in accordance with the provisions of the DSTA. The Trust’s purpose is to hold “SUI”, which are digital assets based on an open source cryptographic protocol existing on the Sui Network, comprising units that constitute the assets underlying the Trust’s Shares. 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 (to the extent that the Staking Condition is satisfied and Staking is implemented), as determined by reference to the Index Price (as defined herein), less the Trust’s expenses and other liabilities. 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. Grayscale Investments Sponsors, LLC is the sponsor of the Trust (the “Sponsor”). CSC Delaware Trust Company is the trustee of the Trust (the “Trustee”), The Bank of New York Mellon is the transfer agent of the Trust (in such capacity, the “Transfer Agent”) and the administrator of the Trust (in such capacity, the “Administrator”), Coinbase, Inc. is the prime broker of the Trust (the “Prime Broker”), and Coinbase Custody Trust Company, LLC is the custodian of the Trust (the “Custodian”).

The Shares are currently quoted on OTCQX under the ticker symbol “GSUI” and following the effectiveness of the registration statement of which this prospectus forms a part, the Trust intends to list the Shares on NYSE Arca, Inc. (“NYSE Arca”) under the symbol “GSUI.” The Trust intends to issue Shares on a continuous basis and is registering an indeterminate number of Shares. It is expected that the Shares will be sold to the public at varying prices to be determined by reference to, among other considerations, the price of SUI and the trading price of the Shares on the NYSE Arca at the time of each sale.

The Shares may be purchased from the Trust only in one or more blocks of 10,000 Shares (a block of 10,000 Shares is called a “Basket”). The Trust issues Baskets of Shares to certain authorized participants (“Authorized Participants”) on an ongoing basis as described in “Plan of Distribution.” In addition, the Trust redeems Shares in Baskets on an ongoing basis from Authorized Participants. As of the date of this prospectus, NYSE Arca has received regulatory approval permitting the Trust to conduct creations and redemptions of Shares via in-kind transactions with Authorized Participants or their designees (any such designee, an “AP Designee”) in exchange for SUI. The Trust is also able to accept Cash Orders (as defined herein). Accordingly, the Trust currently conducts creations and redemptions of Shares pursuant to In-Kind Orders and Cash Orders (each as described herein). See “Description of Creation and Redemption of Shares.” Some of the activities of the Authorized Participants MAY result in their being deemed participants in a distribution in a manner which would render them statutory underwriters and subject them to the prospectus-delivery and liability provisions under the Securities Act of 1933, as amended (the “Securities Act”). See “Plan of Distribution.”

Investing in the Shares involves significant risks. You should carefully consider the risk factors described in “Risk Factors” starting on page 20 before you invest in the Shares.

The Trust is an “emerging growth company” as defined in the Jumpstart Our Business Startups Act and will therefore be subject to reduced reporting requirements. Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The Shares are neither interests in nor obligations of the Sponsor or the Trustee.

The U.S. dollar value of a Basket of Shares at 4:00 p.m., New York time, on the trade date of a creation or redemption order is equal to the “Basket Amount”, which is the amount of SUI required to create or redeem a Basket of Shares, multiplied by the “Index Price,” which is the U.S. dollar value of a SUI derived from the Digital Asset Trading Platforms (as defined herein) that are reflected in the CoinDesk SUI CCIXber Reference Rate (the “Index”), calculated at 4:00 p.m., New York time, on each business day. The Index Price is calculated using non-GAAP methodology and is not used in the Trust’s financial statements.

The Trust is not a registered investment company under the Investment Company Act of 1940, as amended (the “Investment Company Act”) and is therefore not subject to regulation under the Investment Company Act. Furthermore, the Sponsor believes that the Trust is not a commodity pool for purposes of the Commodity Exchange Act of 1936, as amended (the “CEA”), as administered by the Commodity Futures Trading Commission (the “CFTC”) and that neither the Sponsor nor the Trustee is subject to regulation by the CFTC as a commodity pool operator or a commodity trading advisor. See “Risk Factors—Risk Factors Related to the Trust and the Shares— Shareholders do not have the protections associated with ownership of shares in an investment company registered under the Investment Company Act or the protections afforded by the CEA.”

The date of this prospectus is , 2025.

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Neither the Trust nor the Sponsor has authorized anyone to provide you with any information other than that contained in this prospectus or any free writing prospectus prepared by or on behalf of the Trust. Neither the Trust nor the Sponsor takes any responsibility for, and can provide no assurance as to the reliability of, any information that others may give you. Neither the Trust nor the Sponsor is making an offer to sell any security or soliciting any offer to buy any security in any jurisdiction where the offer or sale is not permitted. You should not assume that the information appearing in this prospectus or any free writing prospectus is accurate as of any date other than the respective dates on the front of such documents. The Trust’s business, assets, financial condition, results of operations and prospects may have changed since those dates.

This prospectus does not constitute an offer to sell, or an invitation on behalf of the Trust or the Sponsor, to subscribe to or purchase any securities, and may not be used for or in connection with an offer or solicitation by anyone, in any jurisdiction in which such an offer or solicitation is not authorized or to any person to whom it is unlawful to make such an offer or solicitation.

Authorized Participants may be required to deliver a prospectus when making transactions in the Shares. The information contained in the section captioned “Business—Overview of the Sui Industry and Market” is based on information obtained from sources that the Sponsor believes are reliable. This prospectus summarizes certain documents and other information in a manner the Sponsor believes to be accurate. In making an investment decision, you must rely on your own examination of the Trust, the Sui industry, the operation of the SUI market and the terms of the offering and the Shares, including the merits and risks involved. Although the Sponsor believes this information to be reliable, the accuracy and completeness of this information is not guaranteed and has not been independently verified.

See “Glossary of Defined Terms” for the definition of certain capitalized terms used in this prospectus.

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