Grayscale Sui Staking ETF (GSUI) became a party to an amended custody agreement with Anchorage Digital Bank N.A. on September 29, 2026; effective October 5, 2026, Anchorage Digital may serve as an additional custodian for the Trust’s SUI. Coinbase Custody Trust Company, LLC remains the primary custodian. The Sponsor intends to use Anchorage Digital for a portion of the Trust’s SUI and determines the allocation under the Trust Agreement.
The agreement requires private keys to be held in cold storage, with hot-wallet use permitted for certain transactions. It requires at least $100 million in aggregate commercial crime insurance or a fidelity bond, shared among customers and not specific to the Trust; the prospectus states that coverage may not cover all losses. Updated risks address possible service interruptions during a Sui hard fork, custodian replacement and uncertainty over digital assets in insolvency proceedings.
Grayscale Sui Staking ETF (GSUI) became a party to an amended custody agreement with Anchorage Digital Bank on September 29, 2026. Anchorage Digital will provide custody and safekeeping for a portion of the Trust’s SUI, while Coinbase remains the primary custodian and its existing arrangement is unaffected. The Sponsor has sole discretion to allocate SUI between the custodians and has not determined how much to move to Anchorage Digital. Fees paid to Anchorage Digital are Sponsor-paid expenses.
Anchorage Digital retains custody of the private keys for SUI it holds and may temporarily suspend services during a Sui blockchain fork. It must maintain insurance coverage with limits of at least $100 million in aggregate, including commercial crime insurance or a fidelity bond; shareholders cannot be assured the coverage will cover losses involving the Trust’s SUI.
Grayscale Sui Staking ETF reported net assets of $21.0 million as of June 30, 2026, up from $4.3 million at December 31, 2025, driven mainly by $33.5 million of share creations that more than offset redemptions.
Despite asset growth, performance was weak: the Principal Market NAV per share fell from $20.20 to $10.07 over six months, a total return of -50.15%, reflecting SUI price depreciation from $1.40 to $0.70. Net realized and unrealized losses on SUI were $8.3 million, partially offset by $0.2 million of staking reward income, leaving a net decrease from operations of $8.2 million.
The trust began staking SUI on February 18, 2026 and incurred $32,000 of Sponsor’s Staking Fees, with Validator and Sponsor staking fees together equal to 23% of gross rewards. The base Sponsor’s Fee was cut from 2.5% to 0.35%, with a temporary waiver through May 18, 2026 reducing expenses. A subsequent August 6, 2026 amendment will require converting staking rewards to cash and distributing net proceeds to shareholders at least quarterly, which is expected to create recurring taxable distributions tied to future staking rewards.
Grayscale Sui Staking ETF updates its governing Trust Agreement to begin regular cash distributions of net staking rewards to shareholders. The Trust must convert Staking Consideration to cash at least quarterly and intends to distribute net cash proceeds, after a Staking Fee and expenses, on a monthly, but no less than quarterly, basis.
The Sponsor continues to treat the Trust as a grantor trust for U.S. federal income tax purposes, so income, gains, losses and deductions from SUI and staking are expected to flow through to shareholders. However, the IRS’s 2025 staking safe harbor may not be fully satisfied, and extensive new disclosure highlights that grantor trust status and the tax treatment of digital assets, staking rewards, forks and airdrops remain uncertain.
If the Trust were reclassified as a partnership or corporation, entity-level tax and withholding (including potential 21% corporate tax and 30% withholding on some payments to non‑U.S. investors) could materially reduce after-tax returns and create divergence between NAV and the value of SUI. Non‑U.S. and tax‑exempt holders face specific risks around FDAP income, effectively connected income and potential UBTI from staking.
Grayscale Sui Staking ETF entered into Amendment No. 2 to its Second Amended and Restated Declaration of Trust and Trust Agreement with CSC Delaware Trust Company on August 6, 2026. The changes focus on how staking rewards are converted to cash and distributed to shareholders.
The amendment requires the trust to reduce Staking Consideration to cash no less often than quarterly and promptly distribute the cash proceeds, after Trust expenses and the Staking Fee, to shareholders. The trust currently intends to make these distributions monthly, but at least quarterly. A prospectus supplement under Rule 424(b)(3) is expected to update related disclosure, and shareholders are advised to discuss potential tax consequences with their tax advisors.
DCG International Investments Ltd filed to permit the future public sale of 2,198,900 shares of GSUI common stock on NYSE Arca, with Canaccord Genuity Corp listed in the broker section. The shares were originally purchased from the issuer in a privately negotiated transaction dated August 2, 2024, for cash.
DCG International Investments Ltd also reports prior open-market sales of GSUI common stock during the last three months, including 2,000 shares on May 4, 2026 for proceeds of 26,967.2, and several additional trades between May 5 and August 3, 2026 in blocks ranging from 1,983 to 2,000 shares and 1,222 shares, each with stated cash proceeds.
DCG International Investments Ltd filed to sell up to 1,222 shares of common stock through broker Canaccord Genuity Corp on the NYSE Arca, with a proposed sale date of August 3, 2026. The filing lists an approximate market value of $12,220.00 for these shares and notes that the issuer has 2,198,900 shares outstanding. The shares were originally purchased from the issuer for cash in a privately negotiated transaction on August 2, 2024. The filing also details recent sales by DCG International Investments Ltd over the past three months, including multiple transactions in May and July 2026, each for around 1,983–2,000 shares and proceeds ranging from about $12,097.80 to $28,668.80.
DCG International Investments Ltd plans to sell 1,222 common shares of Canaccord Genuity Corp on NYSE Arca by July 31, 2026. These shares were acquired on August 2, 2024 in a privately negotiated, cash transaction from the issuer. The notice also lists several prior block sales during April, May, and July 2026.
DCG International Investments Ltd plans to sell up to 2,198,900 shares of common stock of GSUI through Canaccord Genuity Corp on or after July 30, 2026, with trading expected on NYSE Arca. These shares were acquired in a privately negotiated transaction from the issuer for cash on August 2, 2024.
Recent activity disclosed includes several sales of 2,000 shares each by DCG International Investments Ltd, such as a sale on April 30, 2026 for $26,199.40 and another on May 1, 2026 for $26,701.40, along with additional similar transactions over the following days.