Grayscale Sui Staking ETF Trust Agreement Amendment

Grayscale Investments Sponsors, LLC (the "Sponsor") announced an upcoming amendment (Amendment No. 2) to the Grayscale Sui Staking ETF Trust Agreement. This amendment, expected around August 7, 2026, aims to allow the Trust to begin distributing net cash proceeds from staking rewards to Shareholders on a regular basis, at least quarterly. This will involve converting a portion of the staked assets to cash to cover Trust expenses and potentially a fee to the Sponsor, with the remainder distributed to Shareholders. The Sponsor believes this amendment is necessary to comply with IRS Revenue Procedure 2025-31 for maintaining grantor trust status for U.S. federal income tax purposes. Although deemed not materially adverse, the Sponsor is providing a 20-day notice to Shareholders. The amendment also includes conforming changes to support the Trust's staking program and distribution framework. Shareholders are advised to consult tax advisors regarding the implications of these changes. Additional disclosures regarding tax consequences and risk factors are also being filed.