Grayscale Sui Staking ETF Amends Trust to Start Regular Staking Distributions

What Happened

• On August 6, 2026, Grayscale Investments Sponsors, LLC (the Sponsor) entered into Amendment No. 2 to the Trust Agreement with CSC Delaware Trust Company (the Trustee) for Grayscale Sui Staking ETF (GSUI). The Amendment requires the Trust to convert Staking Consideration to cash no less often than quarterly and to promptly distribute the net cash proceeds of staking rewards to shareholders.
• The Trust currently intends to pay those net cash staking proceeds to shareholders monthly, but no less often than quarterly. Distributions will be after deducting the Staking Fee and any other Trust expenses (including any portion paid to the Sponsor for facilitating staking).

Key Details

• Amendment effective date: August 6, 2026 (8-K filed August 7, 2026).
• Distribution frequency: intended monthly, mandatory no less than quarterly.
• Amounts: distributions equal net cash proceeds of Staking Consideration less Staking Fee and Trust expenses; actual amounts depend on staking receipts and are not predictable.
• Regulatory update: Trust intends to file a prospectus supplement under Rule 424(b)(3) to update public disclosure; Amendment is attached as Exhibit 4.1 to the 8-K.

Why It Matters

• For shareholders, GSUI will begin returning the cash value of staking rewards rather than retaining staking consideration, providing a clearer, periodic cash payout from staking activities. The timing and size of those cash payments will vary based on actual staking returns and fees.
• Investors should note fees (the Staking Fee and other Trust expenses) will reduce distributions and are described in the Trust Agreement. Shareholders are advised to consult tax advisors about any tax consequences from the new distribution framework.