GSUI 424B3: Material agreement
Grayscale Sui Staking ETF
Filed with the SEC on · accession 0001193125-26-414326
GSUI filed a 424B3 (prospectus (offering)) with the SEC on Oct 5, 2026. The final terms of an offering of shares or bonds. The stock moved +7.2% by the first close after the filing.
Summary of the filing
Grayscale Sui Staking ETF entered into a Sixth Amendment to its Master Custody Service Agreement with Anchorage Digital Bank N.A., allowing Anchorage Digital to serve as an additional custodian for a portion of the Trust's SUI holdings alongside primary custodian Coinbase Custody Trust Company.
Key details
How GSUI stock reacted
Close before
$16.29
Oct 2, 2026
First close after
+7.24%
$17.47
5 trading days
-5.89%
$15.33
Since filing
-27.69%
$11.78
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Click hereFrequently asked questions
What did GSUI file with the SEC on Oct 5, 2026?
GSUI filed a 424B3 (Material agreement). Grayscale Sui Staking ETF entered into a Sixth Amendment to its Master Custody Service Agreement with Anchorage Digital Bank N.A., allowing Anchorage Digital to serve as an additional custodian for a portion of the Trust's SUI holdings alongside primary custodian Coinbase Custody Trust Company.
What does a material agreement mean for GSUI stock?
A contract important enough that investors need to know about it — a big customer contract, a loan, a merger agreement or a partnership.
How do I read a 424B3?
The final terms of an offering of shares or bonds. Look at price, number of shares and the discount to the market price. Large offerings dilute existing shareholders.
Why are SEC filings important?
Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A 424B3 (prospectus (offering)): The final terms of an offering of shares or bonds.
How did GSUI stock react to this filing?
GSUI closed at $16.29 before the filing and $17.47 on Oct 5, 2026 (+7.24%). Five trading days later: $15.33 (-5.89%).
Other GSUI SEC filings
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