Grayscale Sui Trust (GSUI) is a digital asset investment trust sponsored by Grayscale Investments, LLC, a subsidiary of Digital Currency Group, Inc., that provides investors with exposure to SUI, the native token of the Sui Layer-1 blockchain platform designed for high-speed smart contract deployment, scalability, sub-second transaction finality, and applications in finance, gaming, AI, and everyday use cases; the Trust issues shares traded publicly that represent fractional ownership of SUI held by the Trust, eliminating the complexities of direct cryptocurrency custody, storage, security, and compliance for investors. Headquartered in Stamford, Connecticut, the Trust was initially launched in August 2024 as a private placement for accredited investors before beginning public trading on the OTCQX market under the ticker GSUI in November 2025. It targets institutional and retail investors seeking regulated access to next-generation blockchain protocols without managing wallets or direct token handling, operating primarily in the United States with shares quoted on OTC markets. Recently, the Trust underwent a significant reorganization effective January 1, 2025, transitioning sponsorship from Grayscale Investments, LLC to its consolidated subsidiaries Grayscale Investments Sponsors, LLC and Grayscale Operating, LLC; it amended its S-1 registration in February 2026 to pursue listing as a spot ETF or staking ETF on NYSE Arca, reflecting Grayscale's strategy to convert private trusts into public exchange-traded products for broader participation. These developments align with Grayscale's expansion of single-asset trusts into ETFs amid growing institutional demand for Sui's developer-centric ecosystem.