SBI VC Trade to Manage WIZE's Solana Treasury as Japan's Biggest Financial Group Enters SOL Custody

SBI VC Trade, the regulated cryptocurrency business of Japan's SBI Holdings, will manage the full Solana treasury of Tokyo Growth Exchange-listed WIZE under a partnership announced June 4 via an official SBI Holdings press release. The deal covers trading, custody, and asset management, delivered through SBI VC Trade's "SBIVC for Prime" institutional platform, and marks the first formal institutional services arrangement between a major Japanese financial group and a listed company's SOL-denominated balance sheet.

WIZE's Solana Treasury Footprint

WIZE, formerly Mobcast Holdings, began a Solana Treasury Business in 2025, integrating SOL as a long-term balance-sheet asset alongside its social entertainment and media operations. Per the WIZE disclosure cited in the press release, as of May 26 the company held roughly 32,100 SOL in its "WIZE Treasury Core" position, acquired at a cumulative cost of 680 million yen, with a broader treasury (including delegated holdings) of approximately 121,000 SOL.

The company earns income from two streams: staking rewards from self-held SOL and validator rewards from delegated stake. WIZE also operates the "WIZE validator" as an approved member of the Solana Foundation Delegation Program, making it a direct participant in network infrastructure rather than a passive holder. WIZE has described its goal as becoming Japan's leading Solana treasury company.

Before settling on SBI VC Trade, WIZE evaluated several providers against criteria that included regulatory compliance, security controls, and support for institutional digital asset services.

What SBI VC Trade Brings

SBI VC Trade is a licensed cryptocurrency service provider registered under Japanese financial regulation. Through SBIVC for Prime, it will provide WIZE with large-volume trading capability, secure custody and storage, market-responsive purchase execution, and technical support. The partnership also opens exploration of additional yield strategies, including options-related approaches layered on top of the existing staking and validator income.

Japan's regulatory environment for digital asset businesses is among the most structured in the world, which made SBI VC Trade's compliance standing a material factor in WIZE's selection.

Japan's Institutional Custody Layer Takes Shape

The WIZE deal is a small but pointed data point in a larger pattern. Institutional interest in Solana has accelerated since the launch of U.S. spot Solana ETFs; Solana spot ETFs drew $115 million in May 2026, their best monthly inflow since October 2025. The infrastructure to support corporate treasury strategies (regulated custody, trading desks, yield optimization) is now being built in Asia's most compliance-oriented financial market.

The Fitell/Solana Australia announcement earlier this month showed the same dynamic taking shape in the Asia-Pacific region: Australia's first listed SOL treasury company secured $100 million in convertible financing. Japan's iteration is smaller but arrives with more established institutional infrastructure behind it.

WIZE disclosed that the partnership's effect on its consolidated earnings is negligible and that no change to its earnings forecasts is expected as a result.

SBI Holdings is one of Japan's largest financial conglomerates and holds a long-standing ownership stake in Ripple, though that relationship is separate from SBI VC Trade's digital asset services business and from this announcement.