CNCK · Coincheck Group N.V.

This 6-K discloses preliminary, unaudited monthly operating metrics for Coincheck, Inc., the Japan-based crypto exchange subsidiary of Coincheck Group N.V. The data reveals a pronounced contraction in core revenue-generating activity: Marketplace Trading Volume — historically the primary source of Coincheck’s revenue — declined 52% from its July 2025 peak (¥39,165 million) to ¥18,814 million in March 2026, while Exchange Trading Volume fell 30% from its October 2025 high (¥461,342 million). Concurrently, Customer Assets — a key indicator of platform health and custodial trust — dropped 41% from ¥1,239,868 million in July 2025 to ¥728,051 million in March 2026. Notably, the Number of Verified Accounts continued to grow, rising 10% year-over-year to 2,527,772, suggesting user acquisition remains intact but engagement or deposit behavior has weakened. The filing explicitly cautions that these figures are preliminary, unaudited, and not intended for forward-looking inference — limiting their utility for modeling or valuation without further confirmation. As a foreign private issuer reporting under Form 6-K, Coincheck Group provides this disclosure voluntarily as part of its investor communications framework, not in response to a specific SEC Item trigger.