General, Partnerships Particula Joins 21X as Official Listing Sponsor as 21X Prepares to Launch a Fully Regulated Digital Asset Exchange July 3, 2025 FRANKFURT, 3 July 2025: 21X – the first fully regulated DLT-based trading and settlement system (DLT TSS) in Europe – today announced a strategic partnership with Particula, the prime rating provider for digital assets.