Ultumus | 5,761 followers on LinkedIn. ETF & Index Data Services | PCF Calculation | Create/Redeem Platform COSMOS | Ultumus powers the ETF and index ecosystem with precision, performance and partnership. Headquartered in London with offices in Singapore and Hawaii, Ultumus is the leading provider of ETF and index data, calculation, and workflow solutions. Acquired by SIX in 2021, we serve the entire ETF value chain, from issuers and market makers to asset managers, custodians and fund administrators.