FactSet B-One (Performance, Attribution and Composites Management)

FactSet B-One (Performance, Attribution and Composites Management) is a performance and attribution product from FactSet Research Systems. Enterprise performance measurement, attribution and GIPS composite management; also listed as a vendor in the official GIPS Standards service provider directory. It is also listed under risk analytics and client reporting. FactSet Research Systems is based in Norwalk, CT, USA and was founded in 1978 and is owned by FactSet Research Systems. Buyside Fintech verified that FactSet Research Systems lists this product on an industry source on 2026-10-11, and the page we read is linked below. We do not record how it is deployed, how it is priced, what it costs and the firm sizes it serves for this product, because FactSet Research Systems does not publish it; the table below shows those rows empty rather than hiding them. Practitioner reviews and questions about FactSet B-One (Performance, Attribution and Composites Management) appear below, and anyone at a firm that uses it can add one.