FactSet is a United States-based company founded in 1978, operating in the Business Services industry with a focus on custom software and IT services, financial services, civil engineering, and information services. The company employs over 10,000 individuals and generates significant revenue, indicating a robust presence in its sectors. FactSet specializes in providing data and analytics solutions, as evidenced by its published methodology guides for various indices. Notably, the FactSet Japan Global Leaders Index and the FactSet Japan Mid and Small Cap Leaders Index are two key offerings, which detail the construction, maintenance, and calculation methodologies for these financial indices. These documents provide insights into index rebalancing, corporate action adjustments, and the continuous calculation of index values, highlighting FactSet's expertise in financial data management and analytics. The company's commitment to delivering comprehensive and precise methodologies reflects its role as a critical resource for financial professionals and institutions seeking reliable data solutions.