This dataset contains information on the 300 largest cooperatives worldwide, as reported by the World Cooperative Monitor (WCM). The data is sourced from the WCM annual reports, published by the International Cooperative Alliance (ICA) with the support of the European Research Institute on Cooperative and Social Enterprises (Euricse). These reports, published annually since 2012, provide global data on the cooperative movement with a two-year time lag, capturing key metrics on the economic impact and sectoral distribution of cooperatives across the globe. The dataset covers the period from 2010 to 2020, focusing on three main variables: turnover, country of origin, and activity sector for the top 300 cooperatives. These cooperatives are predominantly concentrated in three sectors: Insurance, Agriculture and Food Industries, and Wholesale and Retail Trade. The countries with the highest concentration of large cooperatives include the United States, France, and Germany, with significant contributions from smaller European countries such as Finland and Denmark. This dataset enables the analysis of cooperative concentration, measured as the share of turnover of the largest cooperatives relative to the total market. Additionally, geographic and sectoral trends are examined. The dataset also provides insights into the relative importance of cooperatives in different countries, highlighting their share of turnover in relation to GDP and population.