Is it correct that it is expected from an investor to have all the information needed in the temperature rating approach available himself, which in practice might prove to be quite challenging for e.g., large equity portfolios?

Good question. Several data providers have most or all of the data available for the temperature rating method. We worked together with CDP, Bloomberg, ISS ESG, MSCI, S&P Trucost, and Urgentem and these providers and others have some or all of these data points. The difficult dataset is usually the companies’ targets and CDP has a good dataset for this, which is also “resold” or included in other data providers’ data sets, but other data providers are also building out their own data collection for target data. Initially, you may need to use more than one data provider to get all the data.