(9)It is important to provide investors and the public with a complete overview of which investments an investment firm that is subject to the disclosure obligations laid down in Articles 19a and 29a of Directive 2013/34/EU has made in Taxonomy-aligned activities. The key performance indicators for such investment firms should therefore cover both their dealing on own account and their dealing on behalf of clients. The disclosure of the key performance indicator for dealing on own account should reflect which proportion of the total assets is composed of assets related to Taxonomy-aligned activities. That indicator should focus on the investment firms’ investments, includingdebt securities and equity instruments in investee companies. The key performance indicator for the environmental sustainability of investment firms’ services and activities on behalf of all their clients should be based on the revenue in the form of fees, commissions and other monetary benefits that investment firms generate from their investment services and activities carried out for their clients.