Shares and rights to reimbursement held by minority shareholders are reported as put options. The amount is measured at amortized cost in accordance with IFRS 9. The long-term put options include co-investor agreements, which can only be exercised at the end of the basic term and where the basic term of the agreement is longer than one year.

The fair value of the purchase price liabilities from put options for shares and rights to reimbursement held by minority shareholders is generally based on the going concern value of the respective company. If a contractually agreed minimum purchase price is higher than this going concern value, this minimum purchase price is recognized.