Is it mandatory for foreign companies to give reports on CSR activities?

Yes, as per rule 8(2) of the Companies (CSR Policy) Rules, 2014, in case of a CSR-eligible foreign company, the balance sheet filed under clause (b) of sub-section (1) of section 381 of the Act, shall include an annual report on CSR containing particulars specified in Annexure I or Annexure II of the said rules, as applicable.