Ministry of Finance, http://www.mfin.hr/en
Tax Administration, Ministry of Finance, https://www.porezna-uprava.hr/en/Pages/default.aspx
FINA (Croatian Financial Agency) gathers financial reports from all economic operators in the country. It might be a potential source for data/statistics on the volumes of funding involved and beneficiaries but this data/calculations/research would need to be requested and paid for since it is not publicly available.