This report has conducted a sharia screening of Large-cap companies listed on OMXS 30, analyzing the daily observations from 2009 to 2019 of the 30 largest sharia-compliant stocks. The data was divided into two parts to portfolios ranging in two different time periods. One long-term which ranged from 2009-2018 and a short-term ranging between 2019 January to 2019 December. Jensen's Alpha, Sharpe ratio, and Treynor’s ratio were used to estimate and analyze the return performance. The results for these portfolios were then compared to the benchmark OMXS30. The results showed that the screened portfolio over-performed against the benchmark in both time periods. Based on this the conclusion was made that people who need or want to invest in a sharia-compliant way do not pay a premium for this nor do they have any tradeoffs in performance.