In June, the S&P 500 (SNPINDEX: ^GSPC) rose around 6.5%, bringing its year-to-date gains to more than 15%. The index can thank its heavy hitters for the success it's experienced through the first six months of the year. Without the top 44 stocks in the S&P 500, it would be down year to date.

All 11 sectors finished positive for June, with consumer discretionary leading the way. The following companies were the biggest gainers for the S&P 500.

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Source Fool.com