Boca Raton-based cell tower operator SBA Communications will be added to the S&P 500 index on September 1, according to a news release by S&P Dow Jones Indices.

SBA Communications’ stock opened Friday at $150.98, up $2.90 or 1.96 percent in Nasdaq trading. Diversified chemical company DuPont is being deleted from the S&P 500, according to the Sun & Sentinel.