Dell, Palantir and Erie Indemnity to join S&P 500

(Reuters) – The S&P Dow Jones Indices said on Friday server maker Dell Technologies (NYSE:), data analytics firm Palantir Technologies (NYSE:) and property and casualty insurer Erie Indemnity will join the benchmark before the market opens on Sept. 23.

Shares of Palantir rose nearly 8% in extended trading, while those of Dell and Erie rose 6% and 3%, respectively.

The three companies will replace American Airlines (NASDAQ:) Group, online marketplace Etsy (NASDAQ:) and diagnostics company Bio-Rad Laboratories (NYSE:) in the index.

Shares of American Airlines were down 0.7%, while those of Bio-Rad Laboratories and Etsy fell about 1%.