The S&P Dow Jones Indices said on Friday server maker Dell Technologies, data analytics firm Palantir Technologies and property and casualty insurer Erie Indemnity will join the benchmark S&P 500 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, reports Reuters.
The three companies will replace American Airlines Group, online marketplace Etsy and diagnostics company Bio-Rad Laboratories in the index.
