Palantir, Dell Among New S&P 500 Members as Index Rebalances (1)

Palantir Technologies Inc., Dell Technologies Inc. and Erie Indemnity Co. are set to join the S&P 500 as part of its latest quarterly weighting change.

The companies will replace American Airlines Group Inc., Etsy Inc. and Bio-Rad Laboratories Inc., according to a press release from S&P Dow Jones Indices Friday. The changes are set to go into effect prior to the open of trading on Sept. 23.

The additions of Palantir and Dell reflect how technology companies, and artificial intelligence-related names in particular, are reshaping the market. Palantir, the data-analysis software company co-founded by billionaire tech investor ...