← All S&P 500 additions
PLTR — S&P 500 index addition
Palantir Technologies
Sector
Information Technology
Announced
Sep 6, 2024
Effective
Sep 23, 2024
Replaced
American Airlines
1W after inclusion
-2.0%
-2.7% vs S&P 500
1M after inclusion
+12.2%
+11.1% vs S&P 500
3M after inclusion
+112.3%
+107.2% vs S&P 500
6M after inclusion
+139.7%
+138.3% vs S&P 500
1Y after inclusion
+381.0%
+362.4% vs S&P 500
Indexed performance around the effective date (effective close = 100)
Prices last updated: 2026-09-16 06:30 UTC (9h ago)
Run-up in the 30 days into inclusion: +19.4%
Other stocks added to the S&P 500
- RDDT — Reddit joined on Aug 18, 2026.
- FERG — Ferguson Enterprises joined on Aug 5, 2026.
- HONA — Honeywell Aerospace joined on Jun 29, 2026.
- FLEX — Flex Ltd. joined on Jun 22, 2026.
- MRVL — Marvell Technology joined on Jun 22, 2026.
- FDXF — FedEx Freight joined on Jun 1, 2026.
See the full S&P 500 additions log or the index review calendar.