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WDAY — S&P 500 index addition
Workday
Sector
Information Technology
Announced
Dec 6, 2024
Effective
Dec 23, 2024
Replaced
Amentum Holdings
1W after inclusion
-1.3%
-0.6% vs index
1M after inclusion
-4.5%
-5.2% vs index
3M after inclusion
-6.0%
-2.5% vs index
6M after inclusion
-10.2%
-14.1% vs index
1Y after inclusion
-18.8%
-35.8% vs index
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: -0.9%
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.