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DDOG — S&P 500 index addition
Datadog
Sector
Information Technology
Announced
Jul 2, 2025
Effective
Jul 9, 2025
Replaced
Juniper Networks
1W after inclusion
-2.4%
-2.5% vs S&P 500
1M after inclusion
-8.3%
-9.5% vs S&P 500
3M after inclusion
+8.2%
-0.6% vs S&P 500
6M after inclusion
-6.4%
-17.7% vs S&P 500
1Y after inclusion
+88.4%
+66.1% 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: +17.8%
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.