← All S&P SmallCap 600 additions
MKTX — S&P 600 index addition
MarketAxess
Sector
Unknown
Announced
Sep 22, 2025
Effective
Sep 22, 2025
Replaced
MP Materials
1W after inclusion
-0.4%
-0.9% vs S&P 600
1M after inclusion
-3.7%
-3.7% vs S&P 600
3M after inclusion
+0.6%
-1.8% vs S&P 600
6M after inclusion
-1.6%
-9.4% vs S&P 600
1Y after inclusion
—
window not elapsed
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: -5.5%
Other stocks added to the S&P SmallCap 600
- ADIG — ADI Global Distribution joined on Aug 4, 2026.
- FIVN — Five9 joined on Aug 3, 2026.
- VVX — V2X, Inc. joined on Jul 27, 2026.
- TPC — Tutor Perini joined on Jul 24, 2026.
- ROAD — Construction Partners joined on Jul 22, 2026.
- KRMN — Karman Holdings joined on Jul 17, 2026.
See the full S&P SmallCap 600 additions log or the index review calendar.