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ENTG — S&P 400 index addition
Entegris
Sector
Unknown
Announced
Mar 6, 2025
Effective
Mar 6, 2025
Replaced
Arcadium Lithium
1W after inclusion
-5.8%
-5.2% vs index
1M after inclusion
-34.8%
-32.2% vs index
3M after inclusion
-27.5%
-27.8% vs index
6M after inclusion
-18.1%
-26.4% vs index
1Y after inclusion
+12.6%
-7.4% 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 MidCap 400
- SUI — Sun Communities joined on Aug 20, 2026.
- KRYS — Krystal Biotech joined on Jul 24, 2026.
- MOH — Molina Healthcare joined on Jul 22, 2026.
- BTSG — BrightSpring Health Services joined on Jul 17, 2026.
- ALSN — Allison Transmission joined on Jul 6, 2026.
- TOST — Toast, Inc. joined on Jul 1, 2026.
See the full S&P MidCap 400 additions log or the index review calendar.