← All S&P SmallCap 600 additions
POWI — S&P 600 index addition
Power Integrations
Sector
Unknown
Announced
Dec 22, 2025
Effective
Dec 22, 2025
Replaced
Hecla Mining
1W after inclusion
-3.1%
-3.4% vs S&P 600
1M after inclusion
+23.3%
+19.1% vs S&P 600
3M after inclusion
+26.0%
+21.0% vs S&P 600
6M after inclusion
+136.9%
+117.1% 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: +12.7%
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.