← All Nasdaq-100 additions
ALNY — Nasdaq-100 index addition
Alnylam Pharmaceuticals
Sector
Unknown
Announced
Dec 22, 2025
Effective
Dec 22, 2025
Replaced
Biogen
1W after inclusion
-2.2%
-2.1% vs Nasdaq-100
1M after inclusion
-10.4%
-11.6% vs Nasdaq-100
3M after inclusion
-23.4%
-19.9% vs Nasdaq-100
6M after inclusion
-31.8%
-51.2% vs Nasdaq-100
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: -6.6%
Other stocks added to the Nasdaq-100
- RBLX — Roblox joined on Sep 4, 2026.
- SPCX — SpaceX joined on Jul 1, 2026.
- HONA — Honeywell Aerospace joined on Jun 29, 2026.
- RKLB — Rocket Lab joined on Jun 22, 2026.
- TER — Teradyne joined on Jun 22, 2026.
- NBIS — Nebius Group joined on Jun 22, 2026.
See the full Nasdaq-100 additions log or the index review calendar.