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IBB

ETF

ISHARES BIOTECHNOLOGY ETF

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$213.43
-$4.71 (2.16%)
At close: Nov 12, 2026, 4:00 PM

Description

The iShares Biotechnology ETF (IBB) invests in equity securities of companies classified in the biotechnology sub‑industry, primarily U.S.‑listed firms that develop and commercialize therapeutic drugs, diagnostics and related life‑science tools, with a modest amount of exposure to international biotech firms. The fund seeks to track the performance of the NYSE (or Nasdaq) Biotechnology Index by holding a market‑capitalisation‑weighted basket of over one hundred biotech and life‑science companies. It provides broad sector exposure rather than focusing on a few large names, spreading holdings across large, mid and small‑cap biotech stocks. IBB is suited to growth‑oriented investors who want concentrated exposure to the biotechnology industry and are comfortable with the higher volatility that typically accompanies the sector.

Top Holdings

The largest holdings of IBB by portfolio weight.

SymbolNameWeight
GILDGILEAD SCIENCES INC8.56%
AMGNAMGEN INC8.20%
VRTXVERTEX PHARMACEUTICALS INC7.53%
REGNREGENERON PHARMACEUTICALS INC5.64%
MRNAMODERNA INC5.29%
NTRANATERA INC3.85%
ARGXARGENX SE ADR3.42%
ILMNILLUMINA INC2.93%
BIIBBIOGEN INC2.58%
RVMDREVOLUTION MEDICINES INC ORDINARY SHARES2.50%
ONCBEONE MEDICINES LTD ADR2.15%
ALNYALNYLAM PHARMACEUTICALS INC2.11%
GMABGENMAB AS ADR1.72%
UTHRUNITED THERAPEUTICS CORP1.71%
INCYINCYTE CORP1.63%
INSMINSMED INC1.42%
ROIVROIVANT SCIENCES LTD ORDINARY SHARES1.33%
CRLCharles River Laboratories International Inc1.18%
EXELEXELIXIS INC1.09%
MEDPMEDPACE HOLDINGS INC1.06%

Explore every IBB holding

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