Which stocks do IBB and IWM both hold?

140 stocks are in both. The biggest shared positions: CYTK (0.8% of IBB, 0.3% of IWM), KRYS (0.7% of IBB, 0.3% of IWM), ALKS (0.7% of IBB, 0.3% of IWM), PRAX (0.7% of IBB, 0.3% of IWM), PCVX (0.6% of IBB, 0.2% of IWM).

IBBvsIWM

iShares Biotechnology ETF or iShares Russell 2000 ETF, side by side from their own SEC filings. 9.6% of their stock holdings are the same at the same weight, across 140 stocks in both. IWM costs 0.19% a year against 0.44% for IBB, $25 a year less on $10,000. Over the last twelve months IBB returned +50.6% and IWM +40.6%.

9.6%of the two portfolios is the same stocks at the same weight

IBB24% in stocks the other holds too

IWM9.6% in stocks the other holds too

stocks in bothstocks only in that fundbonds, cash and unmatched shares

The two funds

From each fund's latest N-PORT filing and its prospectus.

IBBIWMYearly cost0.44%0.19%Net assets$9.1B$83.0BPositions2522,017Last 12 months+50.6%+40.6%3 years, a year+14.7%+18.4%5 years, a year+3.3%+6.9%Largest holdingBlackRock 12.0%BlackRock 17.0%Main sectorHealthcare 97%Healthcare 19%Holdings as ofJun 30, 2026Jun 30, 2026

Returns are total returns with dividends reinvested, from the funds’ own monthly figures; “(price)” marks a fund whose filing record is younger than a year, whose twelve months are its price change. The stronger figure in each row is set in bold. Past returns say what happened, not what will.

Growth of $100

Both funds from July 2019, the first month both report, dividends reinvested.

IBB$177IWM$210

July 2019June 2026

What they both hold

140 stocks are in both funds: 24% of IBB and 9.6% of IWM. The biggest shared positions:

Stockin IBBin IWM

CYTKCytokinetics, Incorporated0.8%0.3%KRYSKrystal Biotech, Inc.0.7%0.3%ALKSAlkermes plc0.7%0.3%PRAXPraxis Precision Medicines, Inc.0.7%0.3%PCVXVaxcyte, Inc.0.6%0.2%PTGXProtagonist Therapeutics, Inc.0.6%0.2%KYMRKymera Therapeutics, Inc.0.6%0.2%PTCTPTC Therapeutics, Inc.0.5%0.2%SYRESpyre Therapeutics, Inc.0.5%0.2%COGTCogent Biosciences, Inc.0.4%0.2%

Only in IBB

Its biggest stocks the other fund does not hold.

Only in IWM

Its biggest stocks the other fund does not hold.

More comparisons

IBB vs XBI IBB vs VHT IBB vs IWO IBB vs VBK IBB vs XLV IWM vs VTWO IWM vs IWO IWM vs SCHA

From each fund’s Form N-PORT (IBB: June 2026, IWM: June 2026) and prospectus, via the SEC’s public data sets. Overlap counts only the stocks we can match to a listing: stock by stock, the smaller of the two weights, added up.