etf overlap tool · little overlap

IWM vs VOOG overlap

IWM and VOOG hold no company in common. Still, 46% of their money sits in the same sectors, led by Information Technology, which is 54% of VOOG against 13% of IWM.

Holdings as of September 30, 2026 · source: iShares (IWM), Vanguard (VOOG) · How we measured all 1,431 pairs

overlapfull holdings, by weight

0.0%of each fund is money the other holds at the same weight, across 0 shared companies.

IWM

100%

0.0% in VOOG

VOOG

100%

0.0% in IWM

same money
same companies, extra weight
only in this fund

Hold IWM and VOOG with other funds or stocks? The free portfolio optimizer opens IWM and VOOG beside the rest of what you own: the companies you hold twice, what the funds cost a year, and where the next deposit should go. No account.

01Different

What only one of them gives you

only in IWM1,971 names

MOMOG-AMOOG INC CLASS A0.36%

BTBTSGBRIGHTSPRING HEALTH SERVICES INC0.35%

UMUMBFUMB FINANCIAL0.34%

SMSMSM ENERGY0.33%

GKGKOSGLAUKOS0.33%

FRFROGJFROG0.32%

EAEATBRINKER INTERNATIONAL INC0.31%

FCFCFSFIRSTCASH HOLDINGS INC0.31%

only in VOOG152 names

NVDANVIDIA Corp14.99%

MSFTMicrosoft Corp10.33%

AAPLApple Inc6.59%

GOOGLAlphabet Inc5.48%

AVGOBroadcom Inc4.53%

GOOGAlphabet Inc4.39%

METAMeta Platforms Inc4.34%

AMZNAmazon.com Inc3.52%

02Sectors

No stock in common, 46% in the same sectors

sectorsIWM vs VOOG, share of each fund

Information Technology12.83%54.04%

Financials19.72%8.36%

Health Care19.84%6.13%

Industrials13.79%5.87%

Communication Services2.37%15.43%

Consumer Discretionary9.31%7.74%

Energy7.02%0.00%

Real Estate5.88%0.58%

Materials4.17%0.33%

Utilities2.87%0.31%

Consumer Staples2.06%1.05%

03Questions

IWM and VOOG: what people ask

questions4 answered

How much do IWM and VOOG overlap?

None by holdings, as of September 30, 2026: no company appears in both funds. By sector, 46% of their money sits in the same sectors, led by Information Technology.

Which stocks do IWM and VOOG both hold?

None. IWM and VOOG have no holding in common.

Is it redundant to hold both IWM and VOOG?

No. Out of every $100 split evenly between them, none buys the same company. Half in each gives you 2,123 different holdings that behave like 74 equally weighted stocks, against 834 for IWM alone and 19 for VOOG alone. Whether that mix suits you depends on what you want to own; this is a description, not advice.

How is ETF overlap calculated here?

For every company held by both funds we take the smaller of its two weights and add them up. The weights come from the full holdings files iShares and Vanguard publish, not a top-10 sample, and companies are matched by their ISIN so share classes stay apart. Sector overlap applies the same rule to the issuers' sector labels; "behaves like N equally weighted stocks" is one over the sum of the squared weights.

Hold IWM and VOOG?Import your positions and see what your funds hold together, company by company, with the fees you pay on each.Import my portfolio

Weights come from each issuer's published holdings file and are matched company by company on their ISIN. Cash, futures and currency positions are left out. This page describes what the funds hold; it is not investment advice.