etf overlap · little overlap

IWM vs VO overlap

IWM and VO hold no company in common. Still, 83% of their money sits in the same sectors, led by Financials; they part most on Health Care: 20% of IWM against 9.2% of VO.

Holdings as of September 24, 2026 · source: iShares (IWM), Vanguard (VO) · How we measured all 1,035 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%
VO
100%
  • same money
  • same companies, extra weight
  • only in this fund
Overlap = the sum, over companies both funds hold, of the smaller of the two weights. Cash and derivatives excluded.
01Different

What only one of them gives you

only in IWM1,975 names
TWTWSTTWIST BIOSCIENCE0.40%
MOMOG-AMOOG INC CLASS A0.36%
HUHUTHUT CORP0.35%
FRFROGJFROG0.34%
UMUMBFUMB FINANCIAL0.33%
TXTXG10X GENOMICS CLASS A0.33%
VSVSATVIASAT INC0.31%
BTBTSGBRIGHTSPRING HEALTH SERVICES INC0.31%
only in VO271 names
NENETCloudflare Inc1.11%
Valero Energy Corp logoVLOValero Energy Corp1.10%
Marathon Petroleum Corp logoMPCMarathon Petroleum Corp1.10%
Phillips 66 logoPSXPhillips 661.01%
Quanta Services Inc logoPWRQuanta Services Inc0.95%
VRVRTVertiv Holdings Co0.92%
DDDDOGDatadog Inc0.91%
HWHWMHowmet Aerospace Inc0.89%
02Sectors

No stock in common, 83% in the same sectors

sectorsIWM vs VO, share of each fund
Financials19.01%14.97%
Industrials14.05%18.71%
Health Care20.35%9.25%
Information Technology13.72%15.56%
Consumer Discretionary8.77%8.77%
Energy6.76%8.61%
Real Estate5.68%4.78%
Utilities2.68%7.69%
Materials4.21%4.33%
Consumer Staples1.95%4.81%
Communication Services2.45%2.22%
03Questions

IWM and VO: what people ask

questions4 answered

How much do IWM and VO overlap?

None by holdings, as of September 24, 2026: no company appears in both funds. By sector, 83% of their money sits in the same sectors, led by Financials.

Which stocks do IWM and VO both hold?

None. IWM and VO have no holding in common.

Is it redundant to hold both IWM and VO?

No. Out of every $100 split evenly between them, none buys the same company. Half in each gives you 2,246 different holdings that behave like 663 equally weighted stocks, against 842 for IWM alone and 206 for VO 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 VO?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.