etf overlap tool · little overlap

VIG vs IWM overlap

1.0% of VIG and IWM is the same money, spread over 87 companies both funds hold.

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

overlapfull holdings, by weight

1.0%of each fund is money the other holds at the same weight, across 87 shared companies.

VIG

99%

1.0% in IWM

IWM

92%

8.0% in VIG

same money
same companies, extra weight
only in this fund

Hold VIG and IWM with other funds or stocks? The free portfolio optimizer opens VIG and IWM 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.

01Shared

The companies you would own twice

held by bothtop 15 of 87

companyVIGIWM

UMUMBFUMB Financial Corp0.04%0.34%

MAMATXMatson Inc0.03%0.25%

NPNPOEnpro Inc0.03%0.21%

GAGATXGATX Corp0.03%0.20%

TXTXNMTXNM Energy Inc0.03%0.22%

MTMTRNMaterion Corp0.02%0.18%

HOHOMBHome BancShares Inc/AR0.02%0.20%

BCBCPCBalchem Corp0.02%0.19%

SISIGISelective Insurance Group Inc0.02%0.19%

CNCNOCNO Financial Group Inc0.02%0.18%

UFUFPIUFP Industries Inc0.02%0.16%

FFFFINFirst Financial Bankshares Inc0.02%0.14%

SFSFBSServisFirst Bancshares Inc0.02%0.14%

UCUCBUnited Community Banks Inc/GA0.02%0.14%

CBCBTCabot Corp0.02%0.13%

02Different

What only one of them gives you

only in VIG246 names

MSFTMicrosoft Corp4.91%

AAPLApple Inc4.89%

AVGOBroadcom Inc4.30%

LLYEli Lilly & Co4.10%

JPMJPMorgan Chase & Co3.90%

XOMExxonMobil Holdings Corp2.97%

JNJJohnson & Johnson2.83%

VVisa Inc2.53%

only in IWM1,884 names

MOMOG-AMOOG INC CLASS A0.36%

BTBTSGBRIGHTSPRING HEALTH SERVICES INC0.35%

SMSMSM ENERGY0.33%

GKGKOSGLAUKOS0.33%

FRFROGJFROG0.32%

EAEATBRINKER INTERNATIONAL INC0.31%

FCFCFSFIRSTCASH HOLDINGS INC0.31%

ONONBOLD NATIONAL BANCORP0.31%

03Sectors

Where each fund puts its money

sectorsVIG vs IWM, share of each fund

Financials20.70%19.72%

Information Technology26.69%12.83%

Health Care18.54%19.84%

Industrials11.34%13.79%

Consumer Discretionary3.71%9.31%

Consumer Staples9.13%2.06%

Energy3.56%7.02%

Materials3.19%4.17%

Real Estate0.00%5.88%

Utilities2.70%2.87%

Communication Services0.00%2.37%

04Questions

VIG and IWM: what people ask

questions4 answered

How much do VIG and IWM overlap?

1.0% by weight, as of September 30, 2026: little overlap. 87 companies appear in both funds; they make up 1.0% of VIG and 8.0% of IWM.

Which stocks do VIG and IWM both hold?

The largest shared positions are UMBF, MATX, NPO, GATX and TXNM. Ranked by the smaller of the two weights, which is the part you would own twice.

Is it redundant to hold both VIG and IWM?

Out of every $100 split evenly between them, about $1 (half in each fund) buys identical positions. The rest is exposure only one of the two funds gives you: 246 names only in VIG, 1,884 only in IWM. Half in each behaves like 203 equally weighted stocks, against 54 for VIG alone and 834 for IWM alone. Whether that duplication is a problem depends on the mix you want; 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 Vanguard and iShares 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 VIG and IWM?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.