IHI vs VOO: Holdings Overlap
IHIiShares U.S. Medical Devices ETF
iShares · 47 holdings · $3.4B · as of 2026-03-31
Vanguard · 504 holdings · $1.03T · as of 2026-03-31
How similar are IHI and VOO?
iShares U.S. Medical Devices ETF (IHI, by iShares) holds 47 positions; Vanguard 500 Index Fund (VOO, by Vanguard) holds 504. They have 16 holdings in common, and by portfolio weight the two funds are 1.7% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 1.7%Sum of the smaller weight of each shared holding
- Shared Holdings
- 16IHI holds 47 · VOO holds 504
- Weight in Shared Holdings
- IHI 89%·VOO 2%Share of each fund's weight in stocks both funds own
Based on each fund's latest official holdings. How is this calculated?
What makes each fund different
Only in IHI
31 of 47 positions (11.2% of the fund) are not held by VOO. Showing the top 30 by weight.
Sector Breakdown
| Sector | IHI | VOO |
|---|---|---|
| Health Care | 99.8% | 9.5% |
| Information Technology | 0.0% | 32.7% |
| Financials | 0.0% | 12.4% |
| Communication Services | 0.0% | 10.5% |
| Consumer Discretionary | 0.0% | 9.9% |
| Other Sectors | 0.0% | 24.9% |
Share of each fund's portfolio weight by GICS-style sector, compiled from issuer fund data and our own classification of the holdings, not the issuers' published sector charts.
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IHI | +4.1% | -12.3% | -9.9% | +0.5% | -2.6% | +8.9% | 0.45% |
| VOO | +3.4% | +14.0% | +23.7% | +21.3% | +13.4% | +15.4% | 1.03% |
Total returns including dividends, from adjusted daily closes as of 2026-08-07. 3Y/5Y/10Y are annualized. Yield is trailing-12-month distributions over the last close. Past performance does not predict future results.
Project the growth of $10,000 in IHI vs VOO →
Shared Holdings(16)
The top 10 shared positions account for 89% of the overlap, led by ABT, ISRG and SYK.
 ABTAbbott Laboratories COM | 16.98% | 0.32% | 0.32% |
|---|---|---|---|
 ISRGIntuitive Surgical Inc. COM NEW | 15.57% | 0.29% | 0.29% |
 SYKStryker Corporation COM | 10.76% | 0.20% | 0.20% |
 MDTMedtronic PLC USD0.0001 | 4.62% | 0.20% | 0.20% |
 BSXBoston Scientific Corporation COM | 4.28% | 0.17% | 0.17% |
 EWEdwards Lifesciences Corporation COM | 4.47% | 0.08% | 0.08% |
 IDXXIDEXX Laboratories Inc. COM | 4.44% | 0.08% | 0.08% |
 BDXBecton, Dickinson and Company COM | 4.57% | 0.08% | 0.08% |
 RMDResMed Inc. COM | 4.43% | 0.06% | 0.06% |
 GEHCGE Healthcare Technologies Inc. COMMON STOCK | 4.40% | 0.06% | 0.06% |
 DXCMDexCom Inc COM | 3.28% | 0.04% | 0.04% |
 STESteris PLC ORD USD0.001 | 2.94% | 0.04% | 0.04% |
 ZBHZimmer Biomet Holdings Inc COM | 2.43% | 0.03% | 0.03% |
 HOLXHologic Inc COM | 2.28% | 0.03% | 0.03% |
 PODDInsulet Corporation COM | 2.00% | 0.03% | 0.03% |
 BAXBaxter International, Inc. COM | 1.17% | 0.02% | 0.02% |
Frequently Asked Questions
How much do IHI and VOO overlap?
IHI and VOO overlap by 1.7% of portfolio weight. They share 16 holdings (IHI holds 47 positions and VOO holds 504), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IHI and VOO?
The two portfolios are 1.7% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What are the biggest shared holdings of IHI and VOO?
The largest positions held by both funds are ABT, ISRG, SYK, MDT and BSX. Together the top 10 shared positions account for 89% of the total overlap.
What does IHI own that VOO doesn't?
31 positions (11.2% of IHI) are unique to IHI, led by PEN, GMED and Masimo Corporation COM. In the other direction, 488 positions (98.0% of VOO) are unique to VOO.