IYH vs VOO: Holdings Overlap
IYHiShares U.S. Healthcare ETF
iShares · 103 holdings · $3.7B · as of 2026-04-30
Vanguard · 504 holdings · $1.03T · as of 2026-03-31
Holdings snapshots are 30 days apart (IYH: 2026-04-30, VOO: 2026-03-31). Weights and index membership change between snapshots, so the true current overlap is typically higher than shown. For funds tracking the same index, the gap can be 5–15 points.
How similar are IYH and VOO?
iShares U.S. Healthcare ETF (IYH, by iShares) holds 103 positions; Vanguard 500 Index Fund (VOO, by Vanguard) holds 504. They have 54 holdings in common, and by portfolio weight the two funds are 8.9% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 8.9%Sum of the smaller weight of each shared holding
- Shared Holdings
- 54IYH holds 103 · VOO holds 504
- Weight in Shared Holdings
- IYH 91%·VOO 9%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 IYH
49 of 103 positions (8.7% of the fund) are not held by VOO. Showing the top 30 by weight.
Sector Breakdown
| Sector | IYH | 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 |
|---|---|---|---|---|---|---|---|
| IYH | +0.6% | +8.1% | +30.4% | +8.9% | +5.3% | +9.8% | 1.14% |
| 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 IYH vs VOO →
Shared Holdings(54)
The top 10 shared positions account for 63% of the overlap, led by LLY, JNJ and ABBV.
 LLYEli Lilly & Co. COM | 13.72% | 1.30% | 1.30% |
|---|---|---|---|
 JNJJohnson & Johnson COM | 10.14% | 1.05% | 1.05% |
 ABBVAbbVie Inc. COM | 6.86% | 0.69% | 0.69% |
 MRKMerck & Co., Inc COM | 4.97% | 0.53% | 0.53% |
 UNHUnitedHealth Group Inc. COM | 6.18% | 0.44% | 0.44% |
 AMGNAmgen Inc. COM | 3.41% | 0.34% | 0.34% |
 TMOThermo Fisher Scientific Inc COM | 3.32% | 0.33% | 0.33% |
 ABTAbbott Laboratories COM | 2.88% | 0.32% | 0.32% |
 GILDGilead Sciences Inc. COM | 2.99% | 0.31% | 0.31% |
 ISRGIntuitive Surgical Inc. COM NEW | 2.96% | 0.29% | 0.29% |
 PFEPfizer Inc. COM | 2.78% | 0.29% | 0.29% |
 BMYBristol-Myers Squibb Company COM | 2.26% | 0.22% | 0.22% |
 DHRDanaher Corporation COM | 2.07% | 0.21% | 0.21% |
 VRTXVertex Pharmaceuticals Incorporated COM | 1.99% | 0.20% | 0.20% |
 SYKStryker Corporation COM | 1.99% | 0.20% | 0.20% |
 MDTMedtronic PLC USD0.0001 | 1.90% | 0.20% | 0.20% |
 BSXBoston Scientific Corporation COM | 1.56% | 0.17% | 0.17% |
 REGNRegeneron Pharmaceuticals, Inc. COM | 1.32% | 0.14% | 0.14% |
 HCAHCA Healthcare Inc COM | 1.29% | 0.13% | 0.13% |
 CIThe Cigna Group COM | 1.40% | 0.13% | 0.13% |
 ELVElevance Health Inc. COM | 1.53% | 0.11% | 0.11% |
 ZTSZoetis, Inc., Class A | 0.93% | 0.09% | 0.09% |
 CAHCardinal Health, Inc. COM | 0.84% | 0.09% | 0.09% |
 EWEdwards Lifesciences Corporation COM | 0.88% | 0.08% | 0.08% |
 IDXXIDEXX Laboratories Inc. COM | 0.82% | 0.08% | 0.08% |
Frequently Asked Questions
How much do IYH and VOO overlap?
IYH and VOO overlap by 8.9% of portfolio weight. They share 54 holdings (IYH holds 103 positions and VOO holds 504), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IYH and VOO?
The two portfolios are 8.9% identical by weight. Owning both is not redundant. Most of each portfolio is distinct, so the funds can serve different roles.
What are the biggest shared holdings of IYH and VOO?
The largest positions held by both funds are LLY, JNJ, ABBV, MRK and UNH. Together the top 10 shared positions account for 63% of the total overlap.
What does IYH own that VOO doesn't?
49 positions (8.7% of IYH) are unique to IYH, led by ALNY, INSM and NTRA. In the other direction, 450 positions (90.8% of VOO) are unique to VOO.