IBB vs VHT: Holdings Overlap
iShares · 254 holdings · $9.3B · as of 2026-03-31
VHTVanguard Health Care Index Fund
Vanguard · 402 holdings · $18.3B · as of 2026-05-31
Holdings snapshots are 61 days apart (IBB: 2026-03-31, VHT: 2026-05-31). 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 IBB and VHT?
iShares Biotechnology ETF (IBB, by iShares) holds 254 positions; Vanguard Health Care Index Fund (VHT, by Vanguard) holds 402. They have 173 holdings in common, and by portfolio weight the two funds are 17.7% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 17.7%Sum of the smaller weight of each shared holding
- Shared Holdings
- 173IBB holds 254 · VHT holds 402
- Weight in Shared Holdings
- IBB 86%·VHT 18%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 IBB
81 of 254 positions (14.1% of the fund) are not held by VHT. Showing the top 30 by weight.
Sector Breakdown
| Sector | IBB | VHT |
|---|---|---|
| Health Care | 91.0% | 99.8% |
| Other Sectors | 0.0% | 0.0% |
| Unclassified | 8.9% | 0.0% |
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. “Unclassified” is weight we could not classify (9% of IBB, 0% of VHT).
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IBB | -0.3% | +17.3% | +51.0% | +16.4% | +3.1% | +7.4% | 0.21% |
| VHT | +0.6% | +9.2% | +32.8% | +10.0% | +5.4% | +10.2% | 1.51% |
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 IBB vs VHT →
Shared Holdings(173)
The top 10 shared positions account for 62% of the overlap, led by AMGN, GILD and VRTX.
 AMGNAmgen Inc. COM | 7.51% | 2.87% | 2.87% |
|---|---|---|---|
 GILDGilead Sciences Inc. COM | 7.75% | 2.64% | 2.64% |
 VRTXVertex Pharmaceuticals Incorporated COM | 7.44% | 1.80% | 1.80% |
 REGNRegeneron Pharmaceuticals, Inc. COM | 7.21% | 1.00% | 1.00% |
 ALNYAlnylam Pharmaceuticals Inc. COM | 3.99% | 0.63% | 0.63% |
 NTRANatera Inc. COM | 2.41% | 0.46% | 0.46% |
 BIIBBiogen Inc COM | 2.46% | 0.46% | 0.46% |
 RVMDRevolution Medicines Inc COM | 1.54% | 0.40% | 0.40% |
 ILMNIllumina Inc COM | 1.68% | 0.39% | 0.39% |
 INSMInsmed Inc COM PAR $.01 | 3.20% | 0.36% | 0.36% |
 UTHRUnited Therapeutics Corporation COM | 2.30% | 0.36% | 0.36% |
 INCYIncyte Corporation. COM | 1.70% | 0.26% | 0.26% |
 NBIXNeurocrine Biosciences Inc COM | 1.18% | 0.25% | 0.25% |
 MRNAModerna Inc COM | 1.68% | 0.23% | 0.23% |
 EXELExelixis, Inc. COM | 0.99% | 0.20% | 0.20% |
 IONSIonis Pharmaceuticals, Inc. COM | 1.11% | 0.19% | 0.19% |
 ROIVRoivant Sciences Ltd SHS | 1.24% | 0.18% | 0.18% |
 BMRNBiomarin Pharmaceutical Inc. COM | 0.98% | 0.17% | 0.17% |
 MEDPMedpace Holdings Inc. COM | 1.00% | 0.16% | 0.16% |
 BBIOBridgebio Pharma Inc COM | 1.13% | 0.15% | 0.15% |
 ARWRArrowhead Pharmaceuticals Inc COM | 0.75% | 0.15% | 0.15% |
 CYTKCytokinetics Incorporated | 0.73% | 0.14% | 0.14% |
 CRLCharles River Laboratories International, Inc. COM | 0.77% | 0.14% | 0.14% |
 PRAXPraxis Precision Medicines Inc COM NEW | 0.77% | 0.13% | 0.13% |
 AXSMAxsome Therapeutics Inc. COM | 0.66% | 0.13% | 0.13% |
Frequently Asked Questions
How much do IBB and VHT overlap?
IBB and VHT overlap by 17.7% of portfolio weight. They share 173 holdings (IBB holds 254 positions and VHT holds 402), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IBB and VHT?
The two portfolios are 17.7% 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 IBB and VHT?
The largest positions held by both funds are AMGN, GILD, VRTX, REGN and ALNY. Together the top 10 shared positions account for 62% of the total overlap.
What does IBB own that VHT doesn't?
81 positions (14.1% of IBB) are unique to IBB, led by ARGX, ONC and GMAB. In the other direction, 229 positions (82.1% of VHT) are unique to VHT.