IBB vs VOT: Holdings Overlap
iShares · 254 holdings · $9.3B · as of 2026-03-31
VOTVanguard Mid-cap Growth Index Fund
Vanguard · 130 holdings · $19.9B · as of 2026-03-31
How similar are IBB and VOT?
iShares Biotechnology ETF (IBB, by iShares) holds 254 positions; Vanguard Mid-cap Growth Index Fund (VOT, by Vanguard) holds 130. They have 2 holdings in common, and by portfolio weight the two funds are 1.6% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 1.6%Sum of the smaller weight of each shared holding
- Shared Holdings
- 2IBB holds 254 · VOT holds 130
- Weight in Shared Holdings
- IBB 7%·VOT 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 IBB
252 of 254 positions (92.7% of the fund) are not held by VOT. Showing the top 30 by weight.
Only in VOT
128 of 130 positions (98.3% of the fund) are not held by IBB. Showing the top 30 by weight.
Sector Breakdown
| Sector | IBB | VOT |
|---|---|---|
| Health Care | 91.0% | 10.5% |
| Industrials | 0.0% | 25.1% |
| Information Technology | 0.0% | 22.5% |
| Consumer Discretionary | 0.0% | 15.2% |
| Financials | 0.0% | 8.5% |
| Other Sectors | 0.0% | 18.1% |
| 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 VOT).
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% |
| VOT | +1.9% | +10.1% | +7.1% | +14.7% | +5.4% | +11.9% | 0.59% |
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 VOT →
Shared Holdings(2)
Frequently Asked Questions
How much do IBB and VOT overlap?
IBB and VOT overlap by 1.6% of portfolio weight. They share 2 holdings (IBB holds 254 positions and VOT holds 130), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IBB and VOT?
The two portfolios are 1.6% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What are the biggest shared holdings of IBB and VOT?
The largest positions held by both funds are ALNY and INSM. Together the top 2 shared positions account for 100% of the total overlap.
What does IBB own that VOT doesn't?
252 positions (92.7% of IBB) are unique to IBB, led by GILD, AMGN and VRTX. In the other direction, 128 positions (98.3% of VOT) are unique to VOT.