IBB
HealthcareiShares Biotechnology ETF
iShares·Tracks NYSE Biotechnology Index·Inception Feb 5, 2001
Composite score
Based on a 0.44% expense ratio.
Based on $10.47B in net assets.
Top-10 holdings represent 54.3% of net assets.
Healthcare base · ETF wrapper · 0.20% TTM yield.
The composite is a weighted average of the four core sub-scores above (cost, tax efficiency, liquidity, concentration). Missing sub-scores fall back to the per-category median when the category has at least 50% data coverage, so funds without (e.g.) parsed N-PORT holdings aren't accidentally boosted by renormalization. Tracking quality is shown where computable but isn't currently part of the composite weighting. Seemethodologyfor formulas, thetracking-qualitypartial-coverage rationale, and the dimensions we deliberatelydon't score(methodology v0.5.1).
Use IBB in our tools
Tool · Look-through
See what IBB actually holds, in a portfolio
Add your other funds and weights; every underlying position is summed across the basket.
Tool · Cost
Compare IBB's fee against another fund
Compounds the 0.44% expense ratio against a peer over decades.
Tool · Overlap
Compare IBB's holdings with peers
Pairwise holdings heatmap, pre-loaded with similar Healthcare funds.
Tool · TLH
Find a tax-loss harvesting partner for IBB
Ranks every catalog fund by holdings overlap, flags wash-sale risk.
Tool · Placement
Where should this fund live across your accounts?
Asset-location optimizer — places each fund in taxable / tax-deferred / Roth.
Top holdings
| # | Holding | Weight |
|---|---|---|
| 1 | BlackRock Funds III | 11.66% |
| 2 | Vertex Pharmaceuticals, Inc. | 8.08% |
| 3 | Amgen, Inc. | 7.83% |
| 4 | Gilead Sciences, Inc. | 6.84% |
| 5 | Regeneron Pharmaceuticals, Inc. | 4.91% |
| 6 | Argenx SE | 3.76% |
| 7 | Alnylam Pharmaceuticals, Inc. | 3.12% |
| 8 | Natera, Inc. | 2.89% |
| 9 | Revolution Medicines, Inc. | 2.78% |
| 10 | Biogen, Inc. | 2.47% |
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