Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
IBB vs IYE: how they differ
IBB and IYE hold 0% of their weight in the same names, and IYE returned more over the year.
iShares Biotechnology ETF and iShares U.S. Energy ETF.
What they hold in common
By the books each fund has filed, IBB and IYE hold 0% of their money in the same securities at the same weight.
| Only in IBB | Only in IYE |
|---|---|
| Vertex Pharmaceuticals, Inc. 8.09% | EXXON MOBIL CORPORATION 21.74% |
| Amgen, Inc. 7.84% | CHEVRON CORPORATION 15.41% |
| Gilead Sciences, Inc. 6.85% | CONOCOPHILLIPS 6.51% |
| Regeneron Pharmaceuticals, Inc. 4.91% | THE WILLIAMS COMPANIES, INC. 4.38% |
| Argenx SE 3.76% | SLB N.V. 3.95% |
| Alnylam Pharmaceuticals, Inc. 3.12% | EOG RESOURCES, INC. 3.56% |
| Natera, Inc. 2.89% | VALERO ENERGY CORPORATION 3.54% |
| Revolution Medicines, Inc. 2.78% | MARATHON PETROLEUM CORPORATION 3.44% |
Weight overlap is an ETFIQ calculation: for every security both funds hold, the smaller of the two weights, summed. Above 50%, holding both is close to holding one of them twice. Holdings dated Apr 30, 2026 and Jun 30, 2026.
| IBB iShares Biotechnology ETF | IYE iShares U.S. Energy ETF | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | iShares | iShares |
| What it is | Biotechnology | U.S. Energy |
| Total return, 1 year | +41.5% | +48.8% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | +24.0 pts | +31.3 pts |
| Expense ratio | 0.44% | 0.37% |
| Already in the S&P 500 | 35.6% | 89.0% |
| Holdings | 248 | 38 |
IBB in plain words
IBB is an index equity fund tracking the Biotechnology. Over the year to Sep 11, 2026 it returned +41.5% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.44% a year. By its holdings filed for Jun 30, 2026, 36% of the fund by weight is stocks the S&P 500 also holds, across 248 positions, with the top ten at 44.8%. It sat 6.5% below its high of Aug 19, 2026 on Sep 11, 2026.
IYE in plain words
IYE is an index equity fund tracking the U.S. Energy. Over the year to Sep 11, 2026 it returned +48.8% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.37% a year. By its holdings filed for Apr 30, 2026, 89% of the fund by weight is stocks the S&P 500 also holds, across 38 positions, with the top ten at 69.0%.
Questions people ask
- Which returned more over the last year, IBB or IYE?
- In the year to Sep 12, 2026, with distributions reinvested, IBB returned +41.5% and IYE returned +48.8%, so IYE returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, IBB or IYE?
- IBB charges 0.44% a year and IYE charges 0.37%, so IYE is cheaper. Fees come from each fund's prospectus.
- How much do IBB and IYE overlap with the S&P 500?
- By their latest filed holdings, 36% of IBB and 89% of IYE by weight is stocks the S&P 500 already holds. Between the two funds, 0% of their books are the same securities at the same weight.
Other comparisons
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Where these figures came from
ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement.
Cite this page. ETFIQ, IBB against IYE, data as of Sep 12, 2026. https://etfiq.com/compare/any/IBB-IYE Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources