IYH vs XBI overlap - what they share and where they differ
IYH and XBI share 10.2% of their weight across 23 common positions, read from what each fund reported to the SEC.
Each week Ploutos reads the reported positions of the largest US equity ETFs and measures, pair by pair, the weight they share: for every stock both funds hold, the smaller of the two weights counts. Two funds tracking the same index land near 100%. A sector fund inside a broad index fund lands at roughly that sector's weight.
IYH and XBI
10.2%
23 shared positions
IYH
iShares U.S. Healthcare ETF
Reported positions cover 100% of the fund, 102 positions · Apr 30, 2026
Top 10: 57.4%·Holdings of IYH
XBI
State Street(R) SPDR(R) S&P(R) Biotech ETF
Reported positions cover 100% of the fund, 149 positions · Jun 30, 2026
Top 10: 13.3%·Holdings of XBI
Reported positions cover IYH 100%, XBI 100% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
XBI vs IYH side by side
IYHiShares U.S. Healthcare ETF
102
stock positions reported to the SEC
78.1% of its weight is in 79 names XBI does not hold
XBIState Street(R) SPDR(R) S&P(R) Biotech ETF
149
stock positions reported to the SEC
75.8% of its weight is in 126 names IYH does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Healthcare: XBI has 1.1 points more of it.
The figures side by side
| IYH | XBI | |
|---|---|---|
| Filing date | Apr 30, 2026 | Jun 30, 2026 |
| Stock positions reported | 102 | 149 |
| Weight of the ten largest | 57.4% | 13.3% |
| Largest position | LLY 13.7% | APGE 1.5% |
| Held alone | 79 positions, 78.1% | 126 positions, 75.8% |
| Covered by stock positions | 100% | 100% |
Holdings they share
| Stock | In IYH | In XBI | Counted |
|---|---|---|---|
| VRTXVERTEX PHARMACEUTICALS INCORPORATED | 1.99% | 1.06% | 1.06% |
| ABBVABBVIE INC. | 6.86% | 1.04% | 1.04% |
| AMGNAMGEN INC. | 3.41% | 0.99% | 0.99% |
| GILDGILEAD SCIENCES, INC. | 2.99% | 0.96% | 0.96% |
| REGNREGENERON PHARMACEUTICALS, INC. | 1.32% | 0.96% | 0.96% |
| ALNYALNYLAM PHARMACEUTICALS, INC. | 0.72% | 0.96% | 0.72% |
| INSMINSMED INCORPORATED | 0.52% | 1.08% | 0.52% |
| BIIBBIOGEN INC. | 0.51% | 1.03% | 0.51% |
| NTRANATERA, INC. | 0.50% | 1.16% | 0.50% |
| RVMDREVOLUTION MEDICINES, INC. | 0.47% | 1.20% | 0.47% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in IYH
Only in XBI
Questions people ask
Is IYH the same as XBI?
10.2% of their weight sits in the same 23 holdings. IYH also reports LLY, JNJ, UNH, which the other does not. XBI also reports APGE, TWST, ORKA, which the other does not.
How is the overlap between IYH and XBI measured?
For every stock both funds report, the smaller of the two weights counts, and the sum is the overlap. The reported positions cover 100% of IYH and 100% of XBI, so the number cannot exceed the smaller coverage.
Which holds more, XBI or IYH?
IYH reports 102 stock positions and XBI reports 149. 78.1% of IYH's weight sits in names XBI does not hold, and 75.8% of XBI's weight in names IYH does not hold. The ten largest positions are 57.4% of IYH and 13.3% of XBI.
How do IYH and XBI differ by sector?
The widest gap is Healthcare: XBI has 1.1 points more of it. Sectors come from each holding's SIC code in its SEC record, summed by the weight the fund reports.
Where do the numbers come from?
From each fund's own N-PORT filing to the SEC, which lists every position and its weight. The comparison uses every equity position the fund reports; cash, futures and bonds are not counted, which is why a coverage figure sits next to every result. Holdings change between filings.
Other pairs with these funds
IYH against other funds in the table
Add a third fund in the tool·All fund pairs
Descriptive data from public SEC filings. Nothing on this page is a recommendation to buy, sell or hold any fund or stock, and holdings change between filings.