IBB vs LABU overlap - what they share and where they differ
IBB and LABU share 35.5% of their weight across 121 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.
IBB and LABU
35.5%
121 shared positions
IBB
iShares Biotechnology ETF
Reported positions cover 100% of the fund, 238 positions · Jun 30, 2026
Top 10: 44.7%·Holdings of IBB
LABU
Direxion Daily S&P Biotech Bull 3X Shares
Reported positions cover 67% of the fund, 147 positions · Jul 31, 2026
Top 10: 9.4%·Holdings of LABU
Reported positions cover IBB 100%, LABU 67% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
LABU vs IBB side by side
IBBiShares Biotechnology ETF
238
stock positions reported to the SEC
24.7% of its weight is in 117 names LABU does not hold
LABUDirexion Daily S&P Biotech Bull 3X Shares
147
stock positions reported to the SEC
8.9% of its weight is in 26 names IBB does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Healthcare: IBB has 31.6 points more of it.
The figures side by side
| IBB | LABU | |
|---|---|---|
| Filing date | Jun 30, 2026 | Jul 31, 2026 |
| Stock positions reported | 238 | 147 |
| Weight of the ten largest | 44.7% | 9.4% |
| Largest position | VRTX 8.1% | APOGEE THERAPEUTICS INC 1.1% |
| Held alone | 117 positions, 24.7% | 26 positions, 8.9% |
| Covered by stock positions | 100% | 67% |
Holdings they share
| Stock | In IBB | In LABU | Counted |
|---|---|---|---|
| RVMDRevolution Medicines, Inc. | 2.78% | 0.89% | 0.89% |
| REGNRegeneron Pharmaceuticals, Inc. | 4.91% | 0.87% | 0.87% |
| NTRANatera, Inc. | 2.89% | 0.84% | 0.84% |
| ARWRArrowhead Pharmaceuticals, Inc. | 0.84% | 0.82% | 0.82% |
| BBIOBridgebio Pharma, Inc. | 0.98% | 0.81% | 0.81% |
| MRNAModerna, Inc. | 1.98% | 0.81% | 0.81% |
| ROIVRoivant Sciences Ltd. | 1.43% | 0.81% | 0.81% |
| CYTKCytokinetics, Inc. | 0.79% | 0.79% | 0.79% |
| AMGNAmgen, Inc. | 7.83% | 0.78% | 0.78% |
| INCYIncyte Corp. | 1.75% | 0.77% | 0.77% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in IBB
Only in LABU
Questions people ask
Is IBB the same as LABU?
35.5% of their weight sits in the same 121 holdings. IBB also reports ARGX, ILMN, ONC, which the other does not. LABU also reports DNTH, VKTX, ABBV, which the other does not.
How is the overlap between IBB and LABU 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 IBB and 67% of LABU, so the number cannot exceed the smaller coverage.
Which holds more, LABU or IBB?
IBB reports 238 stock positions and LABU reports 147. 24.7% of IBB's weight sits in names LABU does not hold, and 8.9% of LABU's weight in names IBB does not hold. The ten largest positions are 44.7% of IBB and 9.4% of LABU.
How do IBB and LABU differ by sector?
The widest gap is Healthcare: IBB has 31.6 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.
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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.