IYM vs SIL overlap - what they share and where they differ
IYM and SIL share 2.5% of their weight across 2 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.
IYM and SIL
2.5%
2 shared positions
IYM
iShares U.S. Basic Materials ETF
Reported positions cover 100% of the fund, 39 positions · Jul 31, 2026
Top 10: 67.5%·Holdings of IYM
SIL
Global X Silver Miners ETF
Reported positions cover 100% of the fund, 39 positions · Jul 31, 2026
Top 10: 76.3%·Holdings of SIL
Reported positions cover IYM 100%, SIL 100% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
SIL vs IYM side by side
IYMiShares U.S. Basic Materials ETF
39
stock positions reported to the SEC
97.3% of its weight is in 37 names SIL does not hold
SILGlobal X Silver Miners ETF
39
stock positions reported to the SEC
84.8% of its weight is in 37 names IYM does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Basic Materials: IYM has 8.1 points more of it.
The figures side by side
| IYM | SIL | |
|---|---|---|
| Filing date | Jul 31, 2026 | Jul 31, 2026 |
| Stock positions reported | 39 | 39 |
| Weight of the ten largest | 67.5% | 76.3% |
| Largest position | LIN 20.4% | WPM 22.4% |
| Held alone | 37 positions, 97.3% | 37 positions, 84.8% |
| Covered by stock positions | 100% | 100% |
Holdings they share
| Stock | In IYM | In SIL | Counted |
|---|---|---|---|
| CDECOEUR MINING, INC. | 1.60% | 10.59% | 1.60% |
| HLHECLA MINING COMPANY | 0.93% | 4.63% | 0.93% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in IYM
Only in SIL
Questions people ask
Is IYM the same as SIL?
2.5% of their weight sits in the same 2 holdings. IYM also reports LIN, NEM, FCX, which the other does not. SIL also reports WPM, PAAS, INDUSTRIAS PENOLES, S.A.B. DE C.V., which the other does not.
How is the overlap between IYM and SIL 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 IYM and 100% of SIL, so the number cannot exceed the smaller coverage.
Which holds more, SIL or IYM?
IYM reports 39 stock positions and SIL reports 39. 97.3% of IYM's weight sits in names SIL does not hold, and 84.8% of SIL's weight in names IYM does not hold. The ten largest positions are 67.5% of IYM and 76.3% of SIL.
How do IYM and SIL differ by sector?
The widest gap is Basic Materials: IYM has 8.1 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.
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.