IYM vs NOBL overlap - what they share and where they differ
IYM and NOBL share 8.7% of their weight across 6 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 NOBL
8.7%
6 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
NOBL
ProShares S&P 500 Dividend Aristocrats ETF
Reported positions cover 100% of the fund, 69 positions · May 31, 2026
Top 10: 16.5%·Holdings of NOBL
Reported positions cover IYM 100%, NOBL 100% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
NOBL vs IYM side by side
IYMiShares U.S. Basic Materials ETF
39
stock positions reported to the SEC
57.6% of its weight is in 33 names NOBL does not hold
NOBLProShares S&P 500 Dividend Aristocrats ETF
69
stock positions reported to the SEC
91.0% of its weight is in 63 names IYM does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Basic Materials: IYM has 78.7 points more of it.
The figures side by side
| IYM | NOBL | |
|---|---|---|
| Filing date | Jul 31, 2026 | May 31, 2026 |
| Stock positions reported | 39 | 69 |
| Weight of the ten largest | 67.5% | 16.5% |
| Largest position | LIN 20.4% | NUE 1.8% |
| Held alone | 33 positions, 57.6% | 63 positions, 91.0% |
| Covered by stock positions | 100% | 100% |
Holdings they share
| Stock | In IYM | In NOBL | Counted |
|---|---|---|---|
| NUENUCOR CORPORATION | 4.53% | 1.76% | 1.76% |
| LINLINDE PUBLIC LIMITED COMPANY | 20.35% | 1.47% | 1.47% |
| FASTFASTENAL COMPANY | 4.48% | 1.42% | 1.42% |
| APDAIR PRODUCTS AND CHEMICALS, INC. | 5.01% | 1.39% | 1.39% |
| ECLECOLAB INC. | 6.44% | 1.39% | 1.39% |
| ALBALBEMARLE CORPORATION | 1.45% | 1.30% | 1.30% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in IYM
Only in NOBL
Questions people ask
Is IYM the same as NOBL?
8.7% of their weight sits in the same 6 holdings. IYM also reports NEM, FCX, AU, which the other does not. NOBL also reports WST, IBM, ADM, which the other does not.
How is the overlap between IYM and NOBL 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 NOBL, so the number cannot exceed the smaller coverage.
Which holds more, NOBL or IYM?
IYM reports 39 stock positions and NOBL reports 69. 57.6% of IYM's weight sits in names NOBL does not hold, and 91.0% of NOBL's weight in names IYM does not hold. The ten largest positions are 67.5% of IYM and 16.5% of NOBL.
How do IYM and NOBL differ by sector?
The widest gap is Basic Materials: IYM has 78.7 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.