IWR vs RSP overlap - what they share and where they differ
IWR and RSP share 47.0% of their weight across 302 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.
IWR and RSP
47.0%
302 shared positions
IWR
iShares Russell Mid-Cap ETF
Reported positions cover 100% of the fund, 812 positions · Jun 30, 2026
Top 10: 5.6%·Holdings of IWR
RSP
Invesco S&P 500 Equal Weight ETF
Reported positions cover 100% of the fund, 500 positions · Jul 31, 2026
Top 10: 2.6%·Holdings of RSP
Reported positions cover IWR 100%, RSP 100% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
RSP vs IWR side by side
IWRiShares Russell Mid-Cap ETF
812
stock positions reported to the SEC
38.2% of its weight is in 510 names RSP does not hold
RSPInvesco S&P 500 Equal Weight ETF
500
stock positions reported to the SEC
39.4% of its weight is in 198 names IWR does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Financial Services: RSP has 2.4 points more of it.
The figures side by side
| IWR | RSP | |
|---|---|---|
| Filing date | Jun 30, 2026 | Jul 31, 2026 |
| Stock positions reported | 812 | 500 |
| Weight of the ten largest | 5.6% | 2.6% |
| Largest position | DDOG 0.6% | PYPL 0.3% |
| Held alone | 510 positions, 38.2% | 198 positions, 39.4% |
| Covered by stock positions | 100% | 100% |
Holdings they share
| Stock | In IWR | In RSP | Counted |
|---|---|---|---|
| PYPLPayPal Holdings, Inc. | 0.28% | 0.27% | 0.27% |
| CMGChipotle Mexican Grill, Inc. | 0.31% | 0.24% | 0.24% |
| GRMNGarmin Ltd. | 0.28% | 0.24% | 0.24% |
| XYZBlock, Inc. | 0.29% | 0.24% | 0.24% |
| ALLAllstate Corp. (The) | 0.44% | 0.23% | 0.23% |
| AMPAmeriprise Financial, Inc. | 0.30% | 0.23% | 0.23% |
| AXONAxon Enterprise, Inc. | 0.31% | 0.23% | 0.23% |
| DDOGDatadog, Inc. | 0.62% | 0.23% | 0.23% |
| IQVIQVIA Holdings, Inc. | 0.23% | 0.25% | 0.23% |
| IRIngersoll Rand, Inc. | 0.23% | 0.23% | 0.23% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in IWR
Only in RSP
Questions people ask
Is IWR the same as RSP?
47.0% of their weight sits in the same 302 holdings. IWR also reports SNOW, NET, ALAB, which the other does not. RSP also reports DASH, PANW, REGN, which the other does not.
How is the overlap between IWR and RSP 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 IWR and 100% of RSP, so the number cannot exceed the smaller coverage.
Which holds more, RSP or IWR?
IWR reports 812 stock positions and RSP reports 500. 38.2% of IWR's weight sits in names RSP does not hold, and 39.4% of RSP's weight in names IWR does not hold. The ten largest positions are 5.6% of IWR and 2.6% of RSP.
How do IWR and RSP differ by sector?
The widest gap is Financial Services: RSP has 2.4 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.