RSP vs IWF overlap
RSP and IWF overlap 19.1% by weight, across 177 shared holdings.
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Top shared holdings
| Holding | RSP | IWF | Overlap |
|---|---|---|---|
| PALO ALTO NetworPANW | 0.24% | 0.81% | 0.24% |
| Booking HoldingsBKNG | 0.23% | 0.41% | 0.23% |
| Arista NetworksANET | 0.23% | 0.53% | 0.23% |
| Crowdstrike HO-aCRWD | 0.23% | 0.57% | 0.23% |
| Datadog Inc.-aDDOG | 0.23% | 0.25% | 0.23% |
| Mastercard Inc.-aMA | 0.23% | 1.23% | 0.23% |
| Microsoft Corp.MSFT | 0.23% | 4.11% | 0.23% |
| Fortinet Inc.FTNT | 0.23% | 0.28% | 0.23% |
| GE Vernova Inc.GEV | 0.22% | 0.94% | 0.22% |
| Amazon.COM Inc.AMZN | 0.22% | 0.57% | 0.22% |
| Amgen Inc.AMGN | 0.22% | 0.41% | 0.22% |
| VISA Inc.-Class aV | 0.22% | 1.68% | 0.22% |
| Howmet AerospaceHWM | 0.22% | 0.32% | 0.22% |
| General ElectricGE | 0.22% | 1.14% | 0.22% |
| Western DigitalWDC | 0.21% | 0.64% | 0.21% |
Overlap by weight adds up the smaller weight of each holding the funds share, so 100% means identical portfolios. Long securities only: derivatives and cash vehicles are left out. Sources: RSP, SEC Form N-PORT, July 31, 2026; IWF, SEC Form N-PORT, June 30, 2026.
Largest institutions holding both
| Firm | RSP | IWF |
|---|---|---|
| Morgan Stanley | $6.9B | $14.8B |
| Bank of America Corp. | $5.2B | $13.5B |
| Northwestern Mutual Wealth Management Co | $6.0B | $335.5M |
| Goldman Sachs Group Inc. | $1.7B | $3.4B |
| FMR LLC | $37.5M | $4.1B |
| UBS Group AG | $1.7B | $2.3B |
| Wells Fargo & Company | $1.4B | $2.2B |
| JPMorgan Chase & Co | $414.7M | $3.2B |
| LPL Financial LLC | $1.4B | $1.9B |
| Envestnet Asset Management Inc. | $416.7M | $2.6B |
| Raymond James Financial Inc. | $906.8M | $1.7B |
| Northern Trust Corp. | $13.9M | $2.5B |
| Royal Bank of Canada | $827.2M | $928.8M |
| PNC Financial Services Group, Inc. | $113.9M | $1.5B |
| Truist Financial Corp. | $578.0M | $1.0B |
This compares who owns the funds, not what the funds hold. From SEC Form 13F, for managers with $100M+ in US securities.
Who owns them: RSP institutional holders, IWF institutional holders.
Frequently asked questions
How much do RSP and IWF overlap?
19.1% by weight, with 177 holdings in common, using holdings for RSP as of July 31, 2026 and IWF as of June 30, 2026. The largest shared position is PANW.
Do institutions hold both RSP and IWF?
1,395 Form 13F filers report positions in both, out of 3,425 that report either one.
How is overlap by weight worked out?
For each holding the two funds share, take the smaller of the two weights, then add those up. Identical portfolios score 100%.