SPY vs RSP overlap
SPY and RSP overlap 43.9% by weight, across 503 shared holdings. SPY is shown using IVV, which tracks the same index.
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SPY files no portfolio holdings with the SEC; shown using IVV, which tracks the same index, as of June 30, 2026.
Top shared holdings
| Holding | SPY | RSP | Overlap |
|---|---|---|---|
| PALO ALTO NetworPANW | 0.43% | 0.24% | 0.24% |
| RTX Corp.RTX | 0.40% | 0.23% | 0.23% |
| Thermo FisherTMO | 0.29% | 0.23% | 0.23% |
| Arista NetworksANET | 0.27% | 0.23% | 0.23% |
| Abbott LabsABT | 0.24% | 0.23% | 0.23% |
| Crowdstrike HO-aCRWD | 0.30% | 0.23% | 0.23% |
| Schwab (Charles)SCHW | 0.23% | 0.23% | 0.23% |
| Mastercard Inc.-aMA | 0.64% | 0.23% | 0.23% |
| Microsoft Corp.MSFT | 4.29% | 0.23% | 0.23% |
| GE Vernova Inc.GEV | 0.49% | 0.22% | 0.22% |
| Amazon.COM Inc.AMZN | 3.61% | 0.22% | 0.22% |
| Amgen Inc.AMGN | 0.30% | 0.22% | 0.22% |
| JPMorgan ChaseJPM | 1.36% | 0.22% | 0.22% |
| Bank of AmericaBAC | 0.58% | 0.22% | 0.22% |
| VISA Inc.-Class aV | 0.88% | 0.22% | 0.22% |
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: SPY, IVV's SEC Form N-PORT, June 30, 2026; RSP, SEC Form N-PORT, July 31, 2026.
Largest institutions holding both
| Firm | SPY | RSP |
|---|---|---|
| JPMorgan Chase & Co | $35.3B | $414.7M |
| Morgan Stanley | $24.1B | $6.9B |
| Bank of America Corp. | $23.0B | $5.2B |
| Goldman Sachs Group Inc. | $23.5B | $1.7B |
| Susquehanna International Group, LLP | $10.9B | $40.8M |
| UBS Group AG | $9.2B | $1.7B |
| Northwestern Mutual Wealth Management Co | $4.7B | $6.0B |
| Wells Fargo & Company | $9.0B | $1.4B |
| Northern Trust Corp. | $10.3B | $13.9M |
| LPL Financial LLC | $7.4B | $1.4B |
| Gotham Asset Management, LLC | $8.5B | $75.5M |
| Royal Bank of Canada | $6.8B | $827.2M |
| Barclays PLC | $5.1B | $158.0M |
| Bank of Montreal | $4.8B | $84.4M |
| Raymond James Financial Inc. | $3.5B | $906.8M |
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: SPY institutional holders, RSP institutional holders.
Frequently asked questions
How much do SPY and RSP overlap?
43.9% by weight, with 503 holdings in common, using holdings for SPY as of June 30, 2026 and RSP as of July 31, 2026. The largest shared position is PANW.
Do institutions hold both SPY and RSP?
2,061 Form 13F filers report positions in both, out of 4,907 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%.