SPYM vs SPY overlap
SPYM and SPY overlap 99.8% 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 | SPYM | SPY | Overlap |
|---|---|---|---|
| Nvidia Corp.NVDA | 7.51% | 7.51% | 7.51% |
| Apple Inc.AAPL | 6.58% | 6.58% | 6.58% |
| Microsoft Corp.MSFT | 4.29% | 4.29% | 4.29% |
| Amazon.COM Inc.AMZN | 3.62% | 3.61% | 3.61% |
| Alphabet Inc.-aGOOGL | 3.25% | 3.25% | 3.25% |
| Broadcom Inc.AVGO | 2.77% | 2.77% | 2.77% |
| Alphabet Inc.-CGOOG | 2.59% | 2.59% | 2.59% |
| Micron TechMU | 2.02% | 2.02% | 2.02% |
| META Platforms-aMETA | 1.92% | 1.92% | 1.92% |
| Tesla Inc.TSLA | 1.83% | 1.83% | 1.83% |
| ELI Lilly & CoLLY | 1.47% | 1.47% | 1.47% |
| ADV Micro DeviceAMD | 1.47% | 1.47% | 1.47% |
| Berkshire HATH-BBRK/B | 1.42% | 1.42% | 1.42% |
| JPMorgan ChaseJPM | 1.36% | 1.36% | 1.36% |
| Intel Corp.INTC | 1.02% | 1.02% | 1.02% |
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: SPYM, SEC Form N-PORT, June 30, 2026; SPY, IVV's SEC Form N-PORT, June 30, 2026.
Largest institutions holding both
| Firm | SPYM | SPY |
|---|---|---|
| JPMorgan Chase & Co | $5.9B | $35.3B |
| Bank of America Corp. | $4.8B | $23.0B |
| Morgan Stanley | $1.7B | $24.1B |
| Goldman Sachs Group Inc. | $1.8B | $23.5B |
| Jones Financial Companies LLLP | $14.6B | $761.2M |
| LPL Financial LLC | $5.6B | $7.4B |
| Susquehanna International Group, LLP | $27.7M | $10.9B |
| Northern Trust Corp. | $8.2M | $10.3B |
| Wells Fargo & Company | $796.3M | $9.0B |
| UBS Group AG | $230.4M | $9.2B |
| Betterment LLC | $8.6B | $17.5M |
| Gotham Asset Management, LLC | $1.3M | $8.5B |
| Royal Bank of Canada | $747.0M | $6.8B |
| HRT Financial LP | $3.0M | $5.6B |
| Creative Planning | $3.1B | $2.2B |
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: SPYM institutional holders, SPY institutional holders.
Frequently asked questions
How much do SPYM and SPY overlap?
99.8% by weight, with 503 holdings in common, using holdings for SPYM as of June 30, 2026 and SPY as of June 30, 2026. The largest shared position is NVDA.
Do institutions hold both SPYM and SPY?
1,522 Form 13F filers report positions in both, out of 4,854 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%.