ETF comparison
SPYvsSPYM
Both US Large Cap.
State Street SPDR S&P 500 ETF Trust · State Street SPDR Portfolio S&P 500 ETF
Holdings overlap
472 positions appear in both funds. Buying equal dollars of SPY and SPYM would leave roughly89.8%of each dollar exposed to the same underlying securities.
Side by side
Sub-score comparison
Tracking quality isn't part of the composite — seewhat we don't scorefor why.
Cost difference
SPYM is 7 bps cheaper than SPY. On a $100,000 position that's about $74/yr more in fees for SPY.
Fee figure is the annual expense charged on $100,000. To see how the gap compounds over a multi-decade holding period, open thecost calculator pre-filled with SPY vs SPYM.
Top shared holdings
472 shared in total| # | Holding | In SPY | In SPYM | Overlap |
|---|---|---|---|---|
| 1 | NVIDIA CORP | 8.29% | 7.51% | 7.51% |
| 2 | APPLE INC | 7.22% | 6.59% | 6.59% |
| 3 | MICROSOFT CORP | 5.68% | 4.29% | 4.29% |
| 4 | AMAZON.COM INC | 3.80% | 3.62% | 3.62% |
| 5 | ALPHABET INC CL A | 3.01% | 3.25% | 3.01% |
| 6 | BROADCOM INC | 2.53% | 2.77% | 2.53% |
| 7 | ALPHABET INC CL C | 2.40% | 2.59% | 2.40% |
| 8 | META PLATFORMS INC CLASS A | 2.01% | 1.92% | 1.92% |
| 9 | MICRON TECHNOLOGY INC | 1.62% | 2.02% | 1.62% |
| 10 | TESLA INC | 1.59% | 1.83% | 1.59% |
| 11 | BERKSHIRE HATHAWAY INC CL B | 1.40% | 1.42% | 1.40% |
| 12 | ELI LILLY + CO | 1.37% | 1.47% | 1.37% |
Only in SPY
32 total- EXXONMOBIL HOLDINGS CORP1.01%
- LINDE PLC0.33%
- SEAGATE TECHNOLOGY HOLDINGS0.27%
- EATON CORP PLC0.23%
- CHUBB LTD0.19%
- MEDTRONIC PLC0.18%
- ACCENTURE PLC CL A0.18%
- TRANE TECHNOLOGIES PLC0.15%
- JOHNSON CONTROLS INTERNATION0.13%
- AON PLC CLASS A0.10%
Only in SPYM
35 total- Exxon Mobil Corp0.88%
- Linde PLC0.37%
- Seagate Technology Holdings PLC0.34%
- Eaton Corp PLC0.26%
- Chubb Ltd0.19%
- Trane Technologies PLC0.17%
- Medtronic PLC0.16%
- Johnson Controls International plc0.14%
- Royal Caribbean Cruises Ltd0.12%
- Accenture PLC0.12%
Open SPY or SPYM at a brokerage
Both funds trade commission-free at major US brokerages.
Affiliate links — opening an account through these earns PlainIndex a one-time referral. Scoring is computed before any affiliate consideration; see our methodologyand funding disclosure.
Holdings overlap is the sum of min(weight_a, weight_b) over positions matched on ISIN (CUSIP fallback). Methodology: see/methodology/.
Comparing two funds doesn't endorse swapping one for the other. Tax-lot history, account type, and personal goals matter — PlainIndex publishes data and methodology, not investment advice.