ETF comparison
SPY vs SPYM
Both US Large Cap.
State Street SPDR S&P 500 ETF Trust · State Street SPDR Portfolio S&P 500 ETF
Holdings overlap
465 positions appear in both funds. Buying equal dollars of SPY and SPYM would leave roughly 87.2% of each dollar exposed to the same underlying securities.
Unmatched is the part of a fund's weight the other fund doesn't match: names only it holds, plus any extra weight it puts in names both funds hold.
Side by side
Sub-score comparison
Tracking quality isn't part of the composite — see what we don't score for 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 the cost calculator pre-filled with SPY vs SPYM.
Top shared holdings
465 shared in total| # | Holding | In SPY | In SPYM | Overlap |
|---|---|---|---|---|
| 1 | NVIDIA CORP | 7.30% | 7.51% | 7.30% |
| 2 | APPLE INC | 7.69% | 6.59% | 6.59% |
| 3 | MICROSOFT CORP | 6.22% | 4.29% | 4.29% |
| 4 | AMAZON.COM INC | 3.94% | 3.62% | 3.62% |
| 5 | ALPHABET INC CL A | 2.56% | 3.25% | 2.56% |
| 6 | BROADCOM INC | 2.33% | 2.77% | 2.33% |
| 7 | ALPHABET INC CL C | 2.06% | 2.59% | 2.06% |
| 8 | META PLATFORMS INC CLASS A | 2.09% | 1.92% | 1.92% |
| 9 | TESLA INC | 1.64% | 1.83% | 1.64% |
| 10 | ELI LILLY + CO | 1.71% | 1.47% | 1.47% |
| 11 | BERKSHIRE HATHAWAY INC CL B | 1.63% | 1.42% | 1.42% |
| 12 | JPMORGAN CHASE + CO | 1.41% | 1.36% | 1.36% |
Only in SPY
39 total- EXXONMOBIL HOLDINGS CORP 1.05%
- LINDE PLC 0.36%
- ACCENTURE PLC CL A 0.24%
- EATON CORP PLC 0.21%
- CHUBB LTD 0.20%
- MEDTRONIC PLC 0.19%
- SEAGATE TECHNOLOGY HOLDINGS 0.19%
- TRANE TECHNOLOGIES PLC 0.14%
- JOHNSON CONTROLS INTERNATION 0.13%
- ROYAL CARIBBEAN CRUISES LTD 0.12%
Only in SPYM
41 total- Exxon Mobil Corp 0.88%
- Linde PLC 0.37%
- Seagate Technology Holdings PLC 0.34%
- Eaton Corp PLC 0.26%
- Chubb Ltd 0.19%
- Trane Technologies PLC 0.17%
- Medtronic PLC 0.16%
- Johnson Controls International plc 0.14%
- Royal Caribbean Cruises Ltd 0.12%
- Accenture PLC 0.12%
Related comparisons
More comparisons with SPY
- SPY vs IVV · iShares Core S&P 500 ETF 87.2%
- SPY vs DFUS · Dimensional U.S. Equity Market ETF 87.2%
- SPY vs VTHR · Vanguard Russell 3000 Index Fund ETF Shares 86.8%
- SPY vs SCHB · Schwab U.S. Broad Market ETF 85.2%
- SPY vs IWB · iShares Russell 1000 ETF 85.1%
- SPY vs DFAU · Dimensional US Core Equity Market ETF 83.2%
More comparisons with SPYM
- SPYM vs SCHB · Schwab U.S. Broad Market ETF 86.2%
- SPYM vs VTHR · Vanguard Russell 3000 Index Fund ETF Shares 85.4%
- SPYM vs DFAU · Dimensional US Core Equity Market ETF 82.0%
- SPYM vs MGC · Vanguard Morningstar Mega Cap ETF 80.2%
- SPYM vs ESGV · Vanguard ESG U.S. Stock ETF 79.4%
- SPYM vs ESGU · iShares ESG Aware MSCI USA ETF 76.8%
Percentages are holdings overlap with the named fund.
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 methodology and 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.