ETF comparison
IUSG vs SPY
US Large Cap Growth vs US Large Cap.
iShares Core S&P U.S. Growth ETF · State Street SPDR S&P 500 ETF Trust
Holdings overlap
138 positions appear in both funds. Buying equal dollars of IUSG and SPY would leave roughly 64.5% 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
IUSG is 5 bps cheaper than SPY. On a $100,000 position that's about $54/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 IUSG vs SPY.
Top shared holdings
138 shared in total| # | Holding | In IUSG | In SPY | Overlap |
|---|---|---|---|---|
| 1 | NVIDIA CORP | 12.95% | 8.50% | 8.50% |
| 2 | MICROSOFT CORP | 7.41% | 5.77% | 5.77% |
| 3 | APPLE INC | 5.68% | 7.32% | 5.68% |
| 4 | AMAZON.COM INC | 3.31% | 3.71% | 3.31% |
| 5 | ALPHABET INC | 5.60% | 3.03% | 3.03% |
| 6 | BROADCOM INC | 4.78% | 2.54% | 2.54% |
| 7 | ALPHABET INC | 4.46% | 2.43% | 2.43% |
| 8 | META PLATFORMS INC | 3.31% | 2.41% | 2.41% |
| 9 | MICRON TECHNOLOGY INC | 3.48% | 1.82% | 1.82% |
| 10 | TESLA INC | 1.96% | 1.57% | 1.57% |
| 11 | ADVANCED MICRO DEVICES INC | 2.53% | 1.55% | 1.55% |
| 12 | BERKSHIRE HATHAWAY INC | 2.45% | 1.41% | 1.41% |
Only in IUSG
252 total- SEAGATE TECHNOLOGY HOLDINGS PLC 0.37%
- ROYAL CARIBBEAN CRUISES LTD 0.21%
- FLEX LTD 0.16%
- JOHNSON CONTROLS INTERNATIONAL PLC 0.16%
- TRANE TECHNOLOGIES PLC 0.15%
- TE CONNECTIVITY PLC 0.11%
- CARNIVAL CORP LTD 0.10%
- TWILIO INC 0.08%
- CARPENTER TECHNOLOGY CORP 0.08%
- CURTISS-WRIGHT CORP 0.07%
Only in SPY
367 total- EXXONMOBIL HOLDINGS CORP 1.01%
- INTEL CORP 0.89%
- WALMART INC 0.70%
- CHEVRON CORP 0.61%
- COSTCO WHOLESALE CORP 0.61%
- MERCK + CO. INC. 0.53%
- BANK OF AMERICA CORP 0.52%
- PROCTER + GAMBLE CO/THE 0.51%
- UNITEDHEALTH GROUP INC 0.50%
- HOME DEPOT INC 0.42%
Related comparisons
More comparisons with IUSG
- IUSG vs ONEQ · Fidelity Nasdaq Composite Index ETF 63.9%
- IUSG vs SCHB · Schwab U.S. Broad Market ETF 62.6%
- IUSG vs ITOT · iShares Core S&P Total U.S. Stock Market ETF 62.6%
- IUSG vs VTI · Vanguard Morningstar Total Stock Market ETF 62.5%
- IUSG vs FBCG · Fidelity Blue Chip Growth ETF 61.1%
- IUSG vs QQQM · Invesco NASDAQ 100 ETF 56.5%
More comparisons with SPY
- SPY vs XLG · Invesco S&P 500 Top 50 ETF 64.1%
- SPY vs DYNF · iShares U.S. Equity Factor Rotation Active ETF 62.0%
- SPY vs PRF · Invesco RAFI US 1000 ETF 61.9%
- SPY vs VONG · Vanguard Russell 1000 Growth Index Fund ETF Shares 59.8%
- SPY vs FNDX · Schwab Fundamental U.S. Large Company ETF 59.4%
- SPY vs VUG · Vanguard Morningstar Growth ETF 59.0%
Percentages are holdings overlap with the named fund.
Open IUSG or SPY 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.