AEMG vs SPY
Harbor AlphaEdge Mid Cap Growth ETF vs State Street SPDR S&P 500 ETF Trust
Which is better, AEMG or SPY?
Mid Cap Growth against Large Cap Blend.
SPY has a lower expense ratio. AEMG is less concentrated, with 28.5% of the fund in its ten largest positions against 37.8%.
MarketXLS is not an investment adviser. This comparison is generated automatically from market data and is for information only. A Best mark means the better reading on that one measure, not a recommendation to buy.
Side-by-Side Comparison
| Metric | AEMG | SPY |
|---|---|---|
| Expense Ratio | 0.38% | 0.09%Best |
| AUM | - | $804.7B |
| Dividend Yield | 0.00% | 0.98% |
| Holdings | 115 | 505 |
| YTD Return | -4.48% | +10.96%Best |
| 1Y Return | - | +15.52% |
| 3Y Return (annualized) | - | +20.73% |
| 5Y Return (annualized) | - | +12.53% |
| Top 10 Weight | 28.5%Best | 37.8% |
| Fund Family | Harbor Funds | State Street Investment Management |
| Category | Equity | Equity |
| Style | Mid Cap Growth | Large Cap Blend |
| Inception | Aug 26, 2026 | Jan 22, 1993 |
Not shown on this pair: Volatility (annualized), Max Drawdown, $10,000 over the window.
AEMG vs SPY growth
Month-end closes. Both lines start at 0% in the first month shown, so the gap between them is the difference in growth across that window. The full view is available from the range buttons; it is not the opening view here because over the whole period one of these two funds moves so much further than the other that its line would sit flat on the axis.
AEMG vs SPY Performance
Harbor AlphaEdge Mid Cap Growth ETF (AEMG) is an ETF from Harbor Funds and State Street SPDR S&P 500 ETF Trust (SPY) is an ETF from State Street Investment Management. Year to date, AEMG is down 4.48% versus a gain of 10.96% for SPY.
Past performance does not guarantee future results.
Fees and Cost Over Time
AEMG charges 0.38% per year while SPY charges 0.09%. On a $10,000 position that is $38 vs $9 annually, a gap of $29 per year that compounds over a long holding period. On income, AEMG currently yields 0.00% against 0.98% for SPY.
Holdings Overlap
49.5% of AEMG's money is in holdings SPY also owns. 2.7% of SPY's money is in holdings AEMG also owns.
The two portfolios partly overlap.
46 positions in common, counted across the 115 positions we hold weights for in AEMG and 504 in SPY, against full books of 115 and 505.
What only one of them owns
Our book lists 451 positions for SPY that do not appear in our book for AEMG (96.7% of the fund), and 62 for AEMG that do not appear in SPY (45.0%).
Some of those will be the same company recorded under a different code in one of the two books, so the real difference in what you would own is no larger than this and may be smaller. We do not name the individual positions here for that reason.
Top Shared Holdings
| Stock | Weight in AEMG | Weight in SPY | Difference |
|---|---|---|---|
| FIXComfort Systems USA Inc. | 4.31% | 0.08% | 4.23% |
| MPCMarathon Petroleum Corp | 3.29% | 0.17% | 3.12% |
| AMPAmeriprise Financial Inc | 3.06% | 0.07% | 2.99% |
| TERTeradyne Inc - Common | 2.74% | 0.08% | 2.66% |
| EXPEExpedia Group Inc (consumer Discretionary) | 2.74% | 0.05% | 2.69% |
| NTAPNetapp Inc | 2.54% | 0.06% | 2.48% |
| DDOGDatadog Inc | 2.26% | 0.11% | 2.15% |
| DXCMDexcom Inc. | 2.14% | 0.05% | 2.09% |
| CMGChipotle Mexican Grill Inc. Class A | 1.98% | 0.07% | 1.91% |
| STTState Street Corp. | 1.69% | 0.08% | 1.61% |
49.5% of AEMG is already inside SPY.
You probably hold more than these two. Add the rest and see how much of the whole book is the same companies twice.
Free for up to 10 holdings. No account needed.
Frequently Asked Questions
Which is cheaper, AEMG or SPY?
AEMG has an expense ratio of 0.38% while SPY charges 0.09%. SPY is the cheaper option, by $29 a year on a $10,000 investment.
What is the holdings overlap between AEMG and SPY?
49.5% of AEMG's money is in holdings SPY also owns. 2.7% of SPY's is in holdings AEMG also owns. They hold 46 positions in common, counted across the 115 positions we hold weights for in AEMG and 504 in SPY.
Which pays a higher dividend, AEMG or SPY?
AEMG yields 0.00% while SPY yields 0.98%, so SPY currently pays the higher dividend yield.
Is SPY better than AEMG?
SPY has a lower expense ratio. AEMG is less concentrated, with 28.5% of the fund in its ten largest positions against 37.8%. Which one suits a particular account depends on what it is for. This is information, not a recommendation.