AEMC vs TMID
Harbor AlphaEdge Mid Cap Core ETF vs T. Rowe Price Mid-Cap Equity Research ETF
Which is better, AEMC or TMID?
AEMC costs less.
AEMC has a lower expense ratio. TMID is less concentrated, with 9.6% of the fund in its ten largest positions against 27.0%.
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 | AEMC | TMID |
|---|---|---|
| Expense Ratio | 0.35%Best | 0.47% |
| AUM | $2M | $12M |
| Dividend Yield | 0.00% | 0.00% |
| Holdings | 198 | 391 |
| YTD Return | -1.35% | +0.46%Best |
| Top 10 Weight | 27.0% | 9.6%Best |
| Fund Family | Harbor Funds | T.Rowe Price |
| Category | Equity | Equity |
| Style | Mid Cap Blend | Mid Cap Blend |
| Inception | Aug 26, 2026 | Sep 16, 2026 |
Not shown on this pair: 1Y Return, 3Y Return (annualized), 5Y Return (annualized), Volatility (annualized), Max Drawdown, $10,000 over the window.
AEMC vs TMID 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.
AEMC vs TMID Performance
Harbor AlphaEdge Mid Cap Core ETF (AEMC) is an ETF from Harbor Funds and T. Rowe Price Mid-Cap Equity Research ETF (TMID) is an ETF from T.Rowe Price. Year to date, AEMC is down 1.35% versus a gain of 0.46% for TMID.
Past performance does not guarantee future results.
Fees and Cost Over Time
AEMC charges 0.35% per year while TMID charges 0.47%. On a $10,000 position that is $35 vs $47 annually, a gap of $12 per year that compounds over a long holding period. On income, AEMC currently yields 0.00% against 0.00% for TMID.
Holdings Overlap
47.9% of AEMC's money is in holdings TMID also owns. 13.8% of TMID's money is in holdings AEMC also owns.
The two portfolios partly overlap.
38 positions in common, counted across the 111 positions we hold weights for in AEMC and 391 in TMID, against full books of 198 and 391.
What only one of them owns
Our book lists 330 positions for TMID that do not appear in our book for AEMC (81.2% of the fund), and 71 for AEMC that do not appear in TMID (51.2%).
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 AEMC | Weight in TMID | Difference |
|---|---|---|---|
| MPCMarathon Petroleum Corp | 4.08% | 0.64% | 3.44% |
| FIXComfort Systems USA Inc. | 3.13% | 0.37% | 2.76% |
| AMPAmeriprise Financial Inc | 2.91% | 0.33% | 2.58% |
| IEXIdex Corp Common Stock Usd 0.01 | 2.79% | 0.26% | 2.53% |
| STTState Street Corp. | 2.58% | 0.40% | 2.18% |
| AMEAmetek Inc | 2.17% | 0.59% | 1.58% |
| SNASnap-On Inc. | 2.52% | 0.23% | 2.29% |
| PSXPhillips 66 | 1.61% | 1.14% | 0.47% |
| MANHManhattan Associates Inc | 1.82% | 0.37% | 1.45% |
| 0RMV:LNTechnipfmc Plc Ordinary Shares | 1.32% | 0.86% | 0.46% |
47.9% of AEMC is already inside TMID.
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, AEMC or TMID?
AEMC has an expense ratio of 0.35% while TMID charges 0.47%. AEMC is the cheaper option, by $12 a year on a $10,000 investment.
What is the holdings overlap between AEMC and TMID?
47.9% of AEMC's money is in holdings TMID also owns. 13.8% of TMID's is in holdings AEMC also owns. They hold 38 positions in common, counted across the 111 positions we hold weights for in AEMC and 391 in TMID.
Which pays a higher dividend, AEMC or TMID?
AEMC yields 0.00% while TMID yields 0.00%, so TMID currently pays the higher dividend yield.
Is TMID better than AEMC?
AEMC has a lower expense ratio. TMID is less concentrated, with 9.6% of the fund in its ten largest positions against 27.0%. Which one suits a particular account depends on what it is for. This is information, not a recommendation.