FMAG vs OAIW
Fidelity Magellan ETF vs OpenAI Lab Ecosystem ETF
Which is better, FMAG or OAIW?
FMAG costs less.
FMAG has a lower expense ratio. FMAG is less concentrated, with 44.0% of the fund in its ten largest positions against 62.4%.
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 | FMAG | OAIW |
|---|---|---|
| Expense Ratio | 0.57%Best | 0.59% |
| AUM | $228M | $5M |
| Dividend Yield | 0.00% | 0.00% |
| Holdings | 52 | 52 |
| YTD Return | +1.28%Best | -18.29% |
| 1Y Return | -0.20% | - |
| 3Y Return (annualized) | +15.51% | - |
| 5Y Return (annualized) | +7.03% | - |
| Top 10 Weight | 44.0%Best | 62.4% |
| Fund Family | Fidelity Investments (US) | Harbor Funds |
| Category | Equity | Equity |
| Style | Large Cap Growth | Large Cap Growth |
| Inception | Feb 2, 2021 | Aug 12, 2026 |
Not shown on this pair: Volatility (annualized), Max Drawdown, $10,000 over the window.
FMAG vs OAIW 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.
FMAG vs OAIW Performance
Fidelity Magellan ETF (FMAG) is an ETF from Fidelity Investments (US) and OpenAI Lab Ecosystem ETF (OAIW) is an ETF from Harbor Funds. Year to date, FMAG is up 1.28% versus a loss of 18.29% for OAIW.
Past performance does not guarantee future results.
Fees and Cost Over Time
FMAG charges 0.57% per year while OAIW charges 0.59%. On a $10,000 position that is $57 vs $59 annually, a gap of $2 per year that compounds over a long holding period. On income, FMAG currently yields 0.00% against 0.00% for OAIW.
Holdings Overlap
33.4% of FMAG's money is in holdings OAIW also owns. 35.5% of OAIW's money is in holdings FMAG also owns.
The two portfolios partly overlap.
The two holdings books were reported 61 days apart, FMAG as of Aug 31, 2026 and OAIW as of Oct 31, 2026, so some of the difference between them is the time between the two reports rather than the funds.
7 positions in common, counted across the 50 positions we hold weights for in FMAG and 25 in OAIW, against full books of 52 and 52.
What only one of them owns
Our book lists 13 positions for OAIW that do not appear in our book for FMAG (42.6% of the fund), and 43 for FMAG that do not appear in OAIW (66.0%).
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 FMAG | Weight in OAIW | Difference |
|---|---|---|---|
| NVDANvidia Corp | 10.24% | 5.43% | 4.81% |
| MSFTMicrosoft Corp | 5.61% | 9.29% | 3.68% |
| AMZNAmazon.Com Inc | 6.45% | 6.53% | 0.08% |
| AVGOBroadcom Inc | 4.55% | 4.89% | 0.34% |
| 2330:TWTaiwan Semiconductor Manufacturing Co Ltd | 2.01% | 4.51% | 2.50% |
| AMDAdvanced Micro Devices Inc | 3.14% | 2.95% | 0.19% |
| ANETArista Networks Inc Common Stock | 1.39% | 1.95% | 0.56% |
35.5% of OAIW is already inside FMAG.
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, FMAG or OAIW?
FMAG has an expense ratio of 0.57% while OAIW charges 0.59%. FMAG is the cheaper option, by $2 a year on a $10,000 investment.
What is the holdings overlap between FMAG and OAIW?
35.5% of OAIW's money is in holdings FMAG also owns. 35.5% of OAIW's is in holdings FMAG also owns. They hold 7 positions in common, counted across the 50 positions we hold weights for in FMAG and 25 in OAIW.
Which pays a higher dividend, FMAG or OAIW?
FMAG yields 0.00% while OAIW yields 0.00%, so FMAG currently pays the higher dividend yield.
Is OAIW better than FMAG?
FMAG has a lower expense ratio. FMAG is less concentrated, with 44.0% of the fund in its ten largest positions against 62.4%. Which one suits a particular account depends on what it is for. This is information, not a recommendation.