Data as of .
ARTY vs IDEF: which is really different?
ARTY and IDEF hold 3% of their weight in the same names, and ARTY returned more over the year.
ETFIQ Off-Index Score: IDEF scores higher
How much of it is not the index it is sold as an alternative to?
A percentile among the 349 thematic ETFs with a holdings filing. It is a position in a set, not a rating, and neither end of it is a recommendation. All thematic ETFs ranked by it · How it is computed
3% of the two portfolios are the same securities at the same weight.
What they hold in common
By the books each fund has filed, ARTY and IDEF hold 3% of their money in the same securities at the same weight.
| Holding | ARTY | IDEF |
|---|---|---|
| PALANTIR TECHNOLOGIES CLASS A | 3.14% | 4.71% |
| CASH COLLATERAL USD HBCFT | 0.02% | 0.29% |
| USD CASH | 0.02% | 2.72% |
| AUD CASH | 0.02% | 0.01% |
| CAD CASH | 0.01% | 0.01% |
| EUR CASH | 0.01% | 0.15% |
| Only in ARTY | Only in IDEF |
|---|---|
| NVIDIA 4.82% | RTX 6.72% |
| TAIWAN SEMICONDUCTOR MANUFACTURING 4.81% | LOCKHEED MARTIN CORP 3.62% |
| MICRON TECHNOLOGY 4.61% | BOEING 3.32% |
| ADVANCED MICRO DEVICES 4.59% | ROLLS-ROYCE HOLDINGS PLC 3.30% |
| SUPER MICRO COMPUTER INC 4.11% | GENERAL DYNAMICS CORP 2.97% |
| BROADCOM INC 4.10% | THALES SA 2.61% |
| GLOBAL UNICHIP 4.04% | NORTHROP GRUMMAN CORP 2.56% |
| COREWEAVE CLASS A 3.87% | SPACE EXPLORATION TECHNOLOGIES COR 2.38% |
Weight overlap is an ETFIQ calculation: for every security both funds hold, the smaller of the two weights, summed. Above 50%, holding both is close to holding one of them twice. Holdings dated Sep 10, 2026.
Performance, window by window
| Window | Total return | vs the S&P 500 | vs the Nasdaq-100 | |||
|---|---|---|---|---|---|---|
| ARTY | IDEF | ARTY | IDEF | ARTY | IDEF | |
| 3 months | +3.1% | −1.9% | −0.2 pts | −5.2 pts | +3.9 pts | −1.1 pts |
| 6 months | +56.0% | −8.5% | +40.0 pts | −24.5 pts | +35.3 pts | −29.2 pts |
| 1 year | +69.6% | +4.9% | +52.1 pts | −12.6 pts | +46.7 pts | −18.1 pts |
| 3 years | +143.8% | not published | +65.9 pts | not published | +48.7 pts | not published |
| Since launch | +240.1% | +26.5% | +21.2 pts | −6.4 pts | −99.9 pts | −13.6 pts |
| ARTY iShares Future AI & Tech ETF Holds 56 stocks in artificial intelligence, 50% of its weight in S&P 500 companies | IDEF iShares Defense Industrials Active ETF Holds 152 stocks in defense, 36% of its weight in S&P 500 companies | |
|---|---|---|
| Issuer | iShares | iShares |
| Theme | Artificial intelligence | Defense |
| In the S&P 500 | 50.5% | 36.1% |
| Active share vs the S&P 500 | 82.9% | 95.9% |
| In the Nasdaq-100 | 35.7% | 8.5% |
| Holdings | 56 | 152 |
| Top ten, share of the fund | 42.1% | 35.2% |
| Expense ratio | 0.47% | not published |
| Fee for the differing part | 0.57% | not published |
| Total return, 1 year | +69.6% | +4.9% |
| vs the S&P 500 | +52.1 pts | −12.6 pts |
| vs the Nasdaq-100 | +46.7 pts | −18.1 pts |
| Below its high | −6.5% | −13.9% |
ARTY in plain words
By weight, 50% of ARTY's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 83%. The top ten holdings are 42% of the fund across 56 positions, as published by its issuer for Sep 10, 2026. Over the year to Sep 11, 2026 the fund returned +69.6% with distributions reinvested against +17.5% for the S&P 500, so a holder was ahead by 52.1 pts. It sits 6.5% below its all-time high of Jun 2, 2026.
IDEF in plain words
By weight, 36% of IDEF's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 96%. The top ten holdings are 35% of the fund across 152 positions, as published by its issuer for Sep 10, 2026. Over the year to Sep 11, 2026 the fund returned +4.9% with distributions reinvested against +17.5% for the S&P 500, so a holder was behind by 12.6 pts. It sits 13.9% below its all-time high of Mar 2, 2026.
Questions people ask
- Do ARTY and IDEF hold the same stocks?
- By their latest filings, 3% of their books are the same securities at the same weight, which is mostly different names. Overlap is the sum of the smaller weight of every security they share.
- Which is more different from the S&P 500, ARTY or IDEF?
- ARTY has 50% of its weight in S&P 500 names and IDEF has 36%, so IDEF differs more from the index.
Other comparisons
Where these figures came from
ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement.
Cite this page. ETFIQ, ARTY against IDEF, data as of Sep 11, 2026. https://etfiq.com/compare/themes/ARTY-IDEF Free to use with attribution; the underlying files are at Open data.