ARKX · ARK Space & Defense Innovation ETF
ARKX holds 34 stocks. 88% of it is not in the S&P 500, and its top ten are 62% of the fund.
Its ten largest positions
| Holding | Ticker | Weight | |
|---|---|---|---|
| ROCKET LAB | RKLB UQ | 8.90% | |
| L3HARRIS TECHNOLOGIES INC | LHX | 8.34% | |
| KRATOS DEFENSE & SECURITY | KTOS | 7.75% | |
| TERADYNE INC | TER | 7.22% | |
| AEROVIRONMENT INC | AVAV | 6.58% | |
| DEERE & CO | DE | 5.28% | |
| ARCHER AVIATION INC-A | ACHR | 5.08% | |
| PALANTIR TECHNOLOGIES INC-A | PLTR | 4.34% | |
| ADVANCED MICRO DEVICES | AMD | 4.16% | |
| TRIMBLE INC | TRMB | 4.13% |
Period by period
| Window | Total return | S&P 500 | Gap to S&P 500 | Gap to Nasdaq-100 |
|---|---|---|---|---|
| 3 months | −5.3% | +4.7% | −10.0 pts | −7.4 pts |
| 6 months | +3.1% | +15.2% | −12.1 pts | −17.1 pts |
| 1 year | +26.0% | +20.0% | +6.0 pts | +0.4 pts |
| 3 years | +123.0% | +78.0% | +45.0 pts | +29.5 pts |
| Since launch | +58.7% | +109.5% | −50.8 pts | −77.2 pts |
In plain words
The top ten holdings are 62% of the fund across 34 positions, as filed for Jan 2, 2026. Over the year to Sep 4, 2026 the fund returned +26.0% with distributions reinvested against +20.0% for the S&P 500, so a holder was ahead by 6.0 pts. It sits 14.6% below its all-time high of May 28, 2026.
| Theme (ETFIQ, editorial) | Space |
|---|---|
| Launched | Mar 30, 2021 |
| Already in the S&P 500, by weight (ETFIQ) | 48.8% |
| Active share vs the S&P 500 (ETFIQ) | 88.5% |
| Already in the Nasdaq-100, by weight (ETFIQ) | 20.6% |
| Active share vs the Nasdaq-100 (ETFIQ) | 84.7% |
| Top ten holdings weight | 61.8% |
| Holdings | 34 |
| Holdings as of (SEC N-PORT) | Jan 2, 2026 |
| Top holdings | ROCKET LAB 8.9%, L3HARRIS TECHNOLOGIES INC 8.3%, KRATOS DEFENSE & SECURITY 7.8%, TERADYNE INC 7.2%, AEROVIRONMENT INC 6.6%, DEERE & CO 5.3%, ARCHER AVIATION INC-A 5.1%, PALANTIR TECHNOLOGIES INC-A 4.3%, ADVANCED MICRO DEVICES 4.2%, TRIMBLE INC 4.1% |
| Net assets (SEC filing, whole fund, as filed for Jan 2, 2026) | $893m |
| Below its all-time high (ETFIQ) | −14.6% |
| Expense ratio (prospectus XBRL) | 0.75% |
| Fee for the part that differs from the S&P 500, active expense ratio (ETFIQ) | 0.85% |
| Closest funds by holdings overlap | ARKQ 54%, FBOT 28%, UFO 23%, JEDI 23%, AGIQ 23% |
Holdings from the fund’s latest public SEC N-PORT filing; overlap and active share computed by ETFIQ against the IVV and QQQM books; returns from Tiingo end-of-day prices with distributions reinvested. How this desk computes every figure
Questions people ask
- How much of ARKX is already in the S&P 500?
- By its holdings filed for Jan 2, 2026, 49% of ARKX by weight is stocks the S&P 500 already holds. Its active share against the index is 88%, so that share is the part doing something different.
- What does ARKX hold?
- 34 positions as filed for Jan 2, 2026, with the top ten at 62% of the fund. The largest are ROCKET LAB at 8.9%, L3HARRIS TECHNOLOGIES INC at 8.3%, KRATOS DEFENSE & SECURITY at 7.8%.
- Has ARKX beaten the S&P 500?
- Over the year to Sep 4, 2026 ARKX returned +26.0% with distributions reinvested, against +20.0% for the S&P 500, so it finished ahead of the index by 6.0 points.
- What does ARKX cost?
- The prospectus expense ratio is 0.75% a year. Because 88% of the fund differs from the S&P 500, the fee on that differing part works out at 0.85%.
The words on this page
- Active share
- The part of the fund doing something the index is not, as a percentage. It is the part a fee is actually buying.
- Weight overlap
- The share of money two portfolios hold in the same securities at the same weight. Above 50%, holding both is close to holding one of them twice.
- Already in the index
- The fund’s weight in securities the S&P 500 holds at all. A fund can be made entirely of index names and still have high active share, because it holds them at very different weights.
- Top ten
- What the ten largest positions add up to. The higher it is, the more the fund is a bet on a few companies rather than a theme.
Every term this desk uses, defined in full on the themes desk vocabulary page.
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.
Funds near this one
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Cite this page. ETFIQ, ARKX on the themes desk, data as of Sep 4, 2026. https://etfiq.com/funds/ARKX.html Free to use with attribution; the underlying files are at Open data.