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ARKX vs UFO: which is really different?

ARKX and UFO hold 21% of their weight in the same names, and UFO returned +19.0% over the year. ARK Space & Defense Innovation ETF and Procure Space ETF.

51.4%
ARKX in the S&P 500
35.9%
UFO in the S&P 500
+11.7%
ARKX total return, 1 year
+19.0%
UFO total return, 1 year
ARKX · 1 year to Sep 30, 202649% of its weight is outside the S&P 500
49% of its weight is outside the S&P 50051% of ARKX's weight is in S&P 500 companies and 49% is outside the index51%49%of its weight in S&P 500 companiesof its weight outside the S&P 500active share 84% · top ten 57% of the fund · 34 holdings filed Oct 1, 2026 · Nasdaq-100: 28% in49% of its weight is outside the S&P 50051% of ARKX's weight is in S&P 500 companies and 49% is outside the index51%49%in the S&P 500outsideactive share 84% · top ten 57% of the fund

51% of ARKX's weight is in S&P 500 companies and 49% is outside the index

UFO · 1 year to Sep 30, 202664% of its weight is outside the S&P 500
64% of its weight is outside the S&P 50036% of UFO's weight is in S&P 500 companies and 64% is outside the index36%64%of its weight in S&P 500 companiesof its weight outside the S&P 500active share 99% · top ten 49% of the fund · 64 holdings filed Jul 31, 2026 · Nasdaq-100: 1% in64% of its weight is outside the S&P 50036% of UFO's weight is in S&P 500 companies and 64% is outside the index36%64%inoutside the S&P 500active share 99% · top ten 49% of the fund

36% of UFO's weight is in S&P 500 companies and 64% is outside the index

ETFIQ Off-Index Score · UFO scores higherHow much of it is not the index it is sold as an alternative to?
0.1, the lowest in this set92.0, the highest

A percentile among the 375 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 →

What they hold in common

By the books each fund has filed, ARKX and UFO hold 21% of their money in the same securities at the same weight. Above 50%, holding both is close to holding one of them twice. Holdings dated Apr 30, 2026 and Oct 1, 2026.

half

21% in common

Positions both hold, largest shared weight first
Holding ARKX UFO
TRIMBLE INC 3.24% 4.27%
INTUITIVE MACHINES INC 1.91% 3.48%
L3HARRIS TECHNOLOGIES INC 6.17% 1.88%
GARMIN LTD 1.52% 4.46%
AIRBUS SE 0.90% 2.17%
LOCKHEED MARTIN CORP 0.86% 1.66%
IRIDIUM COMMUNICATIONS INC 0.47% 4.53%
THALES SA 1.83% 0.28%
Only in ARKX
SPACE EXPLORATION TECHN-CL A 10.84%
ROCKET LAB 5.86%
DEERE & CO 5.60%
KRATOS DEFENSE & SECURITY 5.49%
NVIDIA CORP 5.37%
AEROVIRONMENT INC 4.61%
ADVANCED MICRO DEVICES 4.52%
AMAZON.COM INC 4.48%
Only in UFO
Planet Labs PBC 6.21%
Viasat Inc 5.94%
Globalstar Inc 5.32%
Sirius XM Holdings Inc 5.08%
Rocket Lab Corp 5.06%
EchoStar Corp 4.79%
MDA Space Ltd 4.13%
SES SA 4.03%

Weight overlap is an ETFIQ calculation: for every security both funds hold, the smaller of the two weights, summed.

21% of the two portfolios are the same securities at the same weight.

Performance, window by window

Total returnvs the S&P 500vs the Nasdaq-100
WindowARKXUFOARKXUFOARKXUFO
3 months−5.7%−15.7%−8.2 pts−18.2 pts−7.8 pts−17.8 pts
6 months+6.7%−8.4%−10.3 pts−25.4 pts−20.2 pts−35.3 pts
1 year+11.7%+19.0%−4.0 pts+3.3 pts−12.1 pts−4.8 pts
3 years+131.5%+160.4%+46.5 pts+75.5 pts+21.5 pts+50.5 pts
Since launch
ARKX Mar 2021 · UFO Apr 2019
+57.1%+86.5%−50.8 pts−108.9 pts−85.9 pts−232.4 pts

ARKX and UFO over each window. Every figure is an ETFIQ calculation with distributions reinvested. Source: ETFIQ. Open the live comparison on ETFIQ →

On the same fields

ARKX
ARK Space & Defense Innovation ETF · Holds 34 stocks in space, 51% of its weight in S&P 500 companies
UFO
Procure Space ETF · Holds 64 stocks in space, 36% of its weight in S&P 500 companies
Issuer ARK Procure
Theme Space Space
In the S&P 500 51.4% 35.9%
Active share vs the S&P 500 83.6% 98.6%
In the Nasdaq-100 28.4% 1.1%
Holdings 34 64
Top ten, share of the fund 57.1% 48.5%
Expense ratio 0.75% 0.75%
Fee for the differing part 0.90% 0.76%
Total return, 1 year +11.7% +19.0%
vs the S&P 500 −4.0 pts +3.3 pts
vs the Nasdaq-100 −12.1 pts −4.8 pts
Below its high −15.5% −37.5%
Net assets $737m $587m

ARKX and UFO on the same fields, as of Sep 30, 2026. Source: ETFIQ.

ARKX in plain words

By weight, 51% of ARKX's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 84%. The top ten holdings are 57% of the fund across 34 positions, as published by its issuer for Oct 1, 2026. Over the year to Sep 30, 2026 the fund returned +11.7% with distributions reinvested against +15.7% for the S&P 500, so a holder was behind by 4.0 pts. It sits 15.5% below its all-time high of May 28, 2026.

UFO in plain words

By weight, 36% of UFO's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 99%. The top ten holdings are 48% of the fund across 64 positions, as filed for Apr 30, 2026. Over the year to Sep 30, 2026 the fund returned +19.0% with distributions reinvested against +15.7% for the S&P 500, so a holder was ahead by 3.3 pts. It sits 37.5% below its all-time high of May 28, 2026.

Questions people ask

Do ARKX and UFO hold the same stocks?
By their latest filings, 21% of their books are the same securities at the same weight, which is a meaningful overlap. Overlap is the sum of the smaller weight of every security they share.
Which is more different from the S&P 500, ARKX or UFO?
ARKX has 51% of its weight in S&P 500 names and UFO has 36%, so UFO differs more from the index.
Which is cheaper, ARKX or UFO?
ARKX charges 0.75% a year and UFO charges 0.75%, so ARKX is cheaper. Fees come from each fund's prospectus.
Other comparisons
ARKX vs ORBXARKX vs FSPCARKX vs GALXARKX vs MARSUFO vs WARPUFO vs DIPRUFO vs FSPCUFO vs GALX
ARKX on its own →UFO on its own →How every figure is computed →Standards and sources →
Where these figures came from
ARKX filings on SEC EDGAR ↗ARKX prospectus with the expense ratio (SEC) ↗ARK page for ARKX ↗UFO filings on SEC EDGAR ↗UFO prospectus with the expense ratio (SEC) ↗Procure website ↗

ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement. A comparison is not a recommendation.

Cite this page

ETFIQ, ARKX against UFO, data as of Sep 30, 2026. https://etfiq.com/compare/themes/arkx-vs-ufo

Open data

Free to use with attribution. Every figure is calculated from a named public source; the method is at etfiq.com/methodology.