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MARS vs ROKT

Roundhill Space & Technology ETF

MARSDCboe

State Street SPDR S&P Kensho Final Frontiers ETF

ROKTANYSE Arca

Overlap

18.3%by weight

Expense ratio

ROKT −0.30pt a year

MARS0.75%ROKT0.45%

Avg volume · 30D

MARS 3.5×the volume

MARS73.7KROKT21.1K

MARS vs ROKT Performance

Jul 31, 2026 – Oct 30, 2026

−4.9%MARS−6.2%ROKT

Jul 31, 2026 to Oct 30, 2026. MARS −4.9%. ROKT −6.2%. Use the arrow keys to read each point.0%10%20%Jul 2026Sep 2026Oct 2026
Expense ratio
MARS 0.75%
ROKT 0.45%, better
Fund size
MARS $40M
ROKT $156M
1Y total return
MARS No data
ROKT +27.9%
Yield (12M)
MARS No data
ROKT 0.20%
Holdings
MARS 29
ROKT 38
Avg volume (30D)
MARS 73.7K sh, better
ROKT 21.1K sh
NAV per share
MARS $22.35
ROKT $106.01
52W range

ETF.net Grade

MARS: Cost 29, Risk 43, Mission not scored, Tradability 47, Holdings 39, Durability 65. ROKT: Cost 86, Risk 74, Mission 44, Tradability 74, Holdings 84, Durability 87.
Pillar letters and Scores for MARS, ROKT, with each pillar’s weight
PillarMARSROKT
Cost30% weightD29A86Higher
Mission25% weightNot scoredC44
Risk15% weightC43A74Higher
Tradability15% weightC47A74Higher
Holdings10% weightD39A84Higher
Durability5% weightB65A87Higher

Rank among Space funds

How we build Categories ›
Same Category. Both funds are graded against the same funds, so their Grades compare head to head.

Same Category. MARS and ROKT are both graded against the same 15 Space funds, so their Grades compare head to head.

Space⁠

Category · 15 funds
See all 15 ›

ROKT ranks 2nd and MARS 12th of 15 funds in the Space Category.

  1. Rank 1AUFOXDefiance Space and Connective Tech ETFScore 84
  2. Rank 2AROKTState Street SPDR S&P Kensho Final Frontiers ETFScore 80
  3. Rank 3CARKXARK Space & Defense Innovation ETFScore 54
  4. Rank 8CWSPCWisdomTree Space Economy FundScore 40
  5. Rank 12DMARSRoundhill Space & Technology ETFScore 38
  6. Rank 12DXSPCVegaShares SpaceX & Beyond Earth ETFScore 38

Our read on each fund

ETF.net Research

MARSDRoundhill Space & Technology ETF

ROKTAState Street SPDR S&P Kensho Final Frontiers ETF

In short

MARS No data

ROKT Most space funds stop at the atmosphere. ROKT plays both frontiers: rockets and satellites plus the hardware that explores the deep sea, wrapped in an AI-informed S&P Kensho index running since 2018.

Stated mandate

MARS No data

ROKT The fund seeks to track the S&P Kensho Final Frontiers Index, targeting companies whose products and services support innovation in outer-space and deep-sea exploration through an AI-informed, quantitative index methodology.

Why people hold it

MARS No data

  • ROKT 0.45% a year, the cheapest sticker in this cohort: ORBX runs 0.50%, while UFO, ARKX and NASA each charge 0.75%.
  • The index bolts the S&P Kensho Space Index onto the deep-sea exploration names from the Kensho Drones Index, so orbit and ocean floor arrive in one ticker.ssga.com
  • Trading since 2018 under the SPDR roof, and one of the strongest implementations in the space-theme group on cost, portfolio and staying power.
  • Roughly 40 stocks, refreshed on the index's annual reconstitution, with cash paid quarterly.ssga.com

Worth knowing

MARS No data

  • ROKT Trades lightly next to mainstream ETFs and carries a modest asset base; wider bid-ask spreads are the usual trade-off at that size.
  • Two frontiers in roughly 40 names is a concentrated slice of the market that can move very differently from a broad index.
  • The deep-sea sleeve means this is not a pure space bet: part of the portfolio never leaves the water.ssga.com

Full MARS profile⁠

Full ROKT profile⁠

MARS vs ROKT Holdings

How MARS and ROKT differ

Overlap by weight

18.3%

Shared holdings make up 31.5% of MARS and 20.1% of ROKT.

Level by level

  • Holdings9 in both18.3%
  • Countryby domicile75.4%
  • Asset classEquity100%

Sector

No Sector split for MARS.

Country, concentration and asset class

Country by domicile

Country weights in MARS and ROKT, widest gap first
CountryMore in MARSMore in ROKT
United StatesROKT +22.2 points
JapanMARS +7.6 points
CanadaMARS +5.8 points
GermanyMARS +4.8 points
FranceMARS +3.0 points
IsraelROKT +2.4 points
ItalyMARS +2.4 points
South KoreaMARS +1.0 points

Concentration

Weight in the 10 largest Holdings

  • MARS68.6%
  • ROKT38.0%

Securities held

  • MARS29
  • ROKT37

Asset class

MARS
Equity
ROKT
Equity

Holdings

  • Only in MARS20
  • In both9
  • Only in ROKT28

Only in MARS

20 securities, 68.5% of MARS by weight

  • Space Exploration Technologies Corp24.68%
  • Globalstar Inc5.70%
  • AST SpaceMobile Inc5.53%

Only in ROKT

28 securities, 79.9% of ROKT by weight

  • Forum Energy Technologies In4.82%
  • Lockheed Martin Corp4.23%
  • Teledyne Technologies Inc3.87%

Weight gaps

All 9 Holdings in both funds, largest gap first.

Holding weights in MARS and ROKT, widest gap first
HoldingMore in MARSMore in ROKT
Rocket Lab CorpRKLBMARS +7.02 points
Viasat IncVSATMARS +2.74 points
Planet Labs PBCPLMARS +1.78 points
Spire Global IncSPIRROKT +1.16 points
Intuitive Machines IncLUNRMARS +0.75 points
Firefly Aerospace IncFLYMARS +0.70 points
Voyager Technologies IncVOYGROKT +0.51 points
Iridium Communications IncIRDMMARS +0.20 points

All MARS holdings⁠All 37 ROKT holdings⁠

How we measure overlap

Each holding counts at its smaller weight in the two funds, summed over the full Holdings. Sector, country and asset class use the same rule on each fund’s split. Cash, FX and derivative lines stay out of the counts. Two bond funds get no overlap figure.

MARS vs ROKT Cost

Overpaying MARS vs ROKT

$5,441

On $10,000 over 30 years. 7% growth a year before fees, expense ratio only.

  • MARS 0.75%

    $14,482

  • ROKT 0.45%

    $9,041

$10,000
30 years

Cost over time

  • MARS 0.75%
  • ROKT 0.45%
  • Overpaying
One line per fund, from year 0 to year 30. Use the arrow keys to read each point.$0$5K$10K$15K051015202530MARS $14,482ROKT $9,041

Year by year

YearMARSROKTOverpaying
10$1,336$812$524
20$5,078$3,128$1,950
30$14,482$9,041$5,441

Expense ratio

  • 0.75%MARS
  • 0.45%ROKT, cheaper
  • Middle half of Space funds
  • Median 0.75%

ROKT 3rd cheapest of 15 funds

MARS 8th cheapest of 15 funds

MARS vs ROKT Dividends

Last 12 months to Oct 30, 2026
Yield (12M)
MARS No data
ROKT 0.20%
Payout (12M)
MARS None
ROKT $0.21
Last payment
MARS No data
ROKT $0.05
Ex-dividend
MARS No data
ROKT Sep 21, 2026
Paid on
MARS No data
ROKT Sep 23, 2026
Frequency
MARS No data
ROKT Quarterly

Distribution history

Per share, 2018 to 2026, same scale for both

MARSAll MARS payments⁠

No distribution history available.

ROKTQuarterly · 32 paymentsAll ROKT payments⁠
One bar per payment. 32 payments from 2018 to 2026 YTD. Dec 24, 2018 $0.04; Mar 18, 2019 $0.07; Jun 24, 2019 $0.06; Sep 23, 2019 $0.08; Dec 23, 2019 $0.05; Mar 23, 2020 $0.05; Jun 22, 2020 $0.03; Sep 21, 2020 $0.04; Dec 21, 2020 $0.06; Mar 22, 2021 $0.59; Jun 21, 2021 $0.04; Sep 20, 2021 $0.04; Dec 20, 2021 $0.05; Mar 21, 2022 $0.05; Jun 21, 2022 $0.05; Sep 19, 2022 $0.07; Dec 19, 2022 $0.04; Mar 20, 2023 $0.05; Jun 20, 2023 $0.05; Sep 18, 2023 $0.06; Dec 18, 2023 $0.11; Mar 18, 2024 $0.06; Jun 24, 2024 $0.07; Sep 23, 2024 $0.06; Dec 23, 2024 $0.14; Mar 24, 2025 $0.08; Jun 23, 2025 $0.07; Sep 22, 2025 $0.15; Dec 22, 2025 $0.05; Mar 23, 2026 $0.06; Jun 22, 2026 $0.05; Sep 21, 2026 $0.05. Use the arrow keys to read each point.$0$0.50202020232026YTD

MARS vs ROKT Risk

Fall from peak · 5 years

This chart needs five years of history for both funds.

Risk facts

VolatilityStd dev, 3 years
MARS No dataROKT 26.4%
Return per unit of riskSharpe ratio, 3 years
MARS No dataROKT 1.23
Worst fallMax drawdown, 5 years
MARS No dataROKT −27.6%
Market sensitivityBeta, 5 years
MARS 4.86ROKT 1.43

MARS and ROKT in the news

All news⁠

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