Do FSPC and MARS hold the same stocks?

By their latest filings, 30% 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, FSPC or MARS?

FSPC has 27% of its weight in S&P 500 names and MARS has 0%, so MARS differs more from the index.

Which is cheaper, FSPC or MARS?

FSPC charges 0.65% a year and MARS charges 0.75%, so FSPC is cheaper. Fees come from each fund's prospectus.

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FSPC vs MARS: which is really different?

FSPC and MARS hold 30% of their weight in the same names. First Trust Bloomberg Space Economy ETF and Roundhill Space & Technology ETF.

27.1%

FSPC in the S&P 500

0.0%

MARS in the S&P 500

−6.3%

FSPC total return, since launch

+1.4%

MARS total return, since launch

FSPC · since launch to Sep 30, 202673% of its weight is outside the S&P 500

27% of FSPC's weight is in S&P 500 companies and 73% is outside the index

MARS · 6 months to Sep 30, 2026100% of its weight is outside the S&P 500

0% of MARS's weight is in S&P 500 companies and 100% is outside the index

ETFIQ Off-Index Score · MARS scores higherHow much of it is not the index it is sold as an alternative to?

FSPC 58.7

MARS 92

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, FSPC and MARS hold 30% 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 Sep 30, 2026.

50%

half

30% in common

Positions both hold, largest shared weight first

Holding FSPC MARS

Space Exploration Technologies Corp. (Class A) 4.77% 24.39%

ViaSat, Inc. 4.34% 4.69%

Rocket Lab Corporation 3.55% 10.05%

AST SpaceMobile, Inc. 3.54% 7.02%

Planet Labs PBC (Class A) 2.48% 3.63%

Globalstar, Inc. 2.37% 5.07%

MDA Space Ltd. 2.22% 3.27%

Intuitive Machines, Inc. (Class A) 1.16% 2.67%

Redwire Corporation 1.10% 2.26%

Firefly Aerospace Inc. 0.89% 3.13%

Avio SpA 0.67% 1.93%

Iridium Communications Inc. 0.49% 3.45%

Only in FSPC

Mitsubishi Heavy Industries, Ltd. 5.33%

Palantir Technologies Inc. (Class A) 4.93%

Thales S.A. 4.77%

Safran S.A. 4.75%

Northrop Grumman Corporation 4.52%

EchoStar Corporation (Class A) 4.51%

L3Harris Technologies, Inc. 4.02%

Lockheed Martin Corporation 3.18%

Only in MARS

OHB SE 3.21%

SKY Perfect JSAT Corp 2.91%

Telesat Corp 2.21%

Eutelsat Communications SACA 2.13%

SES SA 2.04%

Synspective Inc 1.68%

York Space Systems Inc 1.57%

Satellogic Inc 1.34%

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

30% of the two portfolios are the same securities at the same weight.

Performance, window by window

	Total return		vs the S&P 500		vs the Nasdaq-100
Window	FSPC	MARS	FSPC	MARS	FSPC	MARS
3 months	not published	−19.7%	not published	−22.2 pts	not published	−21.8 pts
6 months	not published	−5.6%	not published	−22.6 pts	not published	−32.5 pts
Since launch FSPC Jul 2026 · MARS Mar 2026	−6.3%	+1.4%	−8.0 pts	−11.4 pts	−8.7 pts	−20.5 pts

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

On the same fields

FSPC

First Trust Bloomberg Space Economy ETF · Holds 53 stocks in space, 27% of its weight in S&P 500 companies

MARS

Roundhill Space & Technology ETF · Holds 29 stocks in space, 0% of its weight in S&P 500 companies

Issuer First Trust Roundhill

Theme Space Space

In the S&P 500 27.1% 0.0%

Active share vs the S&P 500 98.8% 100.0%

In the Nasdaq-100 8.1% 0.0%

Holdings 53 29

Top ten, share of the fund 45.5% 67.9%

Expense ratio 0.65% 0.75%

Fee for the differing part 0.66% 0.75%

Total return, 1 year −6.3% (since launch on Jul 9, 2026) +1.4% (since launch on Mar 5, 2026)

vs the S&P 500 −8.0 pts −11.4 pts

vs the Nasdaq-100 −8.7 pts −20.5 pts

Below its high −13.7% −44.9%

Net assets $2m $46m

FSPC and MARS on the same fields, as of Sep 30, 2026. Source: ETFIQ.

FSPC in plain words

By weight, 27% of FSPC'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 46% of the fund across 53 positions, as published by its issuer for Sep 30, 2026. Since it launched on Jul 9, 2026 the fund returned −6.3% with distributions reinvested against +1.7% for the S&P 500, so a holder was behind by 8.0 pts. It sits 13.7% below its all-time high of Aug 14, 2026.

MARS in plain words

By weight, 0% of MARS's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 100%. The top ten holdings are 68% of the fund across 29 positions, as published by its issuer for Sep 30, 2026. Since it launched on Mar 5, 2026 the fund returned +1.4% with distributions reinvested against +12.8% for the S&P 500, so a holder was behind by 11.4 pts. It sits 44.9% below its all-time high of May 28, 2026.

Questions people ask

Do FSPC and MARS hold the same stocks?: By their latest filings, 30% 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, FSPC or MARS?: FSPC has 27% of its weight in S&P 500 names and MARS has 0%, so MARS differs more from the index.
Which is cheaper, FSPC or MARS?: FSPC charges 0.65% a year and MARS charges 0.75%, so FSPC is cheaper. Fees come from each fund's prospectus.

Other comparisons

FSPC vs GALX FSPC vs UFO FSPC vs WARP FSPC vs NASA MARS vs NASA MARS vs ORBX MARS vs UFO MARS vs WARP

FSPC on its own →MARS on its own →How every figure is computed →Standards and sources →

Where these figures came from

FSPC filings on SEC EDGAR ↗FSPC prospectus with the expense ratio (SEC) ↗First Trust page for FSPC ↗MARS filings on SEC EDGAR ↗MARS prospectus with the expense ratio (SEC) ↗Roundhill page for MARS ↗

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, FSPC against MARS, data as of Sep 30, 2026. https://etfiq.com/compare/themes/fspc-vs-mars

Open data

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