{"url":"https://etfiq.com/compare/themes/mars-vs-ufo","section":"compare","title":"MARS vs UFO: which is really different? | ETFIQ","description":"0.0% of MARS and 35.9% of UFO is already in the S&P 500 by weight, as filed, and 46% of the two books are the same names at the same weight.","as_of":"Sep 30, 2026","structured_data":[{"@type":"FAQPage","mainEntity":[{"@type":"Question","name":"Do MARS and UFO hold the same stocks?","acceptedAnswer":{"@type":"Answer","text":"By their latest filings, 46% 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."}},{"@type":"Question","name":"Which is more different from the S&P 500, MARS or UFO?","acceptedAnswer":{"@type":"Answer","text":"MARS has 0% of its weight in S&P 500 names and UFO has 36%, so MARS differs more from the index."}},{"@type":"Question","name":"Which is cheaper, MARS or UFO?","acceptedAnswer":{"@type":"Answer","text":"MARS charges 0.75% a year and UFO charges 0.75%, so MARS is cheaper. Fees come from each fund's prospectus."}}]},{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"ETFIQ","item":"https://etfiq.com/"},{"@type":"ListItem","position":2,"name":"Thematic ETFs","item":"https://etfiq.com/themes/"},{"@type":"ListItem","position":3,"name":"MARS vs UFO","item":"https://etfiq.com/compare/themes/mars-vs-ufo"}]},{"@type":"WebPage","name":"MARS vs UFO: which is really different?","description":"0.0% of MARS and 35.9% of UFO is already in the S&P 500 by weight, as filed, and 46% of the two books are the same names at the same weight. Returns and overlap to Sep 30, 2026.","url":"https://etfiq.com/compare/themes/mars-vs-ufo","dateModified":"2026-09-30","abstract":"MARS and UFO hold 46% of their weight in the same names.","publisher":{"@id":"https://etfiq.com/#org"},"isPartOf":{"@id":"https://etfiq.com/#website"},"speakable":{"@type":"SpeakableSpecification","cssSelector":[".verdict",".faq"]}},{"@type":"Dataset","name":"ETFIQ comparison of MARS and UFO","description":"0.0% of MARS and 35.9% of UFO is already in the S&P 500 by weight, as filed, and 46% of the two books are the same names at the same weight. Returns and overlap to Sep 30, 2026.","dateModified":"2026-09-30","creator":{"@id":"https://etfiq.com/#org"},"isAccessibleForFree":true,"url":"https://etfiq.com/compare/themes/mars-vs-ufo","license":"https://etfiq.com/standards/","publisher":{"@id":"https://etfiq.com/#org"},"inLanguage":"en","creativeWorkStatus":"Published","distribution":[{"@type":"DataDownload","encodingFormat":"application/json","contentUrl":"https://etfiq.com/data/thematic.json"}],"variableMeasured":["Weight overlap with the S&P 500","Active share","Holdings","Top ten share of the fund","Total return","Fee for the differing part","Expense ratio"],"keywords":["exchange-traded funds","ETF","Thematic ETFs","fund data","SEC filings"]}],"characters":6929,"truncated":true,"content":"ETFIQ / Thematic ETFs / Head to head / MARS vs UFO \n ETFIQ etfiq.com \u00b7 independent ETF data \n\n Data as of Sep 30, 2026 .\n\n MARS vs UFO: which is really different?\n\n MARS and UFO hold 46% of their weight in the same names.\n Copy this for sharing \n \n Roundhill Space & Technology ETF and Procure Space ETF.\n\n Download as PDF \n\n 0.0% MARS in the S&P 500 \n 35.9% UFO in the S&P 500 \n +1.4% MARS total return, since launch \n +19.0% UFO total return, 1 year \n\n ETFIQ Off-Index Score: MARS scores higher\n How much of it is not the index it is sold as an alternative to?\n [MARS scores 92 and UFO 56.7 on Off-","source":"ETFIQ, independent ETF data. Recomputed nightly from public filings and prices.","publisher":{"@id":"https://etfiq.com/#org","name":"ETFIQ","url":"https://etfiq.com"},"license":"https://etfiq.com/license/","citation":"ETFIQ, as of Sep 30, 2026. https://etfiq.com/compare/themes/mars-vs-ufo","a":{"ticker":"MARS","name":"Roundhill Space & Technology ETF","issuer":"Roundhill","desk":"themes","as_of":"2026-09-30","verdict":"MARS holds 29 stocks, and 100% of its weight is outside the S&P 500.","url":"https://etfiq.com/funds/mars","key_facts":[{"label":"Already in the S&P 500","value":"0.0%","as_of":"2026-09-30","source":null},{"label":"Active share vs the S&P 500","value":"100.0%","as_of":"2026-09-30","source":null},{"label":"Top ten holdings","value":"67.9%","as_of":"2026-09-30","source":null},{"label":"Total return, since launch","value":"+1.4%","as_of":"2026-09-30","source":null},{"label":"Net assets","value":"$46m","as_of":"2026-09-30","source":"the issuer\u2019s own daily fund list, as of Sep 30, 2026"},{"label":"Expense ratio","value":"0.75%","as_of":"2026-09-30","source":"485BPOS XBRL, Jan 8, 2026"}]},"b":{"ticker":"UFO","name":"Procure Space ETF","issuer":"Procure","desk":"themes","as_of":"2026-09-30","verdict":"UFO holds 64 stocks, and 64% of its weight is outside the S&P 500.","url":"https://etfiq.com/funds/ufo","key_facts":[{"label":"Already in the S&P 500","value":"35.9%","as_of":"2026-09-30","source":null},{"label":"Active share vs the S&P 500","value":"98.6%","as_of":"2026-09-30","source":null},{"label":"Top ten holdings","value":"48.5%","as_of":"2026-09-30","source":null},{"label":"Total return, 1 year","value":"+19.0%","as_of":"2026-09-30","source":null},{"label":"Net assets","value":"$587m","as_of":"2026-09-30","source":"SEC filing, whole fund, as filed for Jul 31, 2026"},{"label":"Expense ratio","value":"0.75%","as_of":"2026-09-30","source":"485BPOS XBRL, Feb 24, 2026"}]},"overlap_pct":46,"full_text_at":"https://etfiq.com/compare/themes/mars-vs-ufo"}