D1 Capital's 13F Reveals 62% of the Book Is SpaceX
As seen on the 24/7 Wall St. homepage on August 14, 2026.
- SPACE EXPLORATION TECHN CORP61.9%
- CARTMAPLEBEAR INC3.1%
- JAMES HARDIE INDS PLC2.1%
- NUNU HLDGS LTD1.7%
- JCIJOHNSON CONTROLS INTERNATION1.6%
As of Jun 30, 2026 · disclosed Aug 14, 2026 · ~45 days stale — long positions only.
Nearly 62% of Dan Sundheim's disclosed book at D1 Capital sits in a single private company, SpaceX, as of June 30. The other 54 positions barely register, with the next largest under 4%. Anyone tracking D1 for public-market ideas is really tracking one unlisted rocket bet.
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Daniel Sundheim's D1 Capital Partners disclosed its portfolio as of June 30, 2026, and SpaceX accounts for 61.9% of the fund's entire reported book. Everything else runs a distant second.
SpaceX carries no ticker, so it shows up in a 13F only because D1 holds it in a form the SEC requires to be reported. That means investors who comb through hedge fund filings looking for actionable public-market ideas will find very little here to trade directly, since the dominant holding cannot be bought on any exchange.
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The next largest position is Maplebear (Instacart), followed by James Hardie Industries, Nu Holdings, and Johnson Controls, with those five names making up 70.3% of the disclosed book.
D1 Capital is a Tiger Cub fund, tracing its lineage to Julian Robertson's Tiger Management, and a single private holding of this magnitude is unusual even for a group watched for concentrated public equity bets. Sundheim's disclosed book is, in practical terms, a leveraged view on SpaceX's private valuation.