Dan Sundheim runs D1 Capital Partners L.P., a concentrated book of 55 stocks worth $34.8B as of Q2 2026 (disclosed Aug 14, 2026, a ~45-day 13F lag). This quarter they opened Space Exploration Techn Corp and trimmed James Hardie Ind PLC. Their largest long position is Space Exploration Techn Corp at 62% of the equity book.
Top-heavy: concentrated book
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
38% mapped to company sectors
Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.
Estimated $ traded · quarter-end prices, no cost basis
55 companies · Q2 2026
| # | Stock | % of book | Value | Shares | Last move |
|---|---|---|---|---|---|
| 1 | Space Exploration Techn Corp | 61.9% | $21.5B | 126.0M | ▲New +126.0M sh |
| 2 | Maplebear IncCART | 3.1% | $1.1B | 22.6M | ▲~0% Added · +6K sh |
| 3 | James Hardie Ind PLCJHX | 2.1% | $721.1M | 27.5M | ▼−2.7% Reduced · −755K sh |
| 4 | Nu Holdings Ltd/cayman Isl-ANU | 1.7% | $593.4M | 44.4M | ▲+72% Added · +18.5M sh |
| 5 | Johnson Controls InternationJCI | 1.6% | $548.2M | 3.8M | ▲+207% Added · +2.5M sh |
| 6 | Mercadolibre IncMELI | 1.4% | $471.0M | 277K | ▼−26% Reduced · −96K sh |
| 7 | US Foods Holding CorpUSFD | 1.3% | $460.3M | 4.5M | ▲+5.1% Added · +218K sh |
| 8 | Danaher CorpDHR | 1.2% | $434.7M | 2.3M | ▼−0.9% Reduced · −22K sh |
| 9 | Sherwin-Williams CoSHW | 1.2% | $431.3M | 1.3M | ▲+164% Added · +779K sh |
| 10 | Reddit Inc-CL ARDDT | 1.2% | $427.8M | 2.5M | ▲+0.2% Added · +5K sh |
| 11 | Thermo Fisher Scientific IncTMO | 1.2% | $409.7M | 817K | ▲+13% Added · +92K sh |
| 12 | Kilroy Realty CorpKRC | 1.1% | $393.4M | 10.5M | ▼−6.9% Reduced · −777K sh |
| 13 | Clean Harbors IncCLH | 1.1% | $393.0M | 1.3M | ▼−1.7% Reduced · −23K sh |
| 14 | Somnigroup International IncSGI | 1.1% | $390.1M | 5.0M | ▲+6.1% Added · +287K sh |
| 15 | Flowserve CorpFLS | 1.1% | $368.5M | 5.0M | ▼−15% Reduced · −906K sh |
| 16 | Applovin Corp-Class AAPP | 1.0% | $344.8M | 669K | —Held |
| 17 | Meta Platforms Inc-Class AMETA | 0.9% | $319.1M | 567K | ▲New +567K sh |
| 18 | Ferguson Enterprises IncFERG | 0.9% | $304.3M | 1.3M | ▲+267% Added · +933K sh |
| 19 | Walt Disney CoDIS | 0.8% | $276.7M | 2.9M | ▲+22% Added · +519K sh |
| 20 | Alphabet Inc-CL AGOOGL | 0.8% | $263.8M | 738K | ▲+57% Added · +269K sh |
| 21 | Spotify Technology SaSPOT | 0.8% | $261.2M | 569K | ▲+67% Added · +228K sh |
| 22 | Carvana CoCVNA | 0.7% | $248.8M | 3.8M | ▲+465% Added · +3.1M sh |
| 23 | Doordash Inc - ADASH | 0.7% | $240.6M | 1.3M | ▼−9.3% Reduced · −134K sh |
| 24 | Intuitive Surgical IncISRG | 0.7% | $228.3M | 574K | ▲New +574K sh |
| 25 | Schwab (Charles) CorpSCHW | 0.7% | $227.6M | 2.5M | ▲+4.6% Added · +109K sh |
1 vehicle
Aggregated from SEC Form 13F filings (institutional long equity positions, reported quarterly, up to 45 days after quarter-end). Holdings are public domain, sourced to SEC EDGAR. The book totals, weighting, concentration and sectors are long equity only; disclosed put/call options are listed separately and excluded from those figures. Price-derived performance is withheld until the price-source policy and freshness gate are green. Every panel is one call to the Arkolith API & MCP server.