SuperworthDan Sundheim
D1 Capital PartnersFundamental long-short
Fundamental long-short investor across consumer, tech and financials.
- US stock portfolio
- $34.8B
- Positions
- 55
- Quarter
- Q2 2026
- 13F filed with the SEC
- In its top 10
- 77%
- Active share
- 94%
- different from Russell 1000
- Turnover a year
- 79%
- Median holding
- 0.3 yrs
How the picks did
Trailed its closest index (mostly the S&P 500 Growth) by 9.5 pts a year over 5 years (20 quarters).
How this is measured
Each 13F report is held from the week it was filed to the week of the next, priced weekly without dividends, and compared with the price of an ETF tracking the index it was closest to that quarter. No shorts, cash, bonds or options. Small and delisted companies we do not price are left out, and a quarter counts only when 70% or more of the portfolio is priced. Past results say nothing about future ones.
13F shows US long stock positions only, filed up to 45 days after the quarter.
Largest holdings
Each tile's size is its share of the portfolio at the end of Q2 2026. Green was bought or added to that quarter, red trimmed.
What changed in Q2 2026
Bought
Its bets against Russell 1000
Holds much more than the index
Holds much less, or none
By sector
Every position, Q2 2026
| Company | Share of portfolio | Value | Change |
|---|---|---|---|
| SPCXSpaceX | 61.91% | $21.5B | new |
| CARTMaplebear | 3.07% | $1.1B | added |
| JHXJames Hardie Industries | 2.07% | $721.1M | trimmed |
| NUNu | 1.71% | $593.4M | added |
| JCIJohnson Controls International | 1.58% | $548.2M | added |
| MELIMercadoLibre | 1.35% | $471M | trimmed |
| USFDUS Foods | 1.32% | $460.3M | added |
| DHRDanaher | 1.25% | $434.7M | trimmed |
| SHWSherwin-Williams | 1.24% | $431.3M | added |
| RDDTReddit | 1.23% | $427.8M | added |
| TMOThermo Fisher Scientific | 1.18% | $409.7M | added |
| KRCKilroy Realty | 1.13% | $393.4M | trimmed |
| CLHClean Harbors | 1.13% | $393M | trimmed |
| SGISomnigroup International | 1.12% | $390.1M | added |
| FLSFlowserve | 1.06% | $368.5M | trimmed |
| APPAppLovin | 0.99% | $344.8M | |
| METAMeta Platforms | 0.92% | $319.1M | new |
| FERGFerguson | 0.87% | $304.3M | added |
| DISWalt Disney | 0.80% | $276.7M | added |
| GOOGLAlphabet | 0.76% | $263.8M | added |
| SPOTSpotify Technology | 0.75% | $261.2M | added |
| CVNACarvana | 0.72% | $248.8M | added |
| DASHDoorDash | 0.69% | $240.6M | trimmed |
| ISRGIntuitive Surgical | 0.66% | $228.3M | new |
| SCHWCharles Schwab | 0.65% | $227.6M | added |
| COFCapital One Financial | 0.63% | $219.4M | trimmed |
| LINELineage | 0.59% | $204.8M | trimmed |
| MLMMartin Marietta Materials | 0.57% | $199M | added |
| COMPCompass | 0.54% | $187.7M | new |
| CPNGCoupang | 0.51% | $178.8M | trimmed |
| LINLinde | 0.51% | $177.2M | new |
| TSLATesla | 0.49% | $169M | new |
| LSCCLattice Semiconductor | 0.48% | $165.8M | new |
| SESea | 0.46% | $160.8M | trimmed |
| AFRMAffirm | 0.45% | $155.6M | trimmed |
| AMZNAmazon.com | 0.43% | $149.7M | trimmed |
| BLDRBuilders FirstSource | 0.42% | $146.7M | new |
| APOApollo Global Management | 0.39% | $137.1M | |
| QQnity Electronics | 0.39% | $136.2M | new |
| TXNTexas Instruments | 0.35% | $120.9M | trimmed |
| MPWRMonolithic Power Systems | 0.34% | $117.6M | new |
| AMRZAmrize | 0.34% | $116.6M | new |
| UUnity Software | 0.29% | $102.1M | added |
| LFUSLittelfuse | 0.29% | $102.1M | new |
| SHOPShopify | 0.27% | $94.9M | new |
| CRWVCoreWeave | 0.18% | $62.6M | new |
| SNOWSnowflake | 0.16% | $55M | new |
| PURRHyperliquid Strategies | 0.14% | $49.9M | trimmed |
| MAIRMadison Air Solutions | 0.14% | $48.8M | new |
| ADIAnalog Devices | 0.12% | $40.5M | trimmed |
| CBRSCerebras Systems | 0.10% | $33.1M | new |
| GOOGAlphabet | 0.09% | $30M | new |
| STXSeagate Technology | 0.08% | $29.1M | new |
| QNTQuantinuum | 0.07% | $24.5M | new |
| DPCDPC | 0.02% | $6.1M | new |
About these numbers
A 13F lists a manager's US stock positions at the end of a quarter and is filed up to 45 days later. It leaves out shorts, cash, bonds and most non-US holdings, so it is a picture of the stock book, not the whole firm. The filings on SEC EDGAR