Great investors · Dan Sundheim · Q1 2026
What Dan Sundheim bought and sold in Q1 2026
D1 Capital Partners 13F portfolio as of Mar 31, 2026: 44 positions worth $11.2 bn. Largest: CART, MELI, JHX, DHR. Filed with the SEC on May 15, 2026.
The 13F is filed by D1 Capital Partners, not by Dan Sundheim personally: these are the whole firm's positions. A “position” is a distinct security in the filing (by CUSIP); share classes of the same company are shown added together.
Buys in Q1 2026
- NewNu HoldingsNU+3.3 pp
- NewThermo Fisher ScientificTMO+3.2 pp
- NewSomnigroup InternationalSGI+3.1 pp
- IncreasedDanaherDHR+2.9 pp
- IncreasedMercadoLibreMELI+2.3 pp
- IncreasedTexas InstrumentsTXN+2.2 pp
- NewCoupangCPNG+2.0 pp
- NewDoorDashDASH+1.9 pp
- NewCarvanaCVNA+1.9 pp
- IncreasedBroadcomAVGO+1.7 pp
- NewMartin Marietta MaterialsMLM+1.7 pp
- NewCelesticaCLS+1.4 pp
Sells in Q1 2026
- ReducedClean HarborsCLH−3.7 pp
- Sold outMeta PlatformsMETA−2.2 pp
- Sold outEntegrisENTG−1.9 pp
- Sold outLindeLIN−1.8 pp
- Sold outEchoStarECHO−1.8 pp
- Sold outSynopsysSNPS−1.6 pp
- ReducedSherwin-williamsSHW−1.4 pp
- ReducedXPOXPO−1.3 pp
- Sold outGE Healthcare TechnologiesGEHC−1.3 pp
- Sold outCore & MainCNM−1.2 pp
- ReducedFlowserveFLS−1.2 pp
- ReducedKnight-Swift Transportation HoldingsKNX−1.1 pp
39 companies with material moves, out of 52 positions with a change. Only moves of 0.5 points of the portfolio or more are listed, measured as “traded weight” (what was bought or sold, excluding price effects). Smaller changes exist and are not listed: a position may have gone up or down without appearing above.
The full 13F, line by line
D1 Capital Partners's Q1 2026 13F lists 44 lines of US-listed securities worth $11.2 bn; the largest is CART at 7.52% of the portfolio. It was accepted by the SEC on May 15, 2026 at 11:34 AM ET.
Against the previous quarter, it opened 16 positions (NU, TMO, SGI and CPNG and 12 more), closed 14 (META, ENTG, LIN and ECHO and 10 more), added to 13 (DHR, TXN, AVGO and MELI and 9 more) and trimmed 9 (CLH, FLS, XPO and KNX and 5 more). 6 lines show the same number of shares.
| # | Company | Shares | Value | Weight | Change in shares |
|---|---|---|---|---|---|
| 1 | Maplebear CART | 22.6 M | $845M | 7.52% | no change |
| 2 | MercadoLibre MELI | 373,675 | $646M | 5.75% | +66% |
| 3 | James Hardie Industries JHX | 28.3 M | $536M | 4.77% | +16% |
| 4 | Danaher DHR | 2.3 M | $437M | 3.89% | +312% |
| 5 | Flowserve FLS | 5.9 M | $432M | 3.84% | −23% |
| 6 | US Foods Holding USFD | 4.3 M | $395M | 3.52% | no change |
| 7 | Clean Harbors CLH | 1.3 M | $384M | 3.42% | −52% |
| 8 | Amazon.com AMZN | 1.8 M | $376M | 3.35% | +35% |
| 9 | Nu Holdings NU | 25.9 M | $372M | 3.31% | new |
| 10 | Thermo Fisher Scientific TMO | 725,005 | $356M | 3.17% | new |
| 11 | Somnigroup International SGI | 4.7 M | $347M | 3.09% | new |
| 12 | Texas Instruments TXN | 1.8 M | $340M | 3.03% | +261% |
| 13 | Sea SE | 4.1 M | $336M | 2.99% | +16% |
| 14 | Reddit RDDT | 2.5 M | $331M | 2.95% | +16% |
| 15 | Kilroy Realty KRC | 11.3 M | $318M | 2.83% | +8.4% |
| 16 | Knight-Swift Transportation Holdings KNX | 5.5 M | $316M | 2.82% | −29% |
| 17 | Broadcom AVGO | 981,495 | $304M | 2.70% | +174% |
| 18 | NVIDIA NVDA | 1.6 M | $274M | 2.44% | +36% |
| 19 | AppLovin APP | 669,282 | $266M | 2.37% | no change |
| 20 | XPO XPO | 1.3 M | $251M | 2.23% | −37% |
| 21 | Lineage LINE | 7.4 M | $242M | 2.16% | no change |
| 22 | Walt Disney DIS | 2.4 M | $227M | 2.02% | +6.3% |
| 23 | Charles Schwab SCHW | 2.4 M | $222M | 1.97% | −25% |
| 24 | Coupang CPNG | 11.6 M | $219M | 1.95% | new |
| 25 | DoorDash DASH | 1.4 M | $216M | 1.92% | new |
| 26 | Carvana CVNA | 668,432 | $210M | 1.87% | new |
| 27 | Capital One Financial COF | 1.1 M | $204M | 1.81% | +35% |
| 28 | Martin Marietta Materials MLM | 322,857 | $190M | 1.69% | new |
| 29 | Spotify Technology SPOT | 340,494 | $165M | 1.47% | −14% |
| 30 | Johnson Controls International JCI | 1.2 M | $160M | 1.43% | −9.6% |
| 31 | Celestica CLS | 541,556 | $153M | 1.36% | new |
| 32 | Sherwin-williams SHW | 473,753 | $152M | 1.35% | −51% |
| 33 | Alphabet GOOGL | 468,900 | $135M | 1.20% | new |
| 34 | Apollo Global Management APO | 1.2 M | $129M | 1.15% | no change |
| 35 | Taiwan Semiconductor Manufacturing TSM | 328,600 | $111M | 0.99% | new |
| 36 | Live Nation Entertainment LYV | 674,317 | $103M | 0.92% | new |
| 37 | Analog Devices ADI | 292,444 | $93.0M | 0.83% | new |
| 38 | Affirm Holdings AFRM | 1.9 M | $88.7M | 0.79% | +136% |
| 39 | Ferguson Enterprises FERG | 349,347 | $81.5M | 0.73% | new |
| 40 | TopBuild BLD | 213,433 | $75.0M | 0.67% | new |
| 41 | Autodesk ADSK | 308,907 | $74.0M | 0.66% | −32% |
| 42 | Unity Software U | 3.3 M | $71.5M | 0.64% | new |
| 43 | Hyperliquid Strategies PURR | 8.0 M | $40.7M | 0.36% | no change |
| 44 | ASML Holding ASML | 6,800 | $9.0M | 0.08% | new |
Positions it closed (14)
- Meta Platforms METAwas 2.32% · 376,162 shares
- Entegris ENTGwas 1.96% · 2.5 M shares
- Linde LINwas 1.93% · 483,808 shares
- EchoStar ECHOwas 1.88% · 1.9 M shares
- Synopsys SNPSwas 1.66% · 378,350 shares
- GE Healthcare Technologies GEHCwas 1.35% · 1.8 M shares
- Core & Main CNMwas 1.29% · 2.6 M shares
- Arista Networks ANETwas 1.18% · 962,429 shares
- APi Group APGwas 0.79% · 2.2 M shares
- Qnity Electronics Qwas 0.72% · 937,135 shares
- Bank of America BACwas 0.64% · 1.2 M shares
- Nisource NIwas 0.47% · 1.2 M shares
- American Electric Power AEPwas 0.37% · 344,100 shares
- Medline MDLNwas 0.15% · 377,131 shares
One row per line of the filing (by CUSIP): share classes of the same company are listed separately here. “Change in shares” compares the count with the previous quarter, split-adjusted; the value is the one reported in the 13F at quarter end, not today's price.
Original documents: D1 Capital Partners's 13F filings on EDGAR (SEC) ↗
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Source: 13F filings with the SEC. A 13F shows the portfolio at quarter-end and is filed up to 45 days later: these are not real-time positions. Not investment advice.