RDST Capital LLC
In its 13F for Q2 2025 (holdings as of June 30, 2025, filed August 12, 2025), RDST Capital LLC reported 18 stock positions worth $1.0 billion. Its top holding was CSX (CSX) at 9.4% of the portfolio, followed by Entegris (ENTG, 8.9%) and Microsoft (MSFT, 7.9%). Compared with Q1 2025, it opened 3 new positions, sold out of 1, added to 9 and reduced 6. The biggest buy was a new position in Martin Marietta Materials (MLM) and the biggest sale Restaurant Brands Intern (QSR, shares −21%).
- Most Recent 13F
- Q2 2026
- Location
- SEATTLE, WA
- CIK
- 0001912187
- Portfolio Value
- $1.0B (Q2 2025)
- SEC Filing
- 0001420506-25-001860 ↗ filed Aug 12, 2025
Holdings Value
Holdings 18 stocks · $1.0B
| CSX CSX Corp. | 9.42% | 2,888,885 | $94.3M | Add +26.7% |
| ENTG Entegris Inc. | 8.89% | 1,102,675 | $88.9M | Add +42.4% |
| MSFT Microsoft Corp. | 7.87% | 158,240 | $78.7M | Reduce -22.4% |
| AMAT Applied Materials Inc. | 7.04% | 384,660 | $70.4M | Add +16.7% |
| AMZN Amazon.com Inc. | 6.84% | 312,080 | $68.5M | Add +26.8% |
| OWL Blue Owl Capital Inc. | 6.49% | 3,381,080 | $65.0M | Add +72.1% |
| QSR Restaurant Brands Intern | 6.41% | 968,064 | $64.2M | Reduce -20.6% |
| DDOG Datadog Inc. Class A | 6.26% | 466,665 | $62.7M | Add +42.5% |
| WDAY Workday Inc. Class A | 5.85% | 244,090 | $58.6M | Add +5.0% |
| MLM Martin Marietta Materials | 5.79% | 105,540 | $57.9M | New |
| FND Floor & Decor Holdings Inc. Class A | 5.08% | 669,870 | $50.9M | New |
| DCO Ducommun Inc. | 4.70% | 568,791 | $47.0M | Reduce -9.5% |
| CVNA Carvana Co. | 4.61% | 136,885 | $46.1M | Reduce -38.6% |
| DASH DoorDash Inc. Class A | 4.18% | 169,550 | $41.8M | Reduce -0.5% |
| MRVL Marvell Technology Inc. | 3.36% | 434,175 | $33.6M | Reduce -12.6% |
| META Meta Platforms Inc. Class A | 2.68% | 36,355 | $26.8M | New |
| MKTX Marketaxess Holdings Inc. | 2.43% | 109,005 | $24.3M | Add +218.5% |
| APO Apollo Global Management Inc. | 2.10% | 147,990 | $21.0M | Add +26.2% |
Portfolio Sells Q1 2025 → Q2 2025
| QSR Restaurant Brands Intern | Reduce -20.6% | 6.41% | −5.13 |
| COLD Americold Realty Trust Inc. | Sold out | 0.00% | −3.09 |
| MSFT Microsoft Corp. | Reduce -22.4% | 7.87% | −3.01 |
| CVNA Carvana Co. | Reduce -38.6% | 4.61% | −2.02 |
| MRVL Marvell Technology Inc. | Reduce -12.6% | 3.36% | −0.99 |
| DCO Ducommun Inc. | Reduce -9.5% | 4.70% | −0.49 |
| DASH DoorDash Inc. Class A | Reduce -0.5% | 4.18% | −0.25 |
Portfolio Buys Q1 2025 → Q2 2025
| MLM Martin Marietta Materials | New | 5.79% | +5.79 |
| FND Floor & Decor Holdings Inc. Class A | New | 5.08% | +5.08 |
| META Meta Platforms Inc. Class A | New | 2.68% | +2.68 |
| DDOG Datadog Inc. Class A | Add +42.5% | 6.26% | +1.65 |
| MKTX Marketaxess Holdings Inc. | Add +218.5% | 2.43% | +1.38 |
| OWL Blue Owl Capital Inc. | Add +72.1% | 6.49% | +0.89 |
| AMAT Applied Materials Inc. | Add +16.7% | 7.04% | +0.24 |
| AMZN Amazon.com Inc. | Add +26.8% | 6.84% | +0.18 |
| CSX CSX Corp. | Add +26.7% | 9.42% | −0.12 |
| APO Apollo Global Management Inc. | Add +26.2% | 2.10% | −0.18 |
| ENTG Entegris Inc. | Add +42.4% | 8.89% | −0.74 |
| WDAY Workday Inc. Class A | Add +5.0% | 5.85% | −1.87 |
All Filings
| Quarter | Positions | 13F Reported Value | Top Holdings |
|---|---|---|---|
| Q2 2026 | 18 | $1.2B | JHX, TSM, MLM, UNP, ARES |
| Q1 2026 | 20 | $1.0B | UNP, DDOG, OWL, CPNG, AMZN |
| Q4 2025 | 19 | $1.1B | UNP, OWL, ENTG, MSFT, AMZN |
| Q3 2025Amended | 19 | $1.1B | ENTG, UNP, OWL, MSFT, MLM |
| Q2 2025 | 18 | $1.0B | CSX, ENTG, MSFT, AMAT, AMZN |
| Q1 2025 | 16 | $703.4M | QSR, MSFT, ENTG, CSX, WDAY |
| Q4 2024 | 20 | $705.0M | MSFT, CSX, ENTG, QSR, WDAY |
| Q3 2024 | 16 | $443.2M | QSR, MSFT, OWL, APO, DCO |
| Q2 2024 | 17 | $380.1M | COLD, QSR, MSFT, AJG, APO |
| Q1 2024 | 18 | $402.2M | QSR, MSFT, COLD, APO, AJG |