RDST Capital LLC
In its 13F for Q3 2025 (holdings as of September 30, 2025, filed November 18, 2025), RDST Capital LLC reported 19 stock positions worth $1.1 billion. Its top holding was Entegris (ENTG) at 8.3% of the portfolio, followed by Union Pacific (UNP, 7.5%) and Blue Owl Capital (OWL, 7.2%). Compared with Q2 2025, it opened 2 new positions, sold out of 1, added to 7 and reduced 10. The biggest buy was a new position in Union Pacific (UNP) and the biggest sale an exit from Restaurant Brands Intern (QSR).
- Most Recent 13F
- Q2 2026
- Location
- SEATTLE, WA
- CIK
- 0001912187
- Portfolio Value
- $1.1B (Q3 2025)
- SEC Filing
- 0001420506-25-003460 ↗ filed Nov 18, 2025
Holdings Value
Holdings 19 stocks · $1.1B
| ENTG Entegris Inc. | 8.33% | 956,780 | $88.5M | Reduce -13.2% |
| UNP Union Pacific Corp. | 7.49% | 336,645 | $79.6M | New |
| OWL Blue Owl Capital Inc. | 7.16% | 4,490,815 | $76.0M | Add +32.8% |
| MSFT Microsoft Corp. | 6.85% | 140,355 | $72.7M | Reduce -11.3% |
| MLM Martin Marietta Materials | 6.62% | 111,575 | $70.3M | Add +5.7% |
| MRVL Marvell Technology Inc. | 6.53% | 825,485 | $69.4M | Add +90.1% |
| DDOG Datadog Inc. Class A | 6.37% | 475,095 | $67.7M | Add +1.8% |
| AMZN Amazon.com Inc. | 5.83% | 281,775 | $61.9M | Reduce -9.7% |
| HUBS HubSpot Inc. | 5.35% | 121,505 | $56.8M | New |
| FND Floor & Decor Holdings Inc. Class A | 5.25% | 756,750 | $55.8M | Add +13.0% |
| CSX CSX Corp. | 5.08% | 1,517,825 | $53.9M | Reduce -47.5% |
| AMAT Applied Materials Inc. | 5.03% | 261,147 | $53.5M | Reduce -32.1% |
| MKTX Marketaxess Holdings Inc. | 4.62% | 281,547 | $49.1M | Add +158.3% |
| DCO Ducommun Inc. | 4.54% | 501,496 | $48.2M | Reduce -11.8% |
| WDAY Workday Inc. Class A | 4.52% | 199,545 | $48.0M | Reduce -18.3% |
| CVNA Carvana Co. | 3.81% | 107,205 | $40.4M | Reduce -21.7% |
| META Meta Platforms Inc. Class A | 3.52% | 50,955 | $37.4M | Add +40.2% |
| APO Apollo Global Management Inc. | 1.85% | 147,055 | $19.6M | Reduce -0.6% |
| DASH DoorDash Inc. Class A | 1.24% | 48,570 | $13.2M | Reduce -71.3% |
Portfolio Sells Q2 2025 → Q3 2025
| QSR Restaurant Brands Intern | Sold out | 0.00% | −6.41 |
| CSX CSX Corp. | Reduce -47.5% | 5.08% | −4.34 |
| DASH DoorDash Inc. Class A | Reduce -71.3% | 1.24% | −2.93 |
| AMAT Applied Materials Inc. | Reduce -32.1% | 5.03% | −2.00 |
| WDAY Workday Inc. Class A | Reduce -18.3% | 4.52% | −1.33 |
| MSFT Microsoft Corp. | Reduce -11.3% | 6.85% | −1.02 |
| AMZN Amazon.com Inc. | Reduce -9.7% | 5.83% | −1.02 |
| CVNA Carvana Co. | Reduce -21.7% | 3.81% | −0.80 |
| ENTG Entegris Inc. | Reduce -13.2% | 8.33% | −0.56 |
| APO Apollo Global Management Inc. | Reduce -0.6% | 1.85% | −0.25 |
| DCO Ducommun Inc. | Reduce -11.8% | 4.54% | −0.16 |
Portfolio Buys Q2 2025 → Q3 2025
| UNP Union Pacific Corp. | New | 7.49% | +7.49 |
| HUBS HubSpot Inc. | New | 5.35% | +5.35 |
| MRVL Marvell Technology Inc. | Add +90.1% | 6.53% | +3.18 |
| MKTX Marketaxess Holdings Inc. | Add +158.3% | 4.62% | +2.19 |
| META Meta Platforms Inc. Class A | Add +40.2% | 3.52% | +0.84 |
| MLM Martin Marietta Materials | Add +5.7% | 6.62% | +0.83 |
| OWL Blue Owl Capital Inc. | Add +32.8% | 7.16% | +0.67 |
| FND Floor & Decor Holdings Inc. Class A | Add +13.0% | 5.25% | +0.17 |
| DDOG Datadog Inc. Class A | Add +1.8% | 6.37% | +0.11 |
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 |