RDST Capital LLC — 13F Holdings & Portfolio
CIK 1912187 · latest 13F-HR filed 2026-08-14
RDST Capital LLC manages $1.21B in 13F-reported U.S. long-equity assets across 18 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are JHX (8.70%), TSM (8.07%), MLM (7.81%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 2 new positions, exited 4, added to 10, and trimmed 5.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
SUITE 200
SEATTLE, WA 98109
$1.21B
Long-equity book
18
Distinct positions
2026-06-30
Filed 2026-08-14
+2 / −4 / ↑10 / ↓5
vs 2026-03-31
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- ARES MANAGEMENT CORPORATION$53.1M +151.5%
- FLOOR & DECOR HLDGS INC$53.0M +196.2%
- JAMES HARDIE INDS PLC$43.8M +71.4%
- MARTIN MARIETTA MATLS INC$38.3M +68.5%
- TAIWAN SEMICONDUCTOR MANUFAC$37.4M +62.3%
Top Trims
- DATADOG INC-$31.9M -45.3%
- MARKETAXESS HLDGS INC-$20.7M -42.4%
- CARVANA CO-$15.2M -27.6%
- APOLLO GLOBAL MGMT INC-$10.1M -43.3%
- MICROSOFT CORP-$4.4M -6.6%
Exited Positions
- BLUE OWL CAPITAL INC$69.8M
- MARVELL TECHNOLOGY INC$60.3M
- ENTEGRIS INC$41.9M
- SERVICENOW INC$8.0M
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | JAMES HARDIE INDS PLC | JHX | G4253H101 | $105.1M | 8.70% | 4,015,067 | SH |
| 2 | TAIWAN SEMICONDUCTOR MANUFAC | TSM | 874039100 | $97.4M | 8.07% | 203,998 | SH |
| 3 | MARTIN MARIETTA MATLS INC | MLM | 573284106 | $94.3M | 7.81% | 163,550 | SH |
| 4 | UNION PAC CORP | UNP | 907818108 | $89.2M | 7.39% | 328,055 | SH |
| 5 | ARES MANAGEMENT CORPORATION | ARES | 03990B101 | $88.1M | 7.29% | 791,316 | SH |
| 6 | AMAZON COM INC | AMZN | 023135106 | $82.8M | 6.86% | 347,474 | SH |
| 7 | FLOOR & DECOR HLDGS INC | FND | 339750101 | $80.0M | 6.62% | 1,347,061 | SH |
| 8 | META PLATFORMS INC | META | 30303M102 | $79.2M | 6.56% | 140,667 | SH |
| 9 | DOORDASH INC | DASH | 25809K105 | $71.1M | 5.89% | 385,140 | SH |
| 10 | COUPANG INC | CPNG | 22266T109 | $70.1M | 5.80% | 4,034,829 | SH |
| 11 | NVIDIA CORPORATION | NVDA | 67066G104 | $65.8M | 5.45% | 328,839 | SH |
| 12 | MICROSOFT CORP | MSFT | 594918104 | $62.4M | 5.17% | 167,344 | SH |
| 13 | HUBSPOT INC | HUBS | 443573100 | $60.6M | 5.01% | 331,796 | SH |
| 14 | BROADCOM INC | AVGO | 11135F101 | $41.8M | 3.46% | 110,720 | SH |
| 15 | CARVANA CO | CVNA | 146869102 | $39.8M | 3.30% | 604,579 | SH |
| 16 | DATADOG INC | DDOG | 23804L103 | $38.5M | 3.19% | 148,040 | SH |
| 17 | MARKETAXESS HLDGS INC | MKTX | 57060D108 | $28.0M | 2.32% | 247,112 | SH |
| 18 | APOLLO GLOBAL MGMT INC | APO | 03769M106 | $13.3M | 1.10% | 112,385 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-06-30 | 2026-08-14 | $1.21B | 18 | 0001912187-26-000007 |
| 2026-03-31 | 2026-05-15 | $1.04B | 20 | 0001912187-26-000005 |
| 2025-12-31 | 2026-02-17 | $1.06B | 19 | 0001420506-26-000500 |
| 2025-09-30 | 2025-11-18 | $1.06B | 19 | 0001420506-25-003460 |