RDST Capital LLC 13F: Portfolio & Holdings
In its most recent SEC Form 13F-HR filing (as of Q1 2026), RDST Capital LLC (SEC CIK 0001912187) reported 20 positions with a combined market value of $1.0 billion. The Seattle-based hedge fund has Technology as its largest sector at 32.9% of exposure.
Its largest holdings are Union Pacific (UNP) at 6.8%, Datadog INC (DDOG) at 6.8%, and Blue Owl Capital INC (OWL) at 6.7%.
The largest position reduction was Entegris (ENTG) (-4.7% of portfolio weight). See the fund’s full Q1 2026 buys, sells, and portfolio changes →
Based on published SEC 13F filings, RDST Capital's closest peer funds by portfolio overlap are Massachusetts Institute of Technology (94.4%), Greenoaks Capital Partners LLC (82.6%), and CAS Investment Partners, LLC (81.7%).
- 13F AUM
- $1.0B
- Equity Positions
- 20
- Top-10 Concentration
- 62.9%
- Largest Sector · 32.9%
- Technology
- Longest-Held Position · 18 qtrs
- MSFT
- Median Holding Period
- 6 Qtrs
What are RDST Capital’s largest 13F holdings as of Q1 2026?
Largest 13F positions disclosed by RDST Capital, ranked by portfolio weight. Full multi-quarter history and the broader institutional holder base for each ticker linked per row.
| # | Issuer | Ticker | Sector | Weight | Position Value | Detail |
|---|---|---|---|---|---|---|
| 1 | UNION PACIFIC | UNP | Industrials | 6.8% | $70.8M | Position History All Holders |
| 2 | DATADOG INC | DDOG | Technology | 6.8% | $70.5M | Position History All Holders |
| 3 | BLUE OWL CAPITAL INC | OWL | Financial Services | 6.7% | $69.8M | Position History All Holders |
| 4 | COUPANG INC | CPNG | Consumer Cyclical | 6.6% | $68.9M | Position History All Holders |
| 5 | AMAZON.COM | AMZN | Consumer Cyclical | 6.5% | $67.7M | Position History All Holders |
| 6 | MICROSOFT | MSFT | Technology | 6.4% | $66.8M | Position History All Holders |
| 7 | JAMES HARDIE INDS PLC | JHX | Basic Materials | 5.9% | $61.3M | Position History All Holders |
| 8 | MARVELL TECHNOLOGY INC | MRVL | Technology | 5.8% | $60.3M | Position History All Holders |
| 9 | TAIWAN SEMIC-ADR | TSM | Technology | 5.8% | $60.0M | Position History All Holders |
| 10 | META PLATFORMS INC | META | Communication Services | 5.5% | $57.0M | Position History All Holders |
View RDST Capital's Q1 2026 portfolio changes and trading report →
Portfolio composition
Sectors, concentrations, and a tap-through treemap of every position in the fund's latest 13F.
Holding period analytics
Distribution of holding periods for all 45 stocks the fund has ever held (up to selected quarter):
Which Funds Hold a Similar Portfolio to RDST Capital?
Ranked by percentage of the peer fund's 13F equity portfolio that overlaps with RDST Capital's positions in Q1 2026.
| # | Fund | Shared Positions | Overlap % |
|---|---|---|---|
| 1 | Massachusetts Institute of Technology | 2 | 94.4% |
| 2 | Greenoaks Capital Partners LLC | 4 | 82.6% |
| 3 | CAS Investment Partners, LLC | 1 | 81.7% |
| 4 | Joho Capital LLC | 3 | 62.7% |
| 5 | BlueSpruce Investments, LP | 4 | 56.5% |
| 6 | RV Capital AG | 3 | 55.3% |
| 7 | Altarock Partners LP | 2 | 55.0% |
| 8 | Newlands Management Operations LLC | 4 | 54.5% |
| 9 | Voyager Global Management LP | 4 | 49.7% |
| 10 | Harvard Management CO INC | 5 | 46.1% |
How Has RDST Capital's AUM Changed Over Time?
Quarterly 13F-reported AUM for RDST Capital, derived from aggregate reported position market values disclosed to the U.S. SEC.
| Quarter | 13F AUM (USD) | QoQ Change |
|---|---|---|
| Q4 2021 | $147M | — |
| Q1 2022 | $141M | -0.0B |
| Q2 2022 | $141M | +0.0B |
| Q3 2022 | $135M | -0.0B |
| Q4 2022 | $164M | +0.0B |
| Q1 2023 | $183M | +0.0B |
| Q2 2023 | $229M | +0.0B |
| Q3 2023 | $265M | +0.0B |
| Q4 2023 | $314M | +0.0B |
| Q1 2024 | $402M | +0.1B |
| Q2 2024 | $380M | -0.0B |
| Q3 2024 | $443M | +0.1B |
| Q4 2024 | $705M | +0.3B |
| Q1 2025 | $703M | -0.0B |
| Q2 2025 | $1.0B | +0.3B |
| Q3 2025 | $1.1B | +0.1B |
| Q4 2025 | $1.1B | -0.0B |
| Q1 2026 | $1.0B | -0.0B |
Methodology & FAQ
How We Track RDST Capital Holdings
Our data is systematically aggregated directly from quarterly Form 13F-HR disclosures submitted to the U.S. Securities and Exchange Commission (SEC).
- Who Must File (Reporting Threshold): This dataset includes filings from U.S. institutional investment managers, hedge funds, mutual funds, university endowments, and family offices managing at least $100 million in Section 13(f) securities (including equities, options, convertibles, ETFs, and warrants).
- What is Included (Data Scope): By regulation, 13F filings include long positions in U.S. exchange-listed stocks, ETFs, shares of closed-end investment companies, and convertible debt, as defined in the SEC's official Section 13(f) securities list . For listed options (calls/puts) the reported value is based on the notional value.
- Portfolio Weight Explained (Metric Definition): “Portfolio Weight” shows how much of a fund's total reported 13F portfolio value (excluding listed options) is allocated to a specific position on the reporting date.
- How to Use This Data (Interpretation): Quarter-over-quarter changes in shares and portfolio weight reflect a combination of active trading and market price movements. These are descriptive metrics of fund allocation, not explicit buy or sell signals.
What does RDST Capital's 13F filing disclose about their portfolio?
A Form 13F-HR filed by RDST Capital with the U.S. SEC discloses all long positions in Section 13(f) securities — U.S.-listed equities, ETFs, closed-end funds, and listed put/call options — held at quarter-end with a market value of at least $200,000 or 10,000 or more shares. Pactolio aggregates these filings to surface the manager’s reported portfolio weights, share counts, and quarter-over-quarter portfolio changes in a structured format. The filing represents a point-in-time snapshot of disclosed long-side exposure, not a real-time or complete view of the fund’s total book.
How do you measure conviction in RDST Capital's portfolio allocations?
Conviction is measured by portfolio weight — the percentage of RDST Capital’s total reported 13F market value allocated to a given position — rather than by absolute share count or dollar value alone. A position representing a disproportionately large share of the fund’s disclosed book signals high-conviction allocation, regardless of whether it ranks among the fund’s largest absolute holdings.
What is excluded from RDST Capital's 13F — short positions, swaps, and derivatives?
SEC Form 13F requires disclosure of long positions only. Specifically excluded are: short interest, total return swaps, credit default swaps, and all OTC derivatives — none of which appear in 13F filings regardless of position size. Listed put and call options must be disclosed but are excluded from portfolio weight calculations on this platform so that reported weights reflect direct equity exposure and remain comparable across filers. This means RDST Capital’s 13F represents the reported long book, which may differ materially from its net economic exposure.
When is RDST Capital's 13F data available, and how large is the reporting lag?
Investment managers must submit Form 13F within 45 calendar days of each quarter-end (the T+45 deadline). Pactolio ingests filings directly from SEC EDGAR as they are published — managers who file early appear in our system before the deadline, while late filers are captured on their actual filing date. The quarter label shown at the top of this page reflects the most recently processed 13F cycle for RDST Capital. The inherent reporting lag means the data always reflects positions as of the prior quarter-end, not current holdings.
Who must file a Form 13F with the SEC, and does RDST Capital qualify?
Under SEC Rule 13f-1, any investment manager — including hedge funds, family offices, registered investment advisers, pension funds, and university endowments — that exercises investment discretion over $100 million or more in Section 13(f) securities at any point during a calendar year must file Form 13F for that year. RDST Capital meets this threshold, which is why its holdings are publicly disclosed and accessible on this platform. The $100 million threshold is evaluated on a rolling basis, meaning new filers can enter and existing filers can exit the disclosure regime as AUM crosses that boundary.