RDST Capital LLC holds a focused book of 20 stocks worth $1.0B as of Q1 2026 (disclosed May 15, 2026, a ~45-day 13F lag). This quarter they opened Ares Management Corp - A and trimmed Union Pacific Corp. Their largest long position is Union Pacific Corp at 7% of the equity book.
Top-heavy: focused book
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
100% mapped to company sectors
Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.
Estimated $ traded · quarter-end prices, no cost basis
Other tracked managers holding the same core names as RDST Capital LLC
| Manager / fund | Shared names | Their $ in those |
|---|---|---|
| BlackRock, Inc. | 21 / 20 | $530.1B |
| VANGUARD CAPITAL MANAGEMENT LLC | 21 / 20 | $430.1B |
| STATE STREET CORP | 21 / 20 | $305.7B |
| FMR LLC | 21 / 20 | $258.9B |
| GEODE CAPITAL MANAGEMENT, LLC | 21 / 20 | $179.7B |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 21 / 20 | $133.4B |
| JPMORGAN CHASE & CO | 21 / 20 | $128.9B |
| MORGAN STANLEY | 21 / 20 | $123.3B |
Ranked by the share of each fund's own book sitting in the names it shares with RDST Capital LLC: only funds sharing at least a tenth of the book qualify. Index giants, bank custody books and market makers are excluded. They hold everything, so their overlap says nothing.
Bars show each stock's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Union Pac Corp COM | $70.8M | 291.6K | 6.8% | ▼−31% Reduced · −128K sh | |
| 2 | Datadog Inc CL A COM | $70.5M | 597.1K | 6.8% | ▲+60% Added · +225K sh | |
| 3 | Blue Owl Capital Inc COM CL A | $69.8M | 7.65M | 6.7% | ▲+22% Added · +1.4M sh | |
| 4 | Coupang Inc CL A | $68.9M | 3.65M | 6.6% | ▲+69% Added · +1.5M sh | |
| 5 | Amazon Com Inc COM | $67.7M | 325.0K | 6.5% | ▲+4.3% Added · +13K sh | |
| 6 | Microsoft Corp COM | $66.8M | 180.6K | 6.4% | ▲+16% Added · +25K sh | |
| 7 | James Hardie Inds PLC ORD SHS | $61.3M | 3.24M | 5.9% | ▲+20% Added · +545K sh | |
| 8 | Marvell Technology Inc COM | $60.3M | 608.8K | 5.8% | ▲+136% Added · +351K sh | |
| 9 | Taiwan Semiconductor Manufac SPONSORED ADS | $60.0M | 177.6K | 5.8% | ▲+111% Added · +94K sh | |
| 10 | Meta Platforms Inc CL A | $57.0M | 99.6K | 5.5% | ▲+60% Added · +37K sh | |
| 11 | Martin Marietta Matls Inc COM | $56.0M | 95.1K | 5.4% | ▼−6.3% Reduced · −6K sh | |
| 12 | Doordash Inc CL A | $55.5M | 369.5K | 5.3% | ▲+177% Added · +236K sh | |
| 13 | Carvana Co CL A | $55.0M | 174.8K | 5.3% | ▲+43% Added · +53K sh | |
| 14 | Marketaxess Hldgs Inc COM | $48.7M | 295.3K | 4.7% | ▼−5.0% Reduced · −15K sh | |
| 15 | Entegris Inc COM | $41.9M | 357.1K | 4.0% | ▼−68% Reduced · −749K sh | |
| 16 | Ares Management Corporation CL A COM STK | $35.0M | 321.0K | 3.4% | ▲New New position | |
| 17 | Hubspot Inc COM | $34.5M | 141.2K | 3.3% | ▼−11% Reduced · −17K sh | |
| 18 | Floor & Decor Hldgs Inc CL A | $27.0M | 531.3K | 2.6% | ▼−43% Reduced · −394K sh | |
| 19 | Apollo Global Mgmt Inc COM | $23.4M | 210.4K | 2.3% | ▲+17% Added · +31K sh | |
| 20 | Servicenow Inc COM | $8.0M | 76.6K | 0.8% | ▲New New position |
The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
This fund page is the Follow view. The Build view lets your agent pull holdings, quarter changes, overlap, and source filings through API or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/funds/1912187/holdings"
Use Arkolith to show RDST Capital LLC's latest holdings, largest changes, and filing provenance.
As-of date vs the date the SEC received each filing
| Quarter | As of | Filed | Positions | Value | Form |
|---|---|---|---|---|---|
| Q1 2026 | Mar 31, 2026 | May 15, 2026 | 20 | $1.0B | 13F-HR |
| Q4 2025 | Dec 31, 2025 | Feb 17, 2026 | 19 | $1.1B | 13F-HR |
| Q3 2025 | Sep 30, 2025 | Nov 18, 2025 | 19 | $1.1B | 13F-HR/A |
Holdings from SEC EDGAR 13F-HR filings, updated quarterly, filed up to 45 days after quarter-end. Public domain. The book and weighting are long equity only; disclosed put/call options are listed separately and excluded from those totals. Price-derived performance is withheld until the price-source policy and freshness gate are green.