Ardelyx Inc (ARDX)
Who owns Ardelyx Inc (ARDX)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 89.0% of the shares are freely tradable; institutional investors hold 70.7%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 8.57 | 21,164,132 | +0.1 | 03/31/2026 |
| Vanguard Group Inc | 7.68 | 18,979,483 | +3.3 | 12/31/2025 |
| Millennium Management LLC | 7.22 | 17,842,370 | +49.8 | 03/31/2026 |
| State Street Corp | 5.51 | 13,604,307 | +14.2 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.20 | 10,365,512 | +0.0 | 03/31/2026 |
| HHG PLC | 3.39 | 8,371,234 | -42.3 | 03/31/2026 |
| Delaware Management Holdings Inc | 3.31 | 8,169,369 | -12.4 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 2.70 | 6,661,693 | +0.0 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| State Street® SPDR® S&P® Biotech ETF | 3.43 | 8,483,227 | -0.6 | 05/31/2026 |
| Vanguard Total Stock Mkt Idx Inv | 3.00 | 7,404,867 | +0.0 | 04/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 15. Jul 2026 | Raab Michael | President & CEO | Sell | 41,668 | 5.06 | 210,923 |
| 15. Jul 2026 | Raab Michael | President & CEO | Other | 20,834 | 0.99 | 20,626 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character.
View all insider transactions →Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.