ARDX: Ardelyx, Inc. insider trading, 5% holders and institutional ownership
From public SEC filings: open-market insider purchases and sales (Form 4, last 180 days), holders of 5% or more (Schedules 13D and 13G) and institutional ownership (Form 13F). Insider and 5% data delayed 48 hours.
Insider trading
0 open-market buys totaling - and 0 sales totaling - in the last 180 days.
Activist and 5% holders
| Filed | What | Holder | Stake | Change | Filing |
|---|---|---|---|---|---|
| 2026-08-14 | New 13G stake | Rubric Capital Management LP | 6.56% | SEC | |
| 2026-08-11 | 13G amendment | Integrated Core Strategies (US) LLC | 5.70% | SEC |
Institutional ownership (Q2 2026)
250 institutions reported holding $898.36M of Ardelyx, Inc. on Form 13F (242 the quarter before). 40 opened a new position and 34 sold out. Shares held by institutions: +5%.
| Largest holders | Shares | Value |
|---|---|---|
| BlackRock, Inc. | 23,504,630 | $119.87M |
| Rubric Capital Management LP | 16,202,700 | $82.63M |
| MILLENNIUM MANAGEMENT LLC | 13,900,773 | $70.89M |
| STATE STREET CORP | 13,356,128 | $68.12M |
| VANGUARD CAPITAL MANAGEMENT LLC | 10,471,494 | $53.40M |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 9,546,732 | $48.69M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 8,026,774 | $40.94M |
| GEODE CAPITAL MANAGEMENT, LLC | 6,401,736 | $32.66M |
| Jupiter Topco LLC | 5,302,311 | $27.04M |
| TWO SIGMA INVESTMENTS, LP | 5,209,823 | $26.57M |
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