Ardelyx, Inc.
ARDX- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001437402
In the last 90 days, Ardelyx, Inc. insiders filed 0 open-market purchases and 9 sales; 250 institutions reported holding it in 13F filings for Q2 2026, worth $906.4M in total; no superinvestor holds it.
Holders of 5% or more of ARDX
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Ardelyx, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Vanguard Group Inc | 13G/A | 6.70%16.0M shares | – | Jul 29, 20251 filing | Jul 29, 2025 | SEC |
| Janus Henderson Group PLC | 13G/A | 5.70%13.8M shares | −0.60 ppfrom 6.30% | Dec 6, 20245 filings | Nov 14, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
9 Schedule 13D and 13G filings on Ardelyx, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Nov 14, 202512:43 PM ET | Janus Henderson Group PLC | 13G/A | 5.70%13.8M shares | −0.60 ppfrom 6.30% | Sep 30, 2025 | SEC |
| Oct 28, 20254:18 PM ET | Millennium Management LLCand 2 others | 13G/A | 3.20%7.67M shares | −1.90 ppfrom 5.10%Below 5% | Sep 30, 2025 | SEC |
| Aug 14, 202511:34 AM ET | Janus Henderson Group PLC | 13G/A | 6.30%15.1M shares | −4.20 ppfrom 10.50% | Jun 30, 2025 | SEC |
| Jul 29, 202511:24 AM ET | Vanguard Group Inc | 13G/A | 6.70%16.0M shares | – | Jun 30, 2025 | SEC |
| Jun 25, 20254:01 PM ET | Millennium Management LLCand 2 others | 13G | 5.10%12.1M shares | New | Jun 17, 2025 | SEC |
| May 14, 202512:14 PM ET | Janus Henderson Group PLC | 13G/A | 10.50%25.0M shares | +0.20 ppfrom 10.30% | Mar 31, 2025 | SEC |
| Feb 14, 202512:57 PM ET | Janus Henderson Group PLC | 13G/A | 10.30%24.4M shares | +0.20 ppfrom 10.10% | Dec 31, 2024 | SEC |
| Feb 5, 20257:46 AM ET | State Street Corp | 13G | 4.90%11.6M shares | NewBelow 5% | Dec 31, 2024 | SEC |
| Dec 6, 202411:36 AM ET | Janus Henderson Group PLC | 13G/A | 10.10%23.9M shares | – | Nov 29, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Ardelyx, Inc. shares.
No Form 144 notices for Ardelyx, Inc. are on file.