As of November 6, 2026, Ardelyx, Inc. is a publicly traded company (Nasdaq: ARDX); its largest reported holder is Rubric Capital Management LP, with 6.56% on Schedule 13G of August 14, 2026, then Millennium (5.7%). The largest insider holding is David M. Mott, a director, with 3,349,655 shares (1.3% of shares outstanding), per Form 4 of June 18, 2026 (Schedule 13G, August 14, 2026).
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Is Ardelyx, Inc. a real, registered company?
- Ardelyx, Inc. files with the SEC under CIK 1437402 (its SEC filings).
- Its shares are listed under the ticker ARDX on Nasdaq (SEC company record).
- Incorporated in Delaware; business address in Fremont, California, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under ARDELYX, INC. in our court records and SEC 8-K records (as of 2026-11-06).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Rubric Capital Management LP (filed 2026-08-14).
Who are Ardelyx, Inc.'s owners and officers?
Ardelyx, Inc.: incorporated in Delaware; business address in Fremont, California; industry Pharmaceutical Preparations (Schedule 13G, 2026-08-14).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G, 2026-08-14 | Rubric Capital Management LP | 6.56% |
| Schedule 13G/A, 2026-08-11 | Millennium Management LLC | 5.7% |
| Schedule 13G/A, 2026-05-15 | Janus Henderson Group PLC | 3.4% |
| Schedule 13G, 2026-05-12 | State Street Corporation | 5.5% |
| Schedule 13G/A, 2026-04-27 | Millennium Management LLC | 7.4% |
| Schedule 13G/A, 2026-03-26 | The Vanguard Group | 0% |
| Schedule 13G/A, 2026-01-30 | The Vanguard Group | 7.81% |
| Schedule 13G, 2026-01-12 | Millennium Management LLC | 5.4% |
| Schedule 13G/A, 2025-11-14 | Janus Henderson Group PLC | 5.7% |
| Schedule 13G/A, 2025-10-28 | Millennium Management LLC | 3.2% |
| Schedule 13G/A, 2025-08-14 | Janus Henderson Group PLC | 6.3% |
| Schedule 13G/A, 2025-07-29 | The Vanguard Group | 6.7% |
Questions about who owns Ardelyx, Inc.
Who owns Ardelyx, Inc.?
On this page, 3 holders' latest ownership filings report 5% or more of Ardelyx, Inc.: Rubric Capital Management LP (6.56%, Schedule 13G, filed 2026-08-14), Millennium Management LLC (5.7%, Schedule 13G/A, filed 2026-08-11) and State Street Corporation (5.5%, Schedule 13G, filed 2026-05-12).
Who are the largest shareholders of Ardelyx, Inc.?
By the share each holder's latest filing reports, the largest holders of Ardelyx, Inc. on this page are Rubric Capital Management LP (6.56%), Millennium Management LLC (5.7%) and State Street Corporation (5.5%).
When did Rubric Capital Management LP buy into Ardelyx, Inc.?
The filings give report dates, not purchase dates. The earliest filing from Rubric Capital Management LP on this page is the Schedule 13G, filed 2026-08-14, reporting 6.56%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 12 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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Which insiders own Ardelyx, Inc. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , a director: 3,349,655 shares (1.3% of shares outstanding) (Form 4, 2026-06-18).
- , the chief executive and president: 1,620,792 shares (0.64% of shares outstanding), 1,619,792 held directly and 1,000 indirectly (Form 4, 2026-08-25).
- , the chief development officer: 525,970 shares (0.21% of shares outstanding), 297,005 held directly and 228,965 indirectly (Form 4, 2024-11-22).
- , a director: 439,998 shares (0.18% of shares outstanding) (Form 4, 2026-06-18).
- , the chief commercial officer: 409,410 shares (0.16% of shares outstanding) (Form 4, 2026-08-25).
Shares outstanding: 251,372,553 as of 2026-10-27, from the company's latest SEC cover page.
How much has Ardelyx, Inc. raised?
No fundraising or offering filing from Ardelyx, Inc. is on file with us.
Keep reading
More on Ardelyx, Inc. and the records around it.
Ardelyx, Inc. elsewhere on the record
- 5%+ stake filings Aug 2026
Companies that share a holder
- Rubric Capital Management LP also filed stake reports on 32 other companies: Enovis Corporation (Aug 2026), MeiraGTx Holdings plc (Aug 2026), Mission Produce, Inc. (Aug 2026)
- Integrated Core Strategies (US) LLC also filed stake reports on 63 other companies: SkinHealth Systems Inc. (Nov 2026), Infinite Eagle Acquisition Corp. (Nov 2026), Longeveron Inc. (Nov 2026)
- JANUS HENDERSON GROUP PLC also filed stake reports on 104 other companies: SURGERY PARTNERS, INC. (Nov 2026), EYEPOINT, INC. (Sep 2026), TELEFLEX INCORPORATED (Sep 2026)
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