Latest Period
Q4 2025
Security Snapshot
ARDELYX, INC. - Common Stock, par value $0.0001 per share (ARDX) Institutional Ownership
CUSIP: 039697107
13F Institutional Holders and Ownership History from Q2 2014 to Q1 2026
Institutions Reporting
227
Shares (Excl. Options)
166,740,299
Price
$5.83
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- Type / Class
- Equity / Common Stock, par value $0.0001 per share
- Symbol
- ARDX on Nasdaq
- Shares outstanding
- 243,837,432
- Price per share
- $6.11
- All holders as of 31 Dec 2025
- Q4 2025
- Total 13F shares
- 166,740,299
- Total reported value
- $972,175,026
- % of total 13F portfolios
- 0%
- Share change
- -3,976,104
- Value change
- -$19,214,806
- Number of holders
- 227
- Price from insider filings
- $6.11
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Quick Takeaways
- ARDX - ARDELYX, INC. - Common Stock, par value $0.0001 per share is tracked under CUSIP 039697107.
- 227 institutions reported positions in Q4 2025.
- 4 significant owners is listed from Schedule 13D/13G reporting.
What Changed
- Holder count moved from 227 to 53 between Q4 2025 and Q1 2026.
- Reported value moved from $972,175,026 to $48,317,044.
Why This Matters
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Source Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 227 institutions filings for Q4 2025.
Investment Quick Answers
What is CUSIP 039697107?
CUSIP 039697107 identifies ARDX - ARDELYX, INC. - Common Stock, par value $0.0001 per share in SEC 13F datasets.
Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.
Next ownership checks
Use the next link that matches the question you still need to answer about this security.
- Latest 13F filings when you want to inspect fresh institutional portfolio moves.
- Latest Schedule 13D/13G reports when you need large-owner changes outside the 13F cycle.
- All institutional ownership pages to compare this security with other holder-history pages.
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 039697107:
Significant Owners of ARDELYX, INC. - Common Stock, par value $0.0001 per share (ARDX) based on Schedule 13D/G filings
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| INTEGRATED CORE STRATEGIES (US) LLC | 7.4% | +40% | $108,083,380 | +$29,483,912 | 18,043,970 | +38% | Millennium Management LLC | 31 Mar 2026 |
| JANUS HENDERSON GROUP PLC | 5.7% | -10% | $76,170,752 | -$6,798,497 | 13,824,093 | -8.2% | JANUS HENDERSON GROUP PLC | 30 Sep 2025 |
| STATE STREET CORP | 4.9% | $63,181,381 | 11,592,914 | STATE STREET CORPORATION | 31 Dec 2024 | |||
| MILLENNIUM MANAGEMENT LLC | 3.2% | -38% | $42,272,648 | -$24,398,060 | 7,671,987 | -37% | Millennium Management LLC | 30 Sep 2025 |
As of 31 Dec 2025, 227 institutional investors reported holding 166,740,299 shares of ARDELYX, INC. - Common Stock, par value $0.0001 per share (ARDX). This represents 68% of the company’s total 243,837,432 outstanding shares.
Top 25 Institutional Shareholders
The largest institutional shareholders of ARDELYX, INC. - Common Stock, par value $0.0001 per share (ARDX) together control 56% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 8.7% | 21,139,105 | +1.5% | 0% | $123,240,982 |
| VANGUARD GROUP INC | 7.8% | 18,979,483 | +3.3% | 0% | $110,650,386 |
| JANUS HENDERSON GROUP PLC | 6% | 14,514,692 | +5% | 0.04% | $84,583,285 |
| STATE STREET CORP | 4.9% | 11,912,339 | +23% | 0% | $69,448,936 |
| MILLENNIUM MANAGEMENT LLC | 4.9% | 11,909,511 | +56% | 0.05% | $69,432,449 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 3.8% | 9,328,744 | 0% | 0.08% | $54,387,000 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.4% | 5,827,618 | +1.2% | 0% | $33,980,836 |
| MARSHALL WACE, LLP | 2.1% | 5,188,639 | -42% | 0.03% | $30,249,766 |
| Nuveen, LLC | 2.1% | 5,164,549 | -0.2% | 0.01% | $30,109,321 |
| GOLDMAN SACHS GROUP INC | 1.3% | 3,064,746 | +19% | 0% | $17,867,469 |
| TWO SIGMA INVESTMENTS, LP | 1.2% | 2,873,969 | +15% | 0.02% | $16,755,239 |
| MORGAN STANLEY | 0.97% | 2,358,806 | -18% | 0% | $13,751,843 |
| Rock Springs Capital Management LP | 0.94% | 2,299,473 | +0.58% | 0.69% | $13,405,928 |
| BANK OF AMERICA CORP /DE/ | 0.91% | 2,208,693 | -17% | 0% | $12,876,677 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.87% | 2,117,293 | -3.5% | 0% | $12,343,818 |
| JANE STREET GROUP, LLC | 0.85% | 2,060,667 | -6.1% | 0.01% | $12,013,689 |
| AQR CAPITAL MANAGEMENT LLC | 0.83% | 2,025,083 | -5.6% | 0.01% | $11,806,235 |
| NORTHERN TRUST CORP | 0.83% | 2,019,285 | -4.7% | 0% | $11,772,430 |
| ORACLE INVESTMENT MANAGEMENT INC | 0.77% | 1,872,624 | +25% | 7.2% | $10,917,398 |
| JONES FINANCIAL COMPANIES LLLP | 0.76% | 1,854,755 | -1% | 0.01% | $10,813,222 |
| RENAISSANCE TECHNOLOGIES LLC | 0.74% | 1,794,793 | +6.2% | 0.02% | $10,463,643 |
| Eversept Partners, LP | 0.7% | 1,715,129 | +20% | 0.56% | $9,999,202 |
| J. Goldman & Co LP | 0.67% | 1,622,736 | +1693% | 0.37% | $9,460,551 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 0.58% | 1,424,878 | +146% | 0% | $8,307,039 |
| D. E. Shaw & Co., Inc. | 0.58% | 1,411,267 | -57% | 0.01% | $8,227,687 |
Institutional Holders of ARDELYX, INC. - Common Stock, par value $0.0001 per share (ARDX) across Reporting Periods
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 8,084,443 | $48,317,044 | -$6,839,789 | $5.99 | 53 |
| 2025 Q4 | 166,740,299 | $972,175,026 | -$19,214,806 | $5.83 | 227 |
| 2025 Q3 | 161,691,530 | $891,018,221 | -$30,479,434 | $5.51 | 220 |
| 2025 Q2 | 167,710,260 | $657,039,970 | +$8,960,616 | $3.92 | 203 |
| 2025 Q1 | 164,576,582 | $808,416,494 | +$58,328,254 | $4.91 | 220 |
| 2024 Q4 | 150,859,849 | $764,834,270 | +$39,500,927 | $5.07 | 211 |
| 2024 Q3 | 141,707,765 | $975,933,629 | -$20,620,523 | $6.89 | 200 |
| 2024 Q2 | 144,224,130 | $1,068,439,534 | +$27,386,203 | $7.41 | 194 |
| 2024 Q1 | 140,660,510 | $1,026,744,623 | +$30,824,013 | $7.30 | 187 |
| 2023 Q4 | 136,969,310 | $849,140,365 | +$78,952,256 | $6.20 | 158 |
| 2023 Q3 | 125,847,784 | $513,505,151 | +$7,178,966 | $4.08 | 150 |
| 2023 Q2 | 125,431,955 | $425,166,678 | +$30,557,318 | $3.39 | 144 |
| 2023 Q1 | 113,675,323 | $544,693,922 | +$165,294,361 | $4.79 | 129 |
| 2022 Q4 | 78,419,304 | $223,207,438 | +$72,727,186 | $2.85 | 98 |
| 2022 Q3 | 66,773,937 | $79,510,458 | +$36,649,057 | $1.19 | 78 |
| 2022 Q2 | 38,015,789 | $22,668,222 | -$3,885,722 | $0.59 | 72 |
| 2022 Q1 | 39,645,840 | $42,412,652 | -$2,239,091 | $1.07 | 85 |
| 2021 Q4 | 41,835,051 | $46,015,167 | -$11,862,592 | $1.10 | 95 |
| 2021 Q3 | 48,724,792 | $64,486,313 | -$260,541,309 | $1.32 | 98 |
| 2021 Q2 | 84,843,798 | $643,129,955 | +$1,702,726 | $7.58 | 120 |
| 2021 Q1 | 84,628,144 | $559,673,700 | +$30,418,660 | $6.62 | 120 |
| 2020 Q4 | 80,265,333 | $519,321,662 | +$11,395,260 | $6.47 | 118 |
| 2020 Q3 | 77,475,843 | $406,751,205 | -$2,248,690 | $5.25 | 107 |
| 2020 Q2 | 77,584,170 | $536,863,818 | +$8,872,855 | $6.92 | 124 |
| 2020 Q1 | 76,585,606 | $435,405,838 | +$6,098,633 | $5.68 | 97 |
| 2019 Q4 | 74,902,472 | $562,054,462 | +$190,640,786 | $7.50 | 99 |
| 2019 Q3 | 48,538,260 | $228,132,563 | +$14,809,114 | $4.70 | 75 |
| 2019 Q2 | 45,635,669 | $122,755,737 | +$472,108 | $2.69 | 68 |
| 2019 Q1 | 46,045,418 | $128,928,009 | -$1,854,970 | $2.80 | 70 |
| 2018 Q4 | 47,034,986 | $84,190,187 | -$5,219,040 | $1.79 | 79 |
| 2018 Q3 | 46,855,283 | $203,766,011 | +$4,634,248 | $4.35 | 83 |
| 2018 Q2 | 45,978,418 | $170,134,619 | +$35,639,609 | $3.70 | 92 |
| 2018 Q1 | 35,214,226 | $177,834,754 | -$2,783,994 | $5.05 | 76 |
| 2017 Q4 | 35,332,779 | $233,188,055 | -$2,143,937 | $6.60 | 77 |
| 2017 Q3 | 36,166,771 | $202,824,651 | -$5,993,195 | $5.60 | 80 |
| 2017 Q2 | 37,274,451 | $190,018,355 | -$32,515,051 | $5.10 | 86 |
| 2017 Q1 | 38,633,288 | $488,989,366 | +$17,406,705 | $12.65 | 79 |
| 2016 Q4 | 38,631,665 | $548,578,881 | -$1,007,303 | $14.20 | 84 |
| 2016 Q3 | 38,571,940 | $499,111,978 | +$119,338,460 | $12.94 | 74 |
| 2016 Q2 | 29,693,264 | $259,217,119 | -$1,192,811 | $8.73 | 63 |
| 2016 Q1 | 29,871,501 | $232,083,000 | +$63,001,460 | $7.77 | 65 |
| 2015 Q4 | 21,376,384 | $387,382,681 | +$1,606,263 | $18.12 | 65 |
| 2015 Q3 | 21,193,642 | $366,184,616 | +$8,942,743 | $17.28 | 54 |
| 2015 Q2 | 20,722,631 | $329,379,904 | +$141,921,247 | $15.97 | 57 |
| 2015 Q1 | 11,799,898 | $154,447,933 | +$9,578,673 | $13.09 | 49 |
| 2014 Q4 | 10,866,742 | $205,269,616 | +$11,041,336 | $18.89 | 50 |
| 2014 Q3 | 10,368,074 | $147,326,000 | +$138,806,934 | $14.21 | 32 |
| 2014 Q2 | 579,155 | $9,477,000 | +$9,115,000 | $15.97 | 5 |