ARDX Institutional Ownership & Shareholders
ARDELYX INC (ARDX) is currently held by 235 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $905.91M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of ARDX tracked by InsiderSet, reporting ownership valued at approximately $119.87M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $71.22M, representing an estimated loss of -40.59% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 66% of the total disclosed ARDX value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Rubric Capital Management Lp, Millennium Management Llc, and several other long-term asset managers with concentrated positions in ARDELYX INC (ARDX).
This page ranks the largest institutional ARDX shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
235
Total Reported Value
$905.91M
Largest Holder
Blackrock, Inc.
Largest Position
$119.87M
Insider Transactions (90d)
21
Latest Filing Quarter
Q2 2026
New Institutional Positions
52
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 23,504,630 | $119,873,615 | $71,219,029 | -$48,654,586 | -40.59% | |
| Rubric Capital Management Lp | 0.76% | 16,202,700 | $82,633,770 | $49,094,181 | -$33,539,589 | -40.59% | |
| Millennium Management Llc | 0.05% | 13,900,773 | $70,893,942 | $42,119,342 | -$28,774,600 | -40.59% | |
| State Street Corp | 0.00% | 13,356,128 | $68,116,253 | $40,469,068 | -$27,647,185 | -40.59% | |
| Vanguard Capital Management Llc | 0.00% | 10,471,494 | $53,404,619 | $31,728,627 | -$21,675,992 | -40.59% | |
| Janus Henderson Group Plc | 0.02% | 8,371,234 | $50,143,692 | $25,364,839 | -$24,778,853 | -49.42% | |
| Nomura Asset Management International Inc. | 0.07% | 9,546,732 | $48,688,000 | $28,926,598 | -$19,761,402 | -40.59% | |
| Vanguard Portfolio Management Llc | 0.00% | 8,026,774 | $40,936,547 | $24,321,125 | -$16,615,422 | -40.59% | |
| Geode Capital Management, Llc | 0.00% | 6,401,736 | $32,655,404 | $19,397,260 | -$13,258,144 | -40.60% | |
| Two Sigma Investments, Lp | 0.02% | 5,209,823 | $26,570,097 | $15,785,764 | -$10,784,333 | -40.59% | |
| Nuveen, Llc | 0.00% | 3,997,099 | $20,385,205 | $12,111,210 | -$8,273,995 | -40.59% | |
| Goldman Sachs Group Inc | 0.00% | 3,685,034 | $18,793,673 | $11,165,653 | -$7,628,020 | -40.59% | |
| Morgan Stanley | 0.00% | 2,389,546 | $12,186,687 | $7,240,324 | -$4,946,363 | -40.59% | |
| Aqr Capital Management Llc | 0.00% | 2,316,220 | $11,812,722 | $7,018,147 | -$4,794,575 | -40.59% | |
| Northern Trust Corp | 0.00% | 2,280,143 | $11,628,729 | $6,908,833 | -$4,719,896 | -40.59% | |
| Rock Springs Capital Management Lp | 0.56% | 2,241,769 | $11,433,022 | $6,792,560 | -$4,640,462 | -40.59% | |
| Charles Schwab Investment Management Inc | 0.00% | 2,211,760 | $11,279,976 | $6,701,633 | -$4,578,343 | -40.59% | |
| Bank Of America Corp | 0.00% | 2,163,500 | $11,033,851 | $6,555,405 | -$4,478,446 | -40.59% | |
| Qube Research & Technologies Ltd | 0.01% | 2,090,675 | $10,662,443 | $6,334,745 | -$4,327,698 | -40.59% | |
| Jones Financial Companies Lllp | 0.00% | 1,765,932 | $9,800,923 | $5,350,774 | -$4,450,149 | -45.41% | |
| Vanguard Fiduciary Trust Co | 0.00% | 1,754,819 | $8,949,577 | $5,317,102 | -$3,632,475 | -40.59% | |
| Eversept Partners, Lp | 0.47% | 1,678,345 | $8,559,560 | $5,085,385 | -$3,474,175 | -40.59% | |
| J. Goldman & Co Lp | 0.28% | 1,579,828 | $8,057,123 | $4,786,879 | -$3,270,244 | -40.59% | |
| Invesco Ltd. | 0.00% | 1,368,868 | $6,981,226 | $4,147,670 | -$2,833,556 | -40.59% | |
| First Trust Advisors Lp | 0.00% | 1,301,624 | $6,638,282 | $3,943,921 | -$2,694,361 | -40.59% | |
| Schroder Investment Management Group | 0.00% | 1,161,238 | $6,073,275 | $3,518,551 | -$2,554,724 | -42.07% | |
| Citadel Advisors Llc | 0.00% | 1,030,174 | $5,253,887 | $3,121,427 | -$2,132,460 | -40.59% | |
| Susquehanna International Group, Llp | 0.00% | 916,037 | $4,671,789 | $2,775,592 | -$1,896,197 | -40.59% | |
| Hennion & Walsh Asset Management, Inc. | 0.13% | 1,338,849 | $4,578,864 | $4,056,712 | -$522,152 | -11.40% | |
| Renaissance Technologies LLC | Jim Simons | 0.01% | 892,593 | $4,552,224 | $2,704,557 | -$1,847,667 | -40.59% |
| Panagora Asset Management Inc | 0.01% | 890,944 | $4,543,814 | $2,699,560 | -$1,844,254 | -40.59% | |
| Bnp Paribas Financial Markets | 0.00% | 810,322 | $4,132,642 | $2,455,276 | -$1,677,366 | -40.59% | |
| Deutsche Bank Ag\ | 0.00% | 770,910 | $3,931,642 | $2,335,857 | -$1,595,785 | -40.59% | |
| Exoduspoint Capital Management, Lp | 0.04% | 752,923 | $3,839,907 | $2,281,357 | -$1,558,550 | -40.59% | |
| Bank Of New York Mellon Corp | 0.00% | 749,676 | $3,823,350 | $2,271,518 | -$1,551,832 | -40.59% | |
| Squarepoint Ops Llc | 0.01% | 715,262 | $3,647,836 | $2,167,244 | -$1,480,592 | -40.59% | |
| Sector Gamma As | 0.76% | 686,844 | $3,502,904 | $2,081,137 | -$1,421,767 | -40.59% | |
| Trexquant Investment Lp | 0.02% | 660,586 | $3,368,989 | $2,001,576 | -$1,367,413 | -40.59% | |
| Redmile Group, Llc | 0.22% | 641,750 | $3,272,925 | $1,944,502 | -$1,328,423 | -40.59% | |
| Mackenzie Financial Corp | 0.00% | 893,643 | $3,056,259 | $2,707,738 | -$348,521 | -11.40% | |
| Raymond James Financial Inc | 0.00% | 562,672 | $2,869,627 | $1,704,896 | -$1,164,731 | -40.59% | |
| Ubs Group Ag | 0.00% | 551,721 | $2,813,778 | $1,671,715 | -$1,142,063 | -40.59% | |
| Jump Financial, Llc | 0.02% | 536,981 | $2,738,604 | $1,627,052 | -$1,111,552 | -40.59% | |
| Krensavage Asset Management, Llc | 1.04% | 534,523 | $2,726,000 | $1,619,605 | -$1,106,395 | -40.59% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.00% | 440,674 | $2,639,638 | $1,335,242 | -$1,304,396 | -49.42% | |
| Swiss National Bank | 0.00% | 467,600 | $2,384,760 | $1,416,828 | -$967,932 | -40.59% | |
| Universal- Beteiligungs- Und Servicegesellschaft Mbh | 0.00% | 411,386 | $2,098,069 | $1,246,500 | -$851,569 | -40.59% | |
| Price T Rowe Associates Inc | 0.00% | 359,635 | $1,835,000 | $1,089,694 | -$745,306 | -40.62% | |
| Citigroup Inc | 0.00% | 311,021 | $1,586,207 | $942,394 | -$643,813 | -40.59% | |
| Alliancebernstein L.P. | 0.00% | 264,770 | $1,585,972 | $802,253 | -$783,719 | -49.42% |
Frequently asked questions about ARDX
Who are the largest institutional holders of ARDX?
The largest institutional holders of ARDX reported in the latest SEC Form 13F filings include Blackrock, Inc., Rubric Capital Management Lp, Millennium Management Llc, State Street Corp, and Vanguard Capital Management Llc. InsiderSet ranks institutional holders by their latest reported ARDX position.
What is ARDX institutional ownership?
This page tracks ARDX positions reported by institutional investment managers through SEC Form 13F. ARDELYX INC (ARDX) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own ARDX?
InsiderSet currently tracks 235 institutional managers reporting ARDX holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of ARDX shareholders.
How much ARDX stock do institutions own?
Institutional investment managers disclosed approximately $905.91M in ARDX holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was ARDX institutional ownership last updated?
The latest ARDX institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional ARDX holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its ARDX position after the reporting date.
Are institutions buying or selling ARDX?
Institutional buying and selling can be analyzed by comparing ARDX positions across consecutive 13F reporting periods. InsiderSet's ARDX Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View ARDX ownership changes.
How has ARDX institutional ownership changed over time?
InsiderSet tracks ARDX institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.