ARDELYX INC (ARDX) Institutional Shareholders
ARDELYX INC (ARDX) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $996.91M in ARDX holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of ARDX tracked by InsiderSet, reporting ownership valued at approximately $126.77M in its March 31, 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 $104.76M, representing an estimated loss of -17.36% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 61% of the total disclosed ARDX value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Millennium Management Llc, State Street Corp, 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
234
Total Reported Value
$996.91M
Largest Holder
Blackrock, Inc.
Largest Position
$126.77M
Insider Transactions (90d)
34
Latest Filing Quarter
Q2 2026
New Institutional Positions
106
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% | 21,164,132 | $126,773,151 | $104,762,453 | -$22,010,698 | -17.36% | |
| Millennium Management Llc | 0.08% | 17,842,370 | $106,875,796 | $88,319,732 | -$18,556,065 | -17.36% | |
| State Street Corp | 0.00% | 13,604,307 | $81,489,799 | $67,341,320 | -$14,148,479 | -17.36% | |
| Vanguard Capital Management Llc | 0.00% | 10,365,512 | $62,089,417 | $51,309,284 | -$10,780,133 | -17.36% | |
| Janus Henderson Group Plc | 0.02% | 8,371,234 | $50,143,692 | $41,437,608 | -$8,706,084 | -17.36% | |
| Nomura Asset Management International Inc. | 0.08% | 8,169,369 | $48,935,000 | $40,438,377 | -$8,496,623 | -17.36% | |
| Vanguard Portfolio Management Llc | 0.00% | 6,661,693 | $39,903,541 | $32,975,380 | -$6,928,161 | -17.36% | |
| Geode Capital Management, Llc | 0.00% | 6,007,455 | $35,991,723 | $29,736,902 | -$6,254,821 | -17.38% | |
| Nuveen, Llc | 0.01% | 5,234,683 | $31,355,751 | $25,911,681 | -$5,444,070 | -17.36% | |
| Two Sigma Investments, Lp | 0.02% | 4,274,043 | $25,601,518 | $21,156,513 | -$4,445,005 | -17.36% | |
| Citadel Advisors Llc | 0.01% | 3,464,774 | $20,753,997 | $17,150,631 | -$3,603,366 | -17.36% | |
| Goldman Sachs Group Inc | 0.00% | 3,216,210 | $19,265,098 | $15,920,240 | -$3,344,859 | -17.36% | |
| J. Goldman & Co Lp | 0.83% | 3,000,513 | $17,973,073 | $14,852,539 | -$3,120,534 | -17.36% | |
| Point72 Asset Management, L.P. | 0.03% | 2,984,261 | $17,875,723 | $14,772,092 | -$3,103,631 | -17.36% | |
| Aqr Capital Management Llc | 0.01% | 2,439,450 | $14,612,307 | $12,075,278 | -$2,537,030 | -17.36% | |
| Qube Research & Technologies Ltd | 0.02% | 2,435,548 | $14,588,933 | $12,055,963 | -$2,532,970 | -17.36% | |
| Bank Of America Corp | 0.00% | 2,336,994 | $13,998,594 | $11,568,120 | -$2,430,474 | -17.36% | |
| Rock Springs Capital Management Lp | 0.81% | 2,299,473 | $13,773,843 | $11,382,391 | -$2,391,452 | -17.36% | |
| Eversept Partners, Lp | 0.88% | 2,229,446 | $13,354,382 | $11,035,758 | -$2,318,624 | -17.36% | |
| Charles Schwab Investment Management Inc | 0.00% | 2,114,098 | $12,663,447 | $10,464,785 | -$2,198,662 | -17.36% | |
| Northern Trust Corp | 0.00% | 2,071,047 | $12,405,571 | $10,251,683 | -$2,153,888 | -17.36% | |
| Freestone Grove Partners Lp | 0.08% | 1,879,783 | $11,259,900 | $9,304,926 | -$1,954,974 | -17.36% | |
| Rubric Capital Management Lp | 0.14% | 1,860,896 | $11,146,767 | $9,211,435 | -$1,935,332 | -17.36% | |
| Morgan Stanley | 0.00% | 1,708,973 | $10,236,755 | $8,459,416 | -$1,777,339 | -17.36% | |
| Jones Financial Companies Lllp | 0.00% | 1,858,891 | $10,186,723 | $9,201,510 | -$985,213 | -9.67% | |
| Vanguard Fiduciary Trust Co | 0.00% | 1,678,111 | $10,051,885 | $8,306,649 | -$1,745,236 | -17.36% | |
| Marshall Wace, Llp | 0.01% | 1,600,857 | $9,589,136 | $7,924,242 | -$1,664,894 | -17.36% | |
| First Trust Advisors Lp | 0.01% | 1,498,798 | $8,977,800 | $7,419,050 | -$1,558,750 | -17.36% | |
| Renaissance Technologies LLC | Jim Simons | 0.01% | 1,272,441 | $7,621,922 | $6,298,583 | -$1,323,339 | -17.36% |
| Jane Street Group, Llc | 0.01% | 1,179,379 | $7,064,480 | $5,837,926 | -$1,226,554 | -17.36% | |
| Hennion & Walsh Asset Management, Inc. | 0.18% | 1,211,690 | $6,179,619 | $5,997,866 | -$181,754 | -2.94% | |
| Trexquant Investment Lp | 0.03% | 804,734 | $4,820,357 | $3,983,433 | -$836,924 | -17.36% | |
| Redmile Group, Llc | 0.29% | 733,350 | $4,392,767 | $3,630,083 | -$762,685 | -17.36% | |
| Deutsche Bank Ag\ | 0.00% | 708,589 | $4,244,448 | $3,507,516 | -$736,932 | -17.36% | |
| Susquehanna International Group, Llp | 0.01% | 701,968 | $4,204,788 | $3,474,742 | -$730,046 | -17.36% | |
| Bank Of New York Mellon Corp | 0.00% | 700,783 | $4,197,692 | $3,468,876 | -$728,816 | -17.36% | |
| Bnp Paribas Financial Markets | 0.00% | 698,744 | $4,185,477 | $3,458,783 | -$726,694 | -17.36% | |
| Squarepoint Ops Llc | 0.01% | 697,284 | $4,176,731 | $3,451,556 | -$725,175 | -17.36% | |
| Ubs Group Ag | 0.00% | 688,649 | $4,125,007 | $3,408,813 | -$716,194 | -17.36% | |
| Sector Gamma As | 0.73% | 516,131 | $3,091,625 | $2,554,848 | -$536,777 | -17.36% | |
| Raymond James Financial Inc | 0.00% | 486,712 | $2,915,405 | $2,409,224 | -$506,181 | -17.36% | |
| Swiss National Bank | 0.00% | 480,800 | $2,879,992 | $2,379,960 | -$500,032 | -17.36% | |
| Ishara Investments Lp | 2.73% | 451,000 | $2,701,490 | $2,232,450 | -$469,040 | -17.36% | |
| Monimus Capital Management, Lp | 0.74% | 443,775 | $2,658,212 | $2,196,686 | -$461,526 | -17.36% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.00% | 440,674 | $2,639,638 | $2,181,336 | -$458,302 | -17.36% | |
| Rafferty Asset Management, Llc | 0.01% | 407,854 | $2,443,045 | $2,018,877 | -$424,168 | -17.36% | |
| Schroder Investment Management Group | 0.00% | 419,768 | $2,329,713 | $2,077,852 | -$251,861 | -10.81% | |
| Universal- Beteiligungs- Und Servicegesellschaft Mbh | 0.00% | 357,180 | $2,139,509 | $1,768,041 | -$371,468 | -17.36% | |
| Clay Northam Wealth Management, Llc | 1.12% | 331,965 | $1,988,470 | $1,643,227 | -$345,243 | -17.36% | |
| D. E. Shaw & Co., Inc. | 0.00% | 313,961 | $1,880,626 | $1,554,107 | -$326,519 | -17.36% |
Frequently asked questions about ARDX
Who owns the most ARDX stock?
The largest holders of ARDX are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for ARDELYX INC (ARDX).
Is ARDX widely held by superinvestors?
Many widely followed stocks like ARDX appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly ARDX is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.