Ardelyx ARDX Institutional Ownership

NASDAQ ARDX

$3.20 +0.07 (+2.24%)

At close: Oct 22, 2026 · 4:00 PM EDT

Institutions by Trading Activity

246 Institutions

Increased 130 52.8%

Unchanged 31 12.6%

Reduced 85 34.6%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

71.17%

▲+2.52 pp QoQ

Shares Held by Institutions

177.32Mn

of 249.15Mn outstanding

▲+4.58% QoQ

Shares Outstanding

249.15Mn

71.83Mn held outside 13F filers

Institutional Investors

246

filed 13F for Jun 2026

▲+7 vs prior quarter

Net Shares Added (QoQ)

+7.77Mn

accumulated since last quarter

Value of Holdings

$555.00Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Updated Oct 11, 2026

Ardelyx, Inc. (NASDAQ:ARDX) counted 246 institutional investors among its 13F-reported shareholders for the quarter ended June 30, 2026.

These investors held 71.17% of outstanding shares in Q2 2026, up from 68.65% the quarter before.
Total shares held in ARDX rose 4.58% from Q1 2026; the number of holders rose 21.18% from Q2 2025.
Looking at the 246 holders of ARDX individually, 130 added to their positions, 85 reduced their stakes and 31 left their positions unchanged.
Combined, institutional investors held 177.32Mn shares of ARDX as of Q2 2026, up 7.77Mn from the prior quarter and up 14.79Mn from a year earlier.
As of June 30, 2026, the biggest holder of Ardelyx was BlackRock, Inc. with 23.5Mn shares, or 9.43% of shares outstanding.
The largest position increases in ARDX for Q2 2026 were by Rubric Capital Management LP (+14.34Mn shares), BlackRock, Inc. (+2.34Mn shares), Nomura Asset Management International Inc. (+1.38Mn shares), Vanguard Portfolio Management LLC (+1.37Mn shares) and Invesco Ltd. (+1.06Mn shares).
Holders that trimmed the most shares of Ardelyx in Q2 2026 while keeping a position were Millennium Management LLC (-3.94Mn shares), Citadel Advisors LLC (-2.43Mn shares), Freestone Grove Partners LP (-1.63Mn shares), Marshall Wace, LLP (-1.54Mn shares) and J. Goldman & Co LP (-1.42Mn shares).
Business Quant data shows the 10 biggest positions in Ardelyx as of Q2 2026 were held by BlackRock, Inc. (23.5Mn shares), Rubric Capital Management LP (16.2Mn shares), Millennium Management LLC (13.9Mn shares), State Street Corp (13.36Mn shares), Vanguard Capital Management LLC (10.47Mn shares), Nomura Asset Management International Inc. (9.55Mn shares), Vanguard Portfolio Management LLC (8.03Mn shares), Geode Capital Management, LLC (6.4Mn shares), Jupiter Topco LLC (5.3Mn shares) and Two Sigma Investments, LP (5.21Mn shares).

Form 13F Holdings

246 Institutional Holders

Report period 30 Jun, 2026

Total shares held 177.32Mn

Of outstanding 71.17%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	23,504,630	9.43%	▲2,340,498	+11.06%	$119.87Mn
2	Rubric Capital Management LP	0001687509	16,202,700	6.50%	▲14,341,804	+770.69%	$82.63Mn
3	MILLENNIUM MANAGEMENT LLC	0001273087	13,900,773	5.58%	▼3,941,597	-22.09%	$70.89Mn
4	State Street Corp	0000093751	13,356,128	5.36%	▼248,179	-1.82%	$68.12Mn
5	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	10,471,494	4.20%	▲105,982	+1.02%	$53.40Mn
6	NOMURA ASSET MANAGEMENT INTERNATIONAL INC.	0000921739	9,546,732	3.83%	▲1,377,363	+16.86%	$48.69Mn
7	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	8,026,774	3.22%	▲1,365,081	+20.49%	$40.94Mn
8	GEODE CAPITAL MANAGEMENT, LLC	0001214717	6,401,736	2.57%	▲394,281	+6.56%	$32.66Mn
9	Jupiter Topco LLC	0002146052	5,302,311	2.13%	▲5,302,311	0.00%	$27.04Mn
10	TWO SIGMA INVESTMENTS, LP	0001179392	5,209,823	2.09%	▲935,780	+21.89%	$26.57Mn
11	Nuveen, LLC	0001871926	3,997,099	1.60%	▼1,237,584	-23.64%	$20.39Mn
12	Goldman Sachs Group Inc	0000886982	3,685,034	1.48%	▲468,824	+14.58%	$18.79Mn
13	AIGH Capital Management LLC	0001835943	3,200,000	1.28%	▲3,200,000	0.00%	$16.32Mn
14	Morgan Stanley	0000895421	2,389,546	0.96%	▲680,573	+39.82%	$12.19Mn
15	AQR CAPITAL MANAGEMENT LLC	0001167557	2,316,220	0.93%	▼123,230	-5.05%	$11.81Mn
16	Northern Trust Corp	0000073124	2,280,143	0.92%	▲209,096	+10.10%	$11.63Mn
17	Rock Springs Capital Management LP	0001595725	2,241,769	0.90%	▼57,704	-2.51%	$11.43Mn
18	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0000884546	2,211,760	0.89%	▲97,662	+4.62%	$11.28Mn
19	Bank Of America Corp /De/	0000070858	2,163,500	0.87%	▼173,494	-7.42%	$11.03Mn
20	Qube Research & Technologies Ltd	0001729829	2,090,675	0.84%	▼344,873	-14.16%	$10.66Mn

Showing 1 to 20 of 246 holders