Ardelyx Ownership | Who Owns Ardelyx?

Overview Forecast RevenueFinancials Chart Transcripts

Ardelyx Ownership Summary

Ardelyx is owned by 12.47% institutional investors, 2.77% insiders, and 84.76% retail investors. Janus henderson group is the largest institutional shareholder, holding 10.34% of ARDX shares. Macquarie Small Cap Core I is the top mutual fund, with 3.57% of its assets in Ardelyx shares.

ARDX Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Ardelyx	12.47%	2.77%	84.76%
Sector	Healthcare Stocks	42.50%	10.81%	46.69%
Industry	Biotech Stocks	45.24%	10.75%	44.01%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Janus henderson group	24.39M	10.34%	$123.59M
Blackrock funding, inc. /de	20.82M	8.68%	$114.74M
Vanguard group	18.37M	7.66%	$101.21M
Blackrock	17.55M	7.53%	$130.06M
Macquarie group	10.46M	4.36%	$57.61M
State street	9.72M	4.05%	$53.55M
Marshall wace, llp	8.94M	3.73%	$49.28M
Millennium management	6.47M	2.71%	$31.74M
Geode capital management	5.76M	2.40%	$31.72M
Nuveen	5.17M	2.16%	$28.51M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Lion point capital, lp	162.75K	5.09%	$896.75K
Oracle investment management	1.43M	3.85%	$5.61M
Clay northam wealth management	323.46K	1.02%	$1.78M
Stonepine capital management	200.00K	0.90%	$1.10M
Rock springs capital management lp	2.29M	0.74%	$12.60M
Monimus capital management, lp	202.31K	0.69%	$1.11M
Diadema partners lp	400.00K	0.56%	$2.20M
Eversept partners, lp	1.43M	0.54%	$7.88M
Persistent asset partners	92.05K	0.35%	$507.17K
Aigh capital management	198.50K	0.31%	$1.09M

Top Buyers

Holder	Shares	% Assets	Change
Millennium management	6.47M	0.02%	3.50M
Janus henderson group	24.39M	0.06%	2.86M
Vanguard group	18.37M	0.00%	2.34M
Nuveen	5.17M	0.01%	1.69M
D. e. shaw	1.47M	0.01%	1.45M

Top Sellers

Holder	Shares	% Assets	Change
Eventide asset management	-	-	-5.60M
Marshall wace, llp	8.94M	0.05%	-2.31M
Rubric capital management lp	-	-	-1.71M
Redmile group	-	-	-1.58M
Two seas capital lp	-	-	-1.54M

New Positions

Holder	Shares	% Assets	Change	Value
Eversept partners, lp	1.43M	0.54%	1.43M	$7.88M
Arrowstreet capital, limited partnership	579.02K	0.00%	579.02K	$3.19M
Diadema partners lp	400.00K	0.56%	400.00K	$2.20M
Aigh capital management	198.50K	0.31%	198.50K	$1.09M
Srs capital advisors	167.30K	0.01%	167.30K	$921.82K

Sold Out

Holder	Change
Skopos labs	-1.00
Zrc wealth management	-15.00
Ifp advisors	-26.00
Glenmede investment management, lp	-39.00
Nelson, van denburg & campbell wealth management group	-44.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Sep 30, 2025	77	-63.51%	29,911,807	-82.16%	12	0.26%	43	-61.26%	21	-65.00%
Jun 30, 2025	207	-9.21%	167,433,845	2.00%	69	1.47%	109	-14.17%	59	1.72%
Mar 31, 2025	9	-96.02%	12,591,977	-91.65%	5	0.13%	8	-93.55%	-	-100.00%
Dec 31, 2024	223	5.19%	150,242,808	6.36%	63	1.78%	121	21.00%	60	-11.76%
Sep 30, 2024	210	2.94%	140,893,765	-2.01%	59	1.57%	98	-9.26%	68	13.33%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Macquarie Small Cap Core I	8.61M	3.57%	-646.97K
Delaware Small Cap Core I	7.32M	3.09%	1.68M
Vanguard US Total Market Shares ETF	7.03M	2.95%	-
Vanguard Total Stock Mkt Idx Inv	7.10M	2.95%	-157.53K
iShares Russell 2000 ETF	5.70M	2.36%	-
SPDR® S&P Biotech ETF	4.38M	1.82%	9.78K
Janus Henderson Global Life Sciences	3.24M	1.35%	-909.95K
Janus Henderson Global Life Sciences D	3.24M	1.34%	-126.95K
Eventide Healthcare & Life Sciences I	3.02M	1.27%	-1.82M
Janus Global Life Science AUSD	2.69M	1.11%	-671.50K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Nov 21, 2025	GRAMMER ELIZABETH A	See Remarks	Sell	$33.19K
Nov 21, 2025	RAAB MICHAEL	President & CEO	Sell	$259.61K
Nov 21, 2025	Kelliher Mike	See Remarks	Sell	$30.79K
Nov 21, 2025	Williams Laura A	Chief Patient Officer	Sell	$35.58K
Nov 21, 2025	Foster Eric Duane	Chief Commercial Officer	Sell	$32.19K

Insider Transactions Trends

Date	Buy	Sell
2025 Q3	-	8
2025 Q2	4	8
2025 Q1	2	7
2024 Q4	2	14
2024 Q3	-	18

ARDX Ownership FAQ

Who Owns Ardelyx?

Ardelyx shareholders are primarily institutional investors at 12.47%, followed by 2.77% insiders and 84.76% retail investors. The average institutional ownership in Ardelyx's industry, Biotech Stocks , is 45.24%, which Ardelyx falls below.

Who owns the most shares of Ardelyx?

Ardelyx’s largest shareholders are Janus henderson group (24.39M shares, 10.34%), Blackrock funding, inc. /de (20.82M shares, 8.68%), and Vanguard group (18.37M shares, 7.66%). Together, they hold 26.67% of Ardelyx’s total shares outstanding.

Does Blackrock own Ardelyx?

Yes, BlackRock owns 7.53% of Ardelyx, totaling 17.55M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 130.06M$. In the last quarter, BlackRock increased its holdings by 456.52K shares, a 2.67% change.

Who is Ardelyx’s biggest shareholder by percentage of total assets invested?

Lion point capital, lp is Ardelyx’s biggest shareholder by percentage of total assets invested, with 5.09% of its assets in 162.75K Ardelyx shares, valued at 896.75K$.

Who is the top mutual fund holder of Ardelyx shares?

Macquarie Small Cap Core I is the top mutual fund holder of Ardelyx shares, with 3.57% of its total shares outstanding invested in 8.61M Ardelyx shares.

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