$ARDX

$3.00 +$0.00 (0.0%) Close

$ARDX Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 249.2M shares outstanding

Who owns ARDX?

By type of holder

Institutions 70.8% Insiders 8.0% Everyone else 21.2%

Concentration Top 10 holders own 47.9%

BlackRock, Inc. 9.4% · Millennium Management LLC 5.6%

Institutional ownership

70.8%

+2.8 pts vs last qtr

Institutional holders

249

+7 vs last qtr

Net shares bought

+6.9M

by institutions in Q2 2026

New / sold out

44 / 37

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Rubric Capital Management LP +14.3M
Jupiter Topco LLC NEW +5.3M

Biggest sellers in Q2 2026

Janus Henderson Group PLC SOLD OUT −8.4M
Millennium Management LLC −3.9M

Who is planning to sell?

Notices of proposed sale, last 12 months

$3.87M

27 notices from 13 people

Shares covered

662.4K

0.27% of the company

Arranged in advance

51%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Raab Michael Officer $1.08M
Michael Raab Director 10b5-1 $958K

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2019–FY2025

+273.8%

+24.58% a year

Each share's claim on the business

−73.2%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $143M

over 7 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years46% 3–5 years9% 1–3 years18% Under 1 year27%

Quarterly turnover

21.1%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting ARDX on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	23.5M	9.43%	+2.3M (+11.1%)	≤2021	0.0%
Shares held by quarter Peak holding23.5M (Q2'26) Change over 8 quarters+5.7M Share of the company9.430% BlackRock, Inc.'s full portfolio →
MM Millennium Management LLC	13.9M	5.58%	−3.9M (−22.1%)	2024	0.0%
Shares held by quarter Peak holding17.8M (Q1'26) Change over 8 quarters+9.9M Share of the company5.580% Millennium Management LLC's full portfolio →

BlackRock, Inc.

23.5M

% of company

9.43%

Change vs last qtr

+2.3M (+11.1%)

Held since

≤2021

Millennium Management LLC

13.9M

% of company

5.58%

Change vs last qtr

−3.9M (−22.1%)

Held since

2024

28 more super investors behind a free account

See every manager holding Ardelyx, Inc., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting ARDX on Form N-PORT; together they hold 23.4% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
SS State Street(R) SPDR(R) S&P(R) Biotech ETF SPDR Series Trust	$37.8M	7.4M	2.98%	0.35%	June 30, 2026
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$37.8M	7.4M	2.97%	0.00%	June 30, 2026

State Street(R) SPDR(R) S&P(R) Biotech ETF

SPDR Series Trust

Position value

$37.8M

% of company

2.98%

% of the fund

0.35%

As of

June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$37.8M

% of company

2.97%

% of the fund

0.00%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Ardelyx, Inc. and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
MD Mott David M Insider	12.6M	5.05%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company5.050% Mott David M's insider activity →
RM Raab Michael Insider	1.6M	0.65%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.650% Raab Michael's insider activity →

Mott David M

Insider

12.6M

% of company

5.05%

Change vs last qtr

—

Held since

—

Raab Michael

Insider

1.6M

% of company

0.65%

Change vs last qtr

—

Held since

—

20 more holders behind a free account

See every insider and 5%+ holder of Ardelyx, Inc..

Comments