Question 1

Does Citadel Advisors own ARDX stock?

Accepted Answer

Yes. As of its Q2 2026 13F, Citadel Advisors holds 1,030,174 shares of ARDX (Ardelyx), worth $5.3M.

Question 2

How many shares of ARDX does Citadel Advisors own?

Accepted Answer

As of its Q2 2026 13F, Citadel Advisors holds 1,030,174 shares of ARDX (Ardelyx).

Question 3

What is Citadel Advisors' ARDX position worth?

Accepted Answer

As of its Q2 2026 13F, Citadel Advisors' ARDX position is worth $5.3M.

Question 4

Is Citadel Advisors buying or selling ARDX?

Accepted Answer

In Q2 2026, Citadel Advisors reduced its ARDX position by 2,434,600 shares (-70.3%).

Question 5

When did Citadel Advisors first buy ARDX?

Accepted Answer

Citadel Advisors already held ARDX in its Q4 2018 13F, the earliest on record, and has listed it in 28 quarterly 13F filings.

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q2 Latest	Decreased	1M	-70.3%	$5.3M	0.0%	$5.10	0
2026-Q1	Increased	3.5M	+161.0%	$20.8M	0.0%	$5.99	46
2025-Q4	Decreased	1.3M	-13.2%	$7.7M	0.0%	$5.83	0
2025-Q3	Decreased	1.5M	-30.9%	$8.4M	0.0%	$5.51	0
2025-Q2	Decreased	2.2M	-30.7%	$8.7M	0.0%	$3.92	0
2025-Q1	Increased	3.2M	+28.1%	$15.7M	0.0%	$4.91	35
2024-Q4	Increased	2.5M	+12.8%	$12.6M	0.0%	$5.07	31
2024-Q3	Increased	2.2M	+747.5%	$15.2M	0.0%	$6.65	45