Does Citadel Advisors own ARDX stock?

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

How many shares of ARDX does Citadel Advisors own?

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

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

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

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

31 quarters

Position history for Citadel Advisors LLC's holdings in Ardelyx, Inc.

Current Value

$5.3M

Current Shares

Total Value Change

+$5.1M

Total Shares Change

+970,964

Quarter-by-Quarter History

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
2024-Q2	Decreased	260,632	-42.2%	$1.9M	0.0%	$7.41	0
2024-Q1	Increased	450,705	+171.0%	$3.3M	0.0%	$7.30	43
2023-Q4	Decreased	166,303	-22.7%	$1M	0.0%	$6.20	0
2023-Q3	Increased	215,190	+216.6%	$877,975	0.0%	$4.08	40
2023-Q2	Decreased	67,967	-72.9%	$230,408	0.0%	$3.33	0
2023-Q1	Increased	250,486	+2626.8%	$1.2M	0.0%	$4.59	41
2022-Q4	Decreased	9,186	-92.7%	$26,180	0.0%	$2.85	0
2022-Q3	Decreased	125,531	-71.3%	$150,000	0.0%	$1.13	0
2022-Q2	New	436,566	-	$258,000	0.0%	$0.57	32
2022-Q1	Exited	0	-100.0%	$0	0.0%	$1.08	0
2021-Q4	Decreased	179,343	-15.9%	$197,000	0.0%	$1.13	0
2021-Q3	Increased	213,353	+72.4%	$282,000	0.0%	$1.28	35
2021-Q2	Increased	123,773	+126.5%	$938,000	0.0%	$7.83	40
2021-Q1	Decreased	54,644	-26.8%	$362,000	0.0%	$6.20	0
2020-Q4	Increased	74,626	+49.1%	$483,000	0.0%	$6.73	33
2020-Q3	New	50,042	-	$262,000	0.0%	$5.29	32
2020-Q2	Exited	0	-100.0%	$0	0.0%	$6.58	0
2020-Q1	Increased	198,674	+45.0%	$1.1M	0.0%	$5.77	34
2019-Q4	Increased	137,057	+590.8%	$1M	0.0%	$7.43	40
2019-Q3	Increased	19,840	+43.0%	$93,000	0.0%	$4.84	20
2019-Q2	New	13,873	-	$37,000	0.0%	$2.69	31
2019-Q1	Exited	0	-100.0%	$0	0.0%	$2.80	0
2018-Q4	First report	59,210	-	$106,000	0.0%	$1.76	0