David M. Knott Jr’s Ardelyx ARDX Stock Holding History

David M. Knott Jr’s Portfolio ARDX Stock Details ARDX Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$1.34M	Buy	263,168 +56,168	+27%	+$343K	0.71%	27
2026 Q1	$1.24M	Buy	+207,000	New	+$1.37M	0.74%	28
2025 Q2	–	Sell	-493,807	Closed	-$2.42M	–	86
2025 Q1	$2.42M	Sell	493,807 -118,463	-19%	-$636K	1.14%	16
2024 Q4	$3.1M	Sell	612,270 -70,597	-10%	-$390K	1.12%	17
2024 Q3	$4.71M	Sell	682,867 -90,000	-12%	-$531K	1.65%	14
2024 Q2	$5.73M	Sell	772,867 -52,133	-6%	-$367K	2.29%	9
2024 Q1	$6.02M	Sell	825,000 -555,000	-40%	-$4.75M	2.13%	12
2023 Q4	$8.56M	Sell	1,380,000 -120,000	-8%	-$538K	3.27%	7
2023 Q3	$6.12M	Hold	1,500,000	–	–	2.34%	8
2023 Q2	$5.08M	Hold	1,500,000	–	–	2.02%	12
2023 Q1	$7.18M	Hold	1,500,000	–	–	2.82%	8
2022 Q4	$4.28M	Buy	1,500,000 +850,000	+131%	+$1.44M	1.62%	16
2022 Q3	$774K	Buy	+650,000	New	+$618K	0.33%	53

Other funds holding ARDX

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

RCMNY

Rubric Capital Management (New York) New York $10.9B AUM 70.31% 1-Year Est. Return

Millennium Management New York $276B AUM 44.8% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

NAMI

Nomura Asset Management International Philadelphia, Pennsylvania $66.6B AUM

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Jupiter Topco New York $245B AUM

Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return

David M. Knott Jr's ARDX Position: Q2 2026 in Review

David M. Knott Jr increased its Ardelyx (ARDX) stake by 27% in Q2 2026, buying an estimated $343K and bringing the position to 263,168 shares worth $1.34M. The position accounts for 0.71% of the portfolio, ranked #27.

David M. Knott Jr first reported a position in ARDX in Q3 2022 and has held it in 13 quarters since. The position peaked at $8.56M in Q4 2023. 249 funds tracked by Wall St. Rank hold ARDX as of Q2 2026.

David M. Knott Jr held 263,168 shares of Ardelyx worth $1.34M as of Q2 2026.
David M. Knott Jr bought 56,168 Ardelyx shares in Q2 2026, an estimated $343K.
Ardelyx made up 0.71% of David M. Knott Jr's portfolio in Q2 2026, its #27 holding.
David M. Knott Jr first reported a position in Ardelyx in Q3 2022 and has held it in 13 quarters since.
David M. Knott Jr's Ardelyx position peaked at $8.56M in Q4 2023.
249 funds tracked by Wall St. Rank held Ardelyx as of Q2 2026.

Based on David M. Knott Jr's 13F filing for Q2 2026, filed 12 Aug 2026.