ARDELYX INC (ARDX) Stock Institutional Trading Activity


ARDELYX INC (ARDX) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Renaissance Technologies LLC. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q4 2025Renaissance Technologies LLCBuy104,7001,794,793$10,463,643
Q3 2025Renaissance Technologies LLCBuy388,9001,690,093$9,312,412
Q2 2025Renaissance Technologies LLCSell-50,4001,301,193$5,100,677
Q1 2025Renaissance Technologies LLCBuy166,3201,351,593$6,636,322
Q3 2023Renaissance Technologies LLCSell-661,7201,185,273$4,836
Q2 2023Renaissance Technologies LLCSell-1,290,7001,846,993$6,261
Q1 2023Renaissance Technologies LLCBuy2,688,0003,137,693$15,030
Q4 2022Renaissance Technologies LLCBuy195,444449,693$1,282
Q3 2022Renaissance Technologies LLCBuy45,256254,249$303
Q2 2022Renaissance Technologies LLCSell-1,086,600208,993$123
Q1 2022Renaissance Technologies LLCSell-744,8281,295,593$1,386
Q4 2021Renaissance Technologies LLCBuy1,541,1482,040,421$2,244
Q1 2021Renaissance Technologies LLCSell-263,594499,273$3,305
Q4 2020Renaissance Technologies LLCSell-304,947762,867$4,936
Q3 2020Renaissance Technologies LLCSell-621,5201,067,814$5,606
Q2 2020Renaissance Technologies LLCSell-298,0001,689,334$11,690
Q1 2020Renaissance Technologies LLCSell-475,9001,987,334$11,298
Q4 2019Renaissance Technologies LLCBuy31,1002,463,234$18,487
Q3 2019Renaissance Technologies LLCBuy332,0642,432,134$11,431
Q2 2019Renaissance Technologies LLCBuy118,4682,100,070$5,649
Q1 2019Renaissance Technologies LLCSell-217,1191,981,602$5,548
Q4 2018Renaissance Technologies LLCBuy1,017,7212,198,721$3,936
Q3 2018Renaissance Technologies LLCBuy789,2001,181,000$5,137
Q1 2018Renaissance Technologies LLCBuy135,800391,800$1,979
Q4 2017Renaissance Technologies LLCBuy160,600256,000$1,690
Q3 2017Renaissance Technologies LLCBuy29,10095,400$534
Q4 2016Renaissance Technologies LLCBuy19,30066,300$941
Q3 2016Renaissance Technologies LLCBuy34,40047,000$608
Q2 2015Renaissance Technologies LLCSell-39,00012,600$201
Q1 2015Renaissance Technologies LLCBuy51,60051,600$675

Frequently asked questions about ARDX activity

  • Which institutional owners are buying ARDX?

    Institutional owners buying ARDX include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in ARDX activity?

    "Buy" means an investor increased their reported position in ARDX compared to the prior reporting period. This reflects growing exposure to ARDELYX INC (ARDX) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in ARDX increasing?

    Institutional interest in ARDX can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.