Ardelyx
ARDX
206 hedge funds and large institutions have $657M invested in Ardelyx in 2025 Q2 according to their latest regulatory filings, with 30 funds opening new positions, 79 increasing their positions, 63 reducing their positions, and 43 closing their positions.
25% more repeat investments, than reductions
Existing positions increased: 79 | Existing positions reduced: 63
22% more call options, than puts
Call options by funds: $8.49M | Put options by funds: $6.95M
1.05% more ownership
Funds ownership: 69.07% → 70.12% (+1.1%)
0% more funds holding in top 10
Funds holding in top 10: 2 → 2 (0)
7% less funds holding
Funds holding: 221 → 206 (-15)
19% less capital invested
Capital invested by funds: $809M → $657M (-$151M)
30% less first-time investments, than exits
New positions opened: 30 | Existing positions closed: 43
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Millennium Management
New York
|
+$21.4M |
| 2 |
Marshall Wace
London,
United Kingdom
|
+$11.8M |
| 3 |
BlackRock
New York
|
+$11.5M |
| 4 |
Bank of America
Charlotte,
North Carolina
|
+$10.7M |
| 5 |
Goldman Sachs
New York
|
+$6.7M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Janus Henderson Group
London,
|
-$40.9M |
| 2 |
Jane Street
New York
|
-$6.92M |
| 3 |
Adage Capital Partners
Boston,
Massachusetts
|
-$5.95M |
| 4 |
OAM
Oberweis Asset Management
Lisle,
Illinois
|
-$4.18M |
| 5 |
Citadel Advisors
Miami,
Florida
|
-$4.04M |
ARDX Hedge Fund Activity: Q2 2025 in Review
206 of the 7,613 institutional investors tracked by Wall St. Rank reported a position in Ardelyx (ARDX) for Q2 2025, worth a combined $657M — down 19% from $809M a quarter earlier.
Sellers outnumbered buyers: 43 funds closed out of ARDX and 30 opened new positions — a net loss of 13 holders — while 63 trimmed existing stakes and 79 added.
The largest buyer was Millennium Management, adding an estimated $21.4M. The largest seller was Janus Henderson Group, cutting an estimated $40.9M.
- 206 institutional investors held Ardelyx (ARDX) as of Q2 2025, down from 221 in Q1 2025.
- Funds reported $657M of Ardelyx stock for Q2 2025, down 19% quarter-over-quarter.
- 30 funds opened new Ardelyx positions in Q2 2025 and 43 closed out, a net change of -13 holders.
- The largest Ardelyx buyer in Q2 2025 was Millennium Management, an estimated $21.4M added.
- The largest Ardelyx seller in Q2 2025 was Janus Henderson Group, an estimated $40.9M sold.
Based on aggregated 13F filings for Q2 2025.