Ardelyx
ARDX
223 hedge funds and large institutions have $962M invested in Ardelyx in 2025 Q3 according to their latest regulatory filings, with 40 funds opening new positions, 78 increasing their positions, 73 reducing their positions, and 20 closing their positions.
100% more first-time investments, than exits
New positions opened: 40 | Existing positions closed: 20
46% more capital invested
Capital invested by funds: $657M → $962M (+$305M)
12% more call options, than puts
Call options by funds: $10.8M | Put options by funds: $9.66M
8% more funds holding
Funds holding: 206 → 223 (+17)
7% more repeat investments, than reductions
Existing positions increased: 78 | Existing positions reduced: 73
0% more funds holding in top 10
Funds holding in top 10: 2 → 2 (0)
2.68% less ownership
Funds ownership: 70.12% → 67.44% (-2.7%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Vanguard Group
Malvern,
Pennsylvania
|
+$12.7M |
| 2 |
N
Nuveen
Charlotte,
North Carolina
|
+$9.15M |
| 3 |
EP
Eversept Partners
New York
|
+$7.76M |
| 4 |
Jane Street
New York
|
+$7.74M |
| 5 |
Walleye Capital
New York
|
+$6.5M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Millennium Management
New York
|
-$21.8M |
| 2 |
Bank of America
Charlotte,
North Carolina
|
-$15.6M |
| 3 |
Marshall Wace
London,
United Kingdom
|
-$12.5M |
| 4 |
Goldman Sachs
New York
|
-$7.71M |
| 5 |
AG
Algert Global
San Francisco,
California
|
-$6.8M |
ARDX Hedge Fund Activity: Q3 2025 in Review
223 of the 7,620 institutional investors tracked by Wall St. Rank reported a position in Ardelyx (ARDX) for Q3 2025, worth a combined $962M — up 46% from $657M a quarter earlier.
Buyers outnumbered sellers: 40 funds opened new ARDX positions and 20 closed out — a net gain of 20 holders — while 78 added to existing stakes and 73 trimmed.
The largest buyer was Vanguard Group, adding an estimated $12.7M. The largest seller was Millennium Management, cutting an estimated $21.8M.
- 223 institutional investors held Ardelyx (ARDX) as of Q3 2025, up from 206 in Q2 2025.
- Funds reported $962M of Ardelyx stock for Q3 2025, up 46% quarter-over-quarter.
- 40 funds opened new Ardelyx positions in Q3 2025 and 20 closed out, a net change of +20 holders.
- The largest Ardelyx buyer in Q3 2025 was Vanguard Group, an estimated $12.7M added.
- The largest Ardelyx seller in Q3 2025 was Millennium Management, an estimated $21.8M sold.
Based on aggregated 13F filings for Q3 2025.