Ardelyx
ARDX
249 hedge funds and large institutions have $906M invested in Ardelyx in 2026 Q2 according to their latest regulatory filings, with 44 funds opening new positions, 88 increasing their positions, 87 reducing their positions, and 34 closing their positions.
29% more first-time investments, than exits
New positions opened: 44 | Existing positions closed: 34
26% more call options, than puts
Call options by funds: $8.61M | Put options by funds: $6.81M
3% more funds holding
Funds holding: 242 → 249 (+7)
2.68% more ownership
Funds ownership: 69.15% → 71.83% (+2.7%)
1% more repeat investments, than reductions
Existing positions increased: 88 | Existing positions reduced: 87
11% less capital invested
Capital invested by funds: $1.01B → $906M (-$108M)
100% less funds holding in top 10
Funds holding in top 10: 1 → 0 (-1)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
RCMNY
Rubric Capital Management (New York)
New York
|
+$87.5M |
| 2 |
ACM
AIGH Capital Management
Baltimore,
Maryland
|
+$19.5M |
| 3 |
BlackRock
New York
|
+$14.3M |
| 4 |
NAMI
Nomura Asset Management International
Philadelphia,
Pennsylvania
|
+$8.41M |
| 5 |
Vanguard Portfolio Management
Malvern,
Pennsylvania
|
+$8.33M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Millennium Management
New York
|
-$24.1M |
| 2 |
Point72 Asset Management
Stamford,
Connecticut
|
-$17.9M |
| 3 |
Citadel Advisors
Miami,
Florida
|
-$14.9M |
| 4 |
FGP
Freestone Grove Partners
San Francisco,
California
|
-$9.93M |
| 5 |
Marshall Wace
London,
United Kingdom
|
-$9.43M |
ARDX Hedge Fund Activity: Q2 2026 in Review
249 institutional investors reported a position in Ardelyx (ARDX) for Q2 2026, worth a combined $906M — down 11% from $1.01B a quarter earlier.
Buyers outnumbered sellers: 44 funds opened new ARDX positions and 34 closed out — a net gain of 10 holders — while 88 added to existing stakes and 87 trimmed.
The largest buyer was Rubric Capital Management (New York), adding an estimated $87.5M. The largest seller was Millennium Management, cutting an estimated $24.1M.
- 249 institutional investors held Ardelyx (ARDX) as of Q2 2026, up from 242 in Q1 2026.
- Funds reported $906M of Ardelyx stock for Q2 2026, down 11% quarter-over-quarter.
- 44 funds opened new Ardelyx positions in Q2 2026 and 34 closed out, a net change of +10 holders.
- The largest Ardelyx buyer in Q2 2026 was Rubric Capital Management (New York), an estimated $87.5M added.
- The largest Ardelyx seller in Q2 2026 was Millennium Management, an estimated $24.1M sold.
Based on aggregated 13F filings for Q2 2026.