Ardelyx
ARDX · NASDAQ
$3.21+$0.12 (+3.88%)TodayMarket closed ·
Prev close $3.09
Who owns ARDX
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 43.2% of ARDX’s shares.
- BlackRock Institutional Trust Company, N.A.7.4%
- Rubric Capital Management LP6.6%
- Millennium Management LLC5.6%
- State Street Investment Management (US)5.4%
- Next 6 largest institutions18.2%
- All other shareholders56.8%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 18.23M | 7.38% |
| Rubric Capital Management LP | 16.20M | 6.56% |
| Millennium Management LLC | 13.90M | 5.63% |
| State Street Investment Management (US) | 13.36M | 5.41% |
| Vanguard Capital Management, LLC | 10.47M | 4.24% |
| Nomura Investment Management Business Trust | 9.55M | 3.86% |
| Vanguard Portfolio Management, LLC | 8.03M | 3.25% |
| Geode Capital Management, L.L.C. | 6.40M | 2.59% |
| Janus Henderson Investors | 5.30M | 2.15% |
| Two Sigma Investments, LP | 5.21M | 2.11% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| State Street SPDR S&P Biotech ETF | 7.83M | 3.17% |
| Nomura Small Cap Core Fund | 7.63M | 3.09% |
| Vanguard Total Stock Market Index Fund | 7.40M | 3.00% |
| iShares Russell 2000 ETF | 6.33M | 2.56% |
| Vanguard Extended Market Index Fund | 2.84M | 1.15% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $2.23M (44 trades) of ARDX on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Hohenleitner Susan | Sale | 1.56K | $6.01K |
| Brady James Parker | Sale | 13.16K | $50.76K |
| Brady James Parker | Sale | 1.98K | $7.62K |
| Reilly Joseph James | Sale | 1.11K | $4.28K |
| Reilly Joseph James | Sale | 2.87K | $11.08K |
| Foster Eric Duane | Sale | 2.58K | $9.93K |
| Foster Eric Duane | Sale | 3.39K | $13.07K |
| Foster Eric Duane | Sale | 2.60K | $10.02K |
| Kelliher Mike | Sale | 2.00K | $7.72K |
| Kelliher Mike | Sale | 2.65K | $10.23K |
Short interest
Settled Sep 30, 2026
- Shares short
- 27.68M
- Days to cover
- 6.60
- % of shares outstanding
- 11.20%
- Average daily volume
- 4.19M
- Change since last report
- +8.1%
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