ARDX · Insider trading · 13F holders · Congress trades
Ardelyx, Inc. (ARDX)
Who is buying and selling ARDX: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 10
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $486K
- Congress trades, 12 months
- 0
ARDX at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 8 ARDX insiders filed 8 sales worth $486K on SEC Form 4, and no open-market purchases.
- 10 13F filers hold ARDX among their 50 largest positions, worth $113.2M combined. The biggest bets by portfolio weight are Lion Point Capital, LP (3.1%), AIGH Capital Management LLC (1.5%) and Krensavage Asset Management, LLC (1.0%). In their latest 13Fs, 1 manager opened a new position and 3 added to one.
- No member of Congress has disclosed a trade in ARDX.
- ARDX last closed at $3.10 on Oct 29, 2026.
ARDX insider trading
Between Aug 1, 2026 and Oct 29, 2026, 8 ARDX insiders filed 8 sales worth $486K on SEC Form 4, and no open-market purchases.
| Filed | Insider | Role | Trade | Shares | Price | Value | Form 4 |
|---|---|---|---|---|---|---|---|
| Aug 25, 2026 | Raab Michael | President & CEO, Director | Sale | 58,574 | $3.86 | $226K | SEC |
| Aug 25, 2026 | Bishop John E | See Remarks | Sale | 19,750 | $3.86 | $76K | SEC |
| Aug 25, 2026 | Brady James Parker | Chief Human Resources Officer | Sale | 15,136 | $3.86 | $58K | SEC |
| Aug 25, 2026 | Williams Laura A | Chief Patient Officer | Sale | 10,739 | $3.86 | $41K | SEC |
| Aug 25, 2026 | Foster Eric Duane | Chief Commercial Officer | Sale | 8,562 | $3.86 | $33K | SEC |
| Aug 25, 2026 | Kelliher Mike | Chief Business Officer | Sale | 7,758 | $3.86 | $30K | SEC |
| Aug 25, 2026 | Reilly Joseph James | See Remarks | Sale | 3,982 | $3.86 | $15K | SEC |
| Aug 25, 2026 | Hohenleitner Susan | Chief Financial Officer | Sale | 1,558 | $3.86 | $6K | SEC |
Who owns ARDX? Hedge funds and superinvestors
10 13F filers hold ARDX among their 50 largest positions, worth $113.2M combined. The biggest bets by portfolio weight are Lion Point Capital, LP (3.1%), AIGH Capital Management LLC (1.5%) and Krensavage Asset Management, LLC (1.0%). In their latest 13Fs, 1 manager opened a new position and 3 added to one.
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Rubric Capital Management LPHedge fund | 0.8% | $82.6M | 16,202,700 | — | Q2 2026 |
| AIGH Capital Management LLCHedge fund | 1.5% | $16.3M | 3,200,000 | New | Q2 2026 |
| Sector Gamma AsInvestment manager | 0.8% | $3.5M | 686,844 | +33.1% shares | Q2 2026 |
| Redmile Group, LLCHedge fund | 0.2% | $3.3M | 641,750 | -12.5% shares | Q2 2026 |
| Krensavage Asset Management, LLCHedge fund | 1.0% | $2.7M | 534,523 | +6.9% shares | Q2 2026 |
| Diadema Partners LPHedge fund | 0.6% | $1.5M | 303,025 | — | Q2 2026 |
| Knott David M JrInvestment manager | 0.7% | $1.3M | 263,168 | +27.1% shares | Q2 2026 |
| Clay Northam Wealth Management, LLCWealth manager | 0.5% | $1.1M | 314,215 | -6.0% shares | Q3 2026 |
| Lion Point Capital, LPHedge fund | 3.1% | $656K | 128,650 | +0.0% shares | Q2 2026 |
| PSP Research LLCInstitutional asset manager | 0.1% | $103K | 30,000 | -50.0% shares | Q3 2026 |
Each manager counts with its latest 13F (Q3 2026: 2, Q2 2026: 8). Screen ARDX in the grand portfolio →
ARDX stock trades by members of Congress
No member of Congress has disclosed a trade in ARDX.
ARDX questions and answers
Are insiders buying ARDX stock?
Between Aug 1, 2026 and Oct 29, 2026, 8 ARDX insiders filed 8 sales worth $486K on SEC Form 4, and no open-market purchases.
Which hedge funds own ARDX?
10 13F filers hold ARDX among their 50 largest positions, worth $113.2M combined. The biggest bets by portfolio weight are Lion Point Capital, LP (3.1%), AIGH Capital Management LLC (1.5%) and Krensavage Asset Management, LLC (1.0%). In their latest 13Fs, 1 manager opened a new position and 3 added to one.
Has Congress traded ARDX?
No member of Congress has disclosed a trade in ARDX.
Who is the largest holder of ARDX?
Among 13F filers, Rubric Capital Management LP reports the largest ARDX position, $82.6M (16,202,700 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Lion Point Capital, LP's: 3.1% of its portfolio.
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