ARDX's three largest insider shareholders as of May 04, 2026 are Scott D Sandell (TenPercentOwner, 10.75Mn shares), David M Mott (Director, 3.30Mn shares), Michael Raab (President Ceo, 1.82Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Scott D Sandell | - | 0 | 10,752,012 | 27 Dec, 2021 |
| David M Mott | - | 3,302,918 | 0 | 23 Feb, 2026 |
| Michael Raab | President Ceo | 1,816,448 | 0 | 18 Mar, 2026 |
| Michael Raab | President Ceo | 1,795,614 | 0 | 17 Apr, 2026 |
| Susan Rodriguez | Chief Commercial Officer | 449,092 | 0 | 23 May, 2024 |
| David P. Rosenbaum | Chief Development Officer | 297,005 | 151,373 | 22 Nov, 2024 |
| David P. Rosenbaum | Chief Development Officer | 297,005 | 151,373 | 22 Nov, 2024 |
| Laura A Williams | Chief Patient Officer | 436,082 | 0 | 23 Feb, 2026 |
| Laura A Williams | Chief Patient Officer | 436,082 | 0 | 23 Feb, 2026 |
| Eric Duane Foster | Chief Commercial Officer | 425,970 | 0 | 23 Feb, 2026 |
| Eric Duane Foster | Chief Commercial Officer | 425,970 | 0 | 23 Feb, 2026 |
| Justin A Renz | Chief Financial Officer | 409,052 | 0 | 25 Aug, 2025 |
| Justin A Renz | Chief Financial Officer | 409,052 | 0 | 25 Aug, 2025 |
| Mike Kelliher | Chief Business Officer | 364,666 | 0 | 23 Feb, 2026 |
| Mike Kelliher | Chief Business Officer | 364,666 | 0 | 23 Feb, 2026 |
| John E Bishop | - | 339,151 | 0 | 23 Feb, 2026 |
| Robert Blanks | - | 314,421 | 0 | 22 Nov, 2024 |
| Robert Blanks | - | 314,421 | 0 | 22 Nov, 2024 |
| Elizabeth A Grammer | Evp, General Counsel | 299,895 | 0 | 25 Nov, 2025 |
| Elizabeth A Grammer | Evp, General Counsel | 299,895 | 0 | 25 Nov, 2025 |
| William C Jr Bertrand | - | 290,707 | 0 | 23 Jun, 2025 |
| James Parker Brady | Chief Human Resources Officer | 262,912 | 0 | 23 Feb, 2026 |
| James Parker Brady | Chief Human Resources Officer | 262,912 | 0 | 23 Feb, 2026 |
| Susan Hohenleitner | Chief Financial Officer | 230,533 | 0 | 23 Feb, 2026 |
| Susan Hohenleitner | Chief Financial Officer | 230,533 | 0 | 23 Feb, 2026 |
| Joseph James Reilly | - | 151,790 | 0 | 23 Feb, 2026 |
| Joseph James Reilly | - | 151,790 | 0 | 23 Feb, 2026 |
| Onaiza Cadoret-Manier | - | 151,701 | 0 | 23 Jun, 2025 |
| Jan M Lundberg | - | 146,794 | 0 | 16 Jun, 2023 |
| Jan M Lundberg | - | 146,794 | 0 | 16 Jun, 2023 |
| Muna Bhanji | - | 137,353 | 0 | 23 Jun, 2025 |
| Jeffrey W Jacobs | Chief Scientific Officer | 119,483 | 0 | 24 Nov, 2021 |
| Jeffrey W Jacobs | Chief Scientific Officer | 119,483 | 0 | 24 Nov, 2021 |
| Robert Ora Felsch | - | 91,560 | 0 | 22 Aug, 2024 |
| Robert Ora Felsch | - | 91,560 | 0 | 22 Aug, 2024 |
| Merdad Parsey | - | 57,291 | 0 | 23 Jun, 2025 |
| Robert B Bazemore | - | 41,551 | 0 | 23 Jun, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 15 Apr, 2026 | Michael Raab | Common Stock | A | 20,834 | $0.99 | 1,837,282 | D | M |
| 15 Apr, 2026 | Michael Raab | Common Stock | D | 41,668 | $6.29 | 1,795,614 | D | S |
| 15 Apr, 2026 | Michael Raab | Stock Option (Right to Buy) | D | 20,834 | $0.00 | 353,334 | D | M |
| 16 Mar, 2026 | Michael Raab | Common Stock | A | 20,833 | $0.99 | 1,856,986 | D | M |
| 16 Mar, 2026 | Michael Raab | Common Stock | A | 20,833 | $0.99 | 1,856,986 | D | M |
| 16 Mar, 2026 | Michael Raab | Common Stock | D | 41,666 | $5.84 | 1,816,448 | D | S |
| 16 Mar, 2026 | Michael Raab | Common Stock | D | 41,666 | $5.84 | 1,816,448 | D | S |
| 16 Mar, 2026 | Michael Raab | Stock Option (Right to Buy) | D | 20,833 | $0.00 | 374,168 | D | M |
| 16 Mar, 2026 | Michael Raab | Stock Option (Right to Buy) | D | 20,833 | $0.00 | 374,168 | D | M |
| 24 Feb, 2026 | Michael Raab | Common Stock | A | 20,833 | $0.99 | 1,877,819 | D | M |
| 24 Feb, 2026 | Michael Raab | Common Stock | A | 20,833 | $0.99 | 1,877,819 | D | M |
| 24 Feb, 2026 | Michael Raab | Common Stock | D | 41,666 | $6.26 | 1,836,153 | D | S |
| 24 Feb, 2026 | Michael Raab | Common Stock | D | 41,666 | $6.26 | 1,836,153 | D | S |
| 24 Feb, 2026 | Michael Raab | Stock Option (Right to Buy) | D | 20,833 | $0.00 | 395,001 | D | M |
| 24 Feb, 2026 | Michael Raab | Stock Option (Right to Buy) | D | 20,833 | $0.00 | 395,001 | D | M |
| 20 Feb, 2026 | Joseph James Reilly | Common Stock | D | 4,387 | $5.87 | 152,394 | D | S |
| 20 Feb, 2026 | Michael Raab | Common Stock | D | 40,401 | $5.87 | 1,862,567 | D | S |
| 20 Feb, 2026 | James Parker Brady | Common Stock | D | 2,234 | $5.87 | 263,221 | D | S |
| 20 Feb, 2026 | Laura A Williams | Common Stock | D | 7,192 | $5.87 | 437,066 | D | S |
| 20 Feb, 2026 | Eric Duane Foster | Common Stock | D | 9,176 | $5.87 | 427,233 | D | S |