ARDX's three largest insider shareholders as of May 30, 2026 are David M Mott (Director, 3.30Mn shares), Michael Raab (President Ceo, 1.80Mn shares), David P. Rosenbaum (Chief Development Officer, 448.38K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Elizabeth A Grammer | Evp, General Counsel | 299,895 | 0 | 25 Nov, 2025 |
| David M Mott | - | 3,302,918 | 0 | 23 Feb, 2026 |
| Richard J Rodgers | - | 413,543 | 0 | 23 Jun, 2025 |
| Michael Raab | President Ceo | 1,795,614 | 0 | 17 Apr, 2026 |
| Justin A Renz | Chief Financial Officer | 409,052 | 0 | 25 Aug, 2025 |
| Jan M Lundberg | - | 146,794 | 0 | 16 Jun, 2023 |
| Jeffrey W Jacobs | Chief Scientific Officer | 119,483 | 0 | 24 Nov, 2021 |
| David P. Rosenbaum | Chief Development Officer | 297,005 | 151,373 | 22 Nov, 2024 |
| Robert B Bazemore | - | 41,551 | 0 | 23 Jun, 2025 |
| Robert Blanks | - | 314,421 | 0 | 22 Nov, 2024 |
| Muna Bhanji | - | 137,353 | 0 | 23 Jun, 2025 |
| Laura A Williams | Chief Patient Officer | 436,082 | 0 | 23 Feb, 2026 |
| Robert Ora Felsch | - | 91,560 | 0 | 22 Aug, 2024 |
| Mike Kelliher | Chief Business Officer | 364,666 | 0 | 23 Feb, 2026 |
| Eric Duane Foster | Chief Commercial Officer | 425,970 | 0 | 23 Feb, 2026 |
| Joseph James Reilly | - | 151,790 | 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 |
* 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 | 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 |
| 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 | 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 | Mike Kelliher | Common Stock | D | 8,434 | $5.87 | 365,827 | D | S |
| 20 Feb, 2026 | Susan Hohenleitner | Common Stock | D | 1,786 | $5.87 | 230,780 | D | S |
| 20 Feb, 2026 | James Parker Brady | Common Stock | D | 2,234 | $5.87 | 263,221 | D | S |
| 20 Feb, 2026 | Eric Duane Foster | Common Stock | D | 9,176 | $5.87 | 427,233 | D | S |
| 20 Feb, 2026 | Laura A Williams | Common Stock | D | 7,192 | $5.87 | 437,066 | D | S |
| 20 Feb, 2026 | Laura A Williams | Common Stock | D | 7,192 | $5.87 | 437,066 | D | S |
| 20 Feb, 2026 | Mike Kelliher | Common Stock | D | 8,434 | $5.87 | 365,827 | D | S |
| 20 Feb, 2026 | James Parker Brady | Common Stock | D | 2,234 | $5.87 | 263,221 | D | S |
| 20 Feb, 2026 | Eric Duane Foster | Common Stock | D | 9,176 | $5.87 | 427,233 | D | S |
| 20 Feb, 2026 | Joseph James Reilly | Common Stock | D | 4,387 | $5.87 | 152,394 | D | S |