As of March 23, 2026, the three largest insider holders of PTGX are Suneel Gupta (Chief Development Officer, 267.43K shares), David Y Liu (Chief Rd Strategy Officer, 167.59K shares), Arturo Md Molina (Chief Medical Officer, 84.11K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Suneel Gupta | Chief Development Officer | 267,433 | 0 | 27 Nov, 2024 |
| David Y Liu | Chief Rd Strategy Officer | 167,590 | 0 | 17 Nov, 2022 |
| Arturo Md Molina | Chief Medical Officer | 84,115 | 0 | 27 Jan, 2026 |
| Harold E Selick | 60,845 | 0 | 13 Jan, 2026 | |
| Asif Ali | Chief Financial Officer | 60,320 | 0 | 27 Jan, 2026 |
| Donald A. Kalkofen | Chief Financial Officer | 18,521 | 0 | 17 Feb, 2022 |
| Bryan Giraudo | 17,825 | 0 | 06 Jan, 2026 | |
| Bryan Giraudo | 17,825 | 0 | 06 Jan, 2026 | |
| Sarah A O'Dowd | 7,825 | 0 | 06 Jan, 2026 | |
| William D. Waddill | 7,825 | 0 | 06 Feb, 2026 | |
| Lewis T Williams | 7,825 | 0 | 18 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 |
|---|---|---|---|---|---|---|---|---|
| 17 Feb, 2026 | Lewis T Williams | Common Stock | A | 18,000 | $10.84 | 25,825 | D | M |
| 17 Feb, 2026 | Lewis T Williams | Common Stock | D | 18,000 | $82.42 | 7,825 | D | S |
| 17 Feb, 2026 | Lewis T Williams | Stock Option (right to buy) | A | 18,000 | $0.00 | 6,000 | D | M |
| 06 Feb, 2026 | William D. Waddill | Common Stock | A | 20,000 | $8.31 | 27,825 | D | M |
| 06 Feb, 2026 | William D. Waddill | Common Stock | D | 20,000 | $83.68 | 7,825 | D | S |
| 06 Feb, 2026 | William D. Waddill | Stock Option (right to buy) | D | 20,000 | $0.00 | 0 | D | M |
| 23 Jan, 2026 | Arturo Md Molina | Common Stock | D | 13,151 | $82.42 | 84,115 | D | S |
| 27 Jan, 2026 | Asif Ali | Common Stock | A | 16,000 | $19.19 | 94,523 | D | M |
| 26 Jan, 2026 | Arturo Md Molina | Common Stock | A | 5,000 | $8.04 | 89,115 | D | M |
| 27 Jan, 2026 | Asif Ali | Common Stock | A | 12,000 | $12.17 | 106,523 | D | M |
| 26 Jan, 2026 | Arturo Md Molina | Common Stock | D | 5,000 | $82.28 | 84,115 | D | S |
| 27 Jan, 2026 | Asif Ali | Common Stock | D | 28,000 | $83.13 | 78,523 | D | S |
| 27 Jan, 2026 | Asif Ali | Common Stock | D | 18,203 | $83.14 | 60,320 | D | S |
| 27 Jan, 2026 | Arturo Md Molina | Common Stock | A | 5,000 | $8.04 | 89,115 | D | M |
| 27 Jan, 2026 | Arturo Md Molina | Common Stock | D | 5,000 | $82.00 | 84,115 | D | S |
| 27 Jan, 2026 | Asif Ali | Stock Option (right to buy) | D | 16,000 | $0.00 | 50,800 | D | M |
| 26 Jan, 2026 | Arturo Md Molina | Stock Option (right to buy) | D | 5,000 | $0.00 | 70,971 | D | M |
| 27 Jan, 2026 | Asif Ali | Stock Option (right to buy) | D | 12,000 | $0.00 | 18,547 | D | M |
| 27 Jan, 2026 | Arturo Md Molina | Stock Option (right to buy) | D | 5,000 | $0.00 | 65,971 | D | M |
| 20 Jan, 2026 | Arturo Md Molina | Common Stock | D | 9,514 | $82.48 | 97,266 | D | S |