Based on data from the past 90 days ending December 12, 2025, Phathom Pharmaceuticals's three largest insider shareholders are Chief Financial & Bus. Officer Sanjeev Narula (144.00K shares), President And CEO Steven L Basta (83.25K shares), Principal Accounting Officer Robert Charles Breedlove (47.41K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Pharmaceutical Co Ltd Takeda | 3,755,583 | 25 Jan, 2024 | |
| Capital Management, L.P. Ra | 3,115,008 | 15 Mar, 2021 | |
| David A Socks | 1,230,846 | 24 May, 2024 | |
| Azmi Nabulsi | Chief Operating Officer | 1,098,290 | 03 Mar, 2025 |
| Terrie Curran | President And Chief Executive | 360,465 | 23 Jan, 2025 |
| Sanjeev Narula | Chief Financial & Bus. Officer | 144,000 | 08 Oct, 2025 |
| Asit Parikh | 113,500 | 05 Jun, 2025 | |
| James N Topper | 101,999 | 05 Jun, 2025 | |
| Molly Henderson | CFO And Cbo | 89,868 | 08 Apr, 2025 |
| Steven L Basta | President And CEO | 83,250 | 02 Dec, 2025 |
| Frank Karbe | 67,500 | 05 Jun, 2025 | |
| Robert Charles Breedlove | Principal Accounting Officer | 47,407 | 05 Nov, 2025 |
| Michael F Cola | 39,798 | 05 Jun, 2025 | |
| Mark Stenhouse | 30,000 | 05 Jun, 2025 | |
| Heidi Fields | 30,000 | 05 Jun, 2025 | |
| Theodore R Schroeder | 21,000 | 16 Apr, 2025 | |
| Anthony J. Guzzo | VP And Chief Accounting Officer | 8,399 | 21 Jan, 2022 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 28 Nov, 2025 | Steven L Basta | Common Stock | A | 90,000 | $0.00 | 131,625 | D | M |
| 28 Nov, 2025 | Steven L Basta | Common Stock | D | 48,375 | $15.62 | 83,250 | D | F |
| 03 Nov, 2025 | Robert Charles Breedlove | Common Stock | D | 524 | $13.51 | 47,407 | D | S |
| 06 Oct, 2025 | Sanjeev Narula | Common Stock | A | 144,000 | $0.00 | 144,000 | D | A |
| 25 Sep, 2025 | Steven L Basta | Common Stock | A | 90,000 | $0.00 | 90,000 | D | M |
| 25 Sep, 2025 | Steven L Basta | Common Stock | D | 48,375 | $11.66 | 41,625 | D | F |
| 05 Sep, 2025 | Robert Charles Breedlove | Common Stock | D | 461 | $12.09 | 47,931 | D | S |
| 16 Jul, 2025 | Robert Charles Breedlove | Common Stock | D | 1,692 | $8.36 | 48,392 | D | S |
| 03 Jun, 2025 | Mark Stenhouse | Common Stock | A | 10,500 | $0.00 | 30,000 | D | A |
| 03 Jun, 2025 | Frank Karbe | Common Stock | A | 10,500 | $0.00 | 67,500 | D | A |
| 03 Jun, 2025 | Heidi Fields | Common Stock | A | 10,500 | $0.00 | 30,000 | D | A |
| 03 Jun, 2025 | Michael F Cola | Common Stock | A | 10,500 | $0.00 | 39,798 | D | A |
| 03 Jun, 2025 | James N Topper | Common Stock | A | 10,500 | $0.00 | 42,596 | D | A |
| 03 Jun, 2025 | Asit Parikh | Common Stock | A | 10,500 | $0.00 | 113,500 | D | A |
| 03 Jun, 2025 | Mark Stenhouse | - | - | 30,000 | D | |||
| 21 May, 2025 | James N Topper | Common Stock | A | 3,780 | $3.86 | 59,403 | I | P |
| 13 May, 2025 | James N Topper | Common Stock | A | 1,120 | $3.16 | 49,323 | I | P |
| 14 May, 2025 | James N Topper | Common Stock | A | 6,300 | $3.32 | 55,623 | I | P |
| 09 May, 2025 | James N Topper | - | - | 33,376 | I | |||
| 09 May, 2025 | James N Topper | Common Stock | A | 33,376 | $3.19 | 33,376 | I | P |