PHAT
Phathom Pharmaceuticals Inc
NASDAQ: PHAT · HEALTHCARE · BIOTECHNOLOGY
$5.25
+3.35% today
Updated 2026-11-06
Market cap
$466.61M
P/E ratio
—
P/S ratio
1.70x
EPS (TTM)
$-1.26
Dividend yield
—
52W range
$5 – $18
Volume
1.5M
Phathom Pharmaceuticals Inc (PHAT) Insider transactions
Net insider activity
Net buying (3,826,872 shares)
Buy transactions
67
Sell transactions
33
All transactions
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-09-03 | BREEDLOVE, ROBERT CHARLES | Principal Accounting Officer | Sale | 460 | $9.05 | $4163.00 |
| 2026-07-14 | BREEDLOVE, ROBERT CHARLES | Principal Accounting Officer | Sale | 1,555 | $11.04 | $17159.42 |
| 2026-05-22 | PARIKH, ASIT | Director | Buy | 28,000 | — | — |
| 2026-05-20 | PARIKH, ASIT | Director | Sale | 17,500 | — | — |
| 2026-05-20 | PARIKH, ASIT | Director | Buy | 17,500 | $4.95 | $86625.00 |
| 2026-05-19 | TOPPER, JAMES N | Director, 10% Owner | Buy | 24,122 | — | — |
| 2026-05-19 | STENHOUSE, MARK | Director | Buy | 24,122 | — | — |
| 2026-05-19 | SCHROEDER, THEODORE R | Director | Buy | 24,122 | — | — |
| 2026-05-19 | PARIKH, ASIT | Director | Buy | 24,122 | — | — |
| 2026-05-19 | KARBE, FRANK | Director | Buy | 24,122 | — | — |
| 2026-05-19 | FIELDS, HEIDI | Director | Buy | 24,122 | — | — |
| 2026-05-19 | COLA, MICHAEL F | Director | Buy | 24,122 | — | — |
| 2026-03-10 | PARIKH, ASIT | Director | Sale | 40,000 | — | — |
| 2026-02-27 | BREEDLOVE, ROBERT CHARLES | Principal Accounting Officer | Buy | 13,000 | — | — |
| 2026-02-27 | BREEDLOVE, ROBERT CHARLES | Principal Accounting Officer | Buy | 2,790 | — | — |
| 2026-02-27 | BREEDLOVE, ROBERT CHARLES | Principal Accounting Officer | Sale | 964 | $12.56 | $12107.84 |
| 2026-02-27 | BREEDLOVE, ROBERT CHARLES | Principal Accounting Officer | Sale | 414 | $12.56 | $5199.84 |
| 2026-02-10 | COOK, ANNE MARIE | Chief Legal Off. & Corp. Sec. | Buy | 3,461 | — | — |
| 2026-02-10 | COOK, ANNE MARIE | Chief Legal Off. & Corp. Sec. | Sale | 1,535 | $12.82 | $19678.70 |
| 2026-02-10 | BASTA, STEVEN L | Director, President and CEO | Buy | 12,362 | — | — |
| 2026-02-10 | BASTA, STEVEN L | Director, President and CEO | Sale | 6,277 | $12.82 | $80471.14 |
| 2026-01-23 | PARIKH, ASIT | Director | Buy | 80,500 | — | — |
| 2026-01-21 | BREEDLOVE, ROBERT CHARLES | Principal Accounting Officer | Sale | 776 | $13.61 | $10561.36 |
| 2026-01-13 | PARIKH, ASIT | Director | Sale | 8,750 | — | — |
| 2026-01-13 | PARIKH, ASIT | Director | Buy | 8,750 | $10.30 | $90125.00 |
| 2026-01-02 | NARULA, SANJEEV | Chief Financial & Bus. Officer | Buy | 42,848 | — | — |
| 2026-01-02 | NARULA, SANJEEV | Chief Financial & Bus. Officer | Buy | 82,715 | — | — |
| 2026-01-02 | COOK, ANNE MARIE | Chief Legal Off. & Corp. Sec. | Buy | 67,878 | — | — |
| 2026-01-02 | COOK, ANNE MARIE | Chief Legal Off. & Corp. Sec. | Buy | 75,345 | — | — |
| 2026-01-02 | BASTA, STEVEN L | Director, President and CEO | Buy | 226,156 | — | — |
| 2026-01-02 | BASTA, STEVEN L | Director, President and CEO | Buy | 251,034 | — | — |
| 2025-12-19 | PARIKH, ASIT | Director | Sale | 8,750 | — | — |
| 2025-12-19 | PARIKH, ASIT | Director | Buy | 8,750 | $10.30 | $90125.00 |
| 2025-12-18 | BREEDLOVE, ROBERT CHARLES | Principal Accounting Officer | Sale | 230 | $16.28 | $3744.40 |
| 2025-12-17 | COOK, ANNE MARIE | Chief Legal Off. & Corp. Sec. | Buy | 17,370 | — | — |
| 2025-12-17 | COOK, ANNE MARIE | Chief Legal Off. & Corp. Sec. | Sale | 7,703 | $15.36 | $118318.08 |
| 2025-12-17 | BASTA, STEVEN L | Director, President and CEO | Buy | 62,038 | — | — |
| 2025-12-17 | BASTA, STEVEN L | Director, President and CEO | Sale | 31,502 | $15.36 | $483870.72 |
| 2025-11-28 | BASTA, STEVEN L | Director, President and CEO | Sale | 90,000 | — | — |
| 2025-11-28 | BASTA, STEVEN L | Director, President and CEO | Buy | 90,000 | — | — |
| 2025-11-28 | BASTA, STEVEN L | Director, President and CEO | Sale | 48,375 | $15.62 | $755617.50 |
| 2025-11-03 | BREEDLOVE, ROBERT CHARLES | Principal Accounting Officer | Sale | 524 | $13.51 | $7079.24 |
| 2025-10-06 | NARULA, SANJEEV | Chief Financial & Bus. Officer | Buy | 200,000 | — | — |
| 2025-10-06 | NARULA, SANJEEV | Chief Financial & Bus. Officer | Buy | 144,000 | — | — |
| 2025-09-25 | BASTA, STEVEN L | Director, President and CEO | Sale | 90,000 | — | — |
| 2025-09-25 | BASTA, STEVEN L | Director, President and CEO | Buy | 90,000 | — | — |
| 2025-09-25 | BASTA, STEVEN L | Director, President and CEO | Sale | 48,375 | $11.66 | $564052.50 |
| 2025-09-05 | BREEDLOVE, ROBERT CHARLES | Principal Accounting Officer | Sale | 461 | $12.09 | $5573.49 |
| 2025-07-16 | BREEDLOVE, ROBERT CHARLES | Principal Accounting Officer | Sale | 1,692 | $8.36 | $14151.72 |
| 2025-06-23 | COOK, ANNE MARIE | Chief Legal Off. & Corp. Sec. | Buy | 210,000 | — | — |
| 2025-06-03 | TOPPER, JAMES N | Director, 10% Owner | Buy | 17,500 | — | — |
| 2025-06-03 | TOPPER, JAMES N | Director, 10% Owner | Buy | 10,500 | — | — |
| 2025-06-03 | STENHOUSE, MARK | Director | Buy | 17,500 | — | — |
| 2025-06-03 | STENHOUSE, MARK | Director | Buy | 10,500 | — | — |
| 2025-06-03 | PARIKH, ASIT | Director | Buy | 17,500 | — | — |
| 2025-06-03 | PARIKH, ASIT | Director | Buy | 10,500 | — | — |
| 2025-06-03 | KARBE, FRANK | Director | Buy | 17,500 | — | — |
| 2025-06-03 | KARBE, FRANK | Director | Buy | 10,500 | — | — |
| 2025-06-03 | FIELDS, HEIDI | Director | Buy | 17,500 | — | — |
| 2025-06-03 | FIELDS, HEIDI | Director | Buy | 10,500 | — | — |
| 2025-06-03 | COLA, MICHAEL F | Director | Buy | 17,500 | — | — |
| 2025-06-03 | COLA, MICHAEL F | Director | Buy | 10,500 | — | — |
| 2025-05-21 | TOPPER, JAMES N | Director | Buy | 3,780 | $3.86 | $14609.32 |
| 2025-05-19 | BREEDLOVE, ROBERT CHARLES | Principal Accounting Officer | Buy | 33,000 | — | — |
| 2025-05-14 | TOPPER, JAMES N | Director | Buy | 6,300 | $3.32 | $20919.15 |
| 2025-05-13 | TOPPER, JAMES N | Director | Buy | 1,120 | $3.16 | $3543.34 |
| 2025-05-12 | TOPPER, JAMES N | Director | Buy | 12,601 | $3.04 | $38300.74 |
| 2025-05-09 | TOPPER, JAMES N | Director | Buy | 33,376 | $3.19 | $106562.89 |
| 2025-05-09 | TOPPER, JAMES N | Director | Buy | 2,226 | $3.62 | $8053.00 |
| 2025-05-07 | PARIKH, ASIT | Director | Buy | 5,000 | $2.40 | $11984.50 |
| 2025-05-06 | PARIKH, ASIT | Director | Buy | 5,000 | $2.60 | $13000.00 |
| 2025-04-16 | SCHROEDER, THEODORE R | Director | Buy | 35,000 | — | — |
| 2025-04-16 | SCHROEDER, THEODORE R | Director | Buy | 21,000 | — | — |
| 2025-04-07 | HENDERSON, MOLLY | CFO and CBO | Sale | 3,678 | $4.55 | $16739.68 |
| 2025-04-03 | BASTA, STEVEN L | Director, President and CEO | Buy | 1,085,000 | — | — |
| 2025-04-03 | BASTA, STEVEN L | Director, President and CEO | Buy | 360,000 | — | — |
| 2025-03-13 | PARIKH, ASIT | Director | Buy | 10,000 | $4.42 | $44200.00 |
| 2025-02-27 | NABULSI, AZMI | Chief Operating Officer | Buy | 55,000 | — | — |
| 2025-02-27 | NABULSI, AZMI | Chief Operating Officer | Buy | 79,200 | — | — |
| 2025-02-27 | HENDERSON, MOLLY | CFO and CBO | Buy | 50,000 | — | — |
| 2025-02-27 | HENDERSON, MOLLY | CFO and CBO | Buy | 72,000 | — | — |
| 2025-02-27 | CURRAN, TERRIE | Director, President and Chief Executive | Buy | 342,500 | — | — |
| 2025-01-21 | NABULSI, AZMI | Chief Operating Officer | Sale | 7,886 | $6.59 | $51956.91 |
| 2025-01-21 | HENDERSON, MOLLY | CFO and CBO | Sale | 6,583 | $6.59 | $43370.78 |
| 2025-01-21 | CURRAN, TERRIE | Director, President and Chief Executive | Sale | 19,109 | $6.59 | $125884.36 |
| 2024-12-19 | NABULSI, AZMI | Chief Operating Officer | Sale | 1,118 | $8.00 | $8944.00 |
| 2024-12-19 | HENDERSON, MOLLY | CFO and CBO | Sale | 1,291 | $8.00 | $10328.00 |
| 2024-12-13 | PARIKH, ASIT | Director | Buy | 10,000 | $8.12 | $81248.00 |
| 2024-12-13 | KARBE, FRANK | Director | Buy | 12,500 | $7.93 | $99083.75 |
| 2024-09-10 | PARIKH, ASIT | Director | Sale | 7,500 | — | — |
| 2024-09-10 | PARIKH, ASIT | Director | Buy | 7,500 | $11.72 | $87900.00 |
| 2024-07-15 | NABULSI, AZMI | Chief Operating Officer | Sale | 10,901 | $11.72 | $127759.72 |
| 2024-07-15 | HENDERSON, MOLLY | CFO and CBO | Sale | 4,325 | $11.72 | $50689.00 |
| 2024-07-15 | CURRAN, TERRIE | Director, President and Chief Executive | Sale | 33,848 | $11.72 | $396698.56 |
| 2024-05-31 | NABULSI, AZMI | Chief Operating Officer | Buy | 7,500 | — | — |
| 2024-05-31 | HENDERSON, MOLLY | CFO and CBO | Buy | 7,500 | — | — |
| 2024-05-29 | KARBE, FRANK | Director | Buy | 25,000 | $10.16 | $254112.50 |
| 2024-05-23 | TOPPER, JAMES N | Director, 10% Owner | Sale | 17,500 | — | — |
| 2024-05-23 | TOPPER, JAMES N | Director, 10% Owner | Buy | 10,500 | — | — |
| 2024-05-23 | STENHOUSE, MARK | Director | Sale | 17,500 | — | — |
Frequently asked questions
Are PHAT insiders buying or selling?
Over the transactions on record, PHAT insiders have been net buyers, with about $2.93M in stock sold across 33 sales, against 16 open-market purchases.
Does insider selling at PHAT mean the stock will fall?
Not by itself. Most executive selling is pre-scheduled through 10b5-1 plans filed months in advance, and insiders sell for diversification, taxes, and liquidity far more often than out of any view on the price. Insider buying is the stronger signal, especially when several insiders buy around the same time, because there is usually only one reason to put personal cash into the stock.
Which PHAT insiders are selling the most?
Recent selling is concentrated in a few names. BASTA, STEVEN L accounts for the largest share on record, with about $1.88M sold. Selling by one or two individuals matters less than broad selling across the whole leadership team, which is the pattern worth watching.