ASMB
Assembly Biosciences Inc
NASDAQ: ASMB · HEALTHCARE · BIOTECHNOLOGY
$26.95
+2.35% today
Updated 2026-04-30
Market cap
$442.93M
P/E ratio
—
P/S ratio
6.13x
EPS (TTM)
$-0.55
Dividend yield
—
52W range
$11 – $40
Volume
0.1M
Assembly Biosciences Inc (ASMB) Insider transactions
Net insider activity
Net buying (8,132,981 shares)
Buy transactions
64
Sell transactions
36
All transactions
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2025-08-08 | GILEAD, SCIENCES, INC. | 10% Owner | Buy | 2,295,920 | — | — |
| 2025-08-08 | GILEAD, SCIENCES, INC. | 10% Owner | Buy | 1,147,960 | — | — |
| 2025-08-08 | GILEAD, SCIENCES, INC. | 10% Owner | Buy | 1,147,960 | — | — |
| 2025-06-16 | BJORKQUIST, JEANETTE M | PFO and PAO | Buy | 600 | — | — |
| 2025-06-16 | BJORKQUIST, JEANETTE M | PFO and PAO | Buy | 300 | — | — |
| 2025-06-05 | RINGO, WILLIAM R | Director | Buy | 3,500 | — | — |
| 2025-06-05 | MCHUTCHISON, JOHN G | Director | Buy | 3,500 | — | — |
| 2025-06-05 | MAHONY, SUSAN | Director | Buy | 3,500 | — | — |
| 2025-06-05 | JOHNSON-PRATT, LISA | Director | Buy | 3,500 | — | — |
| 2025-06-05 | HOUGHTON, MICHAEL | Director | Buy | 3,500 | — | — |
| 2025-06-05 | CONSYLMAN, GINA | Director | Buy | 3,500 | — | — |
| 2025-06-05 | ALTIG, ANTHONY E | Director | Buy | 3,500 | — | — |
| 2025-03-31 | WHITE, NICOLE S | Chief Manufacturing Officer | Sale | 197 | $9.85 | $1940.08 |
| 2025-03-31 | OKAZAKI, JASON A | Director, CEO and President | Sale | 355 | $9.85 | $3496.08 |
| 2025-03-31 | MCHUTCHISON, JOHN G | Director | Sale | 757 | $9.85 | $7455.01 |
| 2025-03-31 | BJORKQUIST, JEANETTE M | Principal Accounting Officer | Sale | 180 | $9.85 | $1772.66 |
| 2025-03-29 | WHITE, NICOLE S | Chief Manufacturing Officer | Buy | 20,400 | — | — |
| 2025-03-29 | OKAZAKI, JASON A | Director, CEO and President | Buy | 71,100 | — | — |
| 2025-03-29 | GAGGAR, ANUJ | Chief Medical Officer | Buy | 24,200 | — | — |
| 2025-03-29 | DELANEY, WILLIAM E IV | Chief Scientific Officer | Buy | 25,500 | — | — |
| 2025-03-29 | BJORKQUIST, JEANETTE M | Principal Accounting Officer | Buy | 1,900 | — | — |
| 2025-03-29 | BJORKQUIST, JEANETTE M | Principal Accounting Officer | Buy | 1,655 | — | — |
| 2024-12-30 | HOUGHTON, MICHAEL | Director | Buy | 3,202 | $15.61 | $49997.63 |
| 2024-12-19 | GILEAD, SCIENCES, INC. | 10% Owner | Buy | 940,499 | $21.37 | $20.10M |
| 2024-11-25 | SCHORNSTEIN, ALEXANDER | 10% Owner | Buy | 5,000 | $14.85 | $74250.00 |
| 2024-11-25 | SCHORNSTEIN, ALEXANDER | 10% Owner | Buy | 2,976 | $15.00 | $44640.00 |
| 2024-11-22 | SCHORNSTEIN, ALEXANDER | 10% Owner | Buy | 17,024 | $14.87 | $253104.32 |
| 2024-11-18 | WHITE, NICOLE S | Chief Manufacturing Officer | Sale | 40 | $16.29 | $651.60 |
| 2024-10-08 | SCHORNSTEIN, ALEXANDER | 10% Owner | Buy | 10,000 | $14.58 | $145800.00 |
| 2024-10-03 | WHITE, NICOLE S | Chief Manufacturing Officer | Sale | 157 | $14.81 | $2325.17 |
| 2024-10-03 | OKAZAKI, JASON A | Director, CEO and President | Sale | 197 | $14.81 | $2917.57 |
| 2024-08-02 | WHITE, NICOLE S | Chief Manufacturing Officer | Sale | 785 | $14.23 | $11172.51 |
| 2024-08-02 | OKAZAKI, JASON A | Director, CEO and President | Sale | 981 | $14.23 | $13962.08 |
| 2024-07-05 | SCHORNSTEIN, ALEXANDER | 10% Owner | Buy | 4,438 | $12.52 | $55563.76 |
| 2024-07-03 | SCHORNSTEIN, ALEXANDER | 10% Owner | Buy | 4,562 | $12.29 | $56066.98 |
| 2024-06-17 | GILEAD, SCIENCES, INC. | 10% Owner | Buy | 179,500 | — | — |
| 2024-06-17 | GILEAD, SCIENCES, INC. | 10% Owner | Buy | 179,500 | — | — |
| 2024-05-29 | RINGO, WILLIAM R | Director | Buy | 2,750 | — | — |
| 2024-05-29 | MCHUTCHISON, JOHN G | Director | Buy | 2,750 | — | — |
| 2024-05-29 | MAHONY, SUSAN | Director | Buy | 2,750 | — | — |
| 2024-05-29 | JOHNSON-PRATT, LISA | Director | Buy | 2,750 | — | — |
| 2024-05-29 | HOUGHTON, MICHAEL | Director | Buy | 2,750 | — | — |
| 2024-05-29 | CONSYLMAN, GINA | Director | Buy | 2,750 | — | — |
| 2024-05-29 | ALTIG, ANTHONY E | Director | Buy | 2,750 | — | — |
| 2024-05-23 | WHITE, NICOLE S | Chief Manufacturing Officer | Sale | 172 | $14.93 | $2568.61 |
| 2024-05-23 | OKAZAKI, JASON A | Director, CEO and President | Sale | 549 | $14.93 | $8198.66 |
| 2024-05-23 | MCHUTCHISON, JOHN G | Director | Sale | 2,117 | $14.93 | $31614.85 |
| 2024-05-23 | BJORKQUIST, JEANETTE M | Principal Accounting Officer | Sale | 24 | $14.93 | $358.41 |
| 2024-04-30 | WHITE, NICOLE S | Chief Manufacturing Officer | Sale | 1,255 | $12.71 | $15947.03 |
| 2024-04-30 | OKAZAKI, JASON A | Director, CEO and President | Sale | 1,569 | $12.71 | $19936.97 |
| 2024-04-29 | WHITE, NICOLE S | Chief Manufacturing Officer | Buy | 3,333 | — | — |
| 2024-04-29 | OKAZAKI, JASON A | Director, CEO and President | Buy | 4,166 | — | — |
| 2024-04-29 | DELANEY, WILLIAM E IV | Chief Scientific Officer | Buy | 3,333 | — | — |
| 2024-04-01 | WHITE, NICOLE S | Chief Manufacturing Officer | Sale | 197 | $13.07 | $2575.16 |
| 2024-04-01 | OKAZAKI, JASON A | Director, CEO and President | Sale | 354 | $13.07 | $4627.45 |
| 2024-04-01 | MCHUTCHISON, JOHN G | Director | Sale | 1,206 | $13.07 | $15764.71 |
| 2024-04-01 | BJORKQUIST, JEANETTE M | Principal Accounting Officer | Sale | 114 | $13.07 | $1490.20 |
| 2024-03-29 | WHITE, NICOLE S | Chief Manufacturing Officer | Buy | 17,500 | — | — |
| 2024-03-29 | OKAZAKI, JASON A | Director, CEO and President | Buy | 65,000 | — | — |
| 2024-03-29 | DELANEY, WILLIAM E IV | Chief Scientific Officer | Buy | 20,000 | — | — |
| 2024-03-29 | BJORKQUIST, JEANETTE M | Principal Accounting Officer | Buy | 1,550 | — | — |
| 2024-03-29 | BJORKQUIST, JEANETTE M | Principal Accounting Officer | Buy | 850 | — | — |
| 2024-03-27 | OKAZAKI, JASON A | Director, CEO and President | Sale | 392 | $12.87 | $5045.04 |
| 2024-01-18 | SCHORNSTEIN, ALEXANDER | 10% Owner | Buy | 345,086 | $0.80 | $276068.80 |
| 2024-01-17 | SCHORNSTEIN, ALEXANDER | 10% Owner | Buy | 299,994 | $0.78 | $235195.30 |
| 2023-11-21 | SCHORNSTEIN, ALEXANDER | 10% Owner | Buy | 100,000 | $0.67 | $66700.00 |
| 2023-11-20 | SCHORNSTEIN, ALEXANDER | 10% Owner | Buy | 300,000 | $0.72 | $215400.00 |
| 2023-11-17 | WHITE, NICOLE S | Chief Manufacturing Officer | Sale | 477 | $0.69 | $328.65 |
| 2023-11-08 | GAGGAR, ANUJ | Chief Medical Officer | Buy | 500,000 | — | — |
| 2023-10-03 | WHITE, NICOLE S | Chief Manufacturing Officer | Sale | 1,891 | $0.80 | $1503.91 |
| 2023-10-03 | OKAZAKI, JASON A | Director, CEO and President | Sale | 2,363 | $0.80 | $1879.29 |
| 2023-10-03 | DELANEY, WILLIAM E IV | Chief Scientific Officer | Sale | 1,891 | $0.80 | $1503.91 |
| 2023-10-02 | WHITE, NICOLE S | Chief Manufacturing Officer | Buy | 10,000 | — | — |
| 2023-10-02 | OKAZAKI, JASON A | Director, CEO and President | Buy | 12,500 | — | — |
| 2023-10-02 | DELANEY, WILLIAM E IV | Chief Scientific Officer | Buy | 10,000 | — | — |
| 2023-08-02 | OKAZAKI, JASON A | Director, CEO and President | Sale | 11,827 | $1.09 | $12866.59 |
| 2023-08-02 | DELANEY, WILLIAM E IV | Chief Scientific Officer | Sale | 9,461 | $1.09 | $10292.62 |
| 2023-07-24 | BJORKQUIST, JEANETTE M | Principal Accounting Officer | Sale | 844 | $1.07 | $900.38 |
| 2023-06-22 | OKAZAKI, JASON A | Director, CEO and President | Buy | 50,000 | — | — |
| 2023-06-22 | DELANEY, WILLIAM E IV | Chief Scientific Officer | Buy | 40,000 | — | — |
| 2023-05-30 | DELANEY, WILLIAM E IV | Chief Scientific Officer | Sale | 4,232 | $0.96 | $4046.22 |
| 2023-05-25 | RINGO, WILLIAM R | Director | Buy | 20,000 | — | — |
| 2023-05-25 | MCHUTCHISON, JOHN G | Director | Buy | 20,000 | — | — |
| 2023-05-25 | MAHONY, SUSAN | Director | Buy | 20,000 | — | — |
| 2023-05-25 | JOHNSON-PRATT, LISA | Director | Buy | 20,000 | — | — |
| 2023-05-25 | HOUGHTON, MICHAEL | Director | Buy | 20,000 | — | — |
| 2023-05-25 | CONSYLMAN, GINA | Director | Buy | 20,000 | — | — |
| 2023-05-25 | ALTIG, ANTHONY E | Director | Buy | 20,000 | — | — |
| 2023-05-23 | OKAZAKI, JASON A | Director, CEO and President | Sale | 6,561 | $1.04 | $6825.41 |
| 2023-05-23 | MCHUTCHISON, JOHN G | Director | Sale | 25,972 | $1.04 | $27018.67 |
| 2023-05-23 | DELANEY, WILLIAM E IV | Chief Scientific Officer | Sale | 6,561 | $1.04 | $6825.41 |
| 2023-05-23 | BJORKQUIST, JEANETTE M | Principal Accounting Officer | Sale | 274 | $1.04 | $285.04 |
| 2023-05-22 | OKAZAKI, JASON A | Director, CEO and President | Buy | 35,000 | — | — |
| 2023-05-22 | MCHUTCHISON, JOHN G | Director | Buy | 117,500 | — | — |
| 2023-05-22 | DELANEY, WILLIAM E IV | Chief Scientific Officer | Buy | 35,000 | — | — |
| 2023-05-22 | BJORKQUIST, JEANETTE M | Principal Accounting Officer | Buy | 1,500 | — | — |
| 2023-03-30 | OKAZAKI, JASON A | Director, CEO and President | Sale | 4,247 | $0.82 | $3496.13 |
| 2023-03-30 | MCHUTCHISON, JOHN G | Director | Sale | 14,883 | $0.82 | $12251.69 |
| 2023-03-30 | DELANEY, WILLIAM E IV | Chief Scientific Officer | Sale | 3,421 | $0.82 | $2816.17 |
| 2023-03-30 | BJORKQUIST, JEANETTE M | Principal Accounting Officer | Sale | 774 | $0.82 | $637.16 |