Insider trading activities (stock purchases, sales, and option exercises) reported by insiders of Assembly Biosciences, Inc. (ASMB) since 2013 are shown in Table 1 and Table 2. Table 1 shows the monthly insider trading data of Assembly Biosciences, Inc.. Table 2 shows the detailed insider transactions. This company's CIK number is 1426800.
Total stock buying since 2013: $1,690,675.
Total stock sales since 2013: $2,766,940.
Total stock option exercises since 2013: $340,418.
| Insider Buying | Insider Sales | Option Exercises | ||||
|---|---|---|---|---|---|---|
| Year | Shares | Value | Shares | Value | Shares | Value |
| 2025 | 0 | $0 | 1,489 | $14,662 | 0 | $0 |
| 2024 | 871,782 | $1,190,844 | 9,037 | $123,669 | 0 | $0 |
| 2023 | 400,000 | $282,100 | 99,895 | $97,910 | 0 | $0 |
| 2022 | 0 | $0 | 21,045 | $45,042 | 0 | $0 |
| 2021 | 0 | $0 | 16,285 | $60,420 | 0 | $0 |
| 2020 | 0 | $0 | 26,911 | $434,615 | 0 | $0 |
| 2019 | 0 | $0 | 34,521 | $857,252 | 33,061 | $232,418 |
| 2018 | 2,400 | $99,551 | 22,540 | $944,608 | 7,000 | $50,400 |
| 2017 | 0 | $0 | 6,461 | $188,762 | 8,000 | $57,600 |
| 2014 | 89,980 | $79,987 | 0 | $0 | 0 | $0 |
| 2013 | 15,000 | $38,193 | 0 | $0 | 0 | $0 |
| Trading Period | Insider Buying | Insider Sales | Option Exercises | |||
|---|---|---|---|---|---|---|
| year-month | Shares | Value | Shares | Value | Shares | Value |
| 2025-03 | 0 | $0 | 1,489 | $14,662 | 0 | $0 |
| 2024-12 | 3,202 | $49,999 | 0 | $0 | 0 | $0 |
| 2024-11 | 25,000 | $372,153 | 0 | $0 | 0 | $0 |
| 2024-10 | 10,000 | $145,800 | 354 | $5,242 | 0 | $0 |
| 2024-08 | 0 | $0 | 1,766 | $25,134 | 0 | $0 |
| 2024-07 | 9,000 | $111,629 | 0 | $0 | 0 | $0 |
| 2024-06 | 179,500 | $0 | 0 | $0 | 0 | $0 |
| 2024-05 | 0 | $0 | 2,141 | $31,973 | 0 | $0 |
| 2024-04 | 0 | $0 | 4,384 | $56,275 | 0 | $0 |
| 2024-03 | 0 | $0 | 392 | $5,045 | 0 | $0 |
| 2024-01 | 645,080 | $511,263 | 0 | $0 | 0 | $0 |
| 2023-11 | 400,000 | $282,100 | 0 | $0 | 0 | $0 |
| 2023-10 | 0 | $0 | 6,145 | $4,884 | 0 | $0 |
| 2023-08 | 0 | $0 | 21,288 | $23,160 | 0 | $0 |
| 2023-07 | 0 | $0 | 844 | $900 | 0 | $0 |
| 2023-05 | 0 | $0 | 43,600 | $44,985 | 0 | $0 |
| 2023-03 | 0 | $0 | 28,018 | $23,981 | 0 | $0 |
| 2022-07 | 0 | $0 | 2,020 | $4,478 | 0 | $0 |
| 2022-05 | 0 | $0 | 4,164 | $8,003 | 0 | $0 |
| 2022-03 | 0 | $0 | 14,861 | $32,561 | 0 | $0 |
| 2021-08 | 0 | $0 | 12,156 | $43,785 | 0 | $0 |
| 2021-05 | 0 | $0 | 4,129 | $16,635 | 0 | $0 |
| 2020-12 | 0 | $0 | 1,297 | $7,983 | 0 | $0 |
| 2020-11 | 0 | $0 | 4,397 | $22,402 | 0 | $0 |
| Trade Date | Insider Name | Trade Type | Shares | Price ($) | Value ($) |
|---|---|---|---|---|---|
| 2025-03-31 | White Nicole S (Chief Manufacturing Officer) | Sale | 197 | 9.85 | 1,940 |
| 2025-03-31 | Bjorkquist Jeanette M (Principal Accounting Officer) | Sale | 180 | 9.85 | 1,772 |
| 2025-03-31 | Okazaki Jason A (CEO and President) | Sale | 355 | 9.85 | 3,496 |
| 2025-03-31 | Mchutchison John G | Sale | 757 | 9.85 | 7,454 |
| 2024-12-30 | Houghton Michael | Buy | 3,202 | 15.62 | 49,999 |
| 2024-11-25 | Schornstein Alexander | Buy | 7,976 | 14.93 | 119,041 |
| 2024-11-22 | Schornstein Alexander | Buy | 17,024 | 14.87 | 253,112 |
| 2024-10-08 | Schornstein Alexander | Buy | 10,000 | 14.58 | 145,800 |
| 2024-10-03 | White Nicole S (Chief Manufacturing Officer) | Sale | 157 | 14.81 | 2,325 |
| 2024-10-03 | Okazaki Jason A (CEO and President) | Sale | 197 | 14.81 | 2,917 |
| 2024-08-02 | White Nicole S (Chief Manufacturing Officer) | Sale | 785 | 14.23 | 11,172 |
| 2024-08-02 | Okazaki Jason A (CEO and President) | Sale | 981 | 14.23 | 13,962 |
| 2024-07-05 | Schornstein Alexander | Buy | 4,438 | 12.52 | 55,563 |
| 2024-07-03 | Schornstein Alexander | Buy | 4,562 | 12.29 | 56,066 |
| 2024-06-17 | Gilead Sciences, Inc. | Buy | 179,500 | .00 | 0 |
| 2024-05-23 | Bjorkquist Jeanette M (Principal Accounting Officer) | Sale | 24 | 14.93 | 358 |
| 2024-05-23 | Mchutchison John G | Sale | 2,117 | 14.93 | 31,615 |
| 2024-04-30 | White Nicole S (Chief Manufacturing Officer) | Sale | 1,255 | 12.71 | 15,947 |
| 2024-04-30 | Okazaki Jason A (CEO and President) | Sale | 1,569 | 12.71 | 19,937 |
| 2024-04-01 | Okazaki Jason A (CEO and President) | Sale | 354 | 13.07 | 4,627 |
| 2024-04-01 | Mchutchison John G | Sale | 1,206 | 13.07 | 15,764 |
| 2024-03-27 | Okazaki Jason A (CEO and President) | Sale | 392 | 12.87 | 5,045 |
| 2024-01-18 | Schornstein Alexander | Buy | 345,086 | .80 | 276,068 |
| 2024-01-17 | Schornstein Alexander | Buy | 299,994 | .78 | 235,195 |
| 2023-11-21 | Schornstein Alexander | Buy | 100,000 | .67 | 66,700 |
| 2023-11-20 | Schornstein Alexander | Buy | 300,000 | .72 | 215,400 |
| 2023-10-03 | White Nicole S (Chief Manufacturing Officer) | Sale | 1,891 | .80 | 1,503 |
| 2023-10-03 | Delaney William E Iv (Chief Scientific Officer) | Sale | 1,891 | .80 | 1,503 |
| 2023-10-03 | Okazaki Jason A (CEO and President) | Sale | 2,363 | .80 | 1,878 |
| 2023-08-02 | Delaney William E Iv (Chief Scientific Officer) | Sale | 9,461 | 1.09 | 10,293 |
| 2023-08-02 | Okazaki Jason A (CEO and President) | Sale | 11,827 | 1.09 | 12,867 |
| 2023-07-24 | Bjorkquist Jeanette M (Principal Accounting Officer) | Sale | 844 | 1.07 | 900 |
| 2023-05-30 | Delaney William E Iv (Chief Scientific Officer) | Sale | 4,232 | .96 | 4,045 |
| 2023-05-23 | Bjorkquist Jeanette M (Principal Accounting Officer) | Sale | 274 | 1.04 | 284 |
| 2023-05-23 | Delaney William E Iv (Chief Scientific Officer) | Sale | 6,561 | 1.04 | 6,823 |
| 2023-05-23 | Okazaki Jason A (CEO and President) | Sale | 6,561 | 1.04 | 6,823 |
| 2023-05-23 | Mchutchison John G (Director) | Sale | 25,972 | 1.04 | 27,010 |
| 2023-03-30 | Bjorkquist Jeanette M (Principal Accounting Officer) | Sale | 774 | .82 | 637 |
| 2023-03-30 | Delaney William E Iv (Chief Scientific Officer) | Sale | 3,421 | .82 | 2,815 |
| 2023-03-30 | Okazaki Jason A (CEO and President) | Sale | 4,247 | .82 | 3,495 |
| 2023-03-30 | Mchutchison John G (Director) | Sale | 14,883 | .82 | 12,248 |
| 2023-03-27 | Okazaki Jason A (CEO and President) | Sale | 4,693 | 1.02 | 4,786 |
| 2022-07-25 | Samar Michael P. (Chief Financial Officer) | Sale | 2,020 | 2.22 | 4,478 |
| 2022-05-31 | Delaney William E Iv (Chief Scientific Officer) | Sale | 4,164 | 1.92 | 8,003 |
| 2022-03-30 | Delaney William E Iv (Chief Scientific Officer) | Sale | 1,038 | 2.17 | 2,249 |
| 2022-03-30 | Okazaki Jason A (Chief Operating Officer) | Sale | 1,269 | 2.17 | 2,749 |
| 2022-03-30 | Stamm Luisa M (Chief Medical Officer) | Sale | 1,038 | 2.17 | 2,249 |
| 2022-03-30 | Samar Michael P. (Chief Financial Officer) | Sale | 2,285 | 2.17 | 4,951 |
| 2022-03-30 | Mchutchison John G (CEO and President) | Sale | 4,614 | 2.17 | 9,998 |
| 2022-03-28 | Okazaki Jason A (Chief Operating Officer) | Sale | 4,617 | 2.25 | 10,365 |
| 2021-08-09 | Mchutchison John G (CEO and President) | Sale | 12,156 | 3.60 | 43,785 |
| 2021-05-27 | Delaney William E Iv (Chief Scientific Officer) | Sale | 4,129 | 4.03 | 16,635 |
| 2020-12-14 | Papkoff Jacqueline Sybil (SVP-CSO Microbiome) | Sale | 1,297 | 6.16 | 7,983 |
| 2020-11-09 | Stamm Luisa M (Chief Medical Officer) | Sale | 4,397 | 5.09 | 22,402 |
| 2020-08-07 | Mchutchison John G (CEO and President) | Sale | 12,151 | 22.13 | 268,877 |
| 2020-03-31 | Colonno Richard James (EVP & CSO, Virology Ops) | Sale | 7,812 | 15.04 | 117,523 |
| 2020-03-30 | Papkoff Jacqueline Sybil (SVP-CSO Microbiome) | Sale | 1,254 | 14.22 | 17,830 |
| 2019-12-13 | Papkoff Jacqueline Sybil (SVP-CSO Microbiome) | Sale | 1,460 | 21.00 | 30,661 |
| 2019-12-12 | Colonno Richard James (EVP & CSO, Virology Ops) | Sale | 33,061 | 25.00 | 826,591 |
| 2019-12-12 | Colonno Richard James (EVP & CSO, Virology Ops) | Option Ex | 33,061 | 7.03 | 232,418 |
| 2018-09-06 | Lopatin Uri A (Chief Med. Off., VP Res. Dev.) | Sale | 336 | 40.01 | 13,442 |
| 2018-09-05 | Lopatin Uri A (Chief Med. Off., VP Res. Dev.) | Sale | 15,204 | 40.09 | 609,543 |
| 2018-07-19 | Small Derek A (CEO and President) | Buy | 2,400 | 41.48 | 99,551 |
| 2018-07-02 | Ringo William R | Sale | 1,000 | 38.50 | 38,503 |
| 2018-07-02 | Ringo William R | Option Ex | 1,000 | 7.20 | 7,200 |
| 2018-06-01 | Ringo William R | Sale | 1,000 | 42.47 | 42,470 |
| 2018-06-01 | Ringo William R | Option Ex | 1,000 | 7.20 | 7,200 |
| 2018-05-01 | Ringo William R | Sale | 1,000 | 43.06 | 43,060 |
| 2018-05-01 | Ringo William R | Option Ex | 1,000 | 7.20 | 7,200 |
| 2018-04-02 | Ringo William R | Sale | 1,000 | 49.32 | 49,320 |
| 2018-04-02 | Ringo William R | Option Ex | 1,000 | 7.20 | 7,200 |
| 2018-03-01 | Ringo William R | Sale | 1,000 | 56.37 | 56,370 |
| 2018-03-01 | Ringo William R | Option Ex | 1,000 | 7.20 | 7,200 |
| 2018-02-01 | Ringo William R | Sale | 1,000 | 46.86 | 46,860 |
| 2018-02-01 | Ringo William R | Option Ex | 1,000 | 7.20 | 7,200 |
| 2018-01-02 | Ringo William R | Sale | 1,000 | 45.04 | 45,040 |
| 2018-01-02 | Ringo William R | Option Ex | 1,000 | 7.20 | 7,200 |
| 2017-12-01 | Ringo William R | Sale | 1,000 | 49.37 | 49,370 |
| 2017-12-01 | Ringo William R | Option Ex | 1,000 | 7.20 | 7,200 |
| 2017-11-01 | Ringo William R | Sale | 1,000 | 29.55 | 29,550 |
| 2017-11-01 | Ringo William R | Option Ex | 1,000 | 7.20 | 7,200 |
| 2017-10-16 | Ringo William R | Sale | 1,000 | 33.70 | 33,700 |
| 2017-10-16 | Ringo William R | Option Ex | 1,000 | 7.20 | 7,200 |
| 2017-05-12 | Ringo William R | Sale | 3,461 | 22.00 | 76,142 |
| 2017-05-10 | Ringo William R | Option Ex | 5,000 | 7.20 | 36,000 |
| 2014-05-27 | Ellison Russell H (Chief Executive Officer) | Buy | 13,000 | .92 | 11,960 |
| 2014-05-23 | Ellison Russell H (Chief Executive Officer) | Buy | 15,000 | .91 | 13,605 |
| 2014-05-23 | Barrett David Jonathan (Chief Financial Officer) | Buy | 1,000 | .88 | 880 |
| 2014-05-22 | Ellison Russell H (Chief Executive Officer) | Buy | 5,000 | .90 | 4,500 |
| 2014-05-22 | Barrett David Jonathan (Chief Financial Officer) | Buy | 5,980 | .86 | 5,142 |
| 2014-05-21 | Ellison Russell H (Chief Executive Officer) | Buy | 10,000 | .87 | 8,700 |
| 2014-05-20 | Barrett David Jonathan (Chief Financial Officer) | Buy | 40,000 | .88 | 35,200 |
| 2013-02-05 | Ellison Russell H (Chief Executive Officer) | Buy | 5,624 | 2.59 | 14,566 |
| 2013-02-04 | Ellison Russell H (Chief Executive Officer) | Buy | 9,376 | 2.52 | 23,627 |
Insider trading activities including stock purchases, stock sales, and option exercises of ASMB listed in the above tables cannot be completely guaranteed as to their accuracy. For more insider trading information of Assembly Biosciences, Inc. (symbol ASMB, CIK number 1426800) see the Securities and Exchange Commission (SEC) website.