Insider trading activities (stock purchases, sales, and option exercises) reported by insiders of Merrimack Pharmaceuticals Inc (MACK) since 2014 are shown in Table 1 and Table 2. Table 1 shows the monthly insider trading data of Merrimack Pharmaceuticals Inc. Table 2 shows the detailed insider transactions. This company's CIK number is 1274792.
Total stock buying since 2014: $17,885,283.
Total stock sales since 2014: $14,549,189.
Total stock option exercises since 2014: $4,840,824.
| Insider Buying | Insider Sales | Option Exercises | ||||
|---|---|---|---|---|---|---|
| Year | Shares | Value | Shares | Value | Shares | Value |
| 2023 | 663,979 | $8,034,506 | 0 | $0 | 0 | $0 |
| 2022 | 311,313 | $1,460,406 | 0 | $0 | 0 | $0 |
| 2021 | 112,407 | $738,257 | 1,000 | $3,840 | 0 | $0 |
| 2020 | 652,561 | $2,157,539 | 193,509 | $606,263 | 0 | $0 |
| 2019 | 241,001 | $1,426,815 | 0 | $0 | 0 | $0 |
| 2017 | 0 | $0 | 33,549 | $438,004 | 118,549 | $628,436 |
| 2016 | 57,000 | $374,539 | 54,000 | $307,000 | 84,000 | $187,340 |
| 2015 | 177,474 | $1,844,864 | 728,987 | $8,525,680 | 1,220,056 | $2,498,011 |
| 2014 | 242,989 | $1,848,357 | 518,282 | $4,668,402 | 1,056,529 | $1,527,037 |
| Trading Period | Insider Buying | Insider Sales | Option Exercises | |||
|---|---|---|---|---|---|---|
| year-month | Shares | Value | Shares | Value | Shares | Value |
| 2023-12 | 150,600 | $1,950,244 | 0 | $0 | 0 | $0 |
| 2023-11 | 74,268 | $920,190 | 0 | $0 | 0 | $0 |
| 2023-08 | 225,550 | $2,708,694 | 0 | $0 | 0 | $0 |
| 2023-03 | 160,590 | $1,849,996 | 0 | $0 | 0 | $0 |
| 2023-01 | 52,971 | $605,382 | 0 | $0 | 0 | $0 |
| 2022-07 | 9,089 | $53,755 | 0 | $0 | 0 | $0 |
| 2022-06 | 33,409 | $176,216 | 0 | $0 | 0 | $0 |
| 2022-05 | 8,192 | $41,627 | 0 | $0 | 0 | $0 |
| 2022-04 | 5,000 | $30,000 | 0 | $0 | 0 | $0 |
| 2022-03 | 20,510 | $125,195 | 0 | $0 | 0 | $0 |
| 2022-02 | 18,219 | $111,314 | 0 | $0 | 0 | $0 |
| 2022-01 | 216,894 | $922,299 | 0 | $0 | 0 | $0 |
| 2021-12 | 0 | $0 | 1,000 | $3,840 | 0 | $0 |
| 2021-04 | 82,976 | $531,937 | 0 | $0 | 0 | $0 |
| 2021-03 | 14,327 | $93,420 | 0 | $0 | 0 | $0 |
| 2021-02 | 15,104 | $112,900 | 0 | $0 | 0 | $0 |
| 2020-12 | 29,776 | $119,074 | 0 | $0 | 0 | $0 |
| 2020-11 | 182,067 | $664,261 | 0 | $0 | 0 | $0 |
| 2020-08 | 33,289 | $115,149 | 0 | $0 | 0 | $0 |
| 2020-07 | 354,548 | $1,106,898 | 193,509 | $606,263 | 0 | $0 |
| 2020-04 | 52,881 | $152,157 | 0 | $0 | 0 | $0 |
| 2019-07 | 30,526 | $179,242 | 0 | $0 | 0 | $0 |
| 2019-06 | 23,564 | $140,087 | 0 | $0 | 0 | $0 |
| 2019-04 | 186,911 | $1,107,486 | 0 | $0 | 0 | $0 |
| Trade Date | Insider Name | Trade Type | Shares | Price ($) | Value ($) |
|---|---|---|---|---|---|
| 2023-12-28 | Western Standard Partners Qp, L.p. | Buy | 857 | 13.35 | 11,440 |
| 2023-12-26 | Western Standard Partners Qp, L.p. | Buy | 48,693 | 13.15 | 640,312 |
| 2023-12-07 | Western Standard Partners Qp, L.p. | Buy | 101,050 | 12.85 | 1,298,492 |
| 2023-11-17 | Western Standard Partners Qp, L.p. | Buy | 300 | 12.50 | 3,750 |
| 2023-11-14 | Western Standard Partners Qp, L.p. | Buy | 50,170 | 12.50 | 627,125 |
| 2023-11-09 | Western Standard Partners Qp, L.p. | Buy | 9,975 | 12.19 | 121,615 |
| 2023-11-08 | Western Standard Partners Qp, L.p. | Buy | 13,823 | 12.13 | 167,700 |
| 2023-08-11 | Crocker Gary L (See Remarks) | Buy | 2,000 | 12.43 | 24,866 |
| 2023-08-10 | Crocker Gary L (See Remarks) | Buy | 2,000 | 12.52 | 25,040 |
| 2023-08-08 | Western Standard Partners Qp, L.p. | Buy | 87,057 | 12.00 | 1,044,335 |
| 2023-08-07 | Western Standard Partners Qp, L.p. | Buy | 134,493 | 12.00 | 1,614,453 |
| 2023-03-21 | Western Standard Partners Qp, L.p. | Buy | 160,590 | 11.52 | 1,849,996 |
| 2023-01-31 | Western Standard Partners Qp, L.p. (Other) | Buy | 2,232 | 11.40 | 25,444 |
| 2023-01-30 | Western Standard Partners Qp, L.p. (Other) | Buy | 24,708 | 11.36 | 280,633 |
| 2023-01-27 | Western Standard Partners Qp, L.p. (Other) | Buy | 21,875 | 11.40 | 249,309 |
| 2023-01-06 | Radeljevic Ana (Director) | Buy | 4,156 | 12.03 | 49,996 |
| 2022-07-13 | Ledo Capital, Llc (Other) | Buy | 3,095 | 5.89 | 18,226 |
| 2022-07-12 | Ledo Capital, Llc (Other) | Buy | 2,816 | 5.87 | 16,515 |
| 2022-07-11 | Ledo Capital, Llc (Other) | Buy | 700 | 5.97 | 4,181 |
| 2022-07-08 | Ledo Capital, Llc (Other) | Buy | 1,378 | 5.99 | 8,248 |
| 2022-07-07 | Ledo Capital, Llc (Other) | Buy | 1,100 | 5.99 | 6,585 |
| 2022-06-30 | Ledo Capital, Llc (Other) | Buy | 1,550 | 5.76 | 8,921 |
| 2022-06-24 | Ledo Capital, Llc (Other) | Buy | 1,000 | 5.99 | 5,990 |
| 2022-06-23 | Ledo Capital, Llc (Other) | Buy | 500 | 6.00 | 3,000 |
| 2022-06-17 | Ledo Capital, Llc (Other) | Buy | 900 | 5.97 | 5,372 |
| 2022-06-16 | Ledo Capital, Llc (Other) | Buy | 520 | 5.45 | 2,832 |
| 2022-06-15 | Ledo Capital, Llc (Other) | Buy | 2,900 | 5.37 | 15,561 |
| 2022-06-14 | Ledo Capital, Llc (Other) | Buy | 20,938 | 5.17 | 108,312 |
| 2022-06-09 | Crocker Gary L (See Remarks) | Buy | 4,452 | 5.15 | 22,918 |
| 2022-06-08 | Crocker Gary L (See Remarks) | Buy | 349 | 5.14 | 1,795 |
| 2022-06-07 | Crocker Gary L (See Remarks) | Buy | 300 | 5.05 | 1,515 |
| 2022-05-25 | Crocker Gary L (See Remarks) | Buy | 132 | 5.13 | 677 |
| 2022-05-24 | Crocker Gary L (See Remarks) | Buy | 2,323 | 5.09 | 11,817 |
| 2022-05-19 | Crocker Gary L (See Remarks) | Buy | 512 | 5.04 | 2,582 |
| 2022-05-18 | Crocker Gary L (See Remarks) | Buy | 5,000 | 5.08 | 25,405 |
| 2022-05-17 | Crocker Gary L (See Remarks) | Buy | 225 | 5.10 | 1,146 |
| 2022-04-21 | Crocker Gary L (See Remarks) | Buy | 5,000 | 6.00 | 30,000 |
| 2022-03-31 | Crocker Gary L (See Remarks) | Buy | 300 | 6.18 | 1,853 |
| 2022-03-30 | Crocker Gary L (See Remarks) | Buy | 161 | 6.20 | 998 |
| 2022-03-28 | Crocker Gary L (See Remarks) | Buy | 5,000 | 6.16 | 30,820 |
| 2022-03-22 | Crocker Gary L (See Remarks) | Buy | 400 | 6.11 | 2,445 |
| 2022-03-15 | Crocker Gary L (See Remarks) | Buy | 4,649 | 6.14 | 28,554 |
| 2022-03-14 | Crocker Gary L (See Remarks) | Buy | 5,000 | 6.02 | 30,120 |
| 2022-03-11 | Crocker Gary L (See Remarks) | Buy | 5,000 | 6.08 | 30,405 |
| 2022-02-18 | Crocker Gary L (See Remarks) | Buy | 3,351 | 5.96 | 19,968 |
| 2022-02-17 | Crocker Gary L (See Remarks) | Buy | 5,000 | 6.12 | 30,625 |
| 2022-02-16 | Crocker Gary L (See Remarks) | Buy | 7,945 | 6.20 | 49,235 |
| 2022-02-15 | Crocker Gary L (See Remarks) | Buy | 123 | 6.20 | 762 |
| 2022-02-14 | Crocker Gary L (See Remarks) | Buy | 1,800 | 5.96 | 10,724 |
| 2022-01-31 | Ledo Capital, Llc (Other) | Buy | 1,237 | 5.05 | 6,245 |
| 2022-01-28 | Ledo Capital, Llc (Other) | Buy | 12,963 | 4.48 | 58,035 |
| 2022-01-27 | Ledo Capital, Llc (Other) | Buy | 16,272 | 4.82 | 78,479 |
| 2022-01-27 | Crocker Gary L (See Remarks) | Buy | 673 | 4.60 | 3,095 |
| 2022-01-26 | Ledo Capital, Llc (Other) | Buy | 19,528 | 5.01 | 97,776 |
| 2022-01-26 | Crocker Gary L (See Remarks) | Buy | 3,100 | 4.55 | 14,120 |
| 2022-01-24 | Nielsen Ulrik B. (Director) | Buy | 14,287 | 4.24 | 60,634 |
| 2022-01-24 | Crocker Gary L (See Remarks) | Buy | 7,105 | 4.33 | 30,743 |
| 2022-01-21 | Crocker Gary L (See Remarks) | Buy | 2,000 | 4.66 | 9,310 |
| 2022-01-18 | Crocker Gary L (See Remarks) | Buy | 5,000 | 4.54 | 22,690 |
| 2022-01-14 | Crocker Gary L (See Remarks) | Buy | 5,000 | 4.51 | 22,555 |
| 2022-01-13 | Crocker Gary L (See Remarks) | Buy | 5,000 | 4.42 | 22,120 |
| 2022-01-12 | Crocker Gary L (See Remarks) | Buy | 5,000 | 4.33 | 21,660 |
| 2022-01-11 | Ledo Capital, Llc (Other) | Buy | 91,270 | 4.00 | 364,897 |
| 2022-01-11 | Crocker Gary L (See Remarks) | Buy | 5,000 | 4.03 | 20,139 |
| 2022-01-10 | Ledo Capital, Llc (Other) | Buy | 14,679 | 3.83 | 56,279 |
| 2022-01-07 | Ledo Capital, Llc (Other) | Buy | 8,780 | 3.82 | 33,522 |
| 2021-12-31 | Ray Russell T (Director) | Sale | 1,000 | 3.84 | 3,840 |
| 2021-04-14 | Western Standard Partners Qp, L.p. (Other) | Buy | 47,300 | 6.63 | 313,740 |
| 2021-04-13 | Western Standard Partners Qp, L.p. (Other) | Buy | 9,874 | 6.26 | 61,781 |
| 2021-04-12 | Western Standard Partners Qp, L.p. (Other) | Buy | 23,629 | 6.06 | 143,191 |
| 2021-04-12 | Crocker Gary L (See Remarks) | Buy | 973 | 6.07 | 5,905 |
| 2021-04-09 | Crocker Gary L (See Remarks) | Buy | 1,200 | 6.10 | 7,320 |
| 2021-03-31 | Crocker Gary L (See Remarks) | Buy | 500 | 6.19 | 3,094 |
| 2021-03-25 | Crocker Gary L (See Remarks) | Buy | 200 | 6.13 | 1,226 |
| 2021-03-24 | Crocker Gary L (See Remarks) | Buy | 5,000 | 6.34 | 31,690 |
| 2021-03-23 | Crocker Gary L (See Remarks) | Buy | 3,627 | 6.47 | 23,455 |
| 2021-03-16 | Crocker Gary L (See Remarks) | Buy | 5,000 | 6.79 | 33,955 |
| 2021-02-23 | Crocker Gary L (See Remarks) | Buy | 5,000 | 7.20 | 36,005 |
| 2021-02-12 | Crocker Gary L (See Remarks) | Buy | 5,000 | 7.47 | 37,340 |
| 2021-02-11 | Crocker Gary L (See Remarks) | Buy | 1,604 | 7.98 | 12,798 |
| 2021-02-10 | Crocker Gary L (See Remarks) | Buy | 3,500 | 7.64 | 26,757 |
| 2020-12-01 | Ledo Capital, Llc (Other) | Buy | 29,776 | 4.00 | 119,074 |
| 2020-11-24 | Ledo Capital, Llc (Other) | Buy | 69,087 | 3.65 | 252,167 |
| 2020-11-12 | Ledo Capital, Llc (Other) | Buy | 56,490 | 3.65 | 205,906 |
| 2020-11-12 | Western Standard Partners Qp, L.p. (Other) | Buy | 56,490 | 3.65 | 206,188 |
| 2020-08-13 | Ledo Capital, Llc (Other) | Buy | 608 | 3.50 | 2,128 |
| 2020-08-13 | Western Standard Partners Qp, L.p. (Other) | Buy | 609 | 3.50 | 2,131 |
| 2020-08-12 | Ledo Capital, Llc (Other) | Buy | 2,000 | 3.49 | 6,986 |
| 2020-08-12 | Western Standard Partners Qp, L.p. (Other) | Buy | 2,000 | 3.49 | 6,986 |
| 2020-08-11 | Ledo Capital, Llc (Other) | Buy | 14,042 | 3.45 | 48,487 |
| 2020-08-11 | Western Standard Partners Qp, L.p. (Other) | Buy | 14,030 | 3.45 | 48,431 |
| 2020-07-22 | Ledo Capital, Llc (Other) | Buy | 177,274 | 3.12 | 553,449 |
| 2020-07-22 | Western Standard Partners Qp, L.p. (Other) | Buy | 177,274 | 3.12 | 553,449 |
| 2020-07-22 | Crocker Gary L (See Remarks) | Sale | 193,509 | 3.13 | 606,263 |
| 2020-04-21 | Ledo Capital, Llc (Other) | Buy | 1,424 | 3.25 | 4,628 |
| 2020-04-21 | Western Standard Partners Qp, L.p. (Other) | Buy | 1,424 | 3.25 | 4,628 |
| 2020-04-20 | Ledo Capital, Llc (Other) | Buy | 2,325 | 3.25 | 7,556 |
| 2020-04-20 | Western Standard Partners Qp, L.p. (Other) | Buy | 2,325 | 3.25 | 7,556 |
| 2020-04-07 | Ledo Capital, Llc (Other) | Buy | 5,899 | 3.03 | 17,885 |
| 2020-04-07 | Western Standard Partners Qp, L.p. (Other) | Buy | 5,899 | 3.03 | 17,885 |
| 2020-04-06 | Ledo Capital, Llc (Other) | Buy | 6,042 | 3.00 | 18,107 |
| 2020-04-06 | Western Standard Partners Qp, L.p. (Other) | Buy | 6,043 | 3.00 | 18,110 |
| 2020-04-03 | Ledo Capital, Llc (Other) | Buy | 10,750 | 2.59 | 27,874 |
| 2020-04-03 | Western Standard Partners Qp, L.p. (Other) | Buy | 10,750 | 2.60 | 27,928 |
| 2019-07-16 | Aryeh Jason | Buy | 302 | 5.44 | 1,642 |
| 2019-07-12 | Aryeh Jason | Buy | 3,400 | 5.67 | 19,261 |
| 2019-07-11 | Aryeh Jason | Buy | 100 | 5.71 | 571 |
| 2019-07-02 | Lawler Joseph F. | Buy | 17,131 | 5.85 | 100,182 |
| 2019-07-01 | Lawler Joseph F. | Buy | 9,593 | 6.00 | 57,586 |
| 2019-06-28 | Lawler Joseph F. | Buy | 23,564 | 5.95 | 140,087 |
| 2019-04-17 | English Aron R. | Buy | 16,200 | 6.00 | 97,151 |
| 2019-04-16 | English Aron R. | Buy | 20,450 | 5.95 | 121,636 |
| 2019-04-15 | English Aron R. | Buy | 30,110 | 5.73 | 172,530 |
| 2019-04-08 | English Aron R. | Buy | 32,873 | 5.81 | 191,025 |
| 2019-04-08 | Lawler Joseph F. | Buy | 10,990 | 5.73 | 62,928 |
| 2019-04-05 | English Aron R. | Buy | 50,000 | 6.12 | 305,750 |
| 2019-04-05 | Lawler Joseph F. | Buy | 26,288 | 5.95 | 156,466 |
| 2017-09-15 | Nielsen Ulrik B. (Director) | Sale | 7,796 | 14.23 | 110,937 |
| 2017-09-15 | Nielsen Ulrik B. (Director) | Option Ex | 7,796 | 13.20 | 102,907 |
| 2017-09-14 | Nielsen Ulrik B. (Director) | Sale | 100 | 14.20 | 1,420 |
| 2017-09-14 | Nielsen Ulrik B. (Director) | Option Ex | 100 | 13.20 | 1,320 |
| 2017-09-13 | Nielsen Ulrik B. (Director) | Sale | 6,800 | 14.27 | 97,036 |
| 2017-09-13 | Nielsen Ulrik B. (Director) | Option Ex | 6,800 | 13.20 | 89,760 |
| 2017-09-11 | Nielsen Ulrik B. (Director) | Sale | 14,756 | 14.46 | 213,371 |
| 2017-09-11 | Nielsen Ulrik B. (Director) | Option Ex | 14,756 | 13.20 | 194,779 |
| 2017-05-12 | Drummond Daryl C (Head of Research) | Sale | 4,097 | 3.72 | 15,240 |
| 2017-05-12 | Drummond Daryl C (Head of Research) | Option Ex | 4,097 | 2.69 | 11,020 |
| 2017-03-10 | Porter Michael E (Director) | Option Ex | 85,000 | 2.69 | 228,650 |
| 2016-07-26 | Stewart Edward J. (Head of Commercial) | Option Ex | 30,000 | 2.47 | 74,100 |
| 2016-07-25 | Schoeberl Birgit M. (Head of Discovery) | Sale | 50,000 | 5.50 | 275,000 |
| 2016-07-25 | Schoeberl Birgit M. (Head of Discovery) | Option Ex | 50,000 | 2.12 | 106,000 |
| 2016-03-17 | Porter Michael E (Director) | Buy | 5,000 | 7.20 | 36,000 |
| 2016-03-15 | Porter Michael E (Director) | Buy | 5,000 | 7.65 | 38,250 |
| 2016-03-08 | Porter Michael E (Director) | Buy | 10,000 | 7.09 | 70,900 |
| 2016-03-03 | Porter Michael E (Director) | Buy | 10,000 | 6.27 | 62,699 |
| 2016-03-02 | Porter Michael E (Director) | Buy | 5,000 | 6.63 | 33,150 |
| 2016-03-01 | Porter Michael E (Director) | Buy | 10,000 | 6.60 | 66,000 |
| 2016-02-29 | Mcclements William M. (Head of Corporate Operations) | Buy | 2,000 | 5.72 | 11,440 |
| 2016-02-29 | Porter Michael E (Director) | Buy | 10,000 | 5.61 | 56,100 |
| 2016-01-05 | Stewart Edward J. (Head of Commercial) | Sale | 4,000 | 8.00 | 32,000 |
| 2016-01-05 | Stewart Edward J. (Head of Commercial) | Option Ex | 4,000 | 1.81 | 7,240 |
| 2015-12-01 | Stewart Edward J. (Head of Commercial) | Sale | 5,000 | 9.33 | 46,650 |
| 2015-12-01 | Stewart Edward J. (Head of Commercial) | Option Ex | 5,000 | 1.81 | 9,050 |
| 2015-11-02 | Stewart Edward J. (Head of Commercial) | Sale | 6,000 | 9.65 | 57,900 |
| 2015-11-02 | Stewart Edward J. (Head of Commercial) | Option Ex | 6,000 | 1.81 | 10,860 |
| 2015-10-16 | Stewart Edward J. (Head of Commercial) | Sale | 1,000 | 10.00 | 10,000 |
| 2015-10-16 | Stewart Edward J. (Head of Commercial) | Option Ex | 1,000 | 1.81 | 1,810 |
| 2015-10-02 | Stewart Edward J. (Head of Commercial) | Sale | 1,000 | 9.00 | 9,000 |
| 2015-10-02 | Stewart Edward J. (Head of Commercial) | Option Ex | 1,000 | 1.81 | 1,810 |
| 2015-10-01 | Stewart Edward J. (Head of Commercial) | Sale | 4,000 | 8.00 | 32,000 |
Insider trading activities including stock purchases, stock sales, and option exercises of MACK listed in the above tables cannot be completely guaranteed as to their accuracy. For more insider trading information of Merrimack Pharmaceuticals Inc (symbol MACK, CIK number 1274792) see the Securities and Exchange Commission (SEC) website.