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- As of  04/30/25, 02:33:22 PM:   55 Insider Transactions.

Sector: Unknown    Industry: Unknown
Prev Close:$0.00  Avg Vol(3m): 0  P/E: 0.00  EPS: 0.00

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Buy/Sell* Filed Date Subject Symbol Acquirer Pct Owned Details
B 2020-07-24 17:42:28.0 MERRIMACK PHARMACEUTICALS INC MACK Newtyn Management 10.3% view
B 2020-07-23 20:44:28.0 MERRIMACK PHARMACEUTICALS INC MACK Western Standard LLC 7.8% view
S 2020-02-14 15:17:34.0 MERRIMACK PHARMACEUTICALS INC MACK BIOTECHNOLOGY VALUE FUND L P 0.0% view
B 2020-02-14 12:23:53.0 MERRIMACK PHARMACEUTICALS INC MACK Nantahala Capital Management 5.6% view
S 2019-11-19 16:00:45.0 MERRIMACK PHARMACEUTICALS INC MACK JFL Capital Management 5.3% view
B 2019-09-27 18:51:34.0 MERRIMACK PHARMACEUTICALS INC MACK Newtyn Management 8.8% view
S 2019-09-27 18:46:34.0 MERRIMACK PHARMACEUTICALS INC MACK Western Standard LLC 6.3% view
B 2019-09-24 16:52:50.0 MERRIMACK PHARMACEUTICALS INC MACK JFL Capital Management 9.4% view
S 2019-09-19 12:40:04.0 MERRIMACK PHARMACEUTICALS INC MACK Newtyn Management 8.8% view
B 2019-09-19 12:31:03.0 MERRIMACK PHARMACEUTICALS INC MACK Western Standard LLC 8.8% view
B 2019-07-24 16:47:00.0 MERRIMACK PHARMACEUTICALS INC MACK JFL Capital Management 9.4% view
B 2019-05-13 16:00:46.0 MERRIMACK PHARMACEUTICALS INC MACK Newtyn Management 8.9% view
B 2019-04-17 17:17:45.0 MERRIMACK PHARMACEUTICALS INC MACK JFL Capital Management 9.3% view
B 2019-03-14 09:00:19.0 MERRIMACK PHARMACEUTICALS INC MACK JFL Capital Management 8.7% view
S 2019-02-14 16:37:53.0 MERRIMACK PHARMACEUTICALS INC MACK BIOTECHNOLOGY VALUE FUND L P 5.4% view
B 2019-02-14 16:08:49.0 MERRIMACK PHARMACEUTICALS INC MACK Newtyn Management 6.7% view
B 2019-02-08 16:01:21.0 MERRIMACK PHARMACEUTICALS INC MACK 22NW 5.62% view
B 2018-12-19 16:10:29.0 MERRIMACK PHARMACEUTICALS INC MACK JFL Capital Management 8.5% view
B 2018-11-02 17:15:31.0 MERRIMACK PHARMACEUTICALS INC MACK JFL Capital Management 7.1% view
S 2018-07-10 08:26:16.0 MERRIMACK PHARMACEUTICALS INC MACK BlackRock Inc 1.9% view
S 2018-05-10 10:50:12.0 MERRIMACK PHARMACEUTICALS INC MACK FMR LLC 4.514% view
B 2018-04-10 17:19:45.0 MERRIMACK PHARMACEUTICALS INC MACK BIOTECHNOLOGY VALUE FUND L P 8.3% view
B 2018-02-14 16:58:13.0 MERRIMACK PHARMACEUTICALS INC MACK Consonance Capital Management LP 100.0% view
S 2018-02-13 20:48:31.0 MERRIMACK PHARMACEUTICALS INC MACK TEACHERS ADVISORS 4.13% view
S 2018-02-13 19:27:55.0 MERRIMACK PHARMACEUTICALS INC MACK TIAA CREF INVESTMENT MANAGEMENT LLC 4.13% view
S 2018-02-13 09:41:14.0 MERRIMACK PHARMACEUTICALS INC MACK FMR LLC 12.017% view
S 2018-01-25 11:11:38.0 MERRIMACK PHARMACEUTICALS INC MACK BlackRock Inc 6.1% view
S 2017-04-07 15:22:45.0 MERRIMACK PHARMACEUTICALS INC MACK WESTFIELD CAPITAL MANAGEMENT CO LP 0.0% view
B 2017-02-14 14:26:10.0 MERRIMACK PHARMACEUTICALS INC MACK TEACHERS ADVISORS 4.94% view
B 2017-02-14 13:39:57.0 MERRIMACK PHARMACEUTICALS INC MACK TIAA CREF INVESTMENT MANAGEMENT LLC 4.94% view
B 2017-02-14 11:39:25.0 MERRIMACK PHARMACEUTICALS INC MACK FMR LLC 14.999% view
B 2017-02-14 10:26:57.0 MERRIMACK PHARMACEUTICALS INC MACK Consonance Capital Management LP 7.0% view
B 2017-02-10 10:52:26.0 MERRIMACK PHARMACEUTICALS INC MACK WESTFIELD CAPITAL MANAGEMENT CO LP 7.0% view
S 2017-02-10 09:03:13.0 MERRIMACK PHARMACEUTICALS INC MACK VANGUARD GROUP INC 7.09% view
B 2017-01-25 14:45:48.0 MERRIMACK PHARMACEUTICALS INC MACK BlackRock Inc 8.4% view
B 2016-02-12 09:23:22.0 MERRIMACK PHARMACEUTICALS INC MACK FMR LLC 14.999% view
B 2016-02-10 16:59:16.0 MERRIMACK PHARMACEUTICALS INC MACK WESTFIELD CAPITAL MANAGEMENT CO LP 6.28% view
B 2016-02-10 16:19:59.0 MERRIMACK PHARMACEUTICALS INC MACK TIAA CREF INVESTMENT MANAGEMENT LLC 4.4% view
B 2016-02-10 15:58:52.0 MERRIMACK PHARMACEUTICALS INC MACK TEACHERS ADVISORS INC 4.4% view
B 2016-02-10 08:55:58.0 MERRIMACK PHARMACEUTICALS INC MACK VANGUARD GROUP INC 8.92% view
B 2016-01-26 16:40:20.0 MERRIMACK PHARMACEUTICALS INC MACK BlackRock Inc 7.6% view
S 2015-02-13 13:55:16.0 MERRIMACK PHARMACEUTICALS INC MACK Sanofi 2.9% view
S 2015-02-13 10:27:45.0 MERRIMACK PHARMACEUTICALS INC MACK FMR LLC 14.999% view
B 2015-02-11 11:34:27.0 MERRIMACK PHARMACEUTICALS INC MACK VANGUARD GROUP INC 6.24% view
S 2015-02-10 13:48:44.0 MERRIMACK PHARMACEUTICALS INC MACK JENNISON ASSOCIATES LLC 0.0% view
B 2015-02-02 16:39:01.0 MERRIMACK PHARMACEUTICALS INC MACK BlackRock Inc 6.9% view
S 2015-02-02 12:05:30.0 MERRIMACK PHARMACEUTICALS INC MACK PRUDENTIAL FINANCIAL INC 0.0% view
S 2014-02-14 06:53:28.0 MERRIMACK PHARMACEUTICALS INC MACK FMR LLC 15.0% view
B 2014-02-07 16:19:29.0 MERRIMACK PHARMACEUTICALS INC MACK JENNISON ASSOCIATES LLC 6.4% view
B 2014-02-05 11:35:30.0 MERRIMACK PHARMACEUTICALS INC MACK PRUDENTIAL FINANCIAL INC 6.4% view
S 2014-01-08 16:42:45.0 MERRIMACK PHARMACEUTICALS INC MACK CREDIT SUISSE AG 0.8% view
B 2013-02-14 13:54:37.0 MERRIMACK PHARMACEUTICALS INC MACK CREDIT SUISSE AG 5.41% view
B 2012-11-13 14:10:06.0 MERRIMACK PHARMACEUTICALS INC MACK FMR LLC 17.003% view
B 2012-04-10 08:44:04.0 MERRIMACK PHARMACEUTICALS INC MACK FMR LLC 10.623% view
B 2012-04-02 17:24:34.0 MERRIMACK PHARMACEUTICALS INC n/a Sanofi 5.65% view
* Institutions do not report transaction buy/sell types directly. To help members better understand the transactions, this column is filled by InsiderCow's best-effort interpretations.