Ulrik B. Nielsen serves as Executive at MERRIMACK PHARMACEUTICALS INC, where they oversee executive responsibilities. Since joining the company, Ulrik B. Nielsen has executed 37 insider transactions totaling $4.6M, demonstrating a bearish approach to their equity position. Their most recent transaction on Jan 24, 2022 involved purchasing 14,287 shares valued at $60.6K.
Ulrik B. Nielsen currently holds 36,968 shares of MERRIMACK PHARMACEUTICALS INC (MACK), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Ulrik B. Nielsen has been a net seller of MACK stock. They have purchased $60.6K and sold $4.5M worth of shares.
Ulrik B. Nielsen's most recent insider trade was on Jan 24, 2022, when they purchased 14,287 shares at $4.24 per share.
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| $14.23 |
| Discretionary |
| Sep 15, 2017 | MACK | $8.8K | Option Exercise | 663 | $13.20 | Discretionary |
| Sep 15, 2017 | MACK | $94.2K | Option Exercise | 7,133 | $13.20 | Discretionary |
| Sep 14, 2017 | MACK | $1.4K | Sale | 100 | $14.20 | Discretionary |
| Sep 14, 2017 | MACK | $1.3K | Option Exercise | 100 | $13.20 | Discretionary |
| Sep 13, 2017 | MACK | $97.0K | Sale | 6,800 | $14.27 | Discretionary |
| Sep 13, 2017 | MACK | $89.8K | Option Exercise | 6,800 | $13.20 | Discretionary |
| Sep 11, 2017 | MACK | $194.8K | Option Exercise | 14,756 | $13.20 | Discretionary |
| Sep 11, 2017 | MACK | $213.4K | Sale | 14,756 | $14.46 | Discretionary |
| Jul 20, 2015 | MACK | $51.8K | Option Exercise | 20,000 | $2.59 | Discretionary |
| Jul 20, 2015 | MACK | $214.2K | Sale | 20,000 | $10.71 | Discretionary |
| Jun 19, 2015 | MACK | $480.8K | Sale | 40,000 | $12.02 | Discretionary |
| Jun 19, 2015 | MACK | $24.7K | Option Exercise | 10,000 | $2.47 | Discretionary |
| Jun 19, 2015 | MACK | $77.7K | Option Exercise | 30,000 | $2.59 | Discretionary |
| May 19, 2015 | MACK | $57.2K | Option Exercise | 23,175 | $2.47 | Discretionary |
| May 19, 2015 | MACK | $41.6K | Option Exercise | 16,825 | $2.47 | Discretionary |
| May 19, 2015 | MACK | $521.6K | Sale | 40,000 | $13.04 | Discretionary |
| Apr 20, 2015 | MACK | $25.6K | Option Exercise | 15,000 | $1.71 | Discretionary |
| Apr 20, 2015 | MACK | $45.3K | Option Exercise | 25,000 | $1.81 | Discretionary |
| Apr 20, 2015 | MACK | $515.2K | Sale | 40,000 | $12.88 | Discretionary |
| Apr 20, 2015 | MACK | $61.8K | Option Exercise | 25,000 | $2.47 | Discretionary |
| Mar 19, 2015 | MACK | $478.8K | Sale | 40,000 | $11.97 | Discretionary |
| Mar 19, 2015 | MACK | $68.4K | Option Exercise | 40,000 | $1.71 | Discretionary |
| Mar 4, 2015 | MACK | $34.2K | Option Exercise | 20,000 | $1.71 | Discretionary |
| Mar 4, 2015 | MACK | $240.2K | Sale | 20,000 | $12.01 | Discretionary |
| Feb 23, 2015 | MACK | $218.2K | Sale | 20,000 | $10.91 | Discretionary |
| Feb 23, 2015 | MACK | $13.6K | Option Exercise | 7,977 | $1.71 | Discretionary |
| Feb 23, 2015 | MACK | $20.6K | Option Exercise | 12,023 | $1.71 | Discretionary |
| Aug 26, 2014 | MACK | $62.5K | Option Exercise | 50,000 | $1.25 | Discretionary |