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MACK Insider Trading (Merrimack Pharmaceuticals)

Insider Ownership Percentage: 23.90%
Insider Buying (Last 12 Months): $837,314.72
Insider Selling (Last 12 Months): $0.00

Merrimack Pharmaceuticals Insider Trading History Chart

This chart shows the insider buying and selling history at Merrimack Pharmaceuticals by year and by quarter.

Skip ChartChart Data in Insider Trading History Table

Merrimack Pharmaceuticals Share Price & Price History

Current Price: $5.71
Price Change: Price Decrease of -0.29 (-4.83%)
As of 07/30/2021 12:00 PM ET

This chart shows the closing price history over time for MACK up to the past year.

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Days: 30 | 90 | 365
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Merrimack Pharmaceuticals Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
4/14/2021Eric AndersenDirectorBuy47,300$6.63$313,599.00View SEC Filing Icon  
4/12/2021Eric AndersenDirectorBuy23,629$6.06$143,191.74View SEC Filing Icon  
4/12/2021Gary L CrockerInsiderBuy973$6.07$5,906.11View SEC Filing Icon  
4/9/2021Gary L CrockerInsiderBuy1,200$6.10$7,320.00View SEC Filing Icon  
4/7/2021Gary L CrockerInsiderBuy2,127$6.19$13,166.13View SEC Filing Icon  
3/25/2021Gary L CrockerInsiderBuy200$6.13$1,226.00View SEC Filing Icon  
3/23/2021Gary L CrockerInsiderBuy3,627$6.47$23,466.69View SEC Filing Icon  
2/10/2021Gary L CrockerInsiderBuy3,500$7.64$26,740.00View SEC Filing Icon  
11/24/2020Noah G LevyDirectorBuy69,087$3.65$252,167.55View SEC Filing Icon  
8/13/2020Noah G LevyDirectorBuy608$3.50$2,128.00View SEC Filing Icon  
8/11/2020Eric AndersenDirectorBuy14,030$3.45$48,403.50View SEC Filing Icon  
7/22/2020Eric AndersenDirectorBuy177,274$3.11$551,322.14View SEC Filing Icon  
7/22/2020Gary L CrockerInsiderSell117,963$3.08$363,326.04View SEC Filing Icon  
4/20/2020Noah G LevyDirectorBuy2,325$3.25$7,556.25View SEC Filing Icon  
4/6/2020Eric AndersenInsiderBuy16,793$3.46$58,103.78
4/6/2020Noah G LevyDirectorBuy6,042$3.00$18,126.00View SEC Filing Icon  
4/3/2020Noah G LevyDirectorBuy10,750$2.59$27,842.50View SEC Filing Icon  
7/16/2019Jason AryehInsiderBuy302$5.44$1,642.883,802View SEC Filing Icon  
7/11/2019Jason AryehInsiderBuy100$5.71$571.00100View SEC Filing Icon  
7/2/2019Jfl Capital Management, LlcInsiderBuy50,288$5.92$297,704.96View SEC Filing Icon  
6/28/2019Jfl Capital Management, LlcInsiderBuy23,564$5.95$140,205.80View SEC Filing Icon  
4/17/2019Fund Lp 22NwInsiderBuy66,760$5.86$391,213.60View SEC Filing Icon  
4/15/2019Lp 22NwInsiderBuy30,110$5.73$172,530.30View SEC Filing Icon  
4/8/2019Jfl Capital Management, LlcInsiderBuy37,278$5.89$219,567.42View SEC Filing Icon  
4/5/2019Lp 22NwInsiderBuy50,000$6.12$306,000.00View SEC Filing Icon  
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SEC Filings (Institutional Ownership Changes) for Merrimack Pharmaceuticals (NASDAQ:MACK)

59.19% of Merrimack Pharmaceuticals stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

This chart shows the instiutional buying and selling at MACK by year and by quarter.

Skip Institutional Buying and Selling Chart and Table DataRead Chart Data in Institutional Trading History Table

Merrimack Pharmaceuticals Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
5/18/2021Millennium Management LLC12,292$77K0.0%N/A0.092%Search for SEC Filing on Google Icon
5/17/2021Price T Rowe Associates Inc. MD10,500$66K0.0%N/A0.078%Search for SEC Filing on Google Icon
5/14/2021Nantahala Capital Management LLC608,974$3.82M0.1%-19.0%4.541%Search for SEC Filing on Google Icon
5/14/2021Dimensional Fund Advisors LP519,220$3.26M0.0%-5.7%3.872%Search for SEC Filing on Google Icon
5/13/2021Renaissance Technologies LLC188,161$1.18M0.0%+6.4%1.403%Search for SEC Filing on Google Icon
5/13/2021Bank of New York Mellon Corp42,225$0.27M0.0%+140.7%0.315%Search for SEC Filing on Google Icon
5/12/2021Geode Capital Management LLC91,208$0.57M0.0%+9.3%0.680%Search for SEC Filing on Google Icon
5/10/2021Sepio Capital LP218,907$1.38M0.1%+13.1%1.632%Search for SEC Filing on Google Icon
5/7/2021BlackRock Inc.255,503$1.61M0.0%+1.4%1.905%Search for SEC Filing on Google Icon
4/26/2021Mascoma Wealth Management LLC5,000$31K0.0%N/A0.037%Search for SEC Filing on Google Icon
4/13/2021Bronte Capital Management Pty Ltd.550,679$3.46M0.4%+3.6%4.106%Search for SEC Filing on Google Icon
3/8/2021Dimensional Fund Advisors LP550,539$3.79M0.0%-2.9%4.115%Search for SEC Filing on Google Icon
2/25/2021Dimensional Fund Advisors LP550,539$3.79M0.0%-2.9%4.115%Search for SEC Filing on Google Icon
2/10/2021Renaissance Technologies LLC176,861$1.22M0.0%N/A1.322%Search for SEC Filing on Google Icon
12/16/2020Bronte Capital Management Pty Ltd.531,510$2.05M0.4%N/A3.972%Search for SEC Filing on Google Icon
11/17/2020Nantahala Capital Management LLC751,943$3.01M0.1%+0.6%5.620%Search for SEC Filing on Google Icon
11/12/2020Bronte Capital Management Pty Ltd.531,510$2.05M0.4%N/A3.972%Search for SEC Filing on Google Icon
10/29/2020LVW Advisors LLC20,000$80K0.0%N/A0.149%Search for SEC Filing on Google Icon
8/17/2020Private Advisor Group LLC7,562$25K0.0%N/A0.057%Search for SEC Filing on Google Icon
8/14/2020Western Standard LLC869,354$2.90M3.5%+3.1%6.497%Search for SEC Filing on Google Icon
4/29/2020Sepio Capital LLC353,644$0.76M0.1%-10.7%2.643%Search for SEC Filing on Google Icon
2/13/2020Renaissance Technologies LLC33,961$0.11M0.0%N/A0.254%Search for SEC Filing on Google Icon
2/6/2020Sepio Capital LLC396,184$1.25M0.1%+72.6%2.965%Search for SEC Filing on Google Icon
10/25/2019Sepio Capital LLC229,476$1.03M0.1%N/A1.718%Search for SEC Filing on Google Icon
10/22/2019LVW Advisors LLC68,507$0.31M0.1%N/A0.513%Search for SEC Filing on Google Icon
10/16/2019Campbell & CO Investment Adviser LLC24,682$0.11M0.0%N/A0.185%Search for SEC Filing on Google Icon
8/15/2019Nuveen Asset Management LLC473,811$2.87M0.0%N/A3.549%Search for SEC Filing on Google Icon
8/14/2019Citadel Advisors LLC13,459$82K0.0%N/A0.101%Search for SEC Filing on Google Icon
8/14/2019D. E. Shaw & Co. Inc.19,587$0.12M0.0%-81.6%0.147%Search for SEC Filing on Google Icon
8/14/2019Invesco Ltd.56,139$0.34M0.0%-3.3%0.421%Search for SEC Filing on Google Icon
8/14/2019Vanguard Group Inc.377,010$2.28M0.0%+67.6%2.824%Search for SEC Filing on Google Icon
8/13/2019Jacobs Levy Equity Management Inc.34,439$0.21M0.0%+41.7%0.258%Search for SEC Filing on Google Icon
8/13/2019BlackRock Inc.250,491$1.52M0.0%-1.7%1.876%Search for SEC Filing on Google Icon
8/7/2019Connor Clark & Lunn Investment Management Ltd.155,846$0.94M0.0%-3.7%1.167%Search for SEC Filing on Google Icon
6/30/2019Wittenberg Investment Management Inc.191,729$1.16M0.5%-11.3%1.436%Search for SEC Filing on Google Icon
5/8/2019Connor Clark & Lunn Investment Management Ltd.161,774$1.12M0.0%-4.3%1.212%Search for SEC Filing on Google Icon
5/7/2019Spark Investment Management LLC10,100$70K0.0%-79.3%0.076%Search for SEC Filing on Google Icon
4/1/2019Deutsche Bank AG27,946$0.11M0.0%-8.2%0.209%Search for SEC Filing on Google Icon
2/15/2019Millennium Management LLC28,184$0.11M0.0%-78.9%0.211%Search for SEC Filing on Google Icon
2/14/2019D. E. Shaw & Co. Inc.55,124$0.21M0.0%+78.1%0.413%Search for SEC Filing on Google Icon
2/14/2019Two Sigma Investments LP72,877$0.28M0.0%+28.7%0.546%Search for SEC Filing on Google Icon
2/13/2019Dimensional Fund Advisors LP570,818$2.20M0.0%-0.5%4.278%Search for SEC Filing on Google Icon
2/12/2019Connor Clark & Lunn Investment Management Ltd.169,074$0.65M0.0%-1.5%1.267%Search for SEC Filing on Google Icon
2/12/2019Northern Trust Corp60,417$0.23M0.0%+20.5%0.453%Search for SEC Filing on Google Icon
2/11/2019Bank of New York Mellon Corp18,255$70K0.0%N/A0.137%Search for SEC Filing on Google Icon
2/8/2019BlackRock Inc.256,175$0.99M0.0%+0.8%1.920%Search for SEC Filing on Google Icon
2/8/201922NW LP749,302$2.89M1.8%N/A5.616%Search for SEC Filing on Google Icon
12/13/2018Vanguard Group Inc546,632$2.91M0.0%-1.1%4.098%Search for SEC Filing on Google Icon
12/13/2018Federated Investors Inc. PA48,707$0.26M0.0%-45.6%0.365%Search for SEC Filing on Google Icon
11/14/2018Clearline Capital LP320,855$1.71M1.0%+440.8%2.405%Search for SEC Filing on Google Icon
11/13/2018Dimensional Fund Advisors LP573,514$3.06M0.0%+22.4%4.299%Search for SEC Filing on Google Icon
11/13/2018Rubric Capital Management LP554,338$2.96M0.3%+16.4%4.155%Search for SEC Filing on Google Icon
11/7/2018JPMorgan Chase & Co.55,094$0.29M0.0%+54,994.0%0.413%Search for SEC Filing on Google Icon
10/17/2018Stonebridge Capital Management Inc.34,130$0.18M0.1%+64.7%0.256%Search for SEC Filing on Google Icon
9/18/2018Northern Trust Corp49,498$0.24M0.0%-69.0%0.371%Search for SEC Filing on Google Icon
8/15/2018Millennium Management LLC170,906$0.84M0.0%+30.0%1.281%Search for SEC Filing on Google Icon
8/15/2018Newtyn Management LLC633,297$3.11M0.6%+349.6%4.747%Search for SEC Filing on Google Icon
8/14/2018Paloma Partners Management Co62,600$0.31M0.0%+379.5%0.469%Search for SEC Filing on Google Icon
8/14/2018Clearline Capital LP59,331$0.29M0.2%N/A0.445%Search for SEC Filing on Google Icon
8/14/2018Dynamic Technology Lab Private Ltd22,731$0.11M0.0%+122.9%0.170%Search for SEC Filing on Google Icon
8/10/2018Federated Investors Inc. PA89,540$0.44M0.0%-18.0%0.671%Search for SEC Filing on Google Icon
8/10/2018FMR LLC49,071$0.24M0.0%-97.0%0.368%Search for SEC Filing on Google Icon
8/10/2018Dimensional Fund Advisors LP468,377$2.30M0.0%+26.6%3.511%Search for SEC Filing on Google Icon
8/9/2018BlackRock Inc.252,594$1.24M0.0%-68.6%1.894%Search for SEC Filing on Google Icon
8/9/2018GSA Capital Partners LLP29,089$0.14M0.0%N/A0.218%Search for SEC Filing on Google Icon
8/8/2018Schwab Charles Investment Management Inc.29,520$0.15M0.0%-44.9%0.221%Search for SEC Filing on Google Icon
8/6/2018Bank of New York Mellon Corp43,069$0.21M0.0%-45.8%0.323%Search for SEC Filing on Google Icon
8/3/2018LMR Partners LLP42,910$0.21M0.0%N/A0.322%Search for SEC Filing on Google Icon
8/2/2018Connor Clark & Lunn Investment Management Ltd.174,774$0.86M0.0%+22.0%1.310%Search for SEC Filing on Google Icon
7/31/2018Wittenberg Investment Management Inc.253,752$1.25M0.5%+105.8%1.902%Search for SEC Filing on Google Icon
5/16/2018Newtyn Management LLC140,857$1.13M0.2%-61.1%1.056%Search for SEC Filing on Google Icon
5/16/2018Millennium Management LLC131,504$1.06M0.0%-35.7%0.986%Search for SEC Filing on Google Icon
5/14/2018Rubric Capital Management LP476,164$3.83M0.4%+16.1%3.569%Search for SEC Filing on Google Icon
5/14/2018Yakira Capital Management Inc.74,434$0.60M0.1%-11.4%0.558%Search for SEC Filing on Google Icon
5/11/2018Russell Investments Group Ltd.106,464$0.86M0.0%+14.5%0.798%Search for SEC Filing on Google Icon
5/11/2018Dimensional Fund Advisors LP369,982$2.98M0.0%+83.8%2.773%Search for SEC Filing on Google Icon
5/10/2018Spark Investment Management LLC58,700$0.47M0.0%+448.6%0.440%Search for SEC Filing on Google Icon
5/9/2018Federated Investors Inc. PA109,179$0.88M0.0%-7.2%0.818%Search for SEC Filing on Google Icon
5/9/2018BlackRock Inc.805,320$6.48M0.0%-0.9%6.037%Search for SEC Filing on Google Icon
5/9/2018Northern Trust Corp159,477$1.28M0.0%+6.7%1.195%Search for SEC Filing on Google Icon
2/15/2018Macquarie Group Ltd.24,130$0.25M0.0%+155.9%0.181%Search for SEC Filing on Google Icon
2/15/2018Jane Street Group LLC10,448$0.11M0.0%N/A0.078%Search for SEC Filing on Google Icon
2/15/2018Millennium Management LLC204,566$2.10M0.0%+219.6%1.533%Search for SEC Filing on Google Icon
2/14/2018TIAA CREF Investment Management LLC551,350$5.65M0.0%-1.9%4.133%Search for SEC Filing on Google Icon
2/14/2018Teachers Advisors LLC25,115$0.26M0.0%-37.4%0.188%Search for SEC Filing on Google Icon
2/14/2018Paloma Partners Management Co22,156$0.23M0.0%N/A0.166%Search for SEC Filing on Google Icon
2/14/2018Goldman Sachs Group Inc.38,678$0.40M0.0%-64.5%0.290%Search for SEC Filing on Google Icon
2/14/2018Deutsche Bank AG143,770$1.47M0.0%-9.5%1.078%Search for SEC Filing on Google Icon
2/14/2018Franklin Resources Inc.369,625$3.79M0.0%-6.7%2.771%Search for SEC Filing on Google Icon
2/13/2018Bogle Investment Management L P DE66,498$0.68M0.1%N/A0.498%Search for SEC Filing on Google Icon
2/13/2018Geode Capital Management LLC108,621$1.11M0.0%+5.0%0.814%Search for SEC Filing on Google Icon
2/13/2018Yakira Capital Management Inc.83,969$0.86M0.3%+445.0%0.629%Search for SEC Filing on Google Icon
2/12/2018Wittenberg Investment Management Inc.83,811$0.86M0.4%+28.9%0.628%Search for SEC Filing on Google Icon
2/12/2018Spark Investment Management LLC10,700$0.11M0.0%N/A0.080%Search for SEC Filing on Google Icon
2/9/2018Virtu Financial LLC11,263$0.12M0.0%N/A0.084%Search for SEC Filing on Google Icon
2/9/2018BlackRock Inc.813,041$8.33M0.0%-21.4%6.095%Search for SEC Filing on Google Icon
2/9/2018Bank of New York Mellon Corp80,210$0.82M0.0%+16.2%0.601%Search for SEC Filing on Google Icon
2/8/2018Wells Fargo & Company MN18,287$0.19M0.0%+43.9%0.137%Search for SEC Filing on Google Icon
1/29/2018Stonebridge Capital Management Inc.18,550$0.20M0.1%N/A0.139%Search for SEC Filing on Google Icon
11/22/2017Rubric Capital Management LP337,868$4.91M0.5%N/A2.535%Search for SEC Filing on Google Icon
Data available starting January 2016

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Merrimack Pharmaceuticals logo
Merrimack Pharmaceuticals, Inc. operates as a biopharmaceutical company. The company was founded in 1993 and is headquartered in Cambridge, Massachusetts.
Read More on Merrimack Pharmaceuticals

Today's Range

Now: $5.71
Low: $5.71
High: $5.79

50 Day Range

MA: $6.33
Low: $5.98
High: $6.52

52 Week Range

Now: $5.71
Low: $3.20
High: $9.45

Volume

200 shs

Average Volume

59,661 shs

Market Capitalization

$76.57 million

P/E Ratio

N/A

Dividend Yield

N/A

Beta

2.31

Who are the company insiders with the largest holdings of Merrimack Pharmaceuticals?

Merrimack Pharmaceuticals' top insider shareholders include:
  1. Eric Andersen (Director)
  2. Eric Andersen (Insider)
  3. Gary L Crocker (Insider)
  4. Noah G Levy (Director)
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