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MACK Insider Trading

Notice: This stock is marked as potentially delisted. It may not be actively trading.
Insider Ownership Percentage: 30.57%
Insider Buying (Last 12 Months): $0.00
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: $15.13
Price Change: +0.30 (1.20%)
As of 05/28/2024 01:00 AM ET

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

Skip Chart and Table DataPrice Data in Insider Trading History Table

Merrimack Pharmaceuticals Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
12/28/2023Eric AndersenDirectorBuy857$13.35$11,440.95534,008View SEC Filing Icon  
12/26/2023Eric AndersenDirectorBuy48,693$13.15$640,312.95533,151View SEC Filing Icon  
12/7/2023Eric AndersenDirectorBuy101,050$12.85$1,298,492.501,735,600View SEC Filing Icon  
11/17/2023Eric AndersenDirectorBuy300$12.50$3,750.001,659,216View SEC Filing Icon  
11/14/2023Eric AndersenDirectorBuy50,170$12.50$627,125.001,658,981View SEC Filing Icon  
8/10/2023Gary L. CrockerInsiderBuy2,000$12.52$25,040.00133,105View SEC Filing Icon  
8/7/2023Eric AndersenDirectorBuy134,493$12.00$1,613,916.001,496,680View SEC Filing Icon  
3/21/2023Eric AndersenDirectorBuy160,590$11.52$1,849,996.801,412,044View SEC Filing Icon  
1/30/2023Eric AndersenDirectorBuy24,708$11.36$280,682.881,282,853View SEC Filing Icon  
1/27/2023Eric AndersenDirectorBuy21,875$11.40$249,375.001,263,103View SEC Filing Icon  
1/12/2023Noah G. LevyDirectorBuy100,000$11.90$1,190,000.001,119,586View SEC Filing Icon  
1/6/2023Ana RadeljevicDirectorBuy4,156$12.03$49,996.684,156View SEC Filing Icon  
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SEC Filings (Institutional Ownership Changes) for Merrimack Pharmaceuticals (NASDAQ:MACK)

63.97% 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
1/16/2025MassMutual Private Wealth & Trust FSB24,500$0.37M0.0%N/A0.166%Search for SEC Filing on Google Icon
8/14/2024Marshall Wace LLP38,221$0.58M0.0%N/A0.258%Search for SEC Filing on Google Icon
8/9/2024Dimensional Fund Advisors LP318,995$4.83M0.0%-19.9%2.157%Search for SEC Filing on Google Icon
8/8/2024JBF Capital Inc.39,637$0.60M0.1%N/A0.268%Search for SEC Filing on Google Icon
8/1/2024Rhumbline Advisers2,480$38K0.0%-81.7%0.017%Search for SEC Filing on Google Icon
5/15/2024Aristides Capital LLC10,000$0.15M0.1%N/A0.069%Search for SEC Filing on Google Icon
5/10/2024Vanguard Group Inc.620,847$9.17M0.0%+2.0%4.272%Search for SEC Filing on Google Icon
5/1/2024BNP Paribas Financial Markets5,077$75K0.0%+67.3%0.035%Search for SEC Filing on Google Icon
2/14/2024ADAR1 Capital Management LLC549,418$7.37M2.6%N/A3.837%Search for SEC Filing on Google Icon
1/30/2024Strs Ohio3,300$44K0.0%N/A0.023%Search for SEC Filing on Google Icon
1/25/2024Allspring Global Investments Holdings LLC11,827$0.16M0.0%N/A0.083%Search for SEC Filing on Google Icon
11/15/2023Kennedy Capital Management LLC93,708$1.16M0.0%+2.4%0.654%Search for SEC Filing on Google Icon
11/14/2023Wittenberg Investment Management Inc.209,739$2.59M0.9%+2.3%1.465%Search for SEC Filing on Google Icon
11/8/2023Sepio Capital LP306,680$3.78M0.3%+4.1%2.142%Search for SEC Filing on Google Icon
8/11/2023Wittenberg Investment Management Inc.204,994$2.52M0.9%+3.5%1.432%Search for SEC Filing on Google Icon
8/4/2023American International Group Inc.5,039$62K0.0%N/A0.035%Search for SEC Filing on Google Icon
8/3/2023Fifth Lane Capital LP10,929$0.13M0.0%N/A0.077%Search for SEC Filing on Google Icon
5/15/2023Wittenberg Investment Management Inc.197,994$2.43M0.9%+3.6%1.388%Search for SEC Filing on Google Icon
5/15/2023Madison Avenue Partners LP553,085$6.80M1.5%N/A3.879%Search for SEC Filing on Google Icon
5/15/2023Sio Capital Management LLC272,843$3.35M1.7%+9.1%1.913%Search for SEC Filing on Google Icon
5/12/2023Yakira Capital Management Inc.72,118$0.89M0.2%-15.9%0.506%Search for SEC Filing on Google Icon
2/15/2023Nantahala Capital Management LLC210,000$2.41M0.2%-51.1%1.566%Search for SEC Filing on Google Icon
2/10/202322NW LP1,015,048$11.63M6.3%-17.5%7.569%Search for SEC Filing on Google Icon
2/10/2023Yakira Capital Management Inc.85,732$0.98M0.2%-26.0%0.639%Search for SEC Filing on Google Icon
2/6/2023Wittenberg Investment Management Inc.191,194$2.19M0.9%+1.3%1.426%Search for SEC Filing on Google Icon
11/14/2022Point72 Asset Management L.P.1,100,994$4.13M0.0%+228.5%8.210%Search for SEC Filing on Google Icon
11/10/2022Nantahala Capital Management LLC429,596$1.61M0.1%-12.6%3.204%Search for SEC Filing on Google Icon
10/28/2022Sepio Capital LP294,545$1.11M0.1%-6.9%2.196%Search for SEC Filing on Google Icon
8/16/2022Western Standard LLC1,269,558$7.55M5.7%+8.3%9.467%Search for SEC Filing on Google Icon
8/15/2022Nantahala Capital Management LLC491,509$2.92M0.1%-4.9%3.665%Search for SEC Filing on Google Icon
8/11/2022Yakira Capital Management Inc.115,821$0.69M0.1%+30.6%0.864%Search for SEC Filing on Google Icon
7/26/2022Sepio Capital LP316,313$1.88M0.2%+6.7%2.359%Search for SEC Filing on Google Icon
5/13/2022Bronte Capital Management Pty Ltd.578,313$3.66M0.3%+7.6%4.313%Search for SEC Filing on Google Icon
5/12/2022Yakira Capital Management Inc.88,683$0.56M0.1%+20.7%0.661%Search for SEC Filing on Google Icon
5/9/2022Sepio Capital LP296,546$1.88M0.2%+276.2%2.211%Search for SEC Filing on Google Icon
2/16/2022Western Standard LLC1,172,463$4.58M2.7%-7.6%8.743%Search for SEC Filing on Google Icon
2/10/2022Bronte Capital Management Pty Ltd.537,584$2.10M0.1%-2.1%4.009%Search for SEC Filing on Google Icon
2/9/2022Dimensional Fund Advisors LP488,687$1.91M0.0%-2.1%3.644%Search for SEC Filing on Google Icon
2/9/2022Yakira Capital Management Inc.73,450$0.29M0.0%+21.1%0.548%Search for SEC Filing on Google Icon
1/20/2022Radnor Capital Management LLC13,332$52K0.0%N/A0.099%Search for SEC Filing on Google Icon
11/15/2021Point72 Asset Management L.P.341,685$1.65M0.0%+63.0%2.548%Search for SEC Filing on Google Icon
11/15/2021Dimensional Fund Advisors LP499,368$2.41M0.0%-3.5%3.724%Search for SEC Filing on Google Icon
11/9/2021BlackRock Inc.211,051$1.02M0.0%+12.8%1.574%Search for SEC Filing on Google Icon
11/3/2021Sepio Capital LP78,829$0.38M0.0%-64.4%0.588%Search for SEC Filing on Google Icon
8/16/2021State Street Corp46,556$0.30M0.0%+316.2%0.347%Search for SEC Filing on Google Icon
8/13/2021Northern Trust Corp31,678$0.20M0.0%-12.5%0.236%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 in the United States. The company was incorporated in 1993 and is headquartered in Cambridge, Massachusetts.
Read More on Merrimack Pharmaceuticals

Today's Range

Now: $15.13
Low: $15.13
High: $15.13

50 Day Range

MA: $14.82
Low: $14.65
High: $15.13

52 Week Range

Now: $15.13
Low: $11.53
High: $15.89

Volume

N/A

Average Volume

396,929 shs

Market Capitalization

$223.77 million

P/E Ratio

1.09

Dividend Yield

N/A

Beta

1.45

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

Merrimack Pharmaceuticals' top insider shareholders include:
  1. Eric Andersen (Director)
Learn More about top insider investors at Merrimack Pharmaceuticals.