Threshold reported a life extension of 9.2 months for patients treated with TH-302 compared to Gemcitabine alone at 6.7 months. Obviously Merrimack will have some competition in this space, but the company's success or failure all depends on what they finally report in their phase three result of MM-398. Final Thoughts Merrimack Pharmaceuticals Inc (NASDAQ:MACK) has an array of cancer drugs in its pipeline that could bring lots of value for long term investors. It has been able to provide an initial public offering to provide adequate funding for their late stage trials and other administrative expenses. The pancreatic cancer market will grow to $1.2 billion dollars in 2015 and that could bring a huge opportunity for long term investors in Merrimack Pharmaceuticals Inc (NASDAQ:MACK). If all goes well with MM-398 then the company's valuation will be reevaluated to be higher because of the market potential for the drug.