Roll up is a type of merger where the investors in the market buy 2 or more companies and merge them up or roll up to enjoy economies of scale and reduce costs. The companies in merger are generally small companies. 2. Advantages of roll up are: a. Provides instant growth in terms of instant risks and rewards to investors due to the synergies achieved by the merger. B. Eliminate the competitors in the market due to some of horizontal and vertical mergers I.e. moving up or down the supply chain. C. Surprise and challenge the competitors in the market. 3. Disadvantages of roll up are: A. Integration risk is an important issue when it comes to the integration of operations of two businesses. B. Increased cost, sometimes the cost of synergies doesn\'t outweigh the benefits of merger. C. Cultural issues are also important to address of the merging companies. 4. The recent successful roll up example is of Valeant Pharmaceuticals International Inc. based in Canada. This company grew rapidly with a series of mergers and acquisitions under the leadership of J. Michael Pearson and in 2015 it was the most valuable company in Canada. It accquire Salix Pharmaceutical for 14.5$ billion in 2015. Solution Roll up is a type of merger where the investors in the market buy 2 or more companies and merge them up or roll up to enjoy economies of scale and reduce costs. The companies in merger are generally small companies. 2. Advantages of roll up are: a. Provides instant growth in terms of instant risks and rewards to investors due to the synergies achieved by the merger. B. Eliminate the competitors in the market due to some of horizontal and vertical mergers I.e. moving up or down the supply chain. C. Surprise and challenge the competitors in the market. 3. Disadvantages of roll up are: A. Integration risk is an important issue when it comes to the integration of operations of two businesses. B. Increased cost, sometimes the cost of synergies doesn\'t outweigh the benefits of merger. C. Cultural issues are also important to address of the merging companies. 4. The recent successful roll up example is of Valeant Pharmaceuticals International Inc. based in Canada. This company grew rapidly with a series of mergers and acquisitions under the leadership of J. Michael Pearson and in 2015 it was the most valuable company in Canada. It accquire Salix Pharmaceutical for 14.5$ billion in 2015..