The Round Rock, Texas-based company, headed by its founder Michael Dell, is under pressure to boost its profitability after the EMC deal failed to deliver the cost savings and performance it projected, while higher component costs and a challenging data storage market have eroded its margins. Dell is reviewing a list of several possible acquisition targets that would boost its cash flow and expand its offerings, the sources said. Dell's review is at its very early stages and no deal is certain, according to the sources, who requested anonymity to discuss the deliberations. The company did not respond to a request for comment outside of regular US. business hours. The news of Dell's review was first reported by Bloomberg. Dell is also considering a sale or initial public offering (IPO) of its one of its fast-growing divisions, Pivotal Software Inc, the sources said. It may also consider a transaction with its majority-owned VMware, a virtualization software maker.