Wells Fargo analyst Edward Kelly notes The New York Post reported that Carl Icahn is building a significant stake in Dollar Tree (DLTR), which could be clear opportunity to unlock value. The analyst believes Dollar Tree remains materially undervalued, but is in desperate need of change. Family Dollar looks to be suffering from underinvestment and execution issues, and his new proprietary work suggests there is a pressing need to either ramp investment to better compete with Dollar General (DG) or sell. The analyst argues that the core is a good business, but breaking the buck represents a compelling opportunity to extend growth and enhance profitability. He reiterates an Outperform rating and $104 price target on Dollar Tree's shares.