Activist fund Starboard Value has built a position in Dollar Tree Inc. (DLTR.O) and is urging the company to explore ways to unlock value, including selling its Family Dollar business, according to people familiar with the matter.

The New York hedge fund, which owns about 1.7 percent of Dollar Tree, has nominated seven potential directors for the company’s 12-member board, said the people. Starboard is also urging Dollar Tree to explore charging more than a dollar for its products due to rising production costs, the people said, asking not be identified because the matter is private.

Starboard, which is run by Jeff Smith, believes Dollar Tree could be worth $150 per share or more if it executes on its proposed changes, the people said.

Dollar Tree shares rose more than 2 percent to $92.89 at the close Friday in New York, giving the company a market value of about $22 billion. The Wall Street Journal reported Starboard’s push for changes earlier Sunday, citing unidentified people.