Tallgrass Energy, a midstream company, agreed to acquire a 25% stake in Rockies Express Pipeline, a high-pressure natural gas pipeline system, from Phillips 66, an energy company, for $319m. “This sale is an important step in our commitment to deliver over $3bn in asset divestitures. We are committed to managing our portfolio and monetizing assets that no longer fit our long-term strategy," Mark Lashier, Phillips 66 Chairman and CEO.