It will collect $568m for the vessels which emerged as sales candidates earlier this summer.
The owner will pocket a pre-tax gain of $45m from the deal that comes 14 months after the newbuildings were placed at sibling company Aker Philadelphia Shipyard.
Rokke described the deal as a successful outcome for the shipowner’s shareholders.
“Philly Tankers has made noteworthy achievements since its inception, including securing long-term employment for two of its vessels, the opportunistic exercise of its options and now the assignment of all four of its new building contracts to Kinder Morgan, which provides an attractive return to Philly Tankers' shareholders," said Rokke in a statement.
Rokke’s Aker Philadelphia has invested $58.5m into the project last year, with American Shipping putting in $25m.
Kinder Morgan is no stranger to big-ticket takeovers paying almost $1bn for American Petroleum Tankers and Blackstone stablemate State Class Tankers in late 2013.
