** Shares of Diversified Energy DEC.N up 2.9% at 1,310p among top gainers on London's midcap index .FTMC
** U.S.-based energy co DEC to buy private equity-owned Maverick Natural Resources for $1.28 bln
** Combined co, post acquisition, to have enterprise value of $3.8 bln
** DEC says deal to increase revenue by 95% and free cash flow by 55%
** Proposed transaction marks DEC as the largest consolidator of mature assets in the U.S. - Peel Hunt
** In 2024, DEC rose 20.5%