LONDON, June 10 (Reuters) - Engelhart Commodities

Trading Partners has agreed to buy energy and technology company

Trailstone Group to strengthen its global power and gas trading

platform, the company said on Monday.

Engelhart will buy Trailstone, which offers services to help

manage the variability of renewable power generation for asset

owners, operators and grid infrastructure, from private equity

firm Riverstone Holdings.

Reuters first reported talks of the deal in March.

Trailstone is also active in trading power, natural gas and

environmental products across North America, Europe and Asia.

Engelhart declined to disclose financial details of the

deal.

The acquisition remains subject to regulatory approval but

is expected to take place in the third quarter of this year,

Engelhart said.

Engelhart is a global commodities business that trades in

power, gas and oil markets and is also active in agricultural

markets and freight.

In May, Chase Allen, a top Texas power trader, departed

Trailstone after nearly a decade at the company, Reuters

reported.