shares of southwest gas holdings inc slipped more than 8 in premarket trading on wednesday after the company said it has ended the sale process for the parent and its namesake unit after determining that the best option to maximize shareholder value is to continue to execute its strategic plan at the naturalgas utility however the las vegas company said it will continue to review strategic alternatives for its mountainwest pipelines storage and pipelineservices unit and its centuri group unregulated utility services platform southwest launched the strategic review in april after coming under pressure from billionaire carl icahn who had launched a hostile takeover bid and a proxy battle seeking control of the companys board southwest in may reached a settlement that gave mr icahn seats on the board and on the board committee tasked with the strategic review the company on wednesday said it made its decision after carefully evaluating all indications of interest and considering the utility units strong longterm rate base growth and favorable demographics southwest said it will continue to assess a sale of mountainwest and a sale or spinoff of centuri southwest shares which closed tuesday at 8732 were recently down 84 to 80 in premarket trading