Stocks making the biggest moves premarket: General Motors, Tesla, Netflix, Boeing & more

Check out the companies making headlines before the bell:

— CEO Elon Musk pre-approval for any tweet related to the automaker since striking a settlement with the Securities and Exchange Commission (SEC), according to a filing by the commission with a judge. The SEC is seeking to hold Musk in contempt of court for alleged violation of the settlement agreement.

— CEO Reed Hastings said the video streaming service available on the new video offering that is expected to announce next week. Hastings said he prefers that customers view Netflix content on the company‘s own service.

— Canadian officials the approval the country gave to Boeing‘s 737 MAX jets. Transport Minister Marc Garneau said that no action might be taken, but that the move was wise in light of the worldwide grounding of the aircraft following two fatal crashes in the past few months.

— Revlon said it found a “material weakness” , although the cosmetics maker said it does not expect any changes to previously reported results. The company said the weakness relates to the implementation of a back end technology system.

, , , and — These stocks will begin trading today under new and reassigned ticker symbols and names, following the completion of purchase of Fox assets. Fox Corp. shares represent the TV and film studios, and 21st Century Fox represents Fox News and the broadcasting operation.

— Booking Holdings was downgraded to “market perform” from “outperform” at Telsey Advisory Group, with Telsey pointing to increased competition for the parent of Priceline and other travel sites from the likes of Airbnb and .

— Five Below was upgraded to “buy” from “hold” at Loop Capital Markets, which thinks the discount retailer has improved its merchandising and execution within its stores.

— Del Taco reported adjusted quarterly profit of 18 cents per share, missing estimates by a penny a share. Revenue exceeded forecasts, however. The restaurant chain also gave a full-year earnings forecast of 47 cents to 52 cents per share on an adjusted basis, short of the consensus forecast of 57 cents a share.