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Plug Power Inc.’s bid to become a major supplier of carbon-free hydrogen just won the backing of one of the company’s oldest customers: Walmart Inc.

PROVIDENCE, R.I. — Twitter said April 15 that its board of directors has unanimously adopted a “poison pill” defense in response to Tesla CEO Elon Musk’s proposal to buy the company for more than $43 billion and take it private.

Elon Musk has made a controversial offer to buy Twitter Inc., saying the company has extraordinary potential and he is the person to unlock it.

Tesla Inc. will start production next year of three products that have fallen well behind Elon Musk’s original schedule, including the Semi.

Tesla Inc. gained in early trading March 28 after the carmaker said it plans to seek shareholder approval for a move that would enable its second stock split in roughly two years.

Dan Ammann, who led the Cruise self-driving unit of General Motors Co. until December with a mission to reduce traffic and eliminate emissions, has landed at oil giant Exxon Mobil Corp.

Stellantis NV and LG Energy Solution will build their new battery plant in Ontario, according to a person familiar with the matter, with an official announcement likely March 23.

Tesla Inc. Chief Executive Officer Elon Musk asked a judge to end the U.S. Securities and Exchange Commission’s oversight of his Twitter posts under a 2018 agreement because he claims it is being used to “trample” his free speech rights.

Sony Group Corp. and Honda Motor Co. agreed to establish a joint venture this year to start selling an electric vehicle by 2025, both sides said March 4.

DETROIT — Elon Musk is inviting the United Auto Workers union to hold an organizing vote at Tesla’s factory in Fremont, Calif.