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Nikola Corp. is rescheduling its in-person Nikola World conference, where it was planning to show its electric pickup truck, as the company regroups in the wake of a stock sell-off and the departure of its chairman.

Nikola Corp. wants to put allegations of deception behind it with a push to showcase its own innovations and detail how it plans to get its clean-powered trucks to market.

Nikola Corp. got its first sell-equivalent rating, with the electric-vehicle startup downgraded to underperform from neutral at Wedbush, citing the loss of a driving force in founder Trevor Milton’s departure, and the threat posed to hydrogen fuel’s appeal by Tesla Inc.’s “eye-popping battery innovations.”

With Trevor Milton having stepped down as executive chairman of Nikola Motor Co. Sept. 21, the spotlight now falls to new chairman of the board Steve Girsky.

Trevor Milton has voluntarily stepped aside as executive chairman and board member of Nikola Corp., the electric truck company he created, it was announced Sept. 21.

Nikola Corp. is showcasing its innovations and detailing how it plans to get its clean-powered trucks to market. Here are photos of Nikola trucks.

Nikola Corp. made a fuller-throated denial of a report last week that claimed the electric-truck maker had deceived investors, accusing a short seller of mischaracterizations and distortions.

Just days after announcing a $2 billion agreement with General Motors, Nikola Corp. is fighting back against a “short seller” accusing the startup of deception and lying about its electric technology.

Nikola Corp. shares fell as much as 13% after Hindenburg Research published a report accusing the startup electric-vehicle maker of “deception” and lying about its technology.

Tesla Inc. shares slid on Sept. 8 after the electric-vehicle maker missed out on being included in the S&P 500 Index, taking investors who had bet on its entry to the benchmark by surprise.