Stocks making the biggest moves premarket: CarMax, Tesla, BlackBerry and others

Check out the companies that are making news.

The stock of CarMax jumped 5.1% in premarket trading after the auto retailer beat estimates on the top and bottom lines for its latest quarter, as well as posting comparable dealer sales that were above analyst forecasts.

After CEO Musk said he has sold enough stock to reach his goal of selling 10% of his shares, the stock rose 3.4% in the premarket. Musk has increased his holdings in the company due to exercising options.

The company reported a breakeven quarter, on an adjusted basis, compared with analyst forecasts of a 7 cents per share loss. The communications software maker saw revenue beat estimates, but current quarter forecasts for some of its products are shy of analyst estimates.

Bernstein upgraded Caterpillar's stock to "outperform" from "market perform." Caterpillar rose 1.6% in the premarket. Bernstein said that concerns about the machinery upgrade cycle are overblown.

CalAmp lost an adjusted 8 cents per share for its latest quarter, which was worse than analysts had expected. The maker of wireless data communications products and software saw revenue fall short of forecasts, and component shortages were a key factor impacting its results. CalAmp plummeted in premarket action.

The Chinese e-commerce company's stock fell 4% in the premarket after Atlantic Equities lowered its rating to "neutral" from "overweight." The firm is concerned that Tmall and Taobao won't see improvement in their performances in the near term.

The Olive Garden parent was upgraded to a buy from a hold at Stifel Financial, which pointed to the company's upbeat quarterly results last week. The announcement that Gene Lee will retire in May caused the stock to fall. The company added 1.1% in premarket trading.

Williams-Sonoma was upgraded to a buy from a hold at Loop Capital, which thinks the household products retailer has a "premier" brand and will continue to benefit from the Pandemic.

The company was named a "top pick" for the year 2022, at which time it pointed to an accelerated move into the mainstream for digital assets.