Stocks making the biggest moves premarket: Rivian, SolarEdge, Sphere Entertainment and more

cnbc.com:

Check out the companies making headlines before the bell:

Rivian Automotive — Shares popped 3.3% in the premarket. Evercore ISI upgraded Rivian Automotive to outperform from in line, and raised its price target, saying the electric truck maker could be the next Tesla and BYD.

Sphere Entertainment — The stock jumped more than 7% after the entertainment and media company opened its Sphere venue in Las Vegas with a show from U2 on Friday night. The Sphere will host live concerts and sporting events.

Insulet — Shares gained 3.4% in premarket trading. Jefferies upgraded the medical device maker to buy from hold, saying investors should take advantage of recent underperformance to add exposure.

Sunnova Energy International — UBS initiated coverage of the solar company with a buy rating, sending shares up 1.5% in premarket trading. The Wall Street firm believes Sunnova is well positioned to take market share thanks to increasing demand for third-party-owned residential solar systems. Its $16 price target implies nearly 53% upside from Friday's close. 

Clorox — The consumer products company rose 3.3% in premarket trading after D.A. Davidson upgraded Clorox to buy from neutral. The investment firm said that Clorox's stock could rally as the company gives investors more clarity about the fallout from an August cyberattack.

AMC Entertainment — Shares of the entertainment company moved up 2% before the bell after it announced that Renaissance: A Film by Beyoncé, would be distributed in the U.S. in December.

SolarEdge Technologies — The solar stock dropped 2.7% after Barclays downgraded SolarEdge Technologies to equal weight from overweight, saying price cuts are «inevitable» next year for the company.

Nvidia — Shares rose more than