On CNBC's “Mad Money Lightning Round,” Jim Cramer recommended not to pull the trigger here on Rivian Automotive, Inc. (NASDAQ:RIVN).

Rivian, on September 16, announced it is expanding its U.S. manufacturing footprint with a new central facility in Georgia. The company held a groundbreaking ceremony this week at Social Circle, marking a pivotal step toward building its next generation of electric vehicles.

Energy Fuels Inc. (NYSE:UUUU) is at its “52-week high, and I still would not go against it. And I've been behind this one a long, long time,” Cramer said.

HC Wainwright & Co. analyst Heiko F. Ihle, on Sept. 17, maintained Energy Fuels with a Buy and raised the price target from $12 to $16.25.

“You can still buy” Gilat Satellite Networks Ltd. (NASDAQ:GILT) stock, Cramer said.

On Sept. 9, Gilat announced a private placement of $66 million to institutional and accredited investors.

When asked about Ambarella, Inc. (NASDAQ:AMBA), he said, “I think it reflects all the good news already, and I'm going to have to say no to that one.”

On the earnings front, Ambarella, on Aug. 28, reported better-than-expected second-quarter EPS and sales and guided third-quarter sales above estimates.

AST SpaceMobile, Inc. (NASDAQ:ASTS) is “your spec,” Cramer said.

UBS analyst Christopher Schoell, on Sept. 9, downgraded AST SpaceMobile from Buy to Neutral and lowered the price target from $62 to $43.

Price Action:

• Rivian shares surged 6% to settle at $15.24 on Monday.
• Energy Fuels shares gained 4.8% to close at $15.57.
• Gilat Satellite shares rose 1.8% to settle at $11.84 on Monday.
• Ambarella shares gained 7.1% to $88.81 during the session.
• AST SpaceMobile shares gained 8.3% to settle at $48.85.

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