I'm Carl Kintanilla. You're listening to CNBC's Tech Check. Our show is live weekdays at 11 a.m. Eastern. Listen in.

Good Monday morning. Welcome to Tech Check. I'm Carl Kintania with Deirdreboza and John Ford. Today, Jack steps back. Shares of Twitter, surge as Jack Dorsey steps down from his CEO role.

We'll talk about what it means for that company and the broader message in tech.

Then stocks rebounding a bit this morning after that Omicron sell-off Friday.

The latest on the variant and the buying opportunities still out there this morning.

Finally, it's Cloud Week here on Tech Check.

John is live in Vegas as Amazon's Reinvent Conference kicks off ahead of his exclusive

with AWS CEO Adam

Solipski later on today. Dee?

Well, Carl, we will of course start with Twitter CEO,

Jack Dorsey, stepping down from his role as CEO as first reported by our own David Faber

and passing on the reins to Parag Agrawal.

The company's chief technical officer Dorsey will remain on the board until his term

expires in 2022. We've been watching shares all morning. They have come down from when David Faber

first reported about the switch. They're narrow up about 4%. And guys, I'm looking at his announcement,

his memo to employees that he also posted on Twitter. And part of it, he says that founder-led companies are severely limiting and a single point of failure.

When you look across the landscape at the biggest tech companies, you see that that has bode well, putting in company insiders to replace the founders at Microsoft, Apple, Alphabet. You've seen all of those

co-founders sort of take a back seat and the people that replaced them doing a very good job.

Of course, John, Amazon just did that this summer. It's still early for Andy Jassy, but the

trend so far has been pretty good. Yeah, and I think though it's important to put Twitter in a whole different context than those companies.

Market cap of this company is under $60 billion.

I mean, there's so, what, let's see, DocuSign, I think is bigger than this.

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