The pitch is a smart move for Musk, as it turns what looks like a liability — running half a dozen companies at the same time — into an asset.

Nowhere was that vision clearer than on Sunday, when Musk began touting the benefits of having Tesla as a part of his business universe.

Musk's The Boring Company revealed in an X post that its tunneling machine, the Prufrock-3, had emerged inside the Gigafactory Texas' expansion. The tunnel that is being constructed will soon be used to transport Tesla's Cybertrucks.

"Cybertunnel will be online July," the post said.

It's not just hardware. Musk is looking to leverage the software built by his $24 billion AI startup, xAI.

The billionaire was livestreaming himself playing Diablo on X when he revealed that Tesla's cars could come installed with xAI's chatbot, Grok, in the future.

Besides cross-pollinating his companies' tech, Musk is also promising multiple windfalls to Tesla shareholders if they stick with him.

On Saturday, Musk said he would prioritize "longtime shareholders of my other companies, including Tesla" if any of his businesses were to go public.

"Loyalty deserves loyalty," he wrote on X.

Musk might not have spelled it out, but his X post sounded like a veiled reference to the long-rumored IPO for his satellite internet business, Starlink.

To be sure, this isn't the first time Musk has leveraged his network of businesses.

xAI had earlier sold investors on the benefits of being a part of what it called the "Muskonomy," Bloomberg reported in February, citing a pitch deck it had obtained.

In its pitch deck, the company said that Tesla and X were its strategic partners, and it would provide them with training data.

Similarly, when Musk bought Twitter in October 2022, he quickly brought in software engineers from Tesla and SpaceX to review the social media company's code base.

In fact, some of Musk's lieutenants are still double hatting at his companies. For instance, SpaceX's principal security engineer, Christopher Stanley, is also X's head of information security.

"The right thing for Tesla at this time is for Elon to continue to be at the helm, and this ratification of the compensation plan is exactly about that," Tesla board chair Robyn Denholm told CNBC on June 6.

Representatives for Musk did not immediately respond to a request for comment from BI sent outside regular business hours.