Elon Musk reportedly wants to fire most Twitter employees, but he told investors...

• Elon Musk's plans for Twitter may have drastically changed since he agreed to the $44 billion purchase in April.

• Musk reportedly shared plans to grow Twitter's headcount by 3,600 in May. Now, he reportedly wants to slash it by 75%.

• Some analysts predict that the slowing advertising market may be partially to blame for the change.

Elon Musk's plans for running Twitter seem to be drastically different than what he proposed when he initially agreed to purchase the company in April.

In the early days after the agreement, Musk reportedly pitched an ambitious proposal for Twitter to investors that directly contradicts a recent report about his plan for mass firings.

According to a pitch deck viewed by the New York Times in May, Musk planned to grow Twitter's staff from 7,500 to 11,072 by 2025.

Less than 6 months later, Musk wants to slash Twitter's workforce by nearly 75% to a significantly scaled-down staff of 2,000, The Washington Post reports.

Neither Twitter nor Musk immediately responded to Insider's request for comment.

Ali Mogharabi, an analyst who covers Twitter for Morningstar, said he hadn't seen a significant change in Twitter's business to justify such a drastic change in headcount plans by Musk. However, external factors could be to blame.

"A lot has changed outside the business since Musk first spoke with Twitter employees. The uncertainty around the macro environment has certainly increased," Mogharabi said, referring to the slowdown in the overall economy.

He said that Twitter, which makes most of its money from advertising, could see revenue decline as advertisers get spooked by a potential recession.

While Musk's pitch deck from May opened the possibility for layoffs in 2023, there was no indication that he might fire more than 5,000 workers, based on the Times' report.

Mogharabi estimates that Twitter's potential revenue slowdown, combined with the possibility that investors helping to finance Musk's takeover of Twitter might be "demanding for Musk to make this business a cash cow," could account for his reported about-face.