Elon Musk

The world’s richest man with a net worth around $200 billion according to Bloomberg News, has long been a power user of the social network. As owner, he refers to himself as “Chief Twit” and on Monday a financial filing from the company confirmed he was the official chief executive. Musk already helms several other companies, including Tesla and SpaceX. As Twitter’s new owner, he wields tremendous power to steer the company, from changing the site’s approach to content moderation to enacting dramatic cuts to Twitter’s workforce, to pushing users to pay for using the site.

Musk has a hands-on management style, and has spoken in the past about sleeping in the Tesla factory to make sure work was on schedule. He’s taking a similar approach to Twitter already, with one employee who spoke on the condition of anonymity saying that Musk was micromanaging individual projects. On Twitter, he’s been busy replying to suggestions from individuals about how to change the company, as well as responding to complaints about accounts being unfairly locked.

Jason Calacanis

A tech investor, podcast host and longtime Musk associate, Calacanis’ texts with Musk were among those that appeared in court documents released as part of Twitter’s lawsuit to force Musk to buy the company. Calacanis pitched Musk ideas on how to change Twitter before the acquisition. And now that Musk is formally the owner, Calacanis has been on Twitter soliciting feedback from users on what kind of features they want to see.

In his private texts to Musk, Calacanis suggested that Twitter require employees return to the office for at least two days a week, which he said would reduce the workforce by 20 percent, through “voluntary departures.” He also criticized Twitter’s premium features and proposed expanding verified badges to more users, the messages show. In private texts, he told Musk that becoming the new chief executive of Twitter is his “dream job.” He’s not CEO, but Musk has kept Calacanis around as part of the transitionand his title is listed internally as a software engineer. On Monday, Calacanis tweeted that he was in New York to meet with advertisers on behalf of Twitter.

Jared Birchall

Birchall is one of Musk’s closest advisers and manages the billionaire’s personal fortune as head of his family office since 2016. He’s a former Morgan Stanley wealth manager and helped set up the financing for Musk’s Twitter buyout.

Birchall also serves as chief executive of Neuralink, Musk’s brain interface tech start-up and as a director of his tunneling company, Boring Co., though it’s unclear if he actually wields power there or is simply in charge on paper. Birchall is Musk’s fixer, helping arrange the purchase and sale of his houses and the hiring of security guards, according to Bloomberg. Over the last few days, Birchall has been one of the people strategizing inside Twitter.

Alex Spiro

A lawyer at New York law firm Quinn Emanuel, Spiro has become a bigger and bigger figure in Musk’s orbitover the past few years. He helped Musk win a defamation lawsuit for his comments insulting a cave diver he got into a Twitter fight with over the rescue of a Thai boys soccer team several years ago. Spiro has also represented a roster of famous athletes and musicians, including Aaron Hernandez in his 2016 murder trial and Jay-Z in a business dispute over a perfume endorsement deal.When Twitter sued Musk for backing out of his deal to buy the company earlier this year, Spiro helped lead the billionaire’s defense. Musk gave up on getting out of buying Twitter, but he’s kept Spiro on.

The lawyer is now managing the legal, government relations, policy and marketing teams at Twitter, according to four people familiar with internal discussions who spoke on the condition of anonymity. He was also involved in the layoff plan that went into effect in recent days.

David Sacks

Sacks has worked with Musk since the two were part of PayPal’s team in the early 2000s. They both made fortunes when the company sold,and Sacks has invested in a string of successful start-ups since then, including Airbnb, Facebook and Uber. He’s also become a conservative media figure and a major Republican donor who helped fund the successful recall of San Francisco DA Chesa Boudin earlier this year. In September, he wrote an article advocating for a referendum in Russia-occupied eastern Ukraine asking residents if they wanted to secede from Ukraine and join Russia, an idea Musk later tweeted himself.

Sacks recently appeared in a Twitter company directory with an official Twitter email and the title “staff software engineer,” according to photos obtained by The Post.

Sriram Krishnan

Krishnan helps lead cryptocurrency investments at Silicon Valley venture capital heavyweight Andreessen Horowitz, which invested $400 million in Musk’s Twitter acquisition. He’s also worked in product development positions at Facebook, Snapchat and, from 2017 till 2019 at Twitter. On Monday he said he was helping Musk out at Twitter “temporarily.” It’s unclear exactly what Krishnan is doing, but he’s the only one in Musk’steam that has actually worked at Twitter before.

Elizabeth Dwoskin and Faiz Siddiqui contributed to this report.