• Elon Musk went to New York on Halloween to meet with advertisers and visit the Twitter office.
  • He brought his mom, Maye Musk, along to the meeting where execs asked about un-banning Trump.
  • The billionaire then tweeted a joke about Trump during the meeting.

Elon Musk brought his mom, Maye Musk, to a meeting with Twitter advertisers, Bloomberg reported.

At around 2 a.m. on Halloween, the Twitter CEO arrived in New York with plans to visit his company's office and convince advertisers that the app was safe.

In the afternoon, he held a meeting with Horizon Media — a top ad agency which represents the likes of Burger King, Corona, and Geico. Two advertising executives from Twitter also came along, as well as Musk's friend Jason Calacanis, and Maye Musk.

Calacanis is a tech investor who had been part of Musk's inner circle at Twitter – giving him advice on the company, but never holding an official position. After mass layoffs, staff were told to listen to Calacanis' podcast to understand why cuts were necessary.

It is unclear why Musk's mother also came to the meeting. Later that night, she also accompanied her son to a costume party hosted by Heidi Klum.

Maye has previously appeared with her billionaire son at this year's Met Gala, and on Saturday Night Live.

Horizon Media CEO, Bill Koenigsberg, told Musk that some of his clients had heard about the meeting, according to Bloomberg. He said: "They all asked 'Is he going to get Donald Trump back on the platform?'"

Musk answered that many people were asking him the same question, before pulling out his iPhone and composing a tweet during the meeting: "If I had a dollar for every time someone asked me if Trump is coming back on this platform, Twitter would be minting money!"

Musk reportedly paused before posting, and asked everyone in the meeting whether they liked his joke. One Twitter executive was opposed to the tweet, but Musk laughed and posted it anyway. The executive was fired later that week, Bloomberg reports.

Twitter and Horizon Media did not immediately reply to Insider's request for comment, which was sent outside normal working hours. 

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