(AP) — Twitter's new owner and Tesla CEO Elon Musk sold nearly $4 billion worth of Tesla shares, according to regulatory filings.

Musk, who bought Twitter for $44 billion, sold 19.5 million shares of the electric car company from Nov. 4 to Nov. 8, according to Tuesday's filings with the Securities and Exchange Commission.

He sold $7 billion of his Tesla stock in August as he worked to finance the Twitter purchase he was trying to get out of at the time. In all, Musk has sold more than $19 billion worth of Tesla stock since April, including those in Tuesday's filings, likely to fund his share of the Twitter purchase.

The takeover of Twitter has not been smooth and the social media platform has seen the exodus of some big advertisers in recent weeks in including United Airlines, General Motors, REI, General Mills and Audi.

Musk acknowledged “a massive drop in revenue” at Twitter, which heavily relies on advertising to make money.

Most of Musk's wealth is tied up in shares of Tesla Inc. On Tuesday, his personal net worth dropped below $200 billion, according to Forbes, but he is still the world's richest person.

Copyright 2022 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed without permission.