On April 4, Elon Musk and his Twitter shares made headlines.

Musk secured a 9.2% stake in the company, making him the largest shareholder.

However, Musk started acquiring shares back in January.

Within four months, he had acquired an over 5% stake in the company.

A new lawsuit claims that Musk did not notify financial regulators when he reached that threshold.

The lawsuit is represents Twitter investors who sold stock between March 24 and April 1.

They claim that they missed a chance at profits due to Musk’s non-disclosure.

Musk has faced trouble for “misleading investors” in 2018 due to his tweets.

“I want to be clear. I do not respect the SEC,” Musk said on “60 Minutes” in 2018.