I looked the 13D up when I read that on twitter as
Post# of 30027
If it's new 13D, then something big is happening...
What Is Schedule 13D?
Schedule 13D is a form that must be filed with the U.S. Securities and Exchange Commission (SEC) when a person or group acquires more than 5% of any class of a company's equity shares. There are several pieces of relevant information that must be disclosed within 10 days of the transaction. Schedule 13D is also known as a "beneficial ownership report."
KEY TAKEAWAYS
When a person or group acquires 5% or more of a company's shares, they must report it to the Securities and Exchange Commission.
Among the questions Schedule 13D asks is the purpose of the transaction, such as a takeover or merger.
If the beneficial owner's holdings change by 1% or more, they must amend their Schedule 13D.
https://www.investopedia.com/terms/s/schedule13d.asp