Already the chief of SpaceX and Tesla, Elon Musk has publicly added his name as CEO of another-Neuralink.

In a new Tesla securities filing, his biography was updated to include Neuralink in the list of companies where he is CEO. He's still listed as just a founder of The Boring Company, another of his side projects.

Musk has called himself CEO of Neuralink before, and he was widely assumed to be overseeing the company, but Neuralink disclosed little about its governance since the brain computer interface company started in 2016.

The company in August filed paperwork in Nevada listing its directors, which include Neuralink co-founder DJ Seo as president of the company; Jared Birchall, the head of Musk's family office; Musk ally and SpaceX board member Antonio Gracias; Joe Lonsdale from 8VC; and Scott Nolan from Founders Fund.