Elon Musk quietly had a third child with his Neuralink executive Shivon Zilis

It’s not clear how many children Musk has in total, but he has 11 living who are publicly known: five with his first wife, the author Justine Wilson, three with the musician Grimes, and three with Zilis.

Musk cofounded Neuralink and serves as the co-CEO of the company, which develops brain-computer technology. The news about another child with Zilis comes a couple weeks after a Wall Street Journal report detailed Musk’s “boundary-blurring relationships” with female employees at SpaceX.

One former SpaceX employee accused Musk of asking her to have his babies on more than one occasion, according to the report. She declined the offer and later said she was denied a raise, according to the report. She eventually left the company and received an exit package valued above $1 million, the Journal reported.

Musk has talked publicly about his views on the risks of declining birth rates since 2017, and has said he considers the issue to be the biggest threat to civilization. He has also said he’s encouraged his friends to have more children. A day after Business Insider reported he had fathered twins with Zilis, he posted on X that he’s doing his best “to help the underpopulation crisis.”

Musk isn’t the only tech mogul to want to reproduce as a way to save humanity. The ideology is reportedly gaining traction among some powerful figures who believe they can counteract the risks of falling birth rates by producing genetically superior offspring.

Zilis and Musk did not immediately respond to requests for comment.