Elon Musk became the first trillionaire when SpaceX (NASDAQ:SPCX) went public recently.

A large decline in SpaceX stock has Musk narrowly hanging onto the title of trillionaire.

Here’s the latest on his net worth. • What is going on with SPCX stock?

SpaceX Stock Declines SpaceX stock declined Monday, falling 16.43% to $154.60 and dropping near the lows set since the company went public.

The drop in value for the space company, in which Musk owns a large stake, was a major factor in his net worth declining by $152.3 billion on Monday.