As Donald Trump raises his right hand to take the oath of office on Monday, the world’s three richest men — Elon Musk, Jeff Bezos and Mark Zuckerberg — will be there to witness it. The trio, who hold sway over companies worth trillions of dollars,

The world’s three wealthiest people are expected to pop up in Washington, D.C., for Donald Trump’s inauguration and surrounding events—joining a long list of other billionaire attendees.

All three have acted in ways beneficial to Trump — and are likely to financially benefit from Trump’s presidency.