Elon Musk today runs several more companies than he did in 1999, when the photo on the left was taken.
AP / Richard Bord/WireImage via Getty Images
- Some of Silicon Valley's biggest names are in their tech bro era.
- It wasn't always like this — many Big Tech CEOs have shed more nerdy personas from their startup days.
- Here's a look at tech's most influential executives then and now.
Mark Zuckerberg isn't the only tech CEO whose style has noticeably evolved over the years.