Twenty years ago, Mark Zuckerberg founded Facebook (Meta (META)) along with Eduardo Saverin, Andrew McCollum, Dustin Moskovitz and Chris Hughes when they were all undergraduate students at Harvard University. The site started as a type of online directory for Harvard students and later expanded to other Ivy League schools and eventually most universities in the U.S. and Canada. By 2006, anyone with a valid email address and above 13 years old could access the site. Since then, Zuckerberg has turned the social platform into a full-fledged tech conglomerate.

As one of the most defining social platforms of the digital age, Facebook’s development into what we know today as Meta also represents the rapid changes in how people communicate online. Oftentimes the company outpaces lawmakers who try to set rules for the way its products affect users, from their impact on mental health to data gathering and privacy policies.

In 2021, Zuckerberg rebranded Facebook into Meta Platforms, marking a new chapter for the company that focuses on metaverse, A.I., and social platforms beyond Facebook. Today, Meta’s offerings include Instagram, Threads, WhatsApp, Reality Labs and more. Its leadership team is one of the most stable in the tech industry. All of Meta’s top executives have been with the company for over a decade. Many of them rose to the top through internal promotions and have held management and technical roles across departments.

Below are the 11 people overseeing Meta’s various social platforms and tech efforts:

Mark Zuckerberg, 39, cofounder, chairman and CEO 

As one of the original founders, Zuckerberg owns about 13 percent of Meta stock worth more than $140 billion. Some of the major projects he has recently ushered in include Meta’s virtual reality initiatives through its Reality Labs unit, end-to-end encryption of messaging platforms and generative A.I. models.

Zuckerberg has sat before the U.S. Senate multiple times to testify on behalf of his company concerning issues around personal data gathering, hate speech and misinformation. He is expected to testify again this year over child safety issues on Meta’s Facebook and Instagram.

Javier Olivan, 47, chief operating officer

After working at Meta for 14 years in roles such as chief growth officer and vice president of central products, Olivan was promoted to chief operating officer in 2022, replacing prominent tech executive Sheryl Sandberg. In a Facebook post announcing his new role, he wrote, “I don’t anticipate my role will have the same public-facing aspect, given that we have other leaders at Meta who are already responsible for that work.”