Business is big on many fronts for President Donald Trump as he is sworn in for his second term today in Washington, DC (His $TRUMP meme coin reached about 11 billion dollars in market value since its inception on Friday.)

Trump took his oath of office inside the Rotunda of the US Capitol rather than outside the Capitol's West Front because of the cold weather (it's currently 27 degrees Fahrenheit in the nation's capital). Ronald Reagan made the same decision in 1985.

An insider said NPR The Capitol Rotunda can only seat about 750 people, making it even more meaningful who was in attendance. According to the Congressional Joint Committee on Inaugural Ceremonies (JCCIC), the inaugural platform is usually reserved for the current president and vice president and their families; the president-elect and vice-president-elect and their families; members of the Supreme Court and other high-ranking officials.

Despite the square footage challenges, a cavalcade of business leaders, such as Walmart CEO Doug McMillon, were in attendance at the swearing-in ceremony, reports Fox Business.

Related: Donald and Melania Trump launch meme coins

Some well-known tech titans on the exclusive guest list include the CEO of Tesla Elon MuskCEO of Meta Mark ZuckerbergCEO of Apple Tim CookCEO of Amazon Jeff Bezosand CEO of Google Sundar Pichai.

CEO of TikTok Shou Zi Chew also participated.

In a column for time, Jeffrey Sonnenfeld and Steven Tian write, “These business leaders are rushing to meet with Trump now, as would any president and Americans of all political persuasions, because their engagement is essential to the good of our nation and our economy, both in terms of making the most of possible opportunities, as well as avoiding potential pitfalls.”