Ryan Lochte, Venus Williams, Other Celebs Trade Stocks For Cantor Fitzgerald 9/11 Charity Event

Commemorating the 11th anniversary of 9/11 wasn't just about quiet tributes and solemn reflection.

Trading firm Cantor Fitzgerald & BGC Partners, which lost 658 employees on 9/11, marks the date by holding a lively charity fundraiser. The company donates all of its trading revenue from that day and invites A-listers to join in, according to

While the more than 100 participating celebs, including Ryan Lochte, Venue Williams and Michael J. Fox, were eager to partake, and support the more than 100 charities, some struggled with the on-the-job challenges.

“I’m just looking at the screens, and it’s really confusing, but they’re helping me out,” Lochte told the New York Post.

The veteran participants slipped right into the role and were excited to be back.

“It’s really and honor and a pleasure,” Regis Philbin told

The event, which raised an estimated $12 million, drew all walks of stars, including famed musicians, athletes, actors and politicians.

50 Cent's trades benefitted the his G-Unity Foundation, which provides grants to nonprofits, and Carmelo Anthony was there answering phones and making sales, along with a number of his Knicks teammates, to support his eponymous charity, the Carmelo Anthony Foundation. The organization aims to help underserved communities in the areas of education, recreation and community outreach.

"This is one of the few days that we have a chance to just come together, as a city, as a state, just come together and really focus on the people that we lost on 9/11," Anthony told ESPN. "We will never forget that moment. For me, this is the least I could do."