The Airbnb founders and a Saudi prince are among the latest to take Bill Gates' Giving Pledge

Bill Gates, who has been on a mission to get other super-wealthy individuals to give away their fortunes, has landed a few new billionaires for his "Giving Pledge."

The latest to take the pledge include Salesforce CEO Marc Benioff, the three cofounders of Airbnb (Brian Chesky, Joe Gebbia and Nathan Blecharczyk) along with Saudi Prince Al-Waleed bin Talal and Intuit founder Scott Cook.

Bill and Melinda Gates, along with billionaire pal Warren Buffet, launched the effort back in 2010 with Oracle founder Larry Ellison, Qualcomm founder Irwin Jacobs, eBay co-founder Pierre Omidyar and noted tech venture capitalist John Doerr among the first to sign on.

The announcements came just ahead of an appearance by Bill and Melinda Gates, who are speaking at the Code Conference.

"We don't pool money but we share experiences," Bill Gates said on stage with Walt Mossberg. "It's been an amazing thing."

Mossberg clarified that you have to be a billionaire to officially join the pledge, which ruled him out.

"You are going to have to raise your ticket prices," Gates quipped.

Mossberg also clarified that Donald Trump hasn't joined the pledge.

"We haven't approached him," Melinda Gates said. "We don't have any immediate plans to approach him. I think we should let this cycle play out."

Other newly taking the pledge include:

• Margaret and Sylvan Adams (Israel)
• Jack and Laura Dangermond (United States)
• Henry Engelhardt, CBE and Diane Briere de l’Isle-Engelhardt, OBE (United Kingdom)
• Sir Tom and Lady Marion Hunter (United Kingdom)
• Robert and Arlene Kogod (United States)
• Kiran Mazumdar-Shaw (India)
• PNC and Sobha Menon (UAE)
• Gary K. Michelson (United States)
• Gensheng Niu (China)
• Liz Simons and Mark Heising (United States)
• Dr. Herbert and Nicole Wertheim (United States)

This article originally appeared on Recode.net.

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