Kate Greer
Now, we know that the two have been dating for years and are not officially married, but they’re worth mentioning. Kate Greer has been dating Jack Dorsey for years, and who is this billionaire you ask? Well, Dorsey founded Square Inc. and Twitter.

Kate Greer
No big deal. The couple does not have kids, but Dorsey has referred to his companies as his children. Fortunately, Kate has the luxury of working with a lovely charity organization called Campinteractive. The company teaches kids new technological skills.
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