A new study analyzed the birthdate of each of the top 250 billionaires who featured on Forbes magazine’s latest Billionaire List. Libra was the most common sign, with 27 notable billionaires including Ralph Lauren, Stefan Persson, Liliane Bettencourt, and Alice Walton. Visit Business Insider's homepage for more stories. Whether you’re a passionate Scorpio, a loyal Leo, or an empathetic Pisces, each zodiac sign has different personality traits. But did you know one zodiac sign, in particular, is the most likely to produce billionaires? A new study has figured out the most common star sign among the world’s wealthiest billionaires.