Mashable :The Female Founders Series is presented by American Express OPEN. For the full State of Women-Owned Businesses Report, visit openforum.com/women. American Express OPEN salutes, celebrates and wants to help fuel the future of women business owners.Women comprise 47% of the U.S. workforce, but just 25% of the STEM workforce. While the tech sector has a reputation of being occupied by white males, women are making a go at careers in STEM fields. (Culture)