A record has been set for female leadership: More women are slated to take the reins of Fortune 500 companies than ever before.
Wednesday, pharmaceutical firm Mylan said Heather Bresch will succeed Robert Coury as CEO. Tuesday, IBM tapped Virginia "Ginni" Rometty to succeed Sam Palmisano, making her the first female CEO in the company's 100-year history. Both appointments are effective Jan. 1.
If no women step down before the end of 2011, there will be 18 women running Fortune 500 companies in 2012. Previously, there haven't been more than 16 female CEOs at Fortune 500 firms at the same time.