This summer Mary Sammons, resigned as CEO of RiteAid.
This morning I read of Brenda Barnes' resignation as CEO of Sara Lee to focus on her health after suffering a stroke earlier in the year.
For the past few years, I've been able to post photos of the 15 women F500 CEOs, whom I call "your virtual mentors" in my book No Ceiling, No Walls. The important message they convey comes through their wide ranging diversity. They come from different backgrounds and lead with different styles.
It's doubtful that we'll get back up to 15 any time soon (although I hope I'm proved wrong).
Susan Colantuono is CEO of Leading Women and author of No Ceiling, No Walls. She blogs on networking for PINK Magazine. Follow her on Twitter.