The best-paid women at S&P 500 companies earn 18% less than men.

Fifty-four women serve as finance chief at S&P 500 companies, up from 40 a year earlier.

As activist investor Ackman takes stake, board said to discuss replacing McDonald.

As activist investor Ackman takes stake, board said to discuss replacing McDonald.

Networking service said to be looking for directors, including at least one woman.