The compensation awarded to female CEOs, on average, also outstrips the $14.3 million average paid to all the CEOs of the 100 largest publicly held companies that had reported through early April, according to pay tracker Equilar and compensation consultant Towers Watson.

Now’s the time investors pay particularly close attention to what they’re paying the CEO as corporate filings – called proxy statements – are in from nearly all S&P 500 companies. Women have a long way to go to match or even rival men in the CEO office in terms of numbers, but they’ve made strong strides in size of pay. Total pay for this analysis was calculated using the Securities and Exchange Commission’s guidelines, which includes salary and the present value of options and stock grants.

The only current S&P 500 female missing from the analysis is Heather Bresch, CEO of the drugmaker Mylan (MYL) since October 2007. 2014 compensation data was not available. Safra Ada Catz’ pay as co-president of Oracle was included in this analysis since she was named co-CEO after the end of the technology company’s fiscal year.