Silver Lake Resources, which was the only company in the 200 last quarter without a female director, is still yet to rectify its lack of diversity.

Perseus Mining joined Silver Lake as having no female board representation, following the resignation of Sally-Anne Layman due to her appointment to the board of Newcrest Mining.

However, Perseus said in September it was searching for a female replacement for Layman, as well as an additional female director.

In positive news, the proportion of women on ASX 200 boards has risen from 29.8% to 32.1% over the past 12 months to October 31.

The largest companies continue to lead the way, with the proportion of female directors in the ASX 20 reaching 36.2%.

There are now 113 ASX 200 companies that have reached 30% women on their boards.

Of the 87 companies that are yet to reach the target, 76 are just one female appointment away from reaching 30%.

Female board representation among the ASX 300 rose from 27.4% to 29.6% over the past 12 months.

"Now, more than ever, the diversity of leadership roles is critical to ensure an effective post-COVID recovery," AICD CEO and managing director Angus Armour said.

"This continuing upward trend indicates that the message about diversity is being heard. I am confident that we will see the ASX 300 reach the aggregate target in the very near future.

"We are calling on all companies who have not yet made active steps towards gender-balance in their leadership to consider the full pool of board-ready candidates for their next appointment."

Chair of the 30% Club Australia, Nicola Wakefield Evans, said the latest statistics were encouraging.

"We will continue to target those companies on the ASX who fail to recognise not only the obvious benefits of board diversity, but the risks to reputation and performance for those who lag behind," she said.