Its pay gap tilts in favour of women, which Diageo attributes to developing, promoting and recruiting female talent into senior roles within the company.
The gender pay gap in these companies is considerably lower than the all industries average at 14.1 per cent.
The agency's director Libby Lyons says while the pay gap is shrinking at a frustratingly slow pace, more companies are analysing their remuneration data to check for discrepancies in men and women's pay packets, and taking action to bring them into line. We calculate gender pay gaps across the data set by industry and by manager and occupational categories, excluding CEO salaries.
But the report did find that more organisations were taking action to address this pay disparity.
In better news, more employers included a formal policy or at least a strategy to support employees experiencing domestic violence, up 3.8 per cent to 43.1 per cent.
"Technicians and Trades workers" recorded the largest gender pay gap, with a 26.7 per cent difference worth $28,042.
"Other positive developments include an increase in managers having KPIs related to gender equality and more women being appointed to manager roles", she said.
"While I am pleased to report such great progress - and I commend these employers for their efforts -our gender equality indicators tell us there is much more to be done", says Lyons.
From 6 April 2017, the United Kingdom government made it mandatory, by law, for employers in Britain with more than 250 staff members to report their gender pay gaps.
The dataset indicates little change to the gender balance of Australia's boardrooms (at 24.9 per cent). "As the guardians of organisational strategy, boards must step up if we are to continue building momentum for change", Lyons added.
"The rate at which women are being promoted and appointed to manager roles has increased since past year and is proportionately higher than the rate of women's current representation in management", the report said.
"Men still dominate the faces around these top tables and the data suggests boards are not engaging with gender equality issues".
While public sector organisations are not required to submit information to the WGEA, yesterday CSIRO's Data61 this week revealed that women make up 22 per cent of its workforce.
At the event, Data61 CEO Adrian Turner called the lack of diversity in the industry a "crisis".