In February 2022, the business-led FTSE Women Leaders Review set FTSE350 companies a 40% target for women on boards and in leadership teams by 2025, up from a previous target of 33%.
The new goal was given official backing by the Financial Conduct Authority, which regulates listed companies, in April 2022, with the watchdog also including broader diversity targets.
In contrast to countries such as Belgium and France, Britain does not have a mandatory quota system for women on boards at listed companies, making the progress more remarkable, the report said.
Just over a decade ago, 152 of the FTSE 350 Boards had no women on them.
Now there are women on every board and the vast majority of companies have three or more, it added.