According to US law firm Sanford Heisler, the collective action offer extended to 9,000 current and former female employees of KPMG US has received approximately 200 opt-ins since the first week of October.
Sanford Heisler is a public interest class-action litigation law firm representing plaintiff and former KPMG US manager Donna Kassman, whose allegations of gender discrimination in 2011 sparked the legal battle.
Upon opting in, the 200 individuals have become named plaintiffs in the case and Sanford Heisler described the result as "a very good response rate for so early in the 90 day response period".
Speaking to International Accounting Bulletin earlier this month, senior litigation counsel Kate Mueting said that although the number of women likely to join the class-action remained was difficult to predict, similar cases had seen 1,000 individuals opt in out of 9,000 approached.
KPMG US has committed to "vigorously defend itself" and reaffirmed its commitment to supporting women in the workplace in statement in October.