In an email to CNBC, Butler said he decided to retire after four years as Point72's head of human capital and will act as a consultant to the firm until the fall. "I am extremely proud of the transformational work we did with our Human Capital team during my tenure, finding new ways to source, select, develop, reward and retain our employees. We delivered on our Mission to create the greatest opportunities to the industry's brightest talent. "
Bonner said she doesn't know if the departures were a result of the suit, only to say "They left shortly after I filed."
"The real win I hope for is an intolerance of bad behavior at the firm," Bonner said. "And ultimately, of course, I hope for gender parity and equal pay."
When asked whether her job has changed at all since she filed the lawsuit, Bonner said, "My role is the same, but I'm a little less busy than I used to be."
Bonner, who has previously worked at the largest hedge fund in the world, Bridgewater Associates, conceded that sexism is an "industry-wide issue," but added that it's "particularly acute at Point72."
But so far no other women have publicly signed onto her lawsuit or filed a similar one against Point72. And few have come forward to call out any type of systematic bias on Wall Street.
"There's a reason more stories haven't come out, and it's not for lack of stories," Bonner said. "They haven't come out because of this culture of this small boys club that you really have to know other people to get jobs."
There are some other high profile gender bias cases on Wall Street. In March, a federal judge cleared the way for a class action lawsuit against Goldman Sachs. Four women who are former employees sued the bank in 2010 over allegations of systemic gender bias, including discrimination in pay and job promotion. Goldman has asked the court of appeals to review the decision.
As for what hedge funds and other financial institutions can and should be doing to make the environment better for women, Bonner said it's as simple as awareness by leadership.
"Choose to be intolerant of bad behavior," she said. "It may be uncomfortable to call someone out. But that's what actually changes a culture. And I would say for leaders at funds to actually embrace intolerance of poor behavior, would actually go a long way."