The scarce number of women in Silicon Valley tech firm C-Suite positions just got smaller with the announced departure of Sheryl Sandberg as chief operating officer at Facebook parent Meta Platforms (FB) – Get Meta Platforms Inc. Class A Report.

Sandberg, who is Meta Chief Executive Officer Mark Zuckerberg’s number two, informed the company on May 28 that she would resign her position after a transition period, according a Securities and Exchange Commission Form 8-K filing. The exact date of departure was not listed in the filing, but the company’s Board of Directors is expected to appoint current Chief Growth Officer Javier Olivan as the new COO, the filing said.

Sandberg told CNBC that she was leaving to personally focus on her philanthropy that particularly affects women, according to a June 1 report.

While Sandberg did not hold a CEO position, she was still one of the most powerful women among the Silicon Valley technology company C-Suites as Zuckerberg’s right-hand woman. Meta is also proactive in placing women in C-Suite corporate positions, as women hold five of the 13 C-Suite positions on its website, which is about 38%