These quotes and average results from its second quarter caused Facebook's stocks to drop a whopping 19 per cent overnight.
Facebook lost Dollars $119 billion in market value as the share price plunged - reportedly the largest single-day loss for any public company in history.
On the eve of Zuckerberg's scheduled testimony previous year, Facebook withdrew the proposal, which would have let him keep control of the social media company even while selling shares to fund his philanthropy.
Slowing revenue growth initially pulled the stock down almost 9 in after-hours trading on Wednesday before losses picked up on the margin outlook.
Facebook's decline significantly outpaced the $91 billion that Intel lost in September of 2000, during the original dot-com bust. The company was worth over 630 billion dollars the previous day.
The earnings covered the company's first full quarter since the Cambridge Analytica privacy scandal erupted. Questions of data privacy, fake news proliferation and user growth have dogged the company.
Facebook remains a quickly growing company that sees its revenues increase by over 30% yearly, but the news of decelerating growth was enough to discourage some investors.
New European privacy rules, inspired in part by Facebook's relentless mining of its own users' data, are starting to hamper the company's advertising business.
Zuckerberg reiterated in the earnings call last week that the company's major investments in security will lower its profitability. While users still encounter adds on Instagram stories, there are a lot less of them.
The S&P 500 technology index fell 2.0 per cent, the most among the major S&P sectors. These moves have likely impacted Facebook's earning projections and user numbers, which led to the 24 percent reduction in its stock value.
There are several reasons for the declining revenue growth rate.