Updated from 8:33 a.m. to include comments from Twitter and information on new departures.

NEW YORK (TheStreet) -- Twitter (TWTR) is scheduled to report its second-quarter results on Tuesday afternoon, and while most analysts are waiting to hear an update on the company's CEO search, staff turmoil at Twitter may go much deeper than just the C-suite.

More than 450 employees -- 12% of the company's staff -- have left Twitter in the past year, according to The Financial Times. That number is likely conservative because The Financial Times gathered data from LinkedIn (LNKD) , and not all Twitter employees have LinkedIn accounts, but it certainly shows that there is some chaos at Twitter. Despite the departures, Twitter's total headcount has increased 18% over the last year, according to The Financial Times.  

When reached for comment on these numbers, a Twitter spokesperson responded: "Great teams want to work on something people use daily, and Twitter is such a product. This, together with the impact people can have on the world through Twitter, helps us attract the best employees."

The high turnover shouldn't come as much of a surprise given the amount of attention the company has been receiving both from analysts who are dissatisfied with the company's growth in users and revenue, and from commentators critical of Twitter's lack of diversity and "brogrammer" culture. Twitter's disappointing first-quarter results eventually led to Dick Costolo stepping down as CEO and Jack Dorsey coming in as interim CEO while the company continues to look for a permanent CEO.

Since April, shares of Twitter have dropped more than 34% amid concerns about slowing user growth.

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