The Nasdaq said Wednesday that Shareholder.com "inadvertently" released Twitter's quarterly results ahead of schedule.
"The posting was caused by an operational issue that exposed the release on Twitter's IR website for approximately 45 seconds," the exchange said in a statement. "During those seconds the site was scraped by a third party that publicly disseminated the earnings information."
The Nasdaq hosts Twitter's investor relations page through Shareholder.com.
The microblogging site's first-quarter earnings leaked at 3:07 p.m. on Tuesday and led the company to halt trading in its stock. Shares of Twitter closed Tuesday down 18 percent.
The company's stock continued its downward move in early trading Wednesday as it shed more than 5 percent.
Twitter reported quarterly profit of 7 cents a share, slightly above consensus estimates. Revenue, however, missed even the most pessimistic of the 36 analyst estimates compiled by Thomson Reuters.
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Average monthly active users (MAUs) came in at 302 million for the quarter, in line with expectations and up 18 percent year over year. However, mobile MAUs—which accounted for about 80 percent of the total—fell short of Wall Street's estimates.
—CNBC's Jacob Pramuk contributed to this report.