Twitter shares sank to an all-time low before closing at their initial public offering price from 2013, as growth concerns intensified over the one-to-many messaging platform.
The shares on Thursday sank as low as $US25.92, falling for the first time below the $US26 level of Twitter's November 2013 IPO.At the close, Twitter ended at $US26 exactly, a drop of 5.8 per cent, amid a broad selloff in the overall US stock market.
Twitter stock vaulted to highs in late 2013 above $US70 on euphoria over the IPO but the company has been dogged by concerns on sluggish growth and a lack of profitability.
Last month, Twitter said its user base grew to 316 million worldwide, up by just two million from the prior quarter with the number of US users flat.
Twitter co-founder Jack Dorsey has assumed the role of interim chief executive as the company seeks a new leader.
A study this week by Pew Research Center found Twitter has failed to keep apace with rivals like Instagram and Pinterest.
The Pew report found 72 per cent of Americans who are online currently use Facebook, while Twitter's share remained stuck at last year's level of 23 per cent.
Meanwhile Instagram and Pinterest gained members.
Twitter, which lost $US137 million in the recently ended quarter, has never posted a profit.