An activist investor has disclosed a stake in Twitter

 
Lynsey Barber
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Jana Partners bought up nearly three million Twitter shares (Source: Getty)

Twitter's share price received a much-needed bump on Monday after an activist investor disclosed a stake in the struggling social network.

Hedge fund Jana Partners has bought up nearly three millions shares, sending stock as much as two per cent higher in early trading in New York.

The stake was revealed in a filing by Jana with the SEC in which its long positions were declared.

Read more: Twitter stock jumps before the bell as earnings surpass expectations

Barry Rosenstein, founder and managing partner of Jana, successfully pushed for a buyout of US pet shop PetSmart and Safeway. ​He famously cut his teeth with Asher Edelman, the inspiration for Gordon Gekko's character in the film Wall Street.

The investment raises the prospect that it could push for chief executive Jack Dorsey to make changes.

It comes after the social network attempted to sell itself, however, firms such as Salesforce eventually declined to bid bringing the prospect of a sale to a halt.

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