The new round values the company at as much as $7 billion, the newspaper reported, around the same as recent transactions in Twitter stock on the secondary market.
“We don’t comment on our finances or speculation about our finances,” said a spokesman for Twitter.
In December, the company raised $200 million in a round led by venture-capital firm Kleiner Perkins that valued the firm at $3.7 billion. In February, venture-capital firm Andreessen Horowitz invested $80 million in Twitter through purchases on the secondary market that valued the company at about $4 billion.
Earlier today, it was revealed that Twitter acquired analytics firm BackType.
(Reporting by Sarah McBride and Alexei Oreskovic)