It was from the current round of fundraising from venture capitalists.
However, Twitter has surpassed expectations, with Insight Venture Partners, the New York venture capital firm, leading a consortium of new and existing investors, according to a report in The Wall Street Journal.
Other new investors include T Rowe Price, a fund manager. Existing backers, Spark Capital and Institutional Venture Partners, are also taking part.
The new round will bring Twitter's total funding to $155m, a staggering amount of money given that it has little revenues.
This week, one of Twitter's investors suggested its .