In 2015, Twitter boosted its revenue to $2.2 billion, mostly from advertising, compared with $1.4 billion in 2014. But the company has never turned a profit, losing $521 million last year, a bit less than the $577 million in 2014.
Twitter has launched a variety of new ad products but still appears far from profitability. Its share price on Wall Street reflects scepticism. Its initial public offering in 2013 priced shares at $26, and the stock leapt briefly to as high as $69 that year, but has been on a downward trend ever since.
In recent months, Twitter shares have moved up slightly from all time lows, and hovered around $14 to $17, which gives it a market value of around $11 billion.