Twitter lifted its character limit Wednesday for direct messages between users, saying it would help make the private side of Twitter "more powerful and fun."
Twitter shares fell to an all-time low on Monday, weighed down by doubts that the popular messaging platform isn't growing fast enough to thrive.
Jack Dorsey would have to give up his post at Square if he's to become CEO of Twitter.
Payments company Square has informed US regulators privately that it is exploring going public with a stock market debut, according to reports Friday.
Shares of high-speed trading company Virtu Financial Inc. rose nearly 17 percent in their stock market debut Thursday.
A website devoted to adultery is out to woo investors with a public offering of stock in Britain.
Chinese regulators accused e-commerce giant Alibaba of permitting sales of fake goods and hurting consumers in a report that was withheld until now to avoid disrupting the company's U.S. stock market debut.
China's Alibaba Group is seeking to raise up to $24.3 billion in its upcoming IPO—an amount that would be the most raised by a company in a stock market debut.
Twitter said Tuesday it overhauled its user display to make the messaging service "more visual," as it ramps up competition against photo-sharing services like Instagram.
Shares in the company behind GoPro cameras, used to capture sports action from players' perspectives, jumped more than 30 percent on their first day of trading.