New-Wave Investment Holding Co. Ltd., a British Virgin Islands company, was established and is controlled by Charles Chao, Sina's president and CEO, and other members of Sina's management.
Sina, based in Shanghai, said it will use the proceeds for acquisitions and general corporate purposes.
Under the terms of the financing agreements, shareholders of New-Wave are primarily among Sina's management team, with participation from alternative investment management firm CITIC Capital Holdings Ltd., private equity firm FountainVest Partners and private investment partnership Sequoia Capital China as preferred shareholders.
Shares rose 6 cents to $44.72 in midday trading.