Alibaba is an internet seller marketplace based in China. The company is not listed. Yahoo was the largest shareholder but Yahoo is widely expected to sell their stake and allow Alibaba to be listed.
Temasek Holdings purchase a small stake in Alibaba in October 2011 as staff and executives sold off some of their shares.
The China Investment Corporation invested in the company in September 2012, after it was separated from Yahoo. It was rumored that the CIC would take a stake worth around $2 billion.  It's far more likely the CIC invested significantly less than that.