This works out to a slight discount to SingPost's closing price of 49 cents on June 7.
This leaves Alibaba with a stake of 11.34%, down from 14.56% previously.
Alibaba first invested in SingPost back in 2014, paying $312.5 million for a 10% stake. It increased its holdings subsequently.
SingPost's largest shareholder remains Singtel, which holds around 21%.
See also: Advanced Holdings’ Wong Kar King ceases to be controlling shareholder after 16.8% stake sale