Prince Alwaleed bin Talal and his Kingdom Holding Company (KHC) have increased their ownership in Twitter Inc., in the past six weeks to a total of 34,948,975 shares, representing more than 5 percent of Twitter’s common stock with a market value of $1 billion.

This combined investment makes Prince Alwaleed and Kingdom Holding Company the second largest shareholders in Twitter.

As disclosed in filings with the US Securities and Exchange Commission, Prince Alwaleed holds 30,100,078 shares and KHC holds 4,848,897 Twitter shares.

The current ownership includes Twitter shares bought by Prince Alwaleed and Kingdom Holding Company in 2011 prior to the company’s IPO.

Founded in 1980, KHC is a publicly traded company which was listed on Tadawul (the Saudi Stock Exchange) in 2007.

KHC, chaired by Prince Alwaleed, is one of the world’s most successful and diversified business organizations, highly respected in the field of investments and recognized as an elite player regionally and internationally.