Capital One Financial Corp (NYSE:COF) is down over 1% to $55.74 in pre-market trading, after the announcement that ING Groep will sell its stake of more than 9% in the company The public offering will come in around 54 million shares. Capital One bought ING Direct USA back in February for $9.1 billion in cash and stock, making ING the largest shareholder of the company. As of yesterday, ING’s stake in Capital One was valued at around $3 billion.