Days after hinting that Berkshire Hathaway has bought Amazon stock, billionaire Warren Buffett’s conglomerate on Wednesday revealed the size of the Amazon stake as $904 million.

According to a 13 F filing at the Securities and Exchange Commission (SEC), Berkshire’s has taken 483,300 shares of the e-commerce giant at the end of the quarter that ended on March 31.

Based on the share price of Wednesday at the closing of the bell, the stake is priced $904 million.

Not among top Amazon shareholders

However, the mighty figure does not make Berkshire a top Amazon shareholder. Berkshire’s stake is only 0.1 percent of Amazon’s equity.

Buffett initially disclosed his company’s investment in Amazon, a day before the May 3 annual shareholder meeting in Omaha, Nebraska. But the size of the investment was still suspense.

The value investor has been prolific in his appreciation of Amazon founder and CEO, Jeff Bezos. However, Buffett also made clear that he was not personally responsible for Berkshire’s investment and attributed the pick to his trusted managers.

Buffett told CNBC: “I’ve been a fan, and I’ve been an idiot for not buying. One of the fellows in the office that manage money ... bought some Amazon so it will show up in the 13F."

Amazon shares moved up 0.1percent in after-hours trading, after the SEC filing.

Berkshire has a running partnership with Amazon and JPMorgan Chase in a joint healthcare venture named Haven.

Latest update on Berkshire’s holdings

The filing also revealed where all Berkshire has raised and reduced its holdings. It increased stakes in JPMorgan, Delta Air Lines, and Red Hat. 

The report to SEC disclosed that Berkshire had an 18 percent jump in its J.P. Morgan Chase stake at 59.5 million shares. In Red Hat, Berkshire’s holdings jumped to 22 percent and it owns 5.1 million shares.

At the same time, Berkshire slashed its exposure in Wells Fargo, Southwest Airlines, Charter Communications and Phillips 66.

Given that 13 F filings come after  45 days of the end of a quarter there is a possibility that the size of the investment may have changed. In this case, assuming there was no change Berkshire’s stake in Amazon, the value comes to $904 million based on the current prices.

Investors draw valued insights from Berkshire’s 13F filing. For that reason, it is a closely watched document and reflects the investment philosophies of Buffett and his team comprising Todd Combs and Ted Weschler.