Today’s daily gainers are AngloGold Ashanti Limited (NYSE:AU), IAMGOLD Corp (NYSE:IAG), Sandisk Corporation (NASDAQ:SNDK), and daily losers are International Business Machines Corp.(NYSE:IBM), Atlas Energy LP (NYSE:ATLS), Acacia Research Corp (NASDAQ:ACTC).

John Paulson

John Paulson wins with AngloGold Ashanti

Gold firm AngloGold Ashanti Limited (NYSE:AU) is our top gainer today, following a stock price increase of +10.71% to reach $15.04. Billionaire John Paulson holds 27.9 million AU shares, which represent 2.82% of his portfolio. He paid an average price of $14.08 per share.

IAMGOLD Corp (NYSE:IAG), another gold mining company, climbed +9.12% to $4.84 today. John Paulson has a position in IAG as well, with 3.8 million shares (0.12% of his holdings). He still has a lot of ground to make up for with this one, though – he paid an average per-share price of $15.83, meaning a -69.44% loss.

Last up is tech company Sandisk Corporation (NASDAQ:SNDK), its stock up +7.79% to $67.84. This firm is a favorite among many billionaires. David Tepper holds more than one million SNDK shares (0.93% of his fund), bought at $45.38 each. Richard Chilton owns 223,000 shares, corresponding to 0.36% of his fund and purchased at an average price of $40.42 per share. George Soros holds 150,000 shares (0.10% of his fund), having paid an average price of $40.66.

Daily Loser

First up on our list of losers today is International Business Machines Corp. (NYSE:IBM), which dipped to $174.13, a -6.75% decrease, after falling short in its earnings expectations. Warren Buffett wasn’t likely pleased by this. He owns 68.1 million IBM shares, representing 14.62% of his portfolio and purchased at an average $167.46 per share. Richard Chilton was affected as well. The investor holds 16,000 shares, representing 0.08% of his holdings and acquired at an average price of $196.08.

Another firm with a big loss today is Atlas Energy LP (NYSE:ATLS), which dropped -5.93%. The oil and gas company is now trading at $47.26 after Robert W. Baird downgraded its rating to neutral. As of June, the only billionaire tracked by iBillionaire with a position in ATLS is Leon Cooperman, who holds 3.9 million shares, representing 3.15% of his fund. Despite the tough day for the stock, Cooperman has gained +187.54% with this position, having paid an average price of $16.34 per share.

The last stock on our daily loser list is Acacia Research Corp (NASDAQ:ACTC), which is down -6.47%, hitting $19.37. With 2.3 million shares, the tech company represents 0.56% of George Soros’ portfolio. Soros has been reducing his position in Acacia as of late, and from December to June, his allocation decreased -36%. The billionaire paid an average price of $32.68 per share.