Today’s midday gainers are Boyd Gaming Group (NYSE:BYD), Computer Sciences Corporation (NASDAQ:CSC) and JDS Uniphase Corp (NASDAQ:JDS). On the negative side, Amazon.com, Inc. (NASDAQ:AMZN), U.S. Silica Holdings Inc (NYSE:SLCA), and Textura Corp (NYSE:TXTR) experienced steep losses.

David Tepper

Tepper wins with Boyd Gaming

Up +10.88%, gaming company Boyd Gaming Group is our top midday gainer. Of the billionaires tracked by iBillionaire, only David Tepper has a stake in the US entertainment properties operator, although it has just a 0.18% allocation in his fund.

Following Boyd is computer giant CSC, up +10.32% as news broke of higher-than-expected Q3 and full-year earnings. With $3.23 billion in revenue last quarter and per-share earnings of $0.98, it beat out Wall Street numbers by 16.5%. David Einhorn and Ray Dalio hold stakes in the company, which comprises 3.20% and 0.01% of their portfolios, respectively.

Last up is JDS Uniphase, which increased +6.68%. The manufacturer of communications and optical products exceeded its very own guidance, with income of $8.8 million versus $4.1 million for the same quarter of the previous year. George Soros holds an allocation of 0.20% in the Californian technology provider.

Midday Losers

Soros finds himself on the losing end today as well. Textura dipped -10.61%, and US Silica Holdings fell -8.80%. Although they represent a very small portion of his holdings (0.01% and 0.10%), Soros is down -0.26% today overall. The picture isn’t clear as to why Textura declined, given that it reported better-than-expected revenue but with quarter losses of over $4 million.

Also closing out the week on the rocks is Amazon, the share price of which had declined -9.50% at midday today – the result of some discouraging numbers. The retail behemoth posted that its operating results will be in the range of $200 million losses to $200 million profit for the current quarter, with net sales likely up 13% to $19.9 billion. It is still adjusting operating costs, which will result in an increase in its Amazon Prime fees to what could be as much as $40. It is Chase Coleman and Steve Mandel who are losing here, as they hold 3.98% and 1.08% allocations, respectively.