Starting off the week strong are Pandora Media Inc (NYSE:P), Solarcity Corp (NASDAQ:SCTY), Penn Va Corp. (NYSE:PVA). On the other end of the spectrum are Sarepta Therapeutics Inc (NASDAQ:SRPT), Dryships Inc. (NASDAQ:DRYS) and Tempur Sealy International Inc (NYSE:TPX).

Pandora

Pandora is today’s top performing stock

Topping off our midday gainers list this Monday is Pandora Media Inc (NYSE:P). The  internet radio service provider shot up +10.62%, hitting $30.40. Billionaire Steve Mandel holds a little over 20 million P shares, composing 2.33% of his fund. The investor paid an average price of $24.59 per asset. George Soros has a 78,000-share position as well.

Solarcity Corp (NASDAQ:SCTY) is the second stock in our midday gainers list. The solar systems company rose +9.13% today, reaching $64.88. As of September, Tiger Global holds 500,000 shares (0.29% of the fund), acquired at an average $36.89 each.

Rounding out today’s midday gainers list is Penn Va Corp. (NYSE:PVA), an independent gas company that increased +8.99% to $9.85. This was again good news for Soros, who holds a six-million-share stake in the company (0.45% of his portfolio).

Midday Losers

First on today’s midday losers list is Sarepta Therapeutics Inc (NASDAQ:SRPT), which dipped -10.86% to $17.86. Last quarter, Soros reported holding 655,000 shares of SRPT, his position in which he’s been increasing since September 2012.

Following Sarepta Therapeutics is Dryships Inc. (NASDAQ:DRYS), its stock price dropping -6.09% to $4.03 today. Billionaire Richard Chilton owns 3.2 million shares (0.32% of his portfolio), acquired at an average price of $2.77 per asset. Soros is also a shareholder here, with 590,000 assets (a 0.02% exposure).

The last stock on this Monday’s midday losers list is Tempur Sealy International (NYSE:TPX). Its stock price fell -5.72%, hitting $51.75. According to his last 13F, investor Jorge Lemann owns 720,000 shares, acquired at an average price of $43.90 each. This position composes 3.35% of the billionaire’s holdings. Another big player with stakes in TPX is David Einhorn, who owns 1.1 million shares of the company (0.9% of his holdings).