Take a look at some of Thursday's midday movers:
Sempra Energy (SRE) was the worst performer on the S&P 500 after the energy company lowered the top end of its guidance for 2013 and offered a weak outlook for 2014.
Shares of software game maker Electronic Arts trended higher. A Morningstar analyst suggested that improved functionality of Microsoft's Xbox One may benefit makers of sports games. Stifel Nicolaus raised its price target on Electronic Arts to $26 from $22.
Seagate Technology hit a new all-time high after an upgrade to "buy" from "hold" at Deutsche Bank; price target raised to $46 from $40 per share.
Cirrus Logic shares were crushed after reports that the company's CEO Jason Rhode lowered the chip maker's longer-term view on margins citing pricing pressures in the smartphone market. Stifel Nicolaus downgraded Cirrus Logic to "hold" from "buy."
Semtech shares were lower after reporting first-quarter earnings in line with analysts' expectations.
Stocks at 52-week highs include Dover, Pandora and Stein Mart.
Stocks at 52-week lows include Vale and Xoom.
(Read More: CNBC's Market Insider Blog)
—By CNBC's Lori Spechler
Questions? Comments? Email us at marketinsider@cnbc.com
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