Post Holdings Inc., down $2.67 at $44.45
The maker of Grape-Nuts, Honey Bunches of Oats and Raisin Bran cereals said fiscal second-quarter net income fell 59 percent.
Theragenics Corp., up 54 cents at $2.03
Juniper Investment raised its buyout bid for the medical device company to $2.25 to $2.30 per share from a previous offer of $2.05 to $2.10 per share
Jos. A Bank Clothiers Inc., down $3.31 at $42.90
The men's clothing company said its fiscal first-quarter earnings will likely come in below Wall Street estimates on lower sales.
Tesla Motors Inc., up $11.04 at $87.80
Shares of the electric car maker continued to soar on optimism about the boost the company could get from its Model S sedan.
Overstock.com Inc., up 78 cents at $26.28
Shares of the online retailer hit a 52-week high a month after it posted strong results for the first quarter.
Theravance Inc., up $6.26 at $41.20
Irish drugmaker Elan plans to pay $1 billion for future royalties from four respiratory treatments being developed by Theravance and GlaxoSmithKline.
Warner Chilcott PLC, up 90 cents at $18.91
A Cantor Fitzgerald analyst boosted her price target for the drugmaker on hopes it will reach a deal to combine with Actavis Inc.
Perion Network Ltd., up $1.34 at $13.94
The company, which offers instant messaging and other online services, said first-quarter net income grew by more than sevenfold.