Twitter, Agios, LeapFrog, Restoration Hardware and InterDigital are big market movers

NEW YORK, N.Y. – Stocks that moved substantially or traded heavily Friday on the New York Stock Exchange and the Nasdaq Stock Market:


Twitter Inc., up 6 cents to $35.90

Dick Costolo is stepping down as CEO of the messaging startup and will temporarily be replaced by co-founder Jack Dorsey.

Restoration Hardware Holdings Inc., up $1.39 to $96.22

The furniture and housewares company reported better-than-expected first-quarter results and boosted its guidance.

LeapFrog Enterprises Inc., down 53 cents to $1.54

The developer of the LeapPad2 tablet for children reported worse-than-expected fiscal fourth-quarter profit and revenue.

T-Mobile US Inc., up 88 cents to $39

Dish Network Corp. is exploring options for a bid to buy the mobile services company, according to the Wall Street Journal.


Agios Pharmaceuticals Inc., down $12.46 to $110.13

The biotechnology company reported promising results from an ongoing early stage study of a potential leukemia treatment.

InterDigital Inc., up $3.31 to $59.65

The wireless research and development company increased its stock buyback authorization to $400 million from $300 million.

Amicus Therapeutics Inc., up $1.05 to $14.34

The biotechnology company priced an offering of about 17 million shares at $13.25 apiece and expects gross proceeds of $225 million.

Aveo Pharmaceuticals Inc., down 17 cents to $2

The biotechnology company is facing potential delays in moving a potential colon cancer treatment to late-stage development.