Stocks are up Tuesday, with the Dow Jones Industrial Average up 0.38%, the Nasdaq up 0.76% and the S&P 500 up 0.55%. Today’s winners include a retailer beating earnings estimates and  an advertising firm entering into a merger. Meanwhile, today’s loser is a medical treatment company undergoing management changes.

Here are Tuesday’s market winners and loser.

Biggest Winners

Shares of Dex One Corporation (NYSE: DEXO) are up 47.42% to $1.83 on trading volume of 2.5 million shares. Dex One and SuperMedia Inc (NASDAQ: SPMD) are joining together in a stock-for-stock merger, with Dex One shareholders to own about 60% of new company. The 52-week high is $2.48.

Shares of Urban Outfitters Inc (NASDAQ: URBN) are up 15.95% to $36.27 on trading volume of 10.2 million shares. The company reported a second-quarter profit of 42 cents a share, beating the 33 cents a share analysts polled by Reuters were expecting. Before Tuesday, the 52-week high was $31.81.

Biggest Loser

Shares of ImmunoCellular Therapeutics, Ltd. (NYSE MKT: IMUC) are down 15.12% to $2.47 on trading volume of 1.7 million shares. Manish Singh resigned as CEO and director Monday, with founder and chairman John Yu now serving as interim CEO. The 52-week low is 98 cents.

Samuel Weigley

Follow him on Twitter: SWeigley