Stocks that moved substantially or traded heavily Thursday on the New York Stock Exchange and Nasdaq Stock Market:
United Parcel Service Inc., down $1.40 at $78.25
The package delivery company said its first-quarter profit rose 6 percent, but the results were below Wall Street's expectations.
Aetna Inc., down $4.05 at $45.31
The health insurer said that its first-quarter profit fell 13 percent, and its adjusted earnings missed Wall Street expectations.
The Dow Chemical Co., down $1.23 at $34.85
The chemical maker said that its first-quarter earnings fell 50 percent due to restructuring costs related to closing some of its plants.
AstraZeneca PLC, down $2.55 at $43.36
The British drug maker announced that its chief executive is retiring as it reported a 44 percent drop in first-quarter net income.
Liz Claiborne Inc., up $1.20 at $13.88
The clothing company said that its first-quarter loss narrowed as sales of its Kate Spade and Lucky Brands goods strengthened.
Skechers USA Inc., up $2.04 at $16.96
The footwear maker reported a loss in its first quarter, but the company's results came in ahead of Wall Street expectations.
Ancestry.com Inc., up $1.27 at $25.71
The family history website said Wednesday that it will acquire its rival, Archives.com, for about $100 million in cash and assumed liabilities.
Equinix Inc., up $19.81 at $169.28
The Redwood City, Calif.-based data center operator on Wednesday reported first-quarter earnings and revenue above Wall Street's expectations.