NEW YORK (AP) — A look at the 10 biggest percentage gainers on Nasdaq at 1 p.m.:

Zipcar Inc. rose 27.6 percent to $7.71.

Kayak Software Corp. rose 27.4 percent to $39.54.

Spherix Inc. rose 27.2 percent to $9.30.

Digital Generation Inc. rose 19.2 percent to $10.11.

Ubiquiti Networks Inc. rose 18.9 percent to $12.07.

SciQuest Inc. rose 15.5 percent to $15.20.

Digital Ally Inc. rose 15.0 percent to $5.75.

Isis Pharmaceuticals Inc. rose 14.7 percent to $8.80.

Span-America Medical Systems Inc. rose 14.4 percent to $19.64.

ACI Worldwide rose 13.6 percent to $43.57.