Celsion Corporation (NASDAQ: CLSN) shares climbed 48.1 percent to $3.04 after withdrawing stock offering.
Hornbeck Offshore Services, Inc. (NYSE: HOS) shares climbed 31.2 percent to $2.59 after the company reported a $300 million credit facility.
Whole Foods Market, Inc. (NASDAQ: WFM) shares surged 26.7 percent to $41.87 after Amazon announced its plans to acquire Whole Foods for $42 per share.
Myomo Inc. (NYSE: MYO) shares gained 21.4 percent to $10.93 after jumping 33.01 percent on Thursday.
IMPINJ Inc (NASDAQ: PI) shares jumped 12.7 percent to $52.69.
Nanometrics Incorporated (NASDAQ: NANO) shares climbed 10.6 percent to $27.54. Stifel Nicolaus upgraded Nanometrics from Hold to Buy.
Finisar Corporation (NASDAQ: FNSR) surged 10.5 percent to $28.34. Finisar reported in-line earnings for its fourth quarter, but issued a weak forecast for the current quarter.
NovaBay Pharmaceuticals, Inc. (NYSE: NBY) shares rose 8 percent to $2.70.
Rudolph Technologies Inc (NYSE: RTEC) shares gained 7 percent to $24.75. Stifel Nicolaus upgraded Rudolph Technologies from Hold to Buy.
The Hackett Group, Inc. (NASDAQ: HCKT) rose 6 percent to $15.59. SunTrust Robinson Humphrey initiated coverage on Hackett Group with a Buy rating and a $19.00 price target.
Keysight Technologies Inc (NYSE: KEYS) gained 4.5 percent to $38.16. Baird upgraded Keysight Technologies from Neutral to Outperform.
Valeant Pharmaceuticals Intl Inc (NYSE: VRX) shares climbed 4 percent to $12.59. Cantor Fitzgerald initiated coverage on Valeant with an Overweight rating and a $18.00 price target.