Nanometrics Incorporated (NASDAQ:NANO)  fell 5.14% to $11.80 after Nanometrics, Inc. announced that it intends to offer shares of common stock in an underwritten public offering. Vincent Coates, the Company’s founder, also intends to offer shares of common stock in the offering. Piper Jaffray & Co. is acting as the sole book running manager of the offering.

Nordson Corporation (NASDAQ:NDSN) fell 4.30% to $55.34 after it posted lower-than-expected quarterly earnings, mainly hurt by charges For the first quarter, the company forecast earnings of 61 cents to 71 cents a share, including special items. It also forecast sales to increase in the range of 13 percent to 17 percent from a year ago. Analysts on average were expecting earnings of 59 cents a share, before items, on revenue of $199 million, according to Thomson Reuters For the latest fourth quarter, the company reported a loss of $209 million, or $6.22 a share, compared with earnings of $30.7 million, or 90 cents a share, in the year-ago period.

Paychex, Inc. (NASDAQ:PAYX) reports Q2 EPS of $0.35, higher than the analyst estimate of $0.33. Revenue for the quarter was $496.6 million, which compares to the estimate of $496.39 million.