Atmel Corp. (Nasdaq: ATML) shares rallied 9.8% to $16.10. Volume for the stock was 14.6 million shares, compared to an all-day average of 10.3 million, after the maker of computer chips used in household devices reported fourth-quarter earnings that beat Wall Street’s expectations late Tuesday.

Citigroup Inc. (NYSE: C) traded in 64.1 million shares, making it a volume leader, but still below its average of 546 million. Prices demurred 0.5% to $4.86.

Sierra Wireless Inc. (Nasdaq: SWIR) shares declined 26% to $11.47, on volume of 3.6 million shares, squashing its daily average of 260,000, after the wireless-modem maker reported fourth-quarter profit that missed estimates late Tuesday.