Four law firms have initiated investigations into Grana y Montero (NYSE: GRAM) for possible securities violations. The stock dropped 88 cents to close at $2.44.
Novavax Inc. (Nasdaq: NVAX) narrowed losses for the fourth quarter. The stock price rose 25 cents to close at $1.63.
HTG Molecular Diagnostics Inc. (Nasdaq: HTGM) will begin offering its direct target sequencing chemistry in the company's VERI/O laboratory as a service beginning in the first quarter of 2017. The stock price more than doubled by leaping $1.95 to close at $3.18.
Shutterstock Inc. (NYSE: SSTK) reported fourth quarter earnings and revenue that missed expectations sending the stock price plummeting $8.61 to close at $43.02.
Fourth quarter earnings for AmTrust Financial Services Inc. (Nasdaq: AFSI) fell short of expectations. Shares of the property and casualty insurer plunged $5.32 to close at $22.34.
La Jolla Pharmaceutical Co. (Nasdaq: LJPC) reported positive results from the ATHOS-3 Phase 3 study of LJPC-501 in patients with catecholamine resistant hypotension sending the stock price soaring $15.25 to close at $35.12.
Applied Optoelectronics Inc. (Nasdaq: AAOI) reported sharply higher fourth quarter earnings as revenue soared. Shares of the fiber optic networking products supplier leaped $8.51 to close at $45.98.
Acacia Communications Inc. (Nasdaq: ACIA) reported impressive fourth quarter earnings and revenue but the company forecast current quarter results that fell short of analyst expectations. The stock price plunged $9.39 to close at $54.04.
Hi-Crush Partners (NYSE: HCLP) priced its public offering of approximately 20 million units at a discount sending the stock price plummeting $3.20 to close at $17.35.
North American Offshore Ltd. (NYSE: NAO) upsized its public offering to 40 million common shares priced at the discounted price of $1.25 per share. The stock price tumbled 80 cents to close at $1.25.