THESE are NASDAQ Pre-Market most active stocks, as of 8/26/2013, 9:30 A.M:

Mannatech, Incorporated (MTEX)

MTEX is currently trading at $22.82, up 1.66 percent with 7.84 percent change on 4,999 total traded shares

Avanir Pharmaceuticals, Inc. (AVNR)

AVNR is currently trading at $5.36, up 0.38 percent with 7.63 percent change on 300,180 total traded shares

ONYX Pharmaceuticals, Inc. (ONXX)

ONXX is currently trading at $123.66, up 6.70 percent with 5.73 percent change on 4,349,465 total traded shares

Merge Healthcare Incorporated (MRGE)

MRGE is currently trading at $2.54, up 0.13 percent with 5.39 percent change on 25,414 total traded shares

Amgen Inc. (AMGN)

AMGN is currently trading at $110.75, up 5.15 percent with 4.88 percent change on 303,399 total traded shares

James River Coal Company (JRCC)

JRCC is currently trading at $2.24, up 0.09 percent with 4.19 percent change on 7,728 total traded shares

Logitech International S.A. (LOGI)

LOGI is currently trading at $7.77, up 0.29, up 3.88 percent change on 38,787 total traded shares

Net 1 UEPS Technologies, Inc. (UEPS)

UEPS is currently trading at $11.10, up 0.35 percent with 3.26 percent change on 8,635 total traded shares

Independent Bank Corporation (IBCP)

IBCP is currently trading at $9.76, up 0.27 percent with 2.85 percent change on 3,800 total traded shares

Merrimack Pharmaceuticals, Inc. (MACK)

MACK is currently trading at $3.50, up 0.095 percent with 2.79 percent change on 4,627 total traded shares