Jan 16 (Reuters) - A10 Networks Inc:
* A10 NETWORKS ANNOUNCES PRELIMINARY FOURTH QUARTER 2017 RESULTS
* SEES Q4 2017 NON-GAAP EARNINGS PER SHARE $0.05 TO $0.06
* - EXPECTS Q4 GAAP EARNINGS PER SHARE IN RANGE OF BREAK-EVEN TO $0.01 PER SHARE Source text for Eikon: Further company coverage: