A10 Networks shares are down nearly 18 percent today after the company reported mixed fourth-quarter results Tuesday.

The company's revenue performance was linked to strong service provider segment, which was up 28 percent year-over-year, but the enterprise segment fell 11 percent quarter-over-quarter, causing revenues to lag.

Moreover, A10's non-GAAP losses amounted to 20 cents per share, missing the Thomson Reuters analyst consensus of 16 cents per share. A10 shares were down 86 cents (17.6%) at $4.03 in early afternoon trading today.

A10 claimed it saw higher win rates spanning all markets and products without any discounts or changes in pricing. Strong customer metrics and win rates should eventually correlate to higher revenues, as well as consistent opex improvement, writes Catharine Trebnick, analyst at Doughtery & Co., in a report issued this morning. But at the moment, she "recommend[s] investors remain on the sidelines."

A10's fourth-quarter revenues grew 7 percent year-over-year and 4 percent quarter-over-quarter, to $45.2 million.  The company's growth might have been aided by new product releases, such as version 4.0 of Advanced Core Operating System (ACOS) along with new policy engine Harmony. 

GAAP net loss came in at $16.0 million, or 26 cents per share, compared to a net loss of $5.6 million, or 71 cents per share, in last year's fourth quarter. (The company went public in March, creating more shares for that "per-share" math.)

Non-GAAP net loss for the 2014 Q4 was $12.0 million, an increase from $4.2 million at the same time last year. Non-GAAP net loss for 2014 was $29.3 million, compared with a Non-GAAP net loss of $15.5 million for 2013.