For the quarter ended Dec. 31, F5 Networks earned $1.62 a share compared with $2.16 in the year-earlier period. The latest adjusted number: $2.55.
A survey of analysts by FactSet estimated that the company earned $1.77 a share on a GAAP basis, or an adjusted $2.43, on sales of $565.9 million.
For the fiscal 2020 second quarter ending March 31, F5 expects to earn an adjusted $2.14 to $2.17 a share as adjusted revenue ranges $580 million to $590 million.
FactSet's survey is looking for an adjusted $2.42 a share in the second quarter on sales of $571.2 million.
Shares of the company were trading after hours down around 4%. They closed the regular session down 2.3% at $132.70, on a day when the tech-heavy Nasdaq Composite Index dropped almost 1.9%.
Through regular trading on Monday, F5 Networks shares had fallen 5%. They're up 9.3% from their 52-week low above $121 set in late August. And they're 23% below their 52-week high above $173, set late last February.