Quarterly Results

GAAP Results (unaudited)

4Q 2017
4Q 3Q 4Q Period Change
FY 2017 FY 2017 FY 2016 Q-T-Q* Y-T-Y*
Revenue $744.4 $728.7 $716.2 2.2% 3.9%
Gross margin 43.7% 45.0% 44.5% (1.3)% (0.8)%
Operating expense $269.9 $246.1 $258.9 9.7% 4.2%
Operating margin 7.5% 11.3% 8.3% (3.8)% (0.8)%

* For a full description and reconciliation of Non-GAAP (unaudited) measures see CIENA’s Q4 2017 Earnings Release

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