Investor Presentaiton

Reconciliation of Free Cash Flow m W $ in millions Net cash provided by operating activities. Less purchases of property and equipment 2018 2019 $638.9 $808.0 $1,083.7 2020 LTM Q3'21 Q3'20 YTD Q3'21 YTD $1,429.4 $787.2 $1,132.9 Less proceeds from IP matter (53.0) (92.2) (125.9) (50.0) (176.9) (93.6) (144.6) (50.0) Free cash flow Free cash flow Margin $585.9 $715.8 $907.8 $1,252.5 $643.6 $988.3 32% 33% 35% 40% 35% 42% O Fortinet, Inc. All Rights Reserved. 58

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