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Investor Relations : Jess Lubert Juniper Networks ( 408 ) 936-3734 jlubert@juniper.net Media Relations : Leslie Moore Juniper Networks ( 408 ) 936-5767 llmoore@juniper.net Exhibit 99.1 JUNIPER NETWORKS REPORTS PRELIMINARY SECOND QUARTER 2021 FINANCIAL RESULTS SUNNYVALE , Calif . , July 27 , 2021 - Juniper Networks ( NYSE : JNPR ) , a leader in secure , AI - driven networks , today reported preliminary financial results for the three months ended June 30 , 2021 and provided its outlook for the three months ending September 30 , 2021 . Second Quarter 2021 Financial Performance Net revenues were $ 1,172.3 million , an increase of 8 % year - over - year and an increase of 9 % sequentially . GAAP operating margin was 7.3 % , a decrease from 8.3 % in the second quarter of 2020 , and an increase from 2.6 % in the first quarter of 2021 . Non - GAAP operating margin was 15.8 % , an increase from 14.3 % in the second quarter of 2020 , and an increase from 12.1 % in the first quarter of 2021 . GAAP net income was $ 62.0 million , an increase of 1 % year - over - year and an improvement from a net loss of $ 31.1 million in Q1'21 , resulting in diluted income per share of $ 0.19 . Non - GAAP net income was $ 141.0 million , an increase of 21 % year - over - year , and an increase of 43 % sequentially , resulting in non - GAAP diluted earnings per share of $ 0.43 . The reconciliation between GAAP and non - GAAP results of operations is provided in a table immediately following the Preliminary Net Revenues by Geographic Region table below . " We reported better than expected results , a second consecutive quarter of double - digit product revenue growth and record product orders during the June quarter , " said Juniper's CEO , Rami Rahim . " Our experience - first strategy is working , our teams are executing well and the investments we have made both in our customer solutions and our sales organization are enabling us to capitalize on improving end - market conditions . We are entering the second half with strong momentum , and I am increasingly confident in our long - term growth prospects . " " We delivered a strong financial performance during the June quarter as revenue , non - GAAP gross margin , non GAAP operating margin and non - GAAP earnings per share each exceeded our expectations , " said Juniper's CFO , Ken Miller . " The investments we have made are paying off and should position us to not only deliver sustained top line growth , but also to deliver improved profitability over time . " Page 1 of 11