Third Quarter Fiscal Year 2020 Financial Results

Our COVID-19 response ● ● ● Created COVID-19 response team with four key goals to guide decision-making 1. Protect the health, safety and livelihoods of employees 2. Reduce and mitigate operational and financial risks in business 3. Continue to deliver on commitments to customers and shareholders 4. Continue mission-critical work to support ongoing security of U.S. DHS classification as critical infrastructure enabling U.S. facilities to operate All employees who can work from home are doing so Adjusted workplace conditions to improve physical distancing and safety © 2020 Mercury Systems, Inc. 3

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