Quanterix Investor Presentation — November 2019

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November 6, 2019Quanterix Earnings Call | Q3 2019 | November 6, 2019 | 2

Forward- Looking Statements & Non- GAAP Financial Measures

This presentation contains “forward -looking” statements that are based on our beliefs and assumptions and on information

available to us as of the date of this presentation. Forward -looking statements include all statements that are not historical facts.

We may not actually achieve the plans, intentions or expectations disclosed in our forward -looking statements. Forward -looking

statements involve known and unknown risks, uncertainties, assumptions and other factors that may cause our actual results,

performance or achievements to be materially different from any future results, performance or achievements expressed or

implied by the forward -looking statements. The risks and uncertainties that we face are described in our most recent filings with

the Securities and Exchange Commission. Except as required by law, we assume no obligation to update these forward -looking

statements, even if new information becomes available in the future.

To supplement the Company’s financial statements presented on a GAAP basis, the Company has provided certain non- GAAP

financial measures, including Non- GAAP revenue, Non- GAAP gross profit and Non- GAAP gross margin. Our non- GAAP

adjustments exclude ( i) the impact of $1.3M in revenue recognized in Q3 2018 in connection with the termination of our license

agreement with bioMerieux SA; and (ii) acquisition- related purchase accounting adjustments in connection with our acquisitions

of Aushon Biosystems in Q1 2018 and Uman Diagnostics in Q3 2019. Management uses these non- GAAP measures to

evaluate the Company’s operating performance in a manner that allows for meaningful period- to-period comparison and analysis