Quanterix Investor Presentation — August 2019

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August 6, 2019Quanterix Earnings Call | Q2 2019 | August 6, 2019 | 2

Forward- Looking Statements

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.Quanterix Earnings Call | Q2 2019 | August 6, 2019 | 3

I. Strategic and Financial Progress –Kevin Hrusovsky –Chairman, CEO

i. Company Direction & Q2 Highlights

ii. Progress against 2019 Goals & Priorities

iii. Transforming Medicine: Neurology Momentum Update

II. Financial Report –Amol Chaubal –CFO

III. Summary of QTRX Opportunity -Kevin Hrusovsky

IV. Q&AQuanterix Earnings Call | Q2 2019 | August 6, 2019 | 4

Disruptive Market, Technology and Growth

Total Quanterix Revenue Growth

% Growth excl. Collaboration Revenue

62%Q2 and 1H 2019 Highlights

•Q2 Revenue $13.5M, 57% growth; 60% growth 1H

•Q2 GM 51.2% versus 46.0% last yr; 580 bps increase 1H