1. What does Quantum-Si do? 2. Where is Quantum-Si Incorporated? 3. Where is Quantum-Si ’s corporate headquarters? 4. On what exchange does Quantum-Si trade? What is its stock ticker? 5. What is Quantum-Si’s CUSIP number? 6. Who is Quantum-Si’s auditor? 7. Who is Quantum-Si’s transfer agent, and how do I contact them? 8. How can I purchase Quantum-Si stock? 9. What is Quantum-Si ’s fiscal year end? 10. Does Quantum-Si have a corporate governance program? 11. How do I obtain copies of Quantum-Si ’s financial documents, including quarterly (10-Q) and annual (10-K) reports? 12. When is your next earnings release date? 13. How do I contact Quantum-Si investor relations? 14. How can I receive financial update emails? 15. How can I find out about upcoming events?

1. What does Quantum-Si do?

Founded by Dr. Jonathan Rothberg in 2013, Quantum-Si is focused on revolutionizing the growing field of proteomics. The company’s suite of technologies are powered by a first-of-its-kind semiconductor chip designed to enable single-molecule next-generation protein sequencing, and digitize proteomic research in order to advance drug discovery and diagnostics beyond what has been possible with DNA sequencing.

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2. Where is Quantum-Si Incorporated?

Quantum-Si is incorporated in Delaware.

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3. Where is Quantum-Si ’s corporate headquarters?

Quantum-Si ’s corporate headquarters are located at 530 Old Whitfield St., Guilford CT 06432.

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4. On what exchange does Quantum-Si trade? What is its stock ticker?

Quantum-Si common stock trades on the Nasdaq Stock Exchange under the ticker QSI.

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5. What is Quantum-Si’s CUSIP number?

Quantum-Si ’s CUSIP number is 74765K 105.

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6. Who is Quantum-Si’s auditor?

Quantum-Si’s auditor is Deloitte & Touche LLP.

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7. Who is Quantum-Si’s transfer agent, and how do I contact them?

Quantum-Si’s transfer agent is Continental Stock transfer & Trust Company. They can be reached by phone at (212) 509-4000 or by email at cstmail@continentalstock.com.

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8. How can I purchase Quantum-Si stock?

Shares of Quantum-Si can be purchased through the broker of your choice.

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9. What is Quantum-Si ’s fiscal year end?

Quantum-Si ’s fiscal year end is December 31.

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10. Does Quantum-Si have a corporate governance program?

To review Quantum-Si ’s corporate governance policies, please visit the Corporate Governance section of the website.

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11. How do I obtain copies of Quantum-Si ’s financial documents, including quarterly (10-Q) and annual (10-K) reports?

Quarterly and annual reports and other investor materials are available under the SEC Filings section of the website. Additionally, all SEC filings can also be viewed directly on the SEC website.

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12. When is your next earnings release date?

Quantum-Si will issue a press release that includes the date of our next quarterly earnings call. These releases will be posted on the News and Press Releases section of our website, including the details for accessing the conference call and/or webcast to discuss the results.

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13. How do I contact Quantum-Si investor relations?

If you wish to contact Quantum-Si’s investor relations team, please send an email to QSI-IR@westwicke.com.

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14. How can I receive financial update emails?

To automatically receive financial information by email, please visit the Email Alerts section of this website.

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15. How can I find out about upcoming events?

Please visit the Events section of the Investor Website.

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Investor contact

Mike Cavanaugh

Managing Director, Westwicke

Phone: (617) 877-9641

Email: QSI-IR@westwicke.com