UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): May 16, 2025

QUANTUM-SI INCORPORATED

(Exact name of registrant as specified in its charter)

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Registrant’s telephone number, including area code: (866) 688-7374

N/A

(Former name or former address, if changed since last report)

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Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

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(a) On May 16, 2025, the Company held its Annual Meeting. At the Annual Meeting, the Company's shareholders voted on three proposals, each of which is described in more detail in the Company's definitive proxy statement filed with the Securities and Exchange Commission on March 20, 2025 (the “Proxy Statement”). At the Annual Meeting, there were 79,438,505 shares of Class A common stock and 19,937,500 shares of Class B common stock present or represented by proxy, which represented approximately 85.09% of the outstanding total voting power of the shares of Class A common stock and Class B common stock entitled to vote at the Annual Meeting (voting together as a single class), which constituted a quorum for the transaction of business. Holders of the Company’s Class A common stock were entitled to one vote for each share held as of the close of business on March 18, 2025 (the “Record Date”), and holders of the Company’s Class B common stock were entitled to 20 votes for each share held as of the Record Date.

(b) The following actions were taken at the Annual Meeting:

1. The following nominees were reelected to serve on the Board until the Company’s 2026 annual meeting of stockholders, based on the following votes:

2. The selection of PricewaterhouseCoopers LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2025 was ratified, based on the following votes:

3. The advisory vote of the compensation of the Company’s named executive officers, as described in the Proxy Statement, was approved, based on the following votes:

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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