UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 10-Q/A

Amendment No. 1

(Mark One)

For the quarterly period ended June 30, 2021

OR

For the transition period from                      to                     

Commission File Number: 001-40632

CYTEK BIOSCIENCES, INC.

(Exact Name of Registrant as Specified in its Charter)

Registrant’s telephone number, including area code: (877) 922-9835

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

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☐    No  ☒

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  ☒    No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

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.  ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ☐    No  ☒

As of August 31, 2021, there were 133,694,692 outstanding shares of the registrant’s common stock, par value $0.001 per share.

Explanatory Note

This Amendment No. 1 (the “Amendment”) to the Quarterly Report on Form 10-Q of Cytek Biosciences, Inc. (the “Company”) for the quarter ended June 30, 2021, originally filed with the Securities and Exchange Commission on September 3, 2021 (the “Original Form 10-Q”), is being filed solely to correct an administrative error in the number of outstanding shares of the Company’s common stock, as of August 31, 2021, listed on the cover page. The cover page of this Amendment correctly states that the number of shares of common stock outstanding on August 31, 2021 was 133,694,692.

This Amendment is limited in scope to the correction described above and does not amend, update or change any other items or disclosures contained in the Original Form 10-Q. Accordingly, all other items that remain unaffected are omitted in this filing. Except as described in the preceding paragraph, we do not purport by this Amendment to update any of the information contained in the Original Form 10-Q, which continues to speak as of the original filing date of the Original Form 10-Q.

As required by Rule 12b-15 of the Securities Exchange Act of 1934, as amended, this Amendment contains new certifications by the Company’s principal executive officer and principal financial officer, which are being filed as exhibits to the Amendment. Because the Amendment includes no financial statements, the Company is not including certifications pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

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Item 6. Exhibits.

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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 thereunto duly authorized.

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Exhibit 31.1

CERTIFICATION PURSUANT TO

RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934,

AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Wenbin Jiang, Ph.D., certify that:

Exhibit 31.2

CERTIFICATION PURSUANT TO

RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934,

AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Patrik Jeanmonod, certify that: