Earnings release
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UNITED STATESSECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORTPursuant to Section 13 or 15(d)of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported):November 5, 2025 Cytek Biosciences, Inc. (Exact name of registrant as specified in its charter) Delaware 001-40632 47-2547526 (State or other jurisdictionof incorporation) (CommissionFile Number) (IRS EmployerIdentification No.) 47215 Lakeview Boulevard Fremont, California 94538 (Address of principal executive offices) (Zip Code) Registrant’s telephone number, including area code: (877) 922-9835 (Former name or former address, if changed since last report.) 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: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act: Title of each class TradingSymbol(s) Name of each exchangeon which registered Common Stock, par value $0.001 per share CTKB Nasdaq Global Select Market Indicate by check mark whether the registrant is an emerging growth company as defined in 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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Item 2.02 Results of Operations and Financial Condition. On November 5, 2025, Cytek Biosciences, Inc. issued a press release announcing its financial results for the quarter ended September 30, 2025. The press release is being furnished as Exhibit 99.1. The information furnished in this Current Report under Item 2.02 and the exhibit attached hereto shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing. Item 9.01 Financial Statements and Exhibits. (d) Exhibits. ExhibitNumber Description of Exhibit 99.1 Press release dated November 5, 2025 104 Cover Page Interactive Data File (embedded within the Inline XBRL document)
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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 hereunto duly authorized. Cytek Biosciences, Inc. Date: November 5, 2025 By: /s/ Wenbin Jiang Wenbin Jiang, Ph.D. President and Chief Executive Officer
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Exhibit 99.1 Cytek Biosciences Reports Third Quarter 2025 Financial Results FREMONT, Calif., November 5, 2025 (GLOBE NEWSWIRE) – Cytek® Biosciences, Inc. (“Cytek Biosciences” or “Cytek”) (Nasdaq: CTKB), a leading cell analysis solutions company, today reported financial results for the third quarter ended September 30, 2025. Recent Highlights • Total revenue for the third quarter of 2025 was $52.3 million, representing a 2% increase compared to the third quarter of 2024 • Expanded to a total installed base of 3,456 Cytek instruments, adding 161 units in the third quarter of 2025 • Double-digit total revenue growth year-over-year in all regions, except EMEA • Worldwide revenue from biotechnology, pharmaceutical and clinical research organization (“CRO”) customers grew 14% year-over-year • Total recurring revenue, comprised of service and reagent revenues, grew 19% compared to the third quarter of 2024 • Expanded European headquarters in Amsterdam, increasing footprint by more than 40% with a customer service and training center “Our third quarter results are encouraging and demonstrate the strength of our established brand and technology and our market leadership position,” said Wenbin Jiang, CEO of Cytek Biosciences. “As we look ahead, our team remains sharply focused on expanding our global installed base, growing our recurring revenue streams and on profitability and cash generation. While we remain mindful of market conditions, we believe Cytek is well- positioned to deliver long-term value for all of our stakeholders through the strong and disciplined execution of our strategic priorities.” Third Quarter 2025 Financial Results Total revenue for the third quarter of 2025 was $52.3 million, a 2% increase compared to the third quarter of 2024. The increase in revenue was due to higher revenue in the US, APAC, and rest-of-world, partially offset by continued softness in EMEA. GAAP gross profit was $27.6 million for the third quarter of 2025, a 5% decrease compared to the third quarter of 2024. GAAP gross profit margin was 53% in the third quarter of 2025, compared to 56% in the third quarter of 2024. Adjusted gross profit margin, after adjusting for stock-based compensation expense and amortization of acquisition-related intangibles, was 55% in the third quarter of 2025, compared to 60% in the third quarter of 2024. Operating expenses were $36.7 million for the third quarter of 2025, a 10% increase compared to the third quarter of 2024 due to increased general and administrative expenses offset by a reduction in sales and marketing and research and development expenses.
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Research and development expenses were $9.0 million for the third quarter of 2025, a 9% decrease compared to the third quarter of 2024. Sales and marketing expenses were $11.7 million for the third quarter of 2025, a 6% decrease compared to the third quarter of 2024. General and administrative expenses were $16.1 million for the third quarter of 2025, increasing 47% compared to the third quarter of 2024, due primarily to litigation-related expenses and a non-recurring charge of $0.7 million, related to the write-off of deferred offering costs for a 2022 “at the market” (“ATM”) equity financing facility that expired in the third quarter of 2025. Loss from operations in the third quarter of 2025 was $9.2 million, compared to loss from operations of $4.2 million in the third quarter of 2024. Net loss in the third quarter of 2025 was $5.5 million, compared to a net income of $0.9 million in the third quarter of 2024. Adjusted EBITDA in the third quarter of 2025 was $2.5 million, compared to $7.6 million in the third quarter of 2024, after adjusting for stock-based compensation expense, foreign currency exchange impacts, and the non-recurring, non-cash expense of $0.7 million described above. Excluding investment income, Adjusted EBITDA for the third quarter was $0.5 million, compared to $5.7 million in the third quarter of 2024. Cash and marketable securities totaled $261.7 million as of September 30, 2025, compared to $262.0 million as of June 30, 2025, a decrease of $0.3 million. 2025 Outlook Cytek Biosciences reaffirms its 2025 revenue guidance of full year 2025 revenue to be in the range of $196 million to $205 million, representing growth of -2% to +2% over full year 2024, assuming no change from current currency exchange rates. Webcast Information Cytek will host a conference call to discuss its third quarter 2025 financial results on Wednesday, November 5, 2025, at 1:30 p.m. Pacific Time / 4:30 p.m. Eastern Time. A webcast of the conference call can be accessed at investors.cytekbio.com. About Cytek Biosciences, Inc. Cytek Biosciences (Nasdaq: CTKB) is a leading cell analysis solutions company advancing the next generation of cell analysis tools by delivering high- resolution, high-content and high-sensitivity cell analysis utilizing its patented Full Spectrum Profiling™ (FSP®) technology. Cytek’s novel approach harnesses the power of information within the entire spectrum of a fluorescent signal to achieve a higher level of multiplexing with precision and sensitivity. Cytek’s platform includes: its core FSP instruments, the Cytek Aurora™, Northern Lights™, Cytek Aurora™ CS and Cytek Aurora™ Evo systems; the Cytek Orion™ reagent cocktail preparation system; the Enhanced Small Particle™ (ESP™) detection technology; the flow cytometers and imaging products under the Amnis® and Guava® brands; and reagents, software and services to provide a comprehensive and integrated suite of solutions for its customers. Cytek is headquartered in Fremont, California with offices and distribution channels across the globe. More information about the company and its products is available at www.cytekbio.com.
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Cytek’s products are for research use only and not for use in diagnostic procedures (other than Cytek’s Northern Lights-CLC system and certain reagents, which are available for clinical use only in China and the European Union). Cytek, Full Spectrum Profiling, FSP, Cytek Aurora, Northern Lights, Enhanced Small Particle, ESP, Cytek Orion, Amnis and Guava are trademarks of Cytek Biosciences, Inc. In addition to filings with the Securities and Exchange Commission (SEC), press releases, public conference calls and webcasts, Cytek uses its website (www.cytekbio.com), LinkedIn page and X account as channels of distribution of information about its company, products, planned financial and other announcements, attendance at upcoming investor and industry conferences and other matters. Such information may be deemed material information and Cytek may use these channels to comply with its disclosure obligations under Regulation FD. Therefore, investors should monitor Cytek’s website, LinkedIn page, and X account in addition to following its SEC filings, news releases, public conference calls and webcasts. Statement Regarding Use of Non-GAAP Financial Information Cytek has presented certain financial information in accordance with generally accepted accounting principles in the United States (“U.S. GAAP”) and also on a non-GAAP basis for the three-month period ended September 30, 2025 and September 30, 2024. Management believes that non-GAAP financial measures, including “Adjusted gross profit,” “Adjusted gross profit margin,” “Adjusted EBITDA,” and “Adjusted EBITDA excluding investment income,” referenced in this release, taken in conjunction with GAAP financial measures, provide useful information for both management and investors by excluding certain non-cash and other expenses that are not indicative of the company’s core operating results. Management uses non-GAAP measures to compare the company’s performance relative to forecasts and strategic plans and to benchmark the company’s performance externally against competitors. Non-GAAP information is not prepared under a comprehensive set of accounting rules and should only be used to supplement an understanding of the company’s operating results as reported under U.S. GAAP. Cytek encourages investors to carefully consider its results under GAAP, as well as its supplemental non-GAAP information and the reconciliation between these presentations, to more fully understand its business. Reconciliations between GAAP and non-GAAP operating results are presented in the accompanying tables of this release.
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Forward-Looking Statements This press release and the related conference call, webcast and presentation contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 as contained in Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, which are subject to the “safe harbor” created by those sections. All statements other than statements of historical facts are forward-looking statements. Forward-looking statements generally can be identified by the use of forward-looking terminology such as “may,” “might,” “will,” “should,” “would,” “expect,” “plan,” “anticipate,” “could,” “intend,” “target,” “project,” “believe,” “contemplate,” “estimate,” “intend,” “potential,” “predict,” or “continue” or the negatives of these terms or variation of them or similar terminology, but the absence of these words does not mean that a statement is not forward-looking. These forward-looking statements include, but are not limited to, statements regarding Cytek’s ability to expand its global installed base, grow its recurring revenue streams and deliver long-term value for all of its stakeholders; Cytek’s future profitability and cash generation; Cytek’s future financial performance, including its outlook for fiscal year 2025 and expectations for 2025 total revenue; Cytek’s business strategies, product, and operational plans and market opportunities, as well as any expectations or assumptions thereto; and any statements regarding current or future macroeconomic trends or events and the impact of those trends and events on Cytek and its financial performance. These statements are based on management’s current expectations, forecasts, beliefs, assumptions and information currently available to management. These statements also deal with future events and involve known and unknown risks, uncertainties and other factors that may cause actual results, performance or achievements to be materially different from the information expressed or implied by these forward-looking statements. In addition, new risks and uncertainties emerge from time to time, and it is not possible for us to predict all risks and uncertainties that could have an impact on the forward- looking statements. Factors that could cause actual results to differ materially include global geopolitical, economic and market conditions; Cytek’s ability to manage the impacts of recent and future export controls and licensing requirements, tariffs and NIH funding policies on its business; Cytek’s ability to evaluate its prospects for future viability and predict future performance; Cytek’s ability to accurately forecast customer demand and adoption of its products; Cytek’s ability to recognize the anticipated benefits of collaborations; Cytek’s dependence on certain sole and single source suppliers; competition; market acceptance of Cytek’s current and potential products; Cytek’s ability to manage the growth and complexity of its organization, maintain relationships with customers and suppliers and hire and retain key employees; Cytek’s ability to manufacture its products in high-quality commercial quantities successfully and consistently to meet demand; Cytek’s ability to increase penetration in its existing markets and expand into adjacent markets; Cytek’s ability to secure additional distributors or maintain good relationships with its existing distributors; Cytek’s ability to successfully develop and introduce new products; Cytek’s ability to maintain, protect and enhance its intellectual property; Cytek’s ability to continue to stay in compliance with its material contractual obligations, applicable laws and regulations; and foreign currency exchange impacts. You should refer to the sections titled “Risk Factors” set forth in Cytek’s Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2025 filed with the Securities and Exchange Commission (the “SEC”) on August 6, 2025 and in Cytek’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2025 to be filed with the SEC on or about the date hereof, and other filings Cytek makes with the SEC from time to time for a discussion of important factors that may cause actual results to differ materially from those expressed or implied by Cytek’s forward-looking statements. Although Cytek believes that the expectations reflected in the forward-looking statements are reasonable, it cannot provide any assurance that these expectations will prove to be correct nor can it guarantee that the future results, levels of activity, performance and events and
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circumstances reflected in the forward-looking statements will be achieved or occur. The forward-looking statements in this press release and the related conference call, webcast and presentation are based on information available to Cytek as of the date hereof, and Cytek disclaims any obligation to update any forward-looking statements provided to reflect any change in its expectations or any change in events, conditions, or circumstances on which any such statement is based, except as required by law. These forward-looking statements should not be relied upon as representing Cytek’s as of any date subsequent to the date of this press release. Information contained on, or that is reference or can be accessed through, our website does not constitute part of this document, and inclusions of any website addresses herein are inactive textual references only. Media Contact: Stephanie Olsen Lages & Associates (949) 453-8080 stephanie@lages.com Investor Contact: Paul Goodson Head of Investor Relations Cytek Biosciences pgoodson@cytekbio.com
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Cytek Biosciences, Inc. Consolidated Statements of Operations and Comprehensive Loss (unaudited) Three months ended September 30, Nine months ended September 30, (In thousands, except share and per share data) 2025 2024 2025 2024 Revenue, net: Product $ 38,114 $ 39,544 $ 97,639 $ 108,242 Service 14,179 11,956 41,713 34,735 Total revenue, net 52,293 51,500 139,352 142,977 Cost of sales: Product 17,728 17,490 48,178 50,044 Service 7,014 5,005 19,599 15,479 Total cost of sales 24,742 22,495 67,777 65,523 Gross profit 27,551 29,005 71,575 77,454 Operating expenses: Research and development 8,956 9,882 27,506 29,679 Sales and marketing 11,666 12,429 36,309 37,240 General and administrative 16,121 10,942 42,550 34,044 Total operating expenses 36,743 33,253 106,365 100,963 Loss from operations (9,192) (4,248) (34,790) (23,509) Other income (expense): Interest expense (494) (119) (1,199) (694) Interest income 573 1,433 1,636 4,208 Other income, net 1,344 3,091 8,543 3,972 Total other income, net 1,423 4,405 8,980 7,486 (Loss) income before income taxes (7,769) 157 (25,810) (16,023) Benefit from income taxes (2,291) (784) $ (3,347) (360) Net (loss) income $ (5,478) $ 941 $ (22,463) $ (15,663) Net (loss) income, basic and diluted $ (5,478) $ 941 $ (22,463) $ (15,663) Net (loss) income per share, basic $ (0.04) $ 0.01 $ (0.18) $ (0.12) Net (loss) income per share, diluted $ (0.04) $ 0.01 $ (0.18) $ (0.12) Weighted-average shares used in calculating net (loss) income per share, basic 127,547,859 131,003,744 $127,604,317 $131,121,301 Weighted-average shares used in calculating net (loss) income per share, diluted 127,547,859 132,785,552 $127,604,317 $131,121,301 Comprehensive (loss) income: Net (loss) income $ (5,478) $ 941 $ (22,463) $ (15,663) Foreign currency translation adjustment, net of tax 741 101 $ 784 1,232 Unrealized gain on marketable securities 118 195 $ 20 144 Net comprehensive (loss) income $ (4,619) $ 1,237 $ (21,659) $ (14,287)
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Cytek Biosciences, Inc. Consolidated Balance Sheets (In thousands, except share and per share data) September 30,2025 December 31,2024 (unaudited) (audited) Assets Current assets: Cash and cash equivalents $ 93,281 $ 98,716 Restricted cash — 29 Marketable securities 168,453 179,145 Trade accounts receivable, net 56,632 60,588 Inventories 51,649 43,893 Prepaid expenses and other current assets 18,474 14,075 Total current assets $ 388,489 $ 396,446 Deferred income tax assets, noncurrent 38,393 33,374 Property and equipment, net 18,046 17,962 Operating lease right-of-use assets 11,158 10,168 Goodwill 16,698 16,663 Intangible assets, net 17,676 20,128 Other noncurrent assets 4,459 4,759 Total assets $ 494,919 $ 499,500 Liabilities and stockholders’ equity Current liabilities: Trade accounts payable 7,632 $ 5,529 Legal settlement liability, current 2,177 1,705 Accrued expenses 20,233 21,443 Other current liabilities 16,426 13,494 Deferred revenue, current 28,739 25,492 Total current liabilities 75,207 67,663 Legal settlement liability, noncurrent 8,158 9,036 Deferred revenue, noncurrent 16,315 16,098 Operating lease liability, noncurrent 13,494 7,552 Long term debt 655 1,050 Other noncurrent liabilities 2,519 2,364 Total liabilities $ 116,348 $ 103,763 Stockholders’ equity: Common stock, $0.001 par value; 1,000,000,000 authorized shares as of September 30, 2025 and December 31, 2024, respectively; 127,864,830 and 129,205,901 issued and outstanding shares as of September 30, 2025 and December 31, 2024, respectively. 128 129 Additional paid-in capital 435,284 430,791 Accumulated deficit (57,662) (35,199) Accumulated other comprehensive gain 821 16 Total stockholders’ equity $ 378,571 $ 395,737 Total liabilities and stockholders’ equity $ 494,919 $ 499,500
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Cytek Biosciences, Inc. Reconciliation of GAAP to Non-GAAP Measures (Unaudited) (In thousands) Three months ended September 30,2025 September 30,2024 (Unaudited) (Unaudited) GAAP Gross profit $ 27,551 $ 29,005 Stock based compensation $ 906 $ 1,154 Amortization of acquisition-related intangible assets $ 481 $ 492 Non-GAAP Adjusted gross profit $ 28,938 $ 30,651 GAAP Gross margin 53% 56% Non-GAAP Adjusted gross margin 55% 60% GAAP Net income $ (5,478) $ 941 Depreciation and amortization $ 3,063 $ 2,807 Provision for (benefit from) income taxes $ (2,291) $ (784) Interest income $ (573) $ (1,433) Interest expense $ 494 $ 119 Foreign currency exchange loss (gain) $ 886 $ (1,076) Stock based compensation $ 5,638 $ 7,053 Non-recurring deferred ATM facility offering cost write off $ 711 $ — Non-GAAP Adjusted EBITDA $ 2,450 $ 7,627 Investment income $ (1,960) $ (1,914) Non-GAAP Adjusted EBITDA excluding investment income $ 490 $ 5,713