Cambium Networks Corp

Cambium Networks Corporation (the “Company”) has determined that it is unable to file, without unreasonable effort or expense, its Quarterly Report on Form 10-Q for the period ended June 30, 2026 by the prescribed filing due date. Forward-Looking Statements Certain matters discussed constitute forward-looking statements within the meaning of the federal securities laws. All statements contained in this notification that do not relate to matters of historical fact, including statements regarding anticipated results for the period ended June 30, 2026 and statements that address activities, events or developments that the Company “anticipates,” “believes,” “estimates,” “expects,” “intends,” “plans,” “projects,” and similar expressions, are forward -looking statements. The Company’s actual results could differ materially from the results contemplated by these forward-looking statements and are subject to a number of risks, uncertainties, estimates and assumptions that may cause actual results to differ materially from current expectations. These forward-looking statements are based on management's current expectations. These statements are neither promises nor guarantees, but involve known and unknown risks, uncertainties and other important factors that may cause the Company's actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements. Important factors that could cause actual results to differ materially from expectations include, but are not limited to the risks and uncertainties included in the reports on Forms 10-K, 10-Q and 8-K and in other filings the Company makes with the Securities and Exchange Commission from time to time, available at www.sec.gov. The Company undertakes no obligation to update publicly any forward-looking statements, whether as a result of future events, new information or otherwise, except as required by law

Cambium Networks Corporation (the “Company”) has determined that it is unable to file, without unreasonable effort or expense, its Quarterly Report on Form 10-Q for the period ended March 31, 2026 by the prescribed filing due date. The Company has, on April 7, 2026, filed its comprehensive annual report on Form 10-K for the period ended December 31, 2024, including restated financial statements for the year ended December 31, 2023 and for the quarters ended March 31, 2023 and 2024, June 30, 2023 and 2024 and September 30, 2023 and 24. On April 30, 2026, the Company filed its quarterly reports on Form 10-Q for the quarters ended March 31, June 30 and September 30, 2025, and on May 1, 2026, it filed its annual report on Form 10-K for the year ended December 31, 2025. Immediately following completion of these filings, the Company focused its resources on completing the quarterly report on Form 10-Q for the quarter ended March 31, 2026, but is unable to complete and file this report by May 15, 2026. The Company expects to file this quarterly report on Form 10-Q for the quarter ended March 31, 2026, within the five day extension granted by Rule 12b-25 of the Securities Exchange Act of 1934, as amended. Forward-Looking Statements Certain matters discussed constitute forward-looking statements within the meaning of the federal securities laws. All statements contained in this notification that do not relate to matters of historical fact, including statements regarding anticipated results for the period ended March 31, 2026, the Company's expectation of filing its quarterly report on Form 10-Q within the five day extension, and statements that address activities, events or developments that the Company “anticipates,” “believes,” “estimates,” “expects,” “intends,” “plans,” “projects,” and similar expressions, are forward -looking statements

Cambium Networks Corporation (the “Company”) has determined that it is unable to file, without unreasonable effort or expense, its Annual Report on Form 10-K for the fiscal year ended December 31, 2025 (the “2025 Form 10-K”) by the prescribed filing due date. As disclosed on August 11, 2025, on the Current Report on Form 8-K, the Audit Committee of the Board of Directors of the Company, after discussion with management, concluded that the Company’s previously issued financial statements and related disclosures for (i) the audited consolidated financial statements for the fiscal years ended December 31, 2022 and December 31, 2023 included in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2023 and (ii) the unaudited condensed consolidated financial statements included in the Company’s Quarterly Reports on Form 10-Q for the periods ended March 31, 2023, June 30, 2023, September 30, 2023, March 31, 2024, June 30, 2024 and September 30, 2024 (collectively, the “Non-Reliance Periods”) should be restated and should no longer be relied upon due to errors in such financial statements primarily related to variable consideration, including the estimates for sales returns and customer rebates, under Accounting Standards Codification 606, Revenue from Contracts with Customers . In addition, investors should no longer rely upon any press releases, earnings releases, investor presentations and other financial information or other communication that cover any period during the Non-Reliance Periods. As the Company has not yet filed its Annual Report on Form 10-K for the year ended December 31, 2024 or its Quarterly Reports on Form 10-Q for the periods ended March 31, 2025, June 30, 2025 and September 30, 2025 (together with the Annual Report on Form 10-K for the year ended December 31, 2025, the “Delinquent Reports”), and because the restatement process remains ongoing, the Company is unable to file the 2025 Form 10-K at this time

Cambium Networks Corporation (the “Company”) has determined that it is unable to file, without unreasonable effort or expense, its Quarterly Report on Form 10-Q for the period ended September 30, 2025 (the “Third Quarter 2025 Report”) by the prescribed filing due date. As disclosed on August 11, 2025, on the Current Report on Form 8-K, the Audit Committee (the “Audit Committee”) of the Board of Directors of the Company, after discussion with management, concluded that the Company’s previously issued financial statements and related disclosures for (i) the audited consolidated financial statements for the fiscal years ended December 31, 2022 and December 31, 2023 included in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2023 (the “Audited Financial Statements”) and (ii) the unaudited condensed consolidated financial statements (the “Unaudited Financial Statements”) included in the Company’s Quarterly Reports on Form 10-Q for the periods ended March 31, 2023, June 30, 2023, September 30, 2023, March 31, 2024, June 30, 2024 and September 30, 2024 (collectively, the “Non-Reliance Periods”) should be restated and should no longer be relied upon due to errors in such financial statements primarily related to variable consideration, including the estimates for sales returns and customer rebates, under Accounting Standards Codification 606, Revenue from Contracts with Customers . In addition, investors should no longer rely upon any press releases, earnings releases, investor presentations and other financial information or other communication that cover any period during the Non-Reliance Periods

Cambium Networks Corporation (the “Company”) has determined that it is unable to file, without unreasonable effort or expense, its Quarterly Report on Form 10-Q for the period ended June 30, 2025 (the “Second Quarter 2025 Report”) by the prescribed filing due date. As disclosed on August 11, 2025, on the Current Report on Form 8-K, the Audit Committee (the “Audit Committee”) of the Board of Directors of the Company, after discussion with management, concluded that the Company’s previously issued financial statements and related disclosures for (i) the audited consolidated financial statements for the fiscal years ended December 31, 2022 and December 31, 2023 included in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2023 (the “Audited Financial Statements”) and (ii) the unaudited condensed consolidated financial statements (the “Unaudited Financial Statements”) included in the Company’s Quarterly Reports on Form 10-Q for the periods ended March 31, 2023, June 30, 2023, September 30, 2023, March 31, 2024, June 30, 2024 and September 30, 2024 (collectively, the “Non-Reliance Periods”) should be restated and should no longer be relied upon due to errors in such financial statements primarily related to variable consideration, including the estimates for sales returns and customer rebates, under Accounting Standards Codification 606, Revenue from Contracts with Customers . In addition, investors should no longer rely upon any press releases, earnings releases, investor presentations and other financial information or other communication that cover any period during the Non-Reliance Periods

Cambium Networks Corporation (the “Company”) has determined that it is unable to file, without unreasonable effort or expense, its Quarterly Report on Form 10-Q for the three months ended March 31, 2025 (the “Form 10-Q”) by the prescribed filing due date because the Company requires additional time to finalize its assessment of internal control over financial reporting and to complete certain closing processes and procedures relating to its Annual Report on Form 10-K for the year ended December 31, 2024 (the “Form 10-K”), and cannot complete its Form10-Q until the Form 10-K has been completed and filed. The Company does not expect to file its 10-Q within the extension period. Cambium Networks previously determined that it is unable to file, without unreasonable effort or expense, its Annual Report on Form 10-K for the fiscal year ended December 31, 2024 by the prescribed filing due date because the Company requires additional time to finalize the Company's consolidated financial statements and finalize its assessment of internal control over financial reporting and related disclosures. In addition to the material weaknesses disclosed in the Company's Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2024, the Company identified certain material weaknesses in its preliminary assessment of internal control over financial reporting for the fiscal year ended December 31, 2024 related to Allowance for Credit Losses, Customer Incentives, and Information Technology General Controls. The Company has initiated and will continue to implement measures designed to improve its internal control over financial reporting to remediate these material weaknesses with oversight from the Audit Committee of the Board of Directors and assistance from its external advisors, as well as implementing additional processes and controls to address the underlying causes associated with the material weaknesses

Cambium Networks Corporation (the “Company”) has determined that it is unable to file, without unreasonable effort or expense, its Annual Report on Form 10-K for the fiscal year ended December 31, 2024 (the “Form 10-K”) by the prescribed filing due date because the Company requires additional time to finalize the Company’s consolidated financial statements and finalize its assessment of internal control over financial reporting and related disclosures. In addition to the material weaknesses disclosed in the Company’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2024, the Company has identified certain material weaknesses in its preliminary assessment of internal control over financial reporting for the fiscal year ended December 31, 2024 related to Allowance for Credit Losses, Customer Incentives, and Information Technology General Controls. The Company has initiated and will continue to implement measures designed to improve its internal control over financial reporting to remediate these material weaknesses with oversight from the Audit Committee of the Board of Directors and assistance from its external advisors, as well as implementing additional processes and controls to address the underlying causes associated with the material weaknesses. The Company expects to issue its full financial results for the year ended December 31, 2024 when the financial reporting process along with the review of the results and the related audit are completed