MARAVAI LIFESCIENCES HOLDINGS, INC.

Evaluation of Disclosure Controls and Procedures

Under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer, we evaluated the effectiveness of our disclosure controls and procedures pursuant to Rule 13a-15(e) and 15(d)-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), as of the end of the period covered by this Quarterly Report on Form 10-Q. Our disclosure controls and procedures are designed to ensure that information required to be disclosed in the reports we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to our management, including the Chief Executive Officer and the Chief Financial Officer, to allow timely decisions regarding required disclosures. Any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objective, and management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Based on that evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that our disclosure controls and procedures were not effective at a reasonable assurance level as of June 30, 2025 due to the material weaknesses in internal control over financial reporting described below.

Material Weaknesses in Internal Control over Financial Reporting

A material weakness is a deficiency, or a combination of deficiencies, in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of our annual or interim financial statements will not be prevented or detected on a timely basis.

As previously reported in our Annual Report on Form 10-K for the year ended December 31, 2024, management identified the following material weaknesses in our internal controls over financial reporting:

•Revenue and accounts receivable: Management did not design and operate effective controls over the Company’s revenue process. Specifically, we did not design and maintain effective controls over the timing of when the Company has transferred control of goods to its customers at period end, segregation of duties related to customer purchase order information entered into the Company’s IT systems, accounting for customer product revenue, and the authorization and documentation of pricing approvals. The material weakness is an aggregation of these matters.

•Goodwill impairment: Management did not operate effective controls over the key inputs and assumptions that were utilized to determine the fair value of reporting units in the Company’s quantitative goodwill impairment assessment as of December 31, 2024.

These material weaknesses, individually or in the aggregate, could result in misstatements of accounts or disclosures in the consolidated financial statements that would not be prevented or detected on a timely basis.

Remediation Plan for Material Weaknesses

With respect to the material weaknesses above, management, under the oversight of the Audit Committee, is in the process of designing appropriate controls as well as implementing measures to ensure appropriate operation of existing controls to address these material weaknesses. While we have taken steps to implement our remediation plan, the material weaknesses will not be considered remediated until the enhanced controls operate for a sufficient period of time and management has concluded, through testing, that the related controls are effective. The Company will monitor the effectiveness of its remediation plan and refine its remediation plan as appropriate. Remediation to address the material weaknesses noted above, includes:

•Revenue and accounts receivable -

–Remediating the design and operation of existing controls related to the revenue process.

–Designing and implementing new controls to sufficiently document evidence of pricing authorization and approvals.

–Reviewing order entry data input into IT systems to ensure accuracy.

–Reviewing shipping terms as a factor in determining the timing of when control of goods is transferred to customers at period end.

–Monitoring work order activity related to custom product manufacturing.

•Goodwill impairment - enhancing the operation of certain management review controls over key inputs and assumptions, including projected financial information, by refining the precision by which the controls operate and retaining sufficient evidence of the review over key inputs and assumptions included in the quantitative goodwill impairment analysis.

Further, we plan to continue to provide relevant training to control owners to ensure they understand the importance of the documentation that supports the effective operation of our control activities, including evidence over the completeness and accuracy of information used in the controls.

When fully implemented and operational, we believe the measures described above will remediate the control deficiencies that have led to these material weaknesses.

We will determine that our material weaknesses have been fully remediated only after we have (i) implemented and tested the necessary changes and (ii) observed the operation of remediated controls for a sufficient period of time for us to determine that such controls are operating effectively. We may also conclude that additional measures or costs are required to remediate the material weaknesses in our internal control over financial reporting. We will monitor and report the effectiveness of our remediation plan and refine our remediation plan as appropriate.

Changes in Internal Control over Financial Reporting

We are executing our remediation plans to remediate the material weaknesses relating to our internal control over financial reporting, as described above. Other than the changes described above, there have been no changes in our internal control over financial reporting, as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act, during the three months ended June 30, 2025 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.