Fastly Inc

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and our Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) as of December 31, 2024. Based on such evaluation, our Chief Executive Officer and our Chief Financial Officer have concluded that, as of such date, due to the material weakness described below, our disclosure controls and procedures were not effective as of December 31, 2024.

Management's Annual Report on Internal Control Over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting and for the assessment of the effectiveness of internal control over financial reporting as defined in Rule 13a-15(f) and 15d-15(f) under the Exchange Act.

Under the supervision and with the participation of our Chief Executive Officer and our Chief Financial Officer and oversight of the board of directors, our management conducted an assessment of the effectiveness of our internal control over financial reporting as of December 31, 2024, based on the criteria established in Internal Control Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on the results of its assessment, due to the material weakness described below, management concluded that our disclosure controls and procedures were not effective.

The effectiveness of our internal control over financial reporting as of December 31, 2024 has been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in its report.

Material Weakness

We identified a material weakness in our internal control over financial reporting for the year ended December 31, 2024. A material weakness is a deficiency, or combination of deficiencies, in internal control over financial reporting such that there is a reasonable possibility that a material misstatement of a company’s annual or interim financial statements will not be prevented or detected on a timely basis. We identified deficiencies in the design and operating effectiveness of controls within the revenue process. These deficiencies are related to certain business process controls primarily caused by a lack of sufficiently qualified personnel due to turnover, information technology general controls, including the failure to receive a service auditor’s report for our billing system hosted by a third-party, and insufficient monitoring controls over such third-party service provider. In the aggregate, these deficiencies created a reasonable possibility that a material misstatement to the consolidated financial statements might not be prevented or detected on a timely basis, and represent a material weakness.

The material weakness did not result in a misstatement, but could result in misstatements to our financial statements in the future, if not remediated. Management has concluded that the financial statements included elsewhere in this Annual Report present fairly, in all material respects, our financial position, results of operations and cash flows in conformity with U.S. GAAP.

The effectiveness of our internal control over financial reporting as of December 31, 2024 has been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their report which is included in Part II, Item 8—Financial Statements and Supplementary Data, of this Annual Report on Form 10-K.

Remediation Efforts with Respect to the Material Weakness

The process of implementing an effective system of internal control over financial reporting is a continuous effort that requires us to anticipate and react to changes in our business and the economic and regulatory environments and to expend significant resources to maintain a financial reporting system that is adequate to satisfy our reporting obligations.

We have taken and will continue to take action to remediate this material weakness, including:

•Hiring and training sufficiently qualified personnel with appropriate technical expertise within the revenue process;

•Enhancing the effectiveness of our change management and user access controls over systems within the revenue process by strengthening policies, procedures, review processes, and documentation;

•Enhancing our controls over the ongoing monitoring of third-party service providers to confirm their service auditor reports are timely provided to evidence design, implementation, and operating effectiveness of controls within the service organization’s framework of internal controls; and

•Reassessing the design and effectiveness of controls over the timely input of complete and accurate customer contract information that is used for the processing and recording of billing and revenue transactions in our systems.

As we continue to evaluate and work to improve our internal control over financial reporting, we may decide to take additional measures to address control deficiencies or modify the remediation plans described above. We believe that these actions will remediate the material weakness, however the weakness will not be considered remediated until the applicable controls operate for a sufficient period of time and management has concluded, through testing, that these controls are operating effectively. Management believes the foregoing plans will effectively remediate the deficiencies constituting the material weakness.

Changes in Internal Control over Financial Reporting

Other than as described above, there have been no changes in our internal control over financial reporting in connection with the evaluation required by Rules 13a-15(d) and 15d-15(d) of the Exchange Act that occurred during the period covered by this Annual Report on Form 10-K that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Inherent Limitations on Effectiveness of Controls

An effective internal control system, no matter how well designed, has inherent limitations, including the possibility of human error or overriding of controls, and therefore can provide only reasonable assurance with respect to reliable financial reporting. Because of its inherent limitations, our internal control over financial reporting may not prevent or detect all misstatements, including the possibility of human error, the circumvention or overriding of controls, or fraud. Effective internal controls can provide only reasonable assurance with respect to the preparation and fair presentation of financial statements.

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Stockholders and the Board of Directors of Fastly, Inc.

Opinion on Internal Control over Financial Reporting

We have audited the internal control over financial reporting of Fastly, Inc. and subsidiaries (the “Company”) as of December 31, 2024, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, because of the effect of the material weakness identified below on the achievement of the objectives of the control criteria, the Company has not maintained effective internal control over financial reporting as of December 31, 2024, based on criteria established in Internal Control — Integrated Framework (2013) issued by COSO.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated financial statements as of and for the year ended December 31, 2024, of the Company and our report dated February 25, 2025, expressed an unqualified opinion on those financial statements.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Annual Report on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Material Weakness

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 the company’s annual or interim financial statements will not be prevented or detected on a timely basis. The following material weakness has been identified and included in management's assessment:

The Company identified deficiencies in the design and operating effectiveness of controls within the revenue process. These deficiencies are related to certain business process controls primarily caused by a lack of sufficiently qualified personnel due to turnover, information technology general controls, including the failure to receive a service auditor’s report for our billing system hosted by a third-party, and insufficient monitoring controls over such third-party service provider. In the aggregate, these deficiencies created a reasonable possibility that a material misstatement to the consolidated financial statements might not be prevented or detected on a timely basis, and represent a material weakness.

This material weakness was considered in determining the nature, timing, and extent of audit tests applied in our audit of the consolidated financial statements as of and for the year ended December 31, 2024, of the Company, and this report does not affect our report on such financial statements.

/s/ Deloitte & Touche LLP

San Francisco, California

February 25, 2025