ILLUMINA, INC.

OTHER KEY INFORMATION

CONTROLS AND PROCEDURES

We design our internal controls to provide reasonable assurance that (1) our transactions are properly authorized; (2) our assets are safeguarded against unauthorized or improper use; and (3) our transactions are properly recorded and reported in conformity with U.S. generally accepted accounting principles. We also maintain internal controls and procedures to ensure that we comply with applicable laws and our established financial policies.

In the third quarter of 2025, we began implementation efforts related to an upgrade of our global enterprise resource planning (ERP) system. The upgraded ERP system is expected to enhance the flow of financial information, facilitate data analysis, and accelerate information reporting. The upgraded ERP system is expected to become operational in the first half of 2027.

As part of this implementation effort, we may make changes to our processes and procedures which, in turn, could materially affect our internal controls over financial reporting. We will monitor, evaluate, and report the impact of such changes, if any, on our internal controls over financial reporting in the periods in which they occur.

During the second quarter of 2026, we continued to monitor and evaluate the design and operating effectiveness of key controls. There were no changes in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) of the Exchange Act) that materially affected or are reasonably likely to materially affect internal control over financial reporting.

Based on management’s evaluation (under the supervision and with the participation of our chief executive officer (CEO) and chief financial officer (CFO)), as of the end of the period covered by this report, our CEO and CFO concluded that our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the Exchange Act)), are effective to provide reasonable assurance that information required to be disclosed by us in reports that we file or submit under the Exchange Act is recorded, processed, summarized, and reported within the time periods specified in SEC rules and forms, and is accumulated and communicated to management, including our principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure.