ILLUMINA, INC.

To enhance comparability, the following table sets forth audited consolidated statement of operations data for 2025, 2024, and 2023, stated as a percentage of total revenue.(1)

(1)Percentages may not recalculate due to rounding.

Revenue

Core Illumina consumables revenue increased in 2025 primarily due to demand for high-throughput consumables as customers continue to transition to NovaSeq X. Core Illumina instruments revenue decreased in 2025 primarily due to fewer shipments of our high- and mid-throughput instruments, as capital and cash flow constraints continue to impact our customer’s purchasing behavior, partially offset by an increase in MiSeq i100 Series shipments. Core Illumina service and other revenue decreased in 2025 primarily due to decreased revenue from our strategic partnerships. Total revenue in 2025 was impacted, across all products and services, by a decrease in revenue in our Greater China region of$65 million, primarily due to our inclusion on the List of Unreliable Entities in the beginning of the year.

The decrease in GRAIL revenue in 2025 was due to the Spin-Off in Q2 2024.

Gross Margin

*Not meaningful.

The decrease in Core Illumina gross margin in 2025 was primarily due to higher costs related to tariffs and a $23 million intangible asset impairment, partially offset by lower strategic partnership revenue, that is lower margin, and a more favorable product mix towards consumables.

The decrease in GRAIL gross loss in 2025 was due to the Spin-Off in Q2 2024.

Operating Expense

Core Illumina R&D expense decreased by $21 million, or 2%, in 2025 primarily due to decreases in employee-related compensation costs, including share-based compensation expense related to our optimization efforts, and a decrease in outside professional services, partially offset by an increase in restructuring charges of$14 million.

Core Illumina SG&A expense increased by $186 million, or 21%, in 2025. In 2024, we recognized a net gain on our contingent consideration liabilities, primarily related to the GRAIL CVRs, of$315 million. Excluding this impact, SG&A expense decreased in 2025 primarily due to a decrease in acquisition-related costs, which included $53 million of expenses incurred related to the Spin-Off of GRAIL, a decrease in restructuring charges of$32 million, primarily due to lease and other asset impairments recognized in 2024, decreases in employee-related compensation costs, including share-based compensation expense related to optimization efforts, and a decrease in outside professional services. These decreases were partially offset by a $19 million non-cash donation to the Illumina Foundation.

The decrease in GRAIL R&D and SG&A expense in 2025 was due to the Spin-Off in Q2 2024.

GRAIL goodwill and intangible impairment in 2024 consisted of goodwill impairment of $1,466 million and an IPR&D intangible asset impairment of $420 million. Core Illumina goodwill and intangible impairment in 2024 consisted of an IPR&D intangible asset impairment. See note 4. Intangible Assets, Goodwill and Acquisitions for additional details.

Core Illumina legal contingency and settlement in 2024 primarily consisted of a gain of $489 million resulting from the reversal of the EC fine accrual, and related accrued interest, following the European Commission’s decision to withdraw its previously imposed fine. See note 8. GRAIL Spin-Off for additional details.

Other Income (Expense)

(1)Total other income (expense), net in 2024 primarily relates to Core Illumina segment.

Interest income consisted primarily of interest earned on our money market funds. Interest expense consisted primarily of interest on our outstanding term debt. The increase in other income (expense), net in 2025 was primarily due to net gains (realized and unrealized) recognized on our strategic investments of $328 million in 2025 compared to net losses of $312 million recognized in 2024, which primarily related to our retained investment in GRAIL for both periods. This increase was partially offset by a $15 million gain on our Helix contingent value right in 2024.

Provision for Income Taxes

In 2025, the variance from the U.S. federal statutory tax rate of 21% was primarily due to the release of a valuation allowance of $74 million against certain deferred tax assets in Singapore. This was partially offset by the implications of the U.S. tax legislation that was signed on July 4, 2025, which included changes to no longer require capitalization of U.S. based research and development expenses. While the changes from the recent U.S. tax legislation were favorable, based on available evidence, the increased U.S. tax deductions resulted in a determination that it is more likely than not the future realization of deferred tax assets associated with certain U.S. foreign tax credits may not be achieved. Therefore, a valuation allowance of $62 million was recorded against the deferred tax assets associated with certain U.S. foreign tax credits. The income tax rate in 2025 was favorably impacted by the mix of earnings in jurisdictions with lower statutory tax rates than the U.S. federal statutory tax rate, such as Singapore.

In 2024, the variance from the U.S. federal statutory tax rate of 21% was primarily due to the $308 million income tax expense impact from the impairment of goodwill, which is nondeductible for tax purposes, $90 million income tax expense impact of GRAIL pre-acquisition net operating losses on GILTI, the utilization of U.S. foreign tax credits, and the Pillar Two global minimum top-up tax, and the $52 million income tax expense impact of capitalizing research and development expenses for tax purposes. The income tax rate in 2024 was favorably impacted by the $99 million income tax expense impact of the reversal of the European Commission fine related to the GRAIL acquisition, which is excluded from taxable income, and by the mix of earnings in jurisdictions with lower statutory tax rates than the U.S. federal statutory tax rate, such as in Singapore.

Our future effective tax rate may vary from the U.S. federal statutory tax rate due to the mix of earnings in tax jurisdictions with different statutory tax rates and the other factors discussed in the risk factor “We are subject to risks related to taxation in multiple jurisdictions” in Risk Factors within the Business & Market Information section of this report, including future tax legislation that changes existing tax policies, laws, regulations, or rates.