Joydeep Goswami
Chief Financial Officer, Chief Strategy and Corporate Development Officer at Illumina
Thank you, Francis. I'll start by reviewing our consolidated financial results followed by segment results for core Illumina and GRAIL and then conclude with additional remarks on our current outlook for 2023. I will be discussing non-GAAP results, which include stock-based compensation. I encourage you to review the GAAP reconciliation of these non-GAAP measures, which can be found in today's release and in supplementary data available on our website.
In the first quarter, consolidated revenue was $1.09 billion, up 1% from the fourth quarter of 2022 exceeding the high end of our guidance range on stronger than expected shipments of NovaSeq X. Consolidated revenue was down 11% year-over-year or down 9% on a constant currency basis net of the effects of hedging. This was primarily driven by an expected year-over-year slowdown in COVID surveillance, COVID related disruptions in China, the transition of some of our high throughput customers to NovaSeq X and customers managing constrained capital markets globally.
Non-GAAP net income was $13 million or $0.08 per diluted share, which include dilution from GRAIL's non-GAAP operating loss of $164 million for the quarter. Our non-GAAP tax rate was 27.3% for the quarter, which increased from 17.8% in Q1 2022 with both quarters reflecting the impact of R&D capitalization requirements. Although the non-GAAP tax expense impact of R&D capitalization requirements in dollar terms was the same in both periods, the impact to our effective tax rate in quarter one 2023 was more significant due to our lower earnings. Our non-GAAP weighted average diluted share count for the quarter was approximately 158 million.
Moving to segment results. Core Illumina revenue of $1.08 billion was down 12% year-over-year, which included an anticipated headwind from COVID surveillance of approximately 400 basis points. COVID surveillance contributed approximately $11 million in total revenue in Q1 2023 compared to $60 million CAD in Q1 2022 reflecting a $49 million headwind. On a constant currency basis, core Illumina revenue was down 10% net of the effects of hedging. Core Illumina sequencing consumables revenue of $692 million was up 1% sequentially, but down 12% year-over-year, which included an approximately 500 basis point headwind from COVID surveillance.
In addition to the slowdown in COVID surveillance, the year-over-year decrease was primarily attributable to lower NovaSeq 6000 consumables pull through due to headwinds I mentioned earlier: COVID related disruptions in China, the transition of some of our high throughput customers, NovaSeq X and customers managing constrained capital markets globally. Total sequencing activity on our connected high and mid throughput instruments grew 6% from Q4 2022 and 3% year-over-year. Research and applied grew 7% from Q4 2022 and declined 4% year-over-year. Clinical sequencing activity growth remained robust, up 7% from Q4 2022 and 15% year-over-year. As a reminder, we believe this data as a useful reference that shows the general activity trends across our installed base and is directionally correlated with revenue over time.
Sequencing instruments revenue for core Illumina of $154 million declined 27% year-over-year, including a 300 basis point headwind from COVID surveillance. As expected, the year-over-year decrease was primarily driven by lower NovaSeq 6000 shipments compared to a record Q1 2022 and a decrease in mid throughput shipments due primarily to fewer NextSeq 550 placements in China. Stronger than expected shipments of NovaSeq X helped partially offset this impact, although we remain supply constrained in the first year of launch. We continued to see strong demand for NextSeq 1k/2k from new to Illumina customers. Core Illumina sequencing service and other revenue of $119 million was up 7% year-over-year, driven primarily by higher instrument service contract revenue on a growing installed base.
Before moving to the regional results for core Illumina, I'd like to highlight that we have implemented a new global commercial structure to improve operating efficiencies and better align with local markets We've integrated APJ with emerging markets across Middle East, Africa and Turkey and CIS. Going forward, we'll report regional results for the following regions: Americas, Europe, Greater China and EMEA or Asia Pacific, Middle East and Africa. Americas revenue of $605 million grew 5% sequentially from Q4 2022 and exceeded our expectations due to stronger than anticipated NovaSeq X shipments. Revenue for the region was down 6% year-over-year due to the expected decline in research, driven by the slowdown in COVID surveillance and delayed recruitment for some large research projects. We continued to see strong demand for NextSeq 1k/2k in the Americas with instrument shipments up over 20% year-over-year.
Europe revenue of $261 million represented a 9% decrease year-over-year or a 4% decrease on a constant currency basis net of the effects of hedges. Growth in clinical led by oncology testing was more than offset by the expected decline in COVID surveillance revenue as well as lower high throughput instrument shipments due to supply constraints on NovaSeq X in the first quarter. Greater China revenue of $91 million represented a 28% decrease year-over-year or a 23% decrease on a constant currency basis net of the effect of hedges. The year-over-year decline was primarily driven by persistent COVID disruptions and liquidity and funding constraints at our customers. This resulted in lower sequencing consumables revenue and a decrease in mid throughput shipments compared to last year. We will continue to closely monitor and mitigate market headwinds in China through the rest of the year.
Finally, EMEA revenue of $119 million declined 27% year-over-year or 23% on a constant currency basis net of the effects of hedges. As expected, the year-over-year decline was primarily caused by the completion of a large research project in Japan, lower COVID surveillance revenue and a decrease in NovaSeq 6000 instrument shipments only partially offset by NovaSeq X shipments as demand in the region outpaced supply. EMEA revenue was also impacted by sanctions affecting our ability to conduct business in Russia. We expect the impact of sanctions to persist through 2023 and have reflected approximately $60 million in lower sequencing consumables revenue expectations for the region in our outlook for 2023.
Moving to the rest of core Illumina P&L. Core Illumina non-GAAP gross margin of 65.2% decreased 500 basis points year-over-year, primarily driven by a less fixed cost leverage on our lower manufacturing volumes and lower instrument margins due to NovaSeq X launch, which is typical with a new platform introduction. We expect gross margins to improve sequentially through the year as we scale NovaSeq X manufacturing and continue to drive operating efficiencies. Core Illumina non-GAAP operating expenses of $514 million were up $9 million year-over-year, primarily due to the full year impact of our headcount growth in 2022. Non-GAAP operating expenses were lower than expected as a result of cost containment initiatives.
Transitioning to the financial results for GRAIL. GRAIL revenue of $20 million for the quarter grew 100% year-over-year, driven primarily by accelerating adoption of Galleri. As expected, GRAIL revenue decreased sequentially due to a milestone payment in Q4 2022 related to MRD pharma partnerships. GRAIL non-GAAP operating expenses totaled $173 million and increased $34 million year-over-year, driven primarily by continued investments in clinical trials and to scale GRAIL's commercial organization.
Moving to consolidated cash flow and balance sheet items. Cash flow provided by operations was $10 million. First quarter 2023 capital expenditures were $52 million and free cash flow was negative $42 million. We did not repurchase any common stock in the quarter. We ended the quarter with approximately $1.5 billion in cash, cash equivalents and short-term investments. During the first quarter, we used $500 million to repay the outstanding principal of our 2023 term notes that matured in March.
Moving now to 2023 guidance. We still expect full year 2023 consolidated revenue to grow 7% to 10%, including core Illumina revenue growth of 6% to 9%. As a reminder, these ranges included an anticipated headwind from COVID surveillance of approximately 200 basis points as well as a year-over-year headwind from foreign exchange rates. GRAIL revenue is still expected to be in the range of $90 million to $110 million for 2023. Our revenue outlook for 2023 now reflects the following offsetting factors: one, lower revenue in EMEA due to the impact of sanctions affecting our ability to conduct business in Russia; two, an increase in our NovaSeq X shipment expectations to more than 330 instruments; and three, higher contributions from our strategic partnerships related to drug discovery.
As we have previously stated, we expect quarterly core Illumina revenue to ramp sequentially through 2023 with linearity trends similar to 2017 when we launched the NovaSeq 6000 where we delivered approximately 54% of our total revenue in the second half of the year, including approximately 26% in Q3 and the remainder in Q4. Our revenue ramp for 2023 reflects the following assumptions: one, a quarterly ramp in NovaSeq X shipments as the manufacturing capacity improves each quarter; two, sequencing consumables revenue increases as NovaSeq X customers kick off projects in the second half of 2023; and three, certain macroeconomic headwinds lessened in the second half of 2023, including a recovery from COVID disruptions in China.
For fiscal 2023, at the midpoint of our revenue guidance, we now expect core Illumina sequencing instrument revenue growth of approximately 13% year-over-year reflecting our higher NovaSeq X shipment expectations. We now expect core Illumina sequencing consumables revenue growth of approximately 5.5% year-over-year, driven predominantly by our lower revenue outlook for EMEA due to the impact of sanctions affecting our ability to conduct business in Russia. We continue to expect core Illumina sequencing revenue to grow approximately 8% year-over-year. This now includes a higher contribution from sequencing service and other revenue, primarily due to higher contributions from strategic pharma partnerships.
We continue to expect non-GAAP earnings per diluted share in the range of $1.25 to $1.50 for 2023 including a consolidated non-GAAP operating margin of approximately 8% and core Illumina non-GAAP operating margin of approximately 22%. We are reaffirming all other financial guidance for fiscal 2023 that we provided on February 7, 2023. Moving to the second quarter of 2023, we expect consolidated revenue in the range of $1.15 billion to $1.17 billion for Q2 2023 reflecting a sequential increase of approximately 670 basis points from Q1 2023 at the midpoint or approximately $70 million, primarily driven by a sequential increase in NovaSeq X instrument shipments as manufacturing capacity continues to ramp, continued sequential growth in sequencing consumables and service revenue as new instruments continue to come online, a sequential increase in GRAIL revenue driven by accelerating gallery adoption, partially offset by a sequential decrease in microarrays revenue to historical seasonality.
For the second quarter, at the midpoint of our revenue guidance range, we expect non-GAAP diluted EPS of approximately $0.01 reflecting consolidated non-GAAP operating margin of approximately 1% and core Illumina non-GAAP operating margin of approximately 17%. These margins reflect a sequential increase in core Illumina operating expenses driven by an increase in compensation related expense due to our typical annual equity grant and merit adjustment in March. We continue to expect operating margins to improve in the second half of 2023 as revenue ramps and we scale our production of NovaSeq X and leverage the fixed cost of the manufacturing base.
Looking forward, we are committing to achieve core Illumina non-GAAP operating margins of 25% in 2024 and 27% in 2025. Illumina will reduce its annualized run rate expenses by more than $100 million beginning later in 2023. These cost savings will accelerate progress towards higher margins as well as free up capital to increase investment in high growth areas. Illumina will achieve these savings through a combination of several actions. We will leverage the recent modularization of R&D innovation created as part of the NovaSeq X development, including XLEAP-SBS and new flow cell technology to lower the cost and accelerate time to market for future platforms. We will achieve additional savings through leveraging our global footprint enabling activities at more cost effective hubs. We are also streamlining our organization and processes including rationalization of the company's global real estate portfolio and third-party vendor spend as well as accelerating IT optimization efforts. The company will continue to prioritize innovations that generate highly differentiated products that are valued by Illumina's customers.
I will now invite the operator to open the line for Q&A. Thank you.