On August 12, U.S. photonic device manufacturer Coherent announced its FY2026 Q4 and full-year results ending June 30. According to the company’s earnings release, quarterly revenue reached $2.046 billion, an increase of 33.8% year-over-year. The table in this latest quarterly report is marked as unaudited.
The company’s management frames demand within the context of the transition from copper to optical connectivity in AI data centers, expansion of manufacturing capacity, and ramp-up of new growth platforms. However, directly translating this report as “more AI optical interconnects sold” oversimplifies the financial statements. The company’s current segment reporting is divided into “Data Center and Communications” and “Industrial,” and it does not publicly break out quarterly revenues for AI data centers, traditional communications, or other specific product categories.
What truly warrants closer inspection are the four tables within the same disclosure. Revenue trends for FY2026 show consistent upward growth, with year-over-year changes in segment revenue highly concentrated. Non-GAAP operating profit margins are outpacing gross margins. Fixed asset additions, inventory levels, and cash flow also experienced significant changes in the same fiscal year.
$2 billion—what kind of curve is that?
The key point of the first chart is not just the single tallest bar. According to Coherent’s quarterly earnings reports, revenue increased quarter-over-quarter in every period of this fiscal year, reaching $2.046 billion in the latest quarter with a 13.3% sequential growth rate. The continuous upward trend shown in the chart conveys more than just “surpassing $2 billion”—the most recent quarter is part of an ongoing growth trajectory.
According to the company’s FY2026 Q4 earnings announcement, the latest quarter’s statutory year-over-year growth rate is 33.8%. The company also disclosed a pro forma year-over-year growth rate excluding divested businesses; these two metrics serve different calculations and should not be conflated as the same growth rate.
The company's revenue guidance for FY2027 Q1 is $2.2 billion to $2.4 billion. According to the company’s announcement, this is a forward-looking estimate for the next quarter and should be presented separately from actual quarterly revenue; it should not be construed as orders or recognized revenue.
Where did the extra income go?
The second chart breaks down the year-over-year revenue change into two opposing forces. According to the company's segment revenue table for FY2026 Q4, the data center and communications segment increased by $597 million compared to the same period last year.
The industrial segment decreased by $0.81 billion year-over-year, resulting in a net increase in total company revenue of $5.16 billion. This means that the increase from the data center and communications segments exceeded the company’s overall net increase, with the decline in the industrial segment offsetting part of the growth.
According to the same segment revenue table, the data center and communications segment generated $1.615 billion in Q4 revenue, accounting for approximately 79% of the company’s quarterly revenue. This proportion indicates that revenue is heavily concentrated in this segment, but it does not mean that 79% stems solely from AI optical interconnects. The financial report does not provide breakdowns by product, customer, or order, so the exact contribution of any specific product cannot be inferred from the segment name.
The value of this chart lies in its ability to show two lines simultaneously. While company disclosures can confirm which segment is driving growth, the financial statements do not reveal which products and customers make up that segment. These two aspects should not be mixed together.
Why is the operating profit margin rising faster?
Higher revenue does not automatically mean improved profitability. According to the company’s earnings report, Coherent’s non-GAAP gross margin increased from 38.1% in FY2025 Q4 to 40.2% in FY2026 Q4, meaning more profit remains after deducting direct costs from each dollar of revenue.
Non-GAAP operating profit margin increased from 18.0% to 21.8% during the same period. According to the company’s earnings announcement, the year-over-year increase in operating profit margin for Q4 was greater than that of gross margin, as indicated in the chart.
The non-GAAP sales, general, and administrative expense ratio decreased, while the research and development expense ratio rose slightly. According to the company’s earnings announcement, these expense ratio changes occurred alongside gross margin movements during the period of profit margin improvement, but are insufficient on their own to attribute the entire improvement to any single cost initiative.
Also pay attention to the reporting口径 of the charts. Non-GAAP metrics exclude stock-based compensation, amortization of intangible assets related to acquisitions, restructuring, and other items. According to the company’s announcement, it is a supplementary measure used by management to assess ongoing operating performance and is not intended to replace GAAP financial statements.
Coherent didn’t just sell more products during this period. Its revenue, gross margin, and some expense ratios all moved together, affecting its operating profit margin—but the public financial statements don’t attribute this change to any single business line or cost item.
How long is the cash runway to sustain growth?
The last chart shifts the focus from the income statement to the cash flow statement. According to the company’s FY2026 cash flow statement, additions to PP&E amounted to $1.103 billion, approximately 2.5 times that of the prior fiscal year. Management stated that capital allocation is prioritized toward expanding manufacturing capacity, but this investment cannot be directly equated to expansion spending for any specific product line or customer.
In the same fiscal year, cash flow from operating activities decreased from $634 million to $80 million. According to the company’s balance sheet, ending inventory increased from $1.438 billion to $2.581 billion.
These three changes occurred in the same fiscal year, and the public disclosure did not provide a single causal breakdown among them.
According to the company’s cash flow statement, net cash flow from financing activities for FY2026 was $1.477 billion, including cash flows from equity issuance, borrowing, and debt repayment. This is a funding schedule distinct from the income statement and cannot be explained solely by quarterly revenue growth.
The focus of this earnings report is not simply to replace "data center and communications" with AI revenue. The revenue mix, profit margins, and changes in fixed asset additions and inventory on the cash flow statement all changed simultaneously in the FY2026 financial statements.