Coherent's Revenue Is Surging, but Cash Conversion Has Broken Down

Coherent's fiscal fourth-quarter revenue reached $2.05 billion, up 34% from a year earlier, as AI data-center demand lifted its photonics business. The operating story is strong. The cash-flow story is not.

For fiscal 2026, Coherent reported net income attributable to the company of $769.9 million, while its SEC filing showed only about $79.5 million of operating cash flow. Capital expenditure then pushed free cash flow to roughly negative $1.02 billion, according to the source analysis based on the filing.

Profit and cash moved apart

Operating cash flow is measured before capital expenditure, so the shortfall cannot be explained simply by factory investment. Working capital, timing and other balance-sheet movements need to be examined. The gap does not mean reported earnings are false, but it does mean investors should avoid treating income as immediately available cash.

Coherent is investing into a large opportunity. Its new PhotonLink platform combines lasers, detectors and fiber for integrated optical links inside AI systems. Management said the platform could add about $30 billion to its 2030 addressable market, on top of roughly $60 billion for the existing portfolio. That is a market-size estimate, not a revenue forecast.

The source article incorrectly mapped the story to Ciena's ticker. The company discussed is Coherent, whose ticker is COHR. Preserving that distinction is essential because Ciena and Lumentum fell in the same sector selloff but have different financial statements and exposures.

The next quarter needs to show whether record demand can produce working-capital improvement while Coherent expands capacity. Revenue growth and new products justify attention. Until operating cash flow recovers, however, long-range price targets that assume smooth cash generation deserve skepticism.