Coherent beat and guided above consensus, and the stock still slipped after hours

by Margaret Ashworth · August 12, 2026

Senior Analyst, Frontier Tech Wire

Coherent Corp. reported fourth-quarter and full-year fiscal 2026 results after Wednesday's close, and the numbers were comfortably ahead of what analysts had modeled. June-quarter revenue was $2,045.5 million, up 33.8% year over year and 13.3% sequentially. Non-GAAP earnings per share were $1.74 and GAAP EPS was $1.19. Investing.com reported that revenue topped a $1.98 billion consensus and that non-GAAP EPS beat a $1.62 estimate. GuruFocus reported the same beat against a $1.14 GAAP estimate and a $1.99 billion revenue estimate.

The market's answer was not straightforward. Coherent shares closed Wednesday's regular session at $355.64, up 8.24% on the day, per StockAnalysis market data. In extended trading after the release they were quoted at $346.00, down 2.71% from the close, as of 7:59 p.m. ET. Investing.com, writing earlier in the evening, put the after-hours decline at 3.3% and characterized the move as a textbook sell-the-news reaction, noting that options markets had been pricing an implied move of roughly 15% and that much of the good news had already been absorbed into the price before the release.

There is a reasonable case for that reading in the preceding week's tape. On Aug. 10, 24/7 Wall St. reported that Coherent fell 12% to $333.83 and Lumentum dropped 7% to $830.05, attributing the selloff to profit-taking and pre-earnings de-risking in two AI optical-networking names that had run hard — Coherent up 105% year to date and Lumentum up 142% at that point. Then Lumentum reported on Aug. 11 with June-quarter revenue of $1.01 billion, up 109% year over year, adjusted EPS of $3.23 against a $2.97 estimate, and non-GAAP gross margin above 50%, according to 24/7 Wall St. Coherent rallied into its own print on the read-across, and by Wednesday's close a good deal of the outcome was already in the share price.

The underlying business detail is what will matter beyond the overnight move. Datacenter and communications revenue was $1,615.0 million in the fourth quarter against $430.5 million for the industrial segment, making the AI-adjacent side of Coherent roughly four-fifths of the quarter. GAAP gross margin was 38.5%, up 277 basis points year over year, and non-GAAP gross margin was 40.2%, up 215 basis points. For the full fiscal year, revenue was $7,118 million, up 22.5%, with GAAP EPS of $4.12 against a loss of $0.52 the prior year and non-GAAP EPS of $5.61 against $3.53.

Chief executive Jim Anderson tied the results directly to a physical-layer transition inside AI data centers. "Fiscal 2026 was an outstanding year for Coherent, with record revenue, significant margin expansion, and non-GAAP EPS growth that was more than twice the rate of revenue growth," he said in the release. "We enter fiscal 2027 with exceptional customer demand, expanding production capacity, and multiple new growth platforms beginning to ramp. As AI datacenter architectures increasingly transition from copper to optical connectivity, we believe Coherent's broad photonic technology portfolio and manufacturing scale uniquely position us to deliver accelerating growth and capitalize on this multi-year opportunity."

Chief financial officer Sherri Luther pointed to capacity as the near-term spending priority. "Strong operational execution across our business drove meaningful gross margin expansion and converted our top-line revenue growth into robust GAAP and non-GAAP EPS growth," she said. "As we enter fiscal 2027, we remain disciplined in our capital allocation, prioritizing investments to expand manufacturing capacity so we can efficiently fulfill the ongoing acceleration in customer demand."

The guidance is where the acceleration shows up. For the first quarter of fiscal 2027, Coherent guided revenue to $2.2 billion to $2.4 billion, non-GAAP gross margin to 39.5% to 41.5%, non-GAAP operating expenses to $400 million to $420 million and non-GAAP EPS to $1.85 to $2.05. The midpoint of that revenue range sits above the quarter just reported, and Investing.com noted the guidance exceeded consensus. Coherent ended the year with $1.16 billion in cash and equivalents.

Read alongside Lumentum's report a day earlier and Applied Optoelectronics' record quarter, the pattern across the optics supply chain this week is consistent: revenue is growing faster than the companies can add manufacturing capacity, and every management team is describing capacity, not demand, as the binding constraint. That is a favorable operating backdrop, but it is also a fragile one — capacity additions are capital commitments made against order books that assume AI data center buildouts continue at the current pace.

For now, the mismatch between Coherent's numbers and its after-hours quote is a positioning story rather than a fundamentals story. The company beat on revenue, beat on non-GAAP EPS, expanded margins and guided the September quarter above where the Street was. What it could not do was clear a bar that an 8.24% pre-release rally had already raised. Thursday's regular session will be the first full-volume test of the print.