Earnings report beat expectations, but "optical communication giant" Coherent plunged after hours.

The "optical communications giant" delivered an impressive quarterly report card, but it failed to prevent its stock price from falling.

After the market closed on Wednesday, May 6th, Eastern Time, Coherent released its latest financial report, showing that revenue and earnings per share for the third quarter of fiscal year 2026 both surpassed Wall Street expectations, with gross margins steadily improving. However, its stock price plunged more than 7% in after-hours trading.

Analysts point out that the market response reveals a reality: After a surge of 86% this year driven by the AI infrastructure boom, the threshold for "exceeding expectations" has risen sharply among investors. As J.P. Morgan analysts Meta Marshall and Antonio Jaramillo had warned prior to the earnings report: Whether this quarter’s results can serve as a substantial catalyst for the stock price remains highly questionable.

After the financial report was released, this view was confirmed—the results were in line with expectations but lacked positive surprises. Coupled with the high valuation pressure from an accumulated 86% stock price increase this year, profit-taking sentiment was naturally released.

Over a longer cycle, Coherent’s fundamental logic remains intact. The company is one of the core beneficiaries in the AI data center infrastructure arms race—its optical interconnect technology is a critical underlying support for high-speed communication between AI chips. Company CEO Jim Anderson stated in the earnings report:

"With AI data center infrastructure continuing to expand, we are rapidly ramping up capacity to meet demand. We believe Coherent is in a uniquely advantageous position to seize this multi-year growth opportunity."

Comprehensive Outperformance, Gross Margin Steadily Rising

The financial report shows Coherent’s adjusted earnings per share for the third quarter reached $1.41, above Wall Street’s expectation of $1.40. Revenue rose 21% year-on-year to $1.81 billion, slightly exceeding analysts’ estimate of $1.78 billion.

Gross margin increased from 38.5% in the same period last year to 39.6%. CEO Jim Anderson stated that demand from the data center and communications business was "exceptionally strong," driving accelerated revenue growth and sustained margin expansion.

For the fourth quarter, Coherent expects earnings per share between $1.52 and $1.72, revenue ranging from $1.91 billion to $2.05 billion, and gross margin expected to further climb to 41%.

However, the interpretation of this guidance is rather nuanced. Wall Street previously expected fourth quarter earnings per share of $1.55 and revenue of $1.913 billion—both near the lower end of Coherent’s guidance range.

J.P. Morgan analysts Marshall and Jaramillo wrote in their April 30th research report that the market’s focus regarding Coherent’s earnings is on gross margin performance and whether the company can "fully capitalize on the tight supply opportunities in the optical component market."

The two analysts also pointed out that although investor interest in Coherent has recently increased, they do not believe this quarterly report constitutes a substantial catalyst for the stock price.

AI Data Center Boom Lifts Valuation, High Expectations a Double-Edged Sword

Coherent’s business logic is highly tied to AI infrastructure construction.

The optical networking technology the company produces is a key infrastructure for communication among AI processing chips. The expansion of capital expenditure by hyperscale cloud computing vendors directly drives its order demand. Peer company Lumentum has also benefited from this trend, with both companies’ stock prices rising sharply with the wave of hyperscale vendors’ capital spending.

In March this year, Nvidia announced $2 billion investments each in Lumentum and Coherent, and signed multi-billion dollar purchase commitments with both companies, further strengthening market optimism for the optical communications sector.

This high-expectation environment makes "meeting expectations" insufficient to drive the stock price upwards. Lumentum’s third quarter financial report released after the close on Tuesday showed a similar pattern—revenue surged but was slightly below Wall Street’s higher expectations, resulting in a 5% decline in stock price on Wednesday.

Meanwhile, Corning and Nvidia announced a partnership on Wednesday to significantly expand the production of domestic optical fiber and optical connectivity products in the U.S., bringing new focus to the entire optical communications industry chain.

Risk DisclaimerThe market has risks; investment must be cautious. This article does not constitute individual investment advice, nor does it take into account special investment goals, financial conditions, or needs of individual users. Users should consider whether any opinions, views, or conclusions in this article suit their particular situation. If you invest based on this, you do so at your own risk.