Lumentum Holdings stock fell 8.6% on August 11 ahead of the company’s fiscal fourth-quarter 2026 earnings report, which was set to release after market close today. The optical-networking supplier’s decline reflects profit-taking among investors after the stock surged 142% year to date before today’s session, according to trading data and market analysis.
The selloff is part of a broader cooling in the AI-optics sector, with rival Coherent stock dropping 12% the same day. However, the decline appears targeted at richly valued optics names rather than a sign of weakness in semiconductor demand overall. The iShares Semiconductor ETF fell just 1% on the same day, indicating the pullback is specific to optical-component suppliers tied to artificial intelligence data center buildouts.
Lumentum trades at a trailing 12-month price-to-earnings ratio of 145.91x, suggesting the stock was priced for perfection heading into today’s earnings announcement. Both Lumentum and Coherent had rallied sharply on speculation about U.S. restrictions on Chinese optical transceivers, but community discussion has since turned to sector-rotation concerns and valuation pressures.
The company guided for fourth-quarter revenues between $960 million and $1.01 billion, representing roughly double the sequential growth from the third quarter. In Q3 fiscal 2026, Lumentum reported revenue of $808.4 million, up 90% year-over-year, according to company filings. Analysts expect the company to report earnings per share of roughly $2.90 to $3.03 on revenue near $987.7 million when results post after the close today.
The selloff caps a parabolic multi-week rally driven by strong demand for optical connectivity in AI infrastructure. Lumentum is positioned as a core supplier of photonics technologies for data centers, with management highlighting growth in transceivers, optical circuit switches, and optical scale-out and scale-up solutions. The company expects InP optical lane demand from AI data centers to grow at approximately 85% compound annual growth rate from 2026 to 2030, according to investor briefing materials.
Nvidia has invested $2 billion in Lumentum as part of efforts to secure advanced optical component supplies for its AI infrastructure buildout, underscoring the strategic importance of the relationship. The optical-networking sector has become central to hyperscaler spending on AI data centers, with Goldman Sachs identifying optical networking as a potential trillion-dollar opportunity tied to artificial intelligence expansion.
Options markets are leaning defensive ahead of the earnings call, with Lumentum’s full-chain put-call ratio at 1.54, suggesting traders are positioning for volatility. The company is scheduled to hold its earnings conference call at 5 p.m. ET today. Similar to other high-growth tech stocks reporting earnings, Lumentum’s results could trigger significant stock movement in after-hours trading and the following sessions.
Sources
- 24/7 Wall St. — Lumentum stock decline, profit-taking, valuation multiples, and earnings calendar context
- TradingView — Stock price decline of 8.61% in the past 24 hours
- Yahoo Finance — Q4 revenue guidance of $960 million to $1.01 billion
- Public.com — Analyst EPS estimate of $2.90
- Chartmill — Consensus EPS estimate of $3.03 and revenue estimate of $1.01 billion
- Investing.com — Q3 FY2026 revenue of $808.4 million and 90% year-over-year growth
- Moomoo — Analyst revenue estimate of $987.7 million
- IndMoney — Expectation that Lumentum will roughly double quarterly revenue
- Lumentum investor materials — 85% CAGR forecast for InP optical lane demand from AI data centers through 2030
