Iran rejects U.S. war proposal, says no talks before conditions met
Communication technology companies have been red hot lately, with several leading names within the communication equipment industry surging triple digits year-to-date (YTD). It’s an industry that, before the second half of this year, had barely received any attention.
Instead, semiconductors, quantum computing, batteries, and even aerospace and defense stocks stole the limelight. But with the industry’s top players now severely outperforming both the broader sector and the market over the previous quarter, investors should probably be paying closer attention.
So, what’s driving the rally? Two words: Artificial Intelligence.
Explosive AI adoption has created an unprecedented need for high-speed, scalable, optical networking infrastructure. Hyperscalers and cloud giants are racing to build AI-optimized data centers at a scale that didn’t exist two years ago, driving a massive surge in orders for communication equipment.
This boom has directly benefited optical networking leaders like Ciena Corp., Lumentum Holdings, and Coherent Corp. These companies supply the critical infrastructure and equipment that’s required to interconnect tens of thousands of GPUs used for large-language-model training and inference.
Record growth, quarters of guidance raises, and expanding margins across the sector signal more than just a typical telecom recovery or even boom. Investors are witnessing the early innings of a multi-year expansion of AI-driven bandwidth, which may drive revenues and stock prices to levels not previously seen.
1. Ciena: Riding an AI-Driven Demand Wave
Ciena Corporation is a global leader in optical networking hardware, software, and services. The company’s high-capacity transport systems and packet-optical platforms are essential for service providers, enterprises, and cloud operators as they scale their networks in the AI era.
In Q3, reported on Sept. 4, Ciena delivered adjusted EPS of 67 cents, topping estimates of 53 cents, along with $1.21 billion in revenue, which also beat expectations. A notable data point from their earnings deck: non-telco customers represented 53% of total revenue, highlighting Ciena’s growing exposure to cloud providers rather than traditional telecom.
Direct cloud provider revenue surged 94% year-over-year (YOY), now representing 40% of total revenue, providing clear validation of the AI-related demand story. The company guided for Q4 revenue of $1.24–$1.32 billion and sees gross margins in the 42–43% range.
After a 136% YTD rally, CIEN trades at a headline P/E of 207. But its forward P/E of 45 offers a more realistic picture of expected growth. If the company continues posting strong cloud demand and the stock holds above its $180 support area, further upside could be on the table as capital continues rotating toward AI infrastructure leaders.
2. Lumentum: Benefiting From Explosive Cloud and AI Spending
Lumentum Holdings is a photonics provider powering the next generation of high-speed communication networks. The company produces lasers, optical subsystems, and modules used widely across telecom and hyperscale data centers.
Lumentum’s YTD performance has been remarkable, with the stock soaring 278% and pushing its market cap above $22.5 billion. Its P/E remains steep at over 200, but its forward P/E of 38 better reflects the accelerating earnings outlook.
For its fiscal Q4 2025, Lumentum reported EPS of 88 cents, beating consensus by 9 cents. Revenue grew 55.9% YOY to $480.7 million, easily topping expectations. Management credited the beat to robust cloud and AI-related demand, noting that the investment cycle in AI data centers continues to accelerate faster than previously projected.
While Lumentum remains well-positioned for long-term growth, its massive rally suggests investors may want to wait for a pullback or consolidation phase before considering new entries.
3. Coherent: Expanding Fast With AI Infrastructure Demand
Coherent is a leading manufacturer of lasers, optical components, and photonics-based systems used across communications, industrial, and semiconductor markets. And like its peers, the stock has delivered standout performance: up 72% YTD and nearly 90% this past quarter alone.
Coherent’s fiscal Q1 2026 results were strong: EPS of $1.16 beat estimates by 12 cents, while revenue climbed 17.3% year-over-year to $1.58 billion. Management, like the two names mentioned above, pointed to continued strength from AI data centers and communication customers, along with ongoing capacity expansions to meet swelling demand.
And like Ciena and Lumentum, Coherent’s P/E of 235 looks expensive, but its forward P/E of 25.5 paints a far more reasonable picture when accounting for accelerating growth and improving margins.
However, after such a substantial quarterly rally, investors should be cautious about chasing at current levels. Instead, a healthy pullback or higher-low formation could offer a more attractive entry point, especially if AI-related demand remains strong and the fundamental story continues to build.