Lumentum and Broadcom: Both Have Seen The Light in AI But How Should Investors Play Them?

Broadcom (AVGO) posted $10.8 billion in AI semiconductor revenue while Lumentum (LITE) grew total revenue 109% YoY, as optics move to the center of the AI buildout.

CEO Michael Hurlston said Lumentum hit its target operating model a quarter ahead of schedule, with non-GAAP margins surging 2,160 basis points to 36.6%.

Broadcom suits investors seeking steady compounding via custom silicon and VMware cash flow; Lumentum offers concentrated exposure to AI's physical bandwidth bottleneck at a richly priced $932 per share.

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Broadcom (NASDAQ:AVGO) and Lumentum (NASDAQ:LITE) both just posted earnings that show optics moving to the center of the AI buildout. Broadcom reported Q2 FY2026 on June 3, 2026. Lumentum followed with Q4 FY2026 on August 11, 2026. Same tailwind, very different business shapes.

Broadcom keeps compounding at giant size. Semiconductor Solutions hit $15.009 billion, up 79% YoY, and AI semi revenue reached $10.80 billion, up 143% YoY. VMware added another $7.178 billion, giving Hock Tan a software annuity to lean on. Free cash flow ran at 46% of revenue. That is unusual for a company this large.

Lumentum is smaller but running hotter. Revenue crossed $1.006 billion, up 109.3% YoY, with Systems up 122.6% and Components up 102.7%. Non-GAAP operating margin jumped 2,160 basis points to 36.6%. CEO Michael Hurlston said the company is "reaching our target model more than a quarter ahead of schedule." That is a real acceleration on a clean base.

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Heat, power, and copper reach are choking rack-to-rack bandwidth, and both companies address that with light. Broadcom sells custom AI ASICs plus Ethernet AI switches; Tan guided Q3 AI semi revenue to $16.0 billion, growing over 200% YoY, and holds a public goal of exceeding $100 billion in AI sales by 2027. Lumentum sits one layer deeper in the stack, supplying InP lasers and optical switching that Broadcom-class systems depend on.

Polymarket traders assign a 74% probability that Broadcom clears its own $16 billion Q3 AI revenue bar. Confidence in the setup is high.

I will watch whether Broadcom's Q3 print lands closer to ~$29.4 billion in total revenue without VMware growth stalling. For Lumentum, the ramp on OCS (backlog above $400 million) and the multi-hundred-million-dollar CPO order slated for 1H CY2027 is what matters. A slip in either would sting after a 679.27% one-year run.

If I wanted platform control and steadier compounding, I'd lean toward Broadcom. The mix of custom silicon, Ethernet switching, VMware cash flow, and a $0.65 quarterly dividend gives it defense inside an AI cycle. If I wanted concentrated exposure to the physical bottleneck holding back AI clusters, Lumentum is the cleaner expression. Shares now trade at $932.47, so I'd size any new position with respect for how much good news is already in the price.

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