Broadcom Inc. (NASDAQ: AVGO) delivered a third quarter that rewrites the playbook for semiconductor scale. Revenue hit $29.6 billion, up 86% from a year ago and ahead of the $29.2 billion consensus. Non-GAAP diluted EPS of $3.32 cleared the $3.22 estimate by $0.10. The headline numbers are impressive, but they only hint at the underlying story: AI is no longer a growth driver for Broadcom. It is the business.
AI semiconductor revenue reached $16.7 billion in Q3, more than tripling year-over-year (+221%) and jumping 54% sequentially from Q2's $10.8 billion. That single line item now accounts for 56% of total company revenue, up from 29% a year ago. The semiconductor solutions segment as a whole more than doubled to $20.8 billion (+127% YoY), meaning non-AI chip revenue actually declined modestly. Infrastructure software grew 29% to $8.8 billion, but its share of the mix shrank to 30% from 43% a year earlier.
The beat itself was driven by operating leverage few companies of any size can match. Non-GAAP operating income jumped 92% to $20.1 billion, producing a non-GAAP operating margin of 67.9%, up from 65.5% a year ago. Free cash flow of $13.7 billion represented 46% of revenue, a conversion rate reflecting both the capital-light nature of Broadcom's fabless model and the high-margin software annuity stream. Cash from operations of $14.2 billion more than doubled from $7.2 billion a year ago.
Management's Q4 guidance is the real signal. Revenue of approximately $34.8 billion implies 93% year-over-year growth, accelerating from Q3's 86% pace. AI semiconductor revenue is expected to hit $21.7 billion, up 236% YoY and representing 62% of guided revenue. Non-GAAP operating margin is forecast at 66%, flat with a year ago but down slightly from Q3's 67.9%. That margin guidance suggests management sees incremental investment spending or mix pressure ahead, even as top-line growth accelerates.
The capital allocation story is straightforward. Broadcom declared a $0.65 quarterly dividend, payable September 30. The company spent $3.1 billion on dividends in Q3 and $8.5 billion on share repurchases year-to-date through Q2, though no buybacks occurred in Q3. With $24.0 billion in cash and equivalents against $59.4 billion in total debt, the balance sheet remains investment-grade and well-positioned to fund both organic growth and the VMware integration.
Broadcom's AI revenue is not just growing; it's accelerating sequentially at a pace that suggests capacity constraints are being resolved faster than expected. Custom AI accelerators and networking are the twin engines, and the Q4 guide implies that demand is broadening rather than concentrating. By contrast, the non-AI semiconductor business appears to be treading water. The software segment's decelerating growth rate (29% vs. 43% a year ago) bears watching as VMware integration matures. For now, the AI flywheel is strong enough to carry the entire story. The question investors should ask is how long that can last before margins face pressure from the sheer weight of revenue mix shift toward hardware.