Broadcom’s 46% cash margin is the AI-chip number to watch

Broadcom gave equity investors a clean test: whether AI-chip growth can remain a cash business rather than just a revenue story. The thesis-carrying number is 46%, calculated as $13.665 billion of free cash flow divided by $29.591 billion of revenue, which equals 46.2%, rounded to 46%. That is the figure that matters more than the stock’s immediate reaction, because it says how much cash the company converted from each sales dollar while demand for custom AI accelerators and networking was still accelerating.

The market reaction was not euphoric. MarketWatch reported Broadcom down 5.3%, which means a $100 position became $94.70 by the arithmetic $100 multiplied by (1 minus 0.053). The reason was not a bad quarter. It was that the next-quarter sales guide of $34.8 billion barely cleared the FactSet consensus cited by MarketWatch at $34.7 billion: $34.8 billion minus $34.7 billion equals $0.1 billion, and $0.1 billion divided by $34.7 billion equals 0.3%. For a stock already priced around a large AI ramp, a 0.3% revenue-guide cushion is thin.

Context

Broadcom’s latest fiscal-quarter release, filed with the SEC as an exhibit to an 8-K and also posted on the company’s investor site, showed revenue of $29.591 billion versus $15.952 billion a year earlier. The growth calculation is $29.591 billion minus $15.952 billion, which equals $13.639 billion; $13.639 billion divided by $15.952 billion equals 85.5%, rounded to the reported 86%.

Investor’s Business Daily reported that adjusted earnings per share were $3.32 against a FactSet estimate of $3.22. The earnings beat was $0.10 per share, calculated as $3.32 minus $3.22; $0.10 divided by $3.22 equals 3.1%. IBD also cited revenue of $29.59 billion against an estimate of $29.24 billion, a $0.35 billion beat calculated as $29.59 billion minus $29.24 billion; $0.35 billion divided by $29.24 billion equals 1.2%.

The AI line was stronger than the headline beat. Broadcom said AI semiconductor revenue was $16.7 billion and grew 221% year over year. A 221% increase means current revenue equals 321% of the prior-year base, so the implied prior-year AI semiconductor revenue is $16.7 billion divided by 3.21, or $5.20 billion. The dollar increase is $16.7 billion minus $5.20 billion, or $11.50 billion. The growth rate checks as $11.50 billion divided by $5.20 billion, or 221%.

For the next quarter, Broadcom expects AI semiconductor revenue of $21.7 billion. The sequential increase from $16.7 billion to $21.7 billion is $5.0 billion, calculated as $21.7 billion minus $16.7 billion. The sequential growth rate is $5.0 billion divided by $16.7 billion, or 29.9%. The company also said that next-quarter AI semiconductor revenue would be up 236% year over year; that implies a prior-year base of $21.7 billion divided by 3.36, or $6.46 billion.

The analysis

Broadcom is not just selling more chips. It is, for now, turning the AI cycle into cash. Cash from operations was $14.197 billion, and capital expenditures were $0.532 billion by the arithmetic embedded in free cash flow: $14.197 billion minus $13.665 billion equals $0.532 billion. Free cash flow was $13.665 billion, so free cash flow margin was $13.665 billion divided by $29.591 billion, or 46.2%, rounded to 46%.

That is unusually important because chip booms often absorb cash before they produce it. Capacity commitments, inventory, supplier prepayments, and customer concentration can make reported revenue look better than owner economics. Broadcom’s reported quarter went the other way. Free cash flow rose from $7.024 billion to $13.665 billion, an increase of $6.641 billion calculated as $13.665 billion minus $7.024 billion. The growth rate was $6.641 billion divided by $7.024 billion, or 94.5%, rounded to the company’s 95% figure.

Segment mix helps explain the cash result. Semiconductor solutions revenue was $20.839 billion, and infrastructure software revenue was $8.752 billion. Total revenue was $29.591 billion, so semiconductors were 70.4% of the company, calculated as $20.839 billion divided by $29.591 billion. Software was 29.6%, calculated as $8.752 billion divided by $29.591 billion. Rounded, that matches the company’s 70% semiconductor and 30% software split.

The software portion matters because it gives Broadcom a cash-flow base that pure chip-cycle stories do not always have. But the AI semiconductor number is still doing the heavy lifting. AI semiconductor revenue of $16.7 billion represented 56.4% of total company revenue, calculated as $16.7 billion divided by $29.591 billion. It also represented 80.1% of semiconductor revenue, calculated as $16.7 billion divided by $20.839 billion. The equity thesis therefore rests on a concentrated claim: custom AI accelerators and networking can scale while free cash flow margin stays closer to 46% than to a normalizing hardware-cycle level.

The next-quarter companywide guide implies a large sequential step. Revenue guidance of $34.8 billion compared with the latest $29.591 billion is an increase of $5.209 billion, calculated as $34.8 billion minus $29.591 billion. The sequential growth rate is $5.209 billion divided by $29.591 billion, or 17.6%. If AI semiconductor revenue rises by $5.0 billion over the same period, then AI chips account for roughly 96.0% of the guided sequential revenue increase, calculated as $5.0 billion divided by $5.209 billion.

That is why the stock can fall on good numbers. The company beat near-term earnings expectations, but the market is now marking the story against the durability of the AI ramp. A 0.3% revenue-guide cushion over consensus, calculated as $0.1 billion divided by $34.7 billion, does not leave much room for shipment timing, customer delays, or supply bottlenecks. The reported quarter was strong; the valuation question is whether strength has become the baseline rather than the upside case.

Risks and counterpoints

The risk is explicit: this analysis is wrong if the 46% cash conversion is not durable as AI revenue scales. The assumption that takes the conclusion down with it is that Broadcom can keep converting roughly $0.46 of free cash flow from each $1.00 of revenue while AI semiconductor sales become a larger share of the mix. If that margin falls to $0.35 of free cash flow for each $1.00 of revenue, the cash engine would be 23.9% smaller than the 46% anchor, calculated as ($0.46 minus $0.35) divided by $0.46.

Customer concentration is another risk. AI semiconductor revenue was 80.1% of semiconductor revenue, calculated as $16.7 billion divided by $20.839 billion. If a major customer delays a platform, shifts orders to another supplier, or dual-sources more aggressively, the arithmetic changes quickly. A $2.0 billion shortfall against the next-quarter AI target of $21.7 billion would be a 9.2% hit to that target, calculated as $2.0 billion divided by $21.7 billion.

There is also a quality-of-earnings issue. Broadcom guided non-GAAP operating income at about 66% of projected revenue. On $34.8 billion of projected revenue, that implies non-GAAP operating income of $22.968 billion, calculated as $34.8 billion multiplied by 0.66. The company said it could not reconcile that projected non-GAAP measure to GAAP without unreasonable effort. That does not make the guide unusable, but it means investors should keep the cash-flow statement, not only adjusted margins, at the center of the analysis.

What to do with it

Do not turn the quarter into a hot tip. The practical use is to build a scorecard for the next report. First, compare free cash flow margin with the 46.2% base, calculated as $13.665 billion divided by $29.591 billion. If revenue rises but free cash flow margin compresses sharply, the AI growth story is less valuable than the revenue line suggests.

Second, compare next-quarter revenue against $34.8 billion. A result of $36.0 billion would be $1.2 billion above guidance, calculated as $36.0 billion minus $34.8 billion, or 3.4% above guidance when $1.2 billion is divided by $34.8 billion. A result of $33.5 billion would be $1.3 billion below guidance, calculated as $33.5 billion minus $34.8 billion, or 3.7% below guidance when $1.3 billion is divided by $34.8 billion.

Third, watch whether AI semiconductor revenue keeps outrunning total revenue. The current relationship is 56.4% of total revenue, calculated as $16.7 billion divided by $29.591 billion. If that share keeps rising while free cash flow margin holds, Broadcom’s AI thesis becomes more cash-backed. If that share rises while cash conversion falls, the stock becomes more dependent on belief in future scale. The number to watch is still 46%, because that is where the company’s AI narrative meets dollars already collected.

Sources

• Broadcom Inc. Announces Third Quarter Fiscal Year 2026 Financial Results and Quarterly Dividend
• SEC Exhibit 99.1: Broadcom Q3 Fiscal 2026 Results
• MarketWatch: As Broadcom’s stock falls, Wall Street focuses on the company’s forecast
• Investor’s Business Daily: Broadcom Stock Falls Despite Better-Than-Expected Fiscal Q3 Results