Management handed over next year's guidance unprompted and called 50% data center growth the base case.
Thesis: MACOM owns internal indium phosphide fabs plus epitaxy, and a $61M IQE stake upstream. Gross margin expanded 120bps sequentially while management admitted input cost inflation on labor, electricity, and raw materials. That is pricing power at a bottleneck. The structural driver is hyperscalers moving scale-up fabrics from passive copper to fiber, pulling 800G and 1.6T PAM4 content through merchant transceivers into MACOM's TIAs, drivers, and photodetectors. Book-to-bill of 1.6 against a rising trend line means the order book builds faster than they can ship, and capacity adds come online in under one year.
Verdict: LONG — Conviction: HIGH
Catalyst: Q1 fiscal 2027 bookings confirming the 1.6 book-to-bill converts to revenue, plus completion of the 3-inch to 6-inch MESC conversion in four to six months unlocking the UK defense order management named.
Key Risk: Hyperscaler capex air pocket. Data center heads from 40% of revenue toward 45%+ with no consumer end-market to catch a capex pause, and backlog cancellation terms were never disclosed.
The Tell: Unprompted, Daly annualized the Q4 midpoint into fiscal 2027 and put 27-28% company growth and 50% data center growth on the record, then capped it with 'very much a base case.' He gave FY27 guidance one quarter early. Separately the CW laser slipped inside the same call: script says potential production start late calendar 2027, then Q&A says 'if we're able to bring a CW laser into production in 2028.'
Friction Level: MODERATE_FRICTION — Both sides accept the reported numbers. Disagreement is whether the record 1.6 book-to-bill is firm backlog or double-ordering during the indium phosphide DFB shortage, and whether FY2027's 27-28% company growth with 50% data center is base case or peak.
2026Q3 · Aug 6, 2026
4 of 5 readings agreed4 LONG · 1 HOLDRead the full call
Book-to-Bill 1.6, Margins Expanding Through Input Cost Inflation
MACOM owns internal indium phosphide fabs plus epitaxy, and a $61M IQE stake upstream. Gross margin expanded 120bps sequentially while management admitted input cost inflation on labor, electricity, and raw materials. That is pricing power at a bottleneck. The structural driver is hyperscalers moving scale-up fabrics from passive copper to fiber, pulling 800G and 1.6T PAM4 content through merchant transceivers into MACOM's TIAs, drivers, and photodetectors. Book-to-bill of 1.6 against a rising trend line means the order book builds faster than they can ship, and capacity adds come online in under one year.
Unprompted, Daly annualized the Q4 midpoint into fiscal 2027 and put 27-28% company growth and 50% data center growth on the record, then capped it with 'very much a base case.' He gave FY27 guidance one quarter early. Separately the CW laser slipped inside the same call: script says potential production start late calendar 2027, then Q&A says 'if we're able to bring a CW laser into production in 2028.'
Twelve consecutive quarters of sequential operating income and EPS gains. Q3 revenue $342.2M up 18.4% sequentially, adjusted EPS $1.40 vs prior $1.09, guide to $415-425M with EPS $1.97-2.03. Beat and raise again.
Book-to-bill trend line 1.3, 1.5, 1.6 across the first three quarters of fiscal 2026 with highest quarterly bookings ever. Orders booked and shipped within the quarter only 11% of revenue, so 89% ships against prior-quarter orders.
Gross margin 59.7%, up 120bps sequentially, guided to 60-61% with another 130bps step, while management explicitly confirms input cost inflation on labor, electricity, and raw materials. Utilization leverage is outrunning cost inflation.
Daly on input costs: 'we try to pass those costs on to customers when possible... even during the last year or so... we've been able to expand our gross margins.' InP DFB shortage has customers 'coming to us with urgency.'
$60-65M capex fiscal 2026, again ~$60M in fiscal 2027 including laser ramp infrastructure, plus a $61M IQE stake locking upstream supply. Management is funding capacity while demand outruns it.
1.6 book-to-bill booked into what management itself calls a 'general supply shortage of indium phosphide DFB lasers' where customers act with urgency. No cancellation terms, booking horizon, or firm-versus-nominal mix disclosed.
Data center growth 35%, 48%, 74% across three years, and the CEO just told the Street that annualizing Q4 midpoint gives fiscal 2027 at 27-28% with data center at 50%, calling it 'very much a base case.'
Daly said utilization 'is definitely driving some of our lead times out' while inventory simultaneously built to $281.5M. Presented as a positive while it caps what they can ship.
+82
CONFIDENT"'Record' appears six times. Daly volunteered FY27 annualized numbers unprompted, called a 5,000-hour HTOL test 'exceptional,' and named a UK defense order 'one of the largest in MESC's history' with a four-to-six month completion window. Zero hedging outside the CW laser."
Full transcript with segment-level revenue, book-to-bill trend line 1.3/1.5/1.6, DSO, inventory turns, cash flow, capex, tax rate, and direct answers on China, copper, NPO, and input costs. Specifics on every follow-up.
Q1 fiscal 2027 bookings confirming the 1.6 book-to-bill converts to revenue, plus completion of the 3-inch to 6-inch MESC conversion in four to six months unlocking the UK defense order management named.
Hyperscaler capex air pocket. Data center heads from 40% of revenue toward 45%+ with no consumer end-market to catch a capex pause, and backlog cancellation terms were never disclosed.
The verdict is public. The case behind it is Pro: the forensic reading of guidance and language, the bull and bear cases, the red flags, and the play. It opens to everyone on Nov 4, 2026.