Revenue up 13%, margins up 120bps, opex up, and guided EPS lands at $0.45 versus $0.44. The tax rate ate the entire quarter's growth.
Thesis: Semtech's operating business is genuinely compounding: eight straight beats, 350bps semiconductor margin expansion, $59.1M quarterly FCF, leverage cut from 2.3x to 1.3x, and data center at $223M growing 58%. The constraint is real, HIFU gives them vertical InP capability at exactly the right node transition. But the FY27 EPS bridge is broken by a 72% guided tax rate versus 15% in FY26, which means the multiple-driving metric goes flat while revenue grows 13%+. The >50% data center guide requires ~$110M incremental with two-thirds back-half weighted and contingent on one hyperscaler's rack validation. The CPO risk is structural: CEO admitted 'in CPO, we may not have much content except for lasers,' and NVIDIA's multi-rack NVLink roadmaps push that direction.
Verdict: HOLD — Conviction: MEDIUM
Catalyst: CopperEdge 1.6T ACC production shipments to hyperscaler at end of Q1 plus rack-level volume mid-year proves the near-term growth vector. Section 48 tax credit qualification on HIFU capex may also offset part of the 72% rate if pretax profit geography normalizes.
Key Risk: FY27 data center guide of >50% growth requires $110M incremental revenue with ~two-thirds in H2 and dependent on single-hyperscaler rack validation completing on schedule. Stifel asked ACC size directly, got 'too early to tell.' If that one customer slips, the whole year's growth narrative collapses.
The Tell: Asked about CPO by Susquehanna's Rolland, CEO said: 'In CPO, we may not have much content except for lasers.' This is an unprompted admission that the pieces driving the 61.7% semiconductor gross margin franchise (TIAs, laser drivers) are exactly what CPO removes from pluggable modules, and NVIDIA's Alpenglow and Thunder multi-rack NVLink roadmaps push that direction. The response was NPO MSA, a specification in draft with no committed socket.
Friction Level: MODERATE_FRICTION — Both sides agree the operating data is strong and FCF is real. The disagreement is whether a 72% guided tax rate that flattens FY27 EPS invalidates the growth multiple, and whether a back-half-loaded data center guide dependent on one hyperscaler's rack validation can carry a >50% revenue target.
2026Q4 · Mar 16, 2026
4 of 5 readings agreed4 HOLD · 1 LONGRead the full call
Operating Engine Humming, Tax Rate at 72% Kills the EPS Story
Semtech's operating business is genuinely compounding: eight straight beats, 350bps semiconductor margin expansion, $59.1M quarterly FCF, leverage cut from 2.3x to 1.3x, and data center at $223M growing 58%. The constraint is real, HIFU gives them vertical InP capability at exactly the right node transition. But the FY27 EPS bridge is broken by a 72% guided tax rate versus 15% in FY26, which means the multiple-driving metric goes flat while revenue grows 13%+. The >50% data center guide requires ~$110M incremental with two-thirds back-half weighted and contingent on one hyperscaler's rack validation. The CPO risk is structural: CEO admitted 'in CPO, we may not have much content except for lasers,' and NVIDIA's multi-rack NVLink roadmaps push that direction.
Asked about CPO by Susquehanna's Rolland, CEO said: 'In CPO, we may not have much content except for lasers.' This is an unprompted admission that the pieces driving the 61.7% semiconductor gross margin franchise (TIAs, laser drivers) are exactly what CPO removes from pluggable modules, and NVIDIA's Alpenglow and Thunder multi-rack NVLink roadmaps push that direction. The response was NPO MSA, a specification in draft with no committed socket.
Management sells 94% FY26 adjusted EPS growth in prepared remarks while the same team guides FY27 adjusted EPS to $0.45 versus $0.44 in Q1 with a 72% tax rate for the full year. The operating results are real, but the metric driving the multiple just flatlined for twelve months.
The 50% data center growth guide rests on ACC shipments to one hyperscaler beginning at tail end of Q1, FiberEdge 1.6T 'significant ramp in the second half,' and linear equalizer onboard 'within the coming quarters.' When Stifel asked ACC size, CEO said 'too early to tell' on a business asked to carry the year.
HIFU is capacity limited before first sample shipments. CEO said 'we will be creative in combining the new and used market' for equipment, whole industry racing for epi and fab tools, and CW laser revenue not quantified pending equipment lead times. Sold out with no near-term way to fill it.
Eighth consecutive sequential revenue beat, Q4 revenue above guidance midpoint, adjusted EPS above midpoint, Semiconductor GM 61.7% above high end of guide. Track record of conservative guidance is documented across eight quarters.
Semiconductor Products gross margin at 61.7%, up 350bps YoY and above high end of guidance, driven by LoRa and data center mix. Operating leverage confirmed: Q4 opex $91.5M while adjusted operating margin hit 18.2%.
Both acquisitions cost less than one quarter of free cash flow. Leverage cut from 2.3x to 1.3x in one year. Q4 FCF of $59.1M up 91% YoY. Section 48 investment tax credit at 35% on HIFU capex. Balance sheet is not the constraint.
Consumer TVS beat relies on a 'geopolitical tailwind' the CFO called sustainable 'a number of quarters.' Cellular module divestiture still at 'external consultants' stage underlies $354M IoT base at 31.6% GM dragging blended margin to 51.6%.
+62
CONFIDENT"CEO gave specific numbers throughout: high-teens HIFU revenue, 50% data center growth, Q1 CopperEdge shipment timing, Section 48 tax credit details. CFO volunteered the 72% tax rate unprompted with full explanation. No deflection on core questions."
Full transcript with specific financials, segment breakdowns, guidance detail, and direct Q&A on the critical issues. Gaps: ACC revenue size unspecified, HIFU CW laser revenue not quantified, divestiture valuation unknown.
CopperEdge 1.6T ACC production shipments to hyperscaler at end of Q1 plus rack-level volume mid-year proves the near-term growth vector. Section 48 tax credit qualification on HIFU capex may also offset part of the 72% rate if pretax profit geography normalizes.
FY27 data center guide of >50% growth requires $110M incremental revenue with ~two-thirds in H2 and dependent on single-hyperscaler rack validation completing on schedule. Stifel asked ACC size directly, got 'too early to tell.' If that one customer slips, the whole year's growth narrative collapses.
Eight straight sequential beats, FY26 revenue $1.05B up 15%, adjusted EPS $1.71 up 94%. Semiconductor GM 61.7% up 350bps above high end of guide. Data center $223M FY26 up 58%, guided >50% for FY27 with Q1 alone showing 12% sequential growth. HIFU gives vertical InP capability from epi through wafer, content per module expanding from high single-digit in 800G to ~$80 in 3.2T. CopperEdge 1.6T ACC shipping to hyperscaler at end of Q1, FiberEdge 1.6T design wins ramping H2, linear equalizers across multiple customers. Balance sheet clean: leverage 1.3x down from 2.3x, both acquisitions under one quarter of FCF, Q4 FCF $59.1M up 91%, Section 48 ITC at 35% on capex. OFC demos show live 1.6T on NVIDIA switch platform and Tomahawk 6. Cell module divestiture advancing to diligence stage, removing low-margin drag.
The 72% FY27 tax rate versus 15% in FY26 means Q1 guide of $283M revenue up 13% and better margins lands EPS at $0.45 versus $0.44. Flat. The >50% data center guide needs $110M incremental, two-thirds back-half weighted, one hyperscaler dependent. ACC size: 'too early to tell.' Linear equalizers: 'within the coming quarters.' LPO Q4 came in at guided mid-single digit. HIFU CW laser revenue not quantified, capacity limited day one, whole industry racing for same tools, 'be creative combining new and used market.' Q1 semiconductor GM drops 130bps to 60.4% on HIFU ramp costs. CPO removes TIAs and drivers from module, CEO admitted 'may not have much content except for lasers.' NPO is a draft spec, no committed socket. Cellular divestiture still at external consultants stage. Consumer beat relies on 'geopolitical tailwind' CFO called sustainable 'a number of quarters.'
Say/Do Gap
Prepared remarks sell 94% FY26 EPS growth while the FY27 guide implies roughly flat adjusted EPS unless the 72% tax rate resolves. Same management team, twelve-month guide, largest swing factor moved from 15% to 72%.
Backlog Quality
Two-thirds of the $110M incremental data center revenue is second-half weighted and contingent on one hyperscaler's rack validation. CEO said 'too early to tell' on ACC size when Stifel asked directly.
Capacity Ceiling
HIFU capacity limited before shipping samples to requesting customers. CW laser revenue declined pending equipment lead times. Only 'high-teens level' FY27 contribution offered with no units. Epi and fab equipment supply constrained industry-wide.
AI Label Without Substance
Consumer beat driven by 'geopolitical tailwind' CFO called sustainable 'a number of quarters.' Cellular divestiture at external consultant stage. These are labeled as AI-adjacent growth but the drivers are trade policy and divestiture timing.
Hold. Operating data is clean and cash flow is real: do not short against $59.1M quarterly FCF and 350bps of margin expansion. Do not add into OFC either. The 72% tax rate removes the EPS growth that justifies the multiple, the >50% data center guide is back-half loaded on one customer's validation gates, and the CPO content hole is structural. Wait for Q1 CopperEdge shipment confirmation and the tax rate resolution. The asymmetry favors patience over position.