Preliminary brief— based on press release only. Full analysis including management tone and Q&A will be added when the transcript is available.

ON · Q3 2025 Earnings

ON Semiconductor

Reported November 3, 2025

30-second summary

Revenue of $1.55B (+5.6% QoQ, -12% YoY) landed in the upper half of the Q3 guide, non-GAAP gross margin came in at 38.0% (top of the 36.5–38.5% range), and EPS of $0.63 ran near the high end of $0.54–$0.64. But Q4 guidance points to flat-to-slightly-down sequential revenue ($1.48–$1.58B) and a 37–39% gross margin band whose midpoint sits 50bps below the Q3 print — the recovery is real but not yet linear, and the AI data center narrative ($250M annualized) is finally sized.

Headline numbers

EPS

Q3 FY2025

$0.63

Revenue

Q3 FY2025

$1.55B

-12.0% YoY

Gross margin

Q3 FY2025

37.9%

Free cash flow

Q3 FY2025

$0.37B

Operating margin

Q3 FY2025

17.0%

Key financials

Q3 FY2025

Metric	Q3 FY2025	YoY	Q2 FY2025	QoQ
Revenue	$1.55B	-12.0%	$1.47B	+5.6%
EPS	$0.63	—	$0.53	+18.9%
Gross margin	37.9%	—	37.6%	+30bps
Operating margin	17.0%	—	13.2%	+380bps
Free cash flow	$0.37B	—	$0.11B	+251.0%

Guidance

Q3 FY2025 beat guidance on gross margin and EPS despite revenue landing within the lower half of range; Q4 guidance assumes flat-to-slight-down sequential revenue ($1.48–$1.58B) with modest margin compression and continued YoY headwinds.

Guidance is issued for both next quarter and the full year. Both may appear below.

Actuals vs prior guidance

Metric	Period	Prior guide	Actual	Δ	Result
Revenue	Q3 FY2025	$1.465 billion to $1.565 billion	$1.5509 billion	+$0 to -$0.014 billion above guide (within range, at lower end of expectations)	Beat
Non-GAAP EPS	Q3 FY2025	$0.54 to $0.64	$0.63	+$0.01 to +$0.09 above guide	Beat
Non-GAAP Gross Margin	Q3 FY2025	36.5% to 38.5%	38.0%	+0.5 to +1.5 percentage points above range midpoint	Beat
Operating Expenses	Q3 FY2025	$280 million to $295 million	within range (specific figure not disclosed)	in-line with guidance	Met

New guidance

Metric	Period	Guide	YoY
Revenue	Q4 FY2025	$1.48 billion to $1.58 billion	—
Non-GAAP EPS	Q4 FY2025	$0.57 to $0.67	—
Non-GAAP Gross Margin	Q4 FY2025	37% to 39%	—
Non-GAAP Operating Expenses	Q4 FY2025	$282 million to $297 million	—
Non-GAAP Tax Rate	Q4 FY2025	approximately 16%	—
Non-GAAP Diluted Share Count	Q4 FY2025	approximately 405 million shares	—
Capital Expenditures	Q4 FY2025	$20 million to $40 million	—

Segment performance

Q3 FY2025

Segment	Q3 FY2025	YoY
PSG (Power and Sensing Group)	$0.738B	-11.0%
AMG (Advanced Analog and Mixed Signal)	$0.583B	-11.0%
ISG (Intelligent Sensing Group)	$0.23B	-18.0%

Profitability

Q3 FY2025

Segment	Q3 FY2025
Free Cash Flow Margin	24.0%
Non-GAAP Gross Margin	38.0%
Non-GAAP Operating Margin	19.2%
Free Cash Flow YoY Growth	22.0%
Operating Cash Flow	$418.7 million

Other KPIs

Q3 FY2025

Segment	Q3 FY2025
Year-to-Date Share Repurchases	$925 million

Management tone

Q1 sliding through trough → Q2 cyclical bottom called → Q3 stabilization with seasonal patterns emerging

In Q2 management would only commit to "signs of stabilization." On this print Hassan upgraded the framing materially: per prepared remarks, "we've gone from the stabilization to now seeing seasonal patterns. I think that's the first step to recovery." The shift from a flat-line description to a cyclical-pattern description is the most consequential tone change of the quarter — but the Q4 guide does not yet ratify it with a sequential up-tick.

The AI data center story got sized for the first time. Last quarter management was asked twice to put a dollar figure on AI data center revenue and refused both times. On this print the company disclosed a $250M annualized run-rate and went further on competitive framing, with Hassan saying that out of the "crowded space of 13 or however many companies… who can go from wall to core, there's only two. And we are the share gainer." This resolves the single largest disclosure gap from Q2.

Silicon carbide expanded from a one-trick (BEV) story into a three-market story. Q2 framed SiC as automotive-BEV-led with timing risk. This quarter management explicitly added plug-in hybrids and range-extender EVs ("silicon carbide is now getting designed in even in plug-in hybrids") and AI data center PSUs ("silicon carbide in AI data centers was not even a conversation point. Today it is"). The TAM widening matters because SiC remains below corporate gross margin and needs volume to fix that math.

Die-bank inventory build shifted from passive to proactive. Last quarter inventory commentary was about waiting for OEM signals. This quarter Hassan framed the die-bank build as a deliberate investment to enable "quick turn on that mass market" — a posture that signals confidence in near-term demand but also explains why Q4 gross margin is guided down at the low end (utilization will fall as the build completes).

The caution is calibrated, not rhetorical. Hassan's own line — "I'm cautious, but I am also looking at the data in order to sound like I do. Our work is not done." — is the cleanest tone signature of the quarter. After four quarters of trough commentary, management is leaning into data-driven realism rather than declaring the cycle turn.

Recurring themes management leaned on this quarter:

Market stabilization and emerging seasonal patternsAI data center power delivery differentiationDie bank inventory build for mass market expansionSilicon carbide penetration broadening beyond BEV into PHEVs and data centersPortfolio diversification and customer count growthWaiting for consumer confidence and geopolitical stabilization to trigger OEM restocking

Risks management surfaced:

Geopolitical instability and supply chain disruptions (Xperia situation cited)Utilization expected flat to down in Q4 due to inventory build completionAutomotive market lumpiness from program ramps and timing shiftsChina solar deployment slowdown and tariff-driven market repricingReliance on consumer confidence signals for OEM restocking behavior

Answers to last quarter's watch list

Q3 revenue lands in upper vs. lower half of $1.465–1.565B guide — Landed in the upper half at $1.551B (+5.6% QoQ), validating the Q2 "automotive bottom" call and confirming the stabilization narrative.

Resolved positively

Gross margin direction at the Q3 print — Came in at 38.0%, 50bps above the guide midpoint and 40bps above Q2's 37.6%. But Q4 guide midpoint is flat at 38.0% with a 37% low end, so the utilization recovery has not yet broken into a margin step-up. Status: Resolved positively for Q3, continue monitoring trajectory

AI data center revenue disclosure — Resolved. Management disclosed a $250M annualized AI data center revenue stream and explicitly claimed share-gain leadership in wall-to-core power delivery. This is the single biggest disclosure shift of the quarter.

Resolved positively

Treo unit shipments and design funnel — Press release does not provide updated Treo unit or funnel figures; no transcript-only disclosures are confirmable from the available source.

Continue monitoring

Confirmation of the $50–100M 2026 portfolio exit dollar range — Not addressed in available source documents. ISG revenue down 18% YoY (vs. -15% in Q2) is directionally consistent with the human-vision exit pace but is not a confirmation.

Continue monitoring

Buyback pace vs. FCF — $925M YTD buybacks against meaningfully stronger Q3 FCF ($372M vs. $106M in Q2) means buyback intensity moderated relative to cash generation in Q3 — the H1 pattern of >100% FCF return appears to be normalizing.

Resolved positively

What to watch into next quarter

Whether Q4 gross margin lands above the 38.0% midpoint — the low end (37%) would mean die-bank build drag was underestimated; clearing the midpoint sustains the recovery narrative

AI data center run-rate growth from the disclosed $250M — now that management has anchored a figure, the next print should show acceleration or analysts will pressure-test the "share gainer" claim

Q1 2026 commentary on whether seasonal patterns hold — Hassan's "first step to recovery" framing only validates if Q1 follows a normal sequential pattern rather than another reset

ISG revenue trajectory as human-vision exits complete — Q3's -18% YoY is the worst of the three segments; watch for an inflection as the cleaner machine-vision base emerges

Free cash flow margin sustainability — 24% FCF margin and +22% YoY FCF growth on -12% revenue is the strongest operational signal in this print; whether it holds at sub-$1.55B revenue determines the cash-return capacity in 2026

Silicon carbide gross margin trajectory — still below corporate average; new PHEV and AI data center design-ins help volume but the margin question remains the 53% long-term bridge's hardest variable

Sources

ON Semiconductor Q3 2025 Press Release, 8-K Exhibit 99.1, filed November 3, 2025 — https://www.sec.gov/Archives/edgar/data/1097864/000114036125040094/ef20058125_ex99-1.htm
ON Semiconductor Q3 2025 prepared remarks and forward guidance commentary (transcript excerpts)

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