Will ON Semi’s Massive All-Cash Tech Bet Fuel a Massive Q3 Earnings Beat?

Third-quarter results from ON Semiconductor (NASDAQ:ON | ON Price Prediction) are due after the close on Monday, November 2. A $5.7 billion all-cash Synaptics (NASDAQ:SYNA) deal is pending, with AI data center sales accelerating. I’ll be watching whether this report can push margins past 40%.

AI Power Demand Meets a Bigger Ambition

Last quarter, onsemi posted revenue of $1.6035 billion, up 9.2% year over year and ahead of the $1.5894 billion consensus. Non-GAAP EPS of $0.74 exceeded the $0.7153 estimate, and free cash flow of $425.4 million quadrupled. The Power Solutions Group led with $829 million in sales, up 19%.

Chief executive Hassane El-Khoury raised expectations: “AI data center remains our fastest-growing business, and we now expect revenue to more than double in 2026.” Management guided Q3 revenue to $1,650M to $1,750M and non-GAAP EPS to $0.81 to $0.93.

Since then, the Synaptics agreement has become an all-cash deal, which removes the volatility of the earlier all-stock structure. The deal is still expected to close in mid-2027.

Consensus Calls for Nearly 40% EPS Growth

The Q3 EPS consensus has climbed from $0.8363 90 days ago. Over the past 30 days, analysts made 21 upward revisions and 3 downward.

Gross Margin and AI Mix Will Decide the Quarter

I’ll be watching gross margin first. Utilization rose to 83% from 77% in Q2, and management said each point adds 25 to 30 basis points to gross margin. Fab cycles of 4 to 6 months delay that benefit. A second round of price increases aims to offset rising costs for substrates, gold and external manufacturing.

AI data center mix comes next. Management guided the “other” category, which includes AI data center, up to the high teens in Q3. It expects automotive up low single digits and industrial relatively flat. Silicon carbide revenue in AI data center applications should grow nearly 60% in 2026. The power and cooling suppliers riding that same expansion are the subject of a free report on seven AI infrastructure names that aren’t chipmakers.

You should also watch supply. Lead times extended from about 27 weeks to somewhere around 32 weeks, and onsemi shipped AI orders ahead of automotive and industrial customers. I want to hear whether that allocation is declining.

Beyond that, look for updates on the Embedded Power Platform ramp, EliteSiC modules selected for Sungrow’s PowerTitan 3.0, and any disruption from selling off the Mountain Top and Philippines facilities. As for Synaptics, its 53.6% non-GAAP gross margin and 31% Core IoT growth explain why management expects the deal to lift margins.

Q4 Guidance Will Reset the Narrative

Analysts already expect Q4 EPS of $0.9589 on $1.74 billion in revenue. Shares outperformed competitors on Monday, even as Morgan Stanley (NYSE:MS) warned that support for chip stocks is below current levels. To meet those expectations, onsemi has to show that AI mix and higher utilization are lifting margins. If the Q4 guide supports that path, the Synaptics deal looks like expansion built on a strong base.

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