ON · ON Semiconductor

The thesis

ON Semiconductor (onsemi) is modestly more likely to beat the S&P 500 over the next three months. The reason is its AI data-center power business: revenue there was $180 million in the third quarter, up 175% from a year earlier, and on 2 November 2026 management raised its 2030 target to more than $3 billion. The fourth-quarter report, expected in early February 2027, will show whether that growth can offset a shrinking automotive business. The revenue guide for that quarter is $1.715 billion to $1.815 billion.

The 2 November 2026 report came in inside guidance. Revenue was $1,722 million, up 11% from a year earlier. Free cash flow was $489 million, and non-GAAP diluted earnings per share were $0.90 (onsemi results release). Gross margin in the quarter to 2 October 2026 was 41.4% in the 10-Q, up from 37.9% a year earlier. Operating margin was 22.0%.

The shares fell in the chip-sector selloff and then partly recovered. They closed at $63.31 on 6 November 2026 and at $71.06 on 13 November 2026, still 14.8% lower than three months earlier. Since the report the company has signed a $1.75 billion credit line and launched a new silicon carbide chip platform. The next event on the calendar is the Synaptics shareholder vote on 17 November 2026.

Bullish and bearish views on ON Semiconductor Corporation

The bull case on ON Semiconductor Corporation (ON), in brief: AI revenue is compounding. The bear case: order book is shrinking.

Bull case

• AI revenue is compounding. AI data-center revenue was $180 million in the third quarter. That is up 39% from the second quarter and 175% from a year earlier (onsemi, 2 November 2026). Management expects about $620 million for 2026 and roughly double that in 2027.
• Fourth-quarter guidance points higher. The company guides revenue of $1.715 billion to $1.815 billion and non-GAAP gross margin of 41.5% to 43.5%, against 41.2% reported for the third quarter (earnings call, 2 November 2026). It expects AI data-center revenue to rise at a mid-teens rate and industrial revenue at a low-double-digit rate.
• Margins and cash are recovering. Operating margin rose from −3.5% in the quarter to 3 April 2026 to 22.0% in the quarter to 2 October 2026 (10-Q filed 2 November 2026). Free cash flow was $1,617 million over the four quarters to 2 October 2026.
• New silicon carbide platform launched. On 10 November 2026 onsemi launched EliteSiC M4, its fourth-generation silicon carbide platform and its first to use a trench design. The company claims up to 30% higher power density and 35% lower losses than the previous generation (Compound Semiconductor, 10 November 2026). 750-volt bare die for electric-vehicle drive units are available now, and parts up to 1,200 volts are planned from 2027.
• Liquidity added before the deals close. On 12 November 2026 onsemi signed an amended $1.75 billion revolving credit facility, agented by JPMorgan Chase Bank, which matures on 12 November 2031. Nothing was drawn at signing (8-K, 12 November 2026). This adds to the up to $2.45 billion term loan Morgan Stanley committed for the Synaptics purchase (Yahoo Finance, 1 October 2026).

Bear case

• Order book is shrinking. Backlog was $5,500 million at 2 October 2026, down 32.1% from a year earlier. Deferred revenue fell 54.8% to $69 million (10-Q filed 2 November 2026).
• Automotive keeps falling. Management guided fourth-quarter automotive revenue down at a high-single-digit rate (earnings call, 2 November 2026). Automotive is roughly half of the legacy business.
• Silicon carbide expansion cancelled. On 6 November 2026 onsemi and the Czech Ministry of Industry and Trade agreed to end the Rožnov silicon carbide expansion. The project was announced in 2024 at up to $2 billion. The company cited market conditions and project economics.
• Brokers cut targets after the report. Citigroup kept its Neutral rating and cut its target to $80 on 4 November 2026. Rosenblatt (Neutral, $80), Truist (Hold, $76) and TD Cowen (Hold, $75) also sit close to the share price (Benzinga, 3 November 2026 and 4 November 2026).
• Two cash deals add debt. Synaptics costs about $5.7 billion at $123 a share in cash, and Ferric $600 million in cash. At 2 October 2026 the company held $4,368 million of cash against $4,505 million of debt, so net cash was −$137 million (10-Q). The new revolver caps total net leverage at 4.00 times (8-K, 12 November 2026).

Price setup

The shares closed at $71.06 on 13 November 2026. That is below the 50-day moving average of $74.06 and the 200-day moving average of $82.78 (adjusted daily closes). The shares are 47.3% below the 52-week intraday high of $134.92 set on 3 June 2026. They are well above the 52-week closing low of $44.90 from 20 November 2025.

The low of the recent decline is the $63.31 close of 6 November 2026, the session after the 5 November 2026 chip selloff. The shares then rose to $69.11 on 9 November 2026 and $73.73 on 12 November 2026, before falling back to $71.06. The 50-day average is the first level above the price. Citigroup's and Rosenblatt's $80 targets sit beyond it.

The shares tripled from the November 2025 low to the June 2026 high and have since lost almost half their value.

Catalysts ahead

• 17 November 2026: Synaptics special shareholder meeting on the all-cash merger with onsemi. Approval needs a majority of Synaptics' outstanding shares. A yes vote leaves only non-US regulatory approvals before the mid-2027 target close; a no vote would change the cost and timing of the deal.
• ~31 December 2026 (est.): Expected close of the Ferric acquisition. Adds integrated voltage-regulator technology for AI processor power delivery, at a cash cost of $600 million plus up to $175 million in milestone payments.
• ~February 2027 (est.): Fourth-quarter 2026 results. Shows whether revenue lands within the $1.715–$1.815 billion guide and whether AI data-center growth outruns the guided high-single-digit fall in automotive revenue.

What would change the view

A daily close below $66.60, which would undo most of the rebound from the $63.31 close of 6 November 2026 and show the sector selloff outweighing the AI growth. Fourth-quarter 2026 revenue under the $1.715 billion guidance floor, or a cut to the 2027 AI data-center outlook, would also prove the call wrong.

The risks this note tracks, each with what would confirm it:

• The decline in automotive outweighs AI growth, and fourth-quarter revenue misses the guide. Confirmed by: fourth-quarter revenue below the $1.715 billion guidance floor, or automotive revenue falling by more than the guided high-single-digit rate.
• The shrinking order book shows demand weakening further into 2027. Confirmed by: backlog in the next 10-Q falls below the $5,500 million reported at 2 October 2026.
• The chip-sector selloff resumes and drags the shares down whatever the company reports. Confirmed by: a close below the 6 November 2026 low of $63.31 while company guidance stands unchanged.
• Debt and cash spent on Synaptics and Ferric weigh on earnings and flexibility. Confirmed by: a filing showing drawn borrowings or interest costs that push net leverage toward the 4.00 times covenant in the 12 November 2026 credit agreement.
• The AI data-center outlook is cut before results support it. Confirmed by: management lowers the roughly $620 million 2026 AI revenue forecast or the expected doubling in 2027.

What it trades with

onsemi trades with the broad chip group. Benzinga reported on 5 November 2026 that chip stocks had their worst day since 2020, and the shares fell after that session despite a report that landed inside guidance. The AI power business links the stock to hyperscaler data-center spending and to higher-voltage rack designs. The legacy business links it to automotive and industrial demand. If the Synaptics purchase closes, it adds exposure to consumer devices and wireless connectivity; the target close is mid-2027.