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ON Semiconductorvs.Seagate

ON vs STX · both in Chips & accelerators, part of the AI & digital infrastructure value chain: Designs and builds the processors, accelerators and memory that train and run AI.

Seagate is about 6.0× larger than ON Semiconductor by market cap; ON Semiconductor trades at the lower P/E (47.5 vs 55.9); year to date, Seagate leads (+181.4% vs +46.6%).

Side by side

ONSTX
Market cap$29.9B$178B
Price$77.53$783.00
Today−2.4%+1.1%
Return YTD+46.6%+181.4%
Return 1Y+56.1%+245.4%
Since June 26, 2026−14.5%−13.0%
P/E47.555.9
P/S4.814.6
P/B4.182.2

Data as of 2026-10-09 · updates daily after U.S. close

Since June 26, 2026: the change in the closing price, from the daily closes Sectivia records itself since that date.

The two companies

ON SemiconductorON

NASDAQ · USA

Electric cars and factory automation are the end markets for its silicon carbide power semiconductors and image sensors.

Power semiconductors
Full ON profile →

SeagateSTX

NASDAQ · USA

No one ships more hard drives. The HAMR-based Mozaic platform lifts capacity per drive sharply as cloud and AI data pile up.

Data center storage
Full STX profile →

More ON & STX comparisons

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