AI Data Center Surge Fails to Resolve Value Trap Debate for Onsemi

What happened

Onsemi posted its fourth consecutive earnings beat in Q3 2026, yet the stock remains nearly 48% below its 52-week high, reflecting persistent investor skepticism. The standout was a reported 175% year-over-year surge in AI data center sales, a segment management has been cultivating as a growth driver. However, core automotive and industrial revenues are still recovering from a cyclical trough, and non-GAAP gross margin hovers around 38%, far from the 45-53% levels targeted for 2027. The DeepValue master report had rated ON a WAIT, citing a rich ~77x trailing P/E and execution risks from a structural manufacturing reset. This AI momentum is promising but from a small base, leaving analysts divided on whether the stock is a bargain or a value trap.

Implication

The 175% AI data center growth, if sustained, could eventually provide a new growth pillar and diversify ON away from depressed auto/industrial markets. However, the current valuation already prices in a significant recovery, and the core business has yet to show consistent margin expansion. The stock's 48% discount to its 52-week high suggests the market remains skeptical about the durability of the AI ramp and the broader cyclical turnaround. Until gross margin moves into the low-40s and AI revenue becomes material enough to offset auto weakness, the stock likely deserves a wait-and-see approach. Investors should focus on management's guidance for AI data center revenue trajectory and evidence of conversion of the $11.9B LTSA backlog in the coming quarters.

Thesis delta

The prior thesis was a WAIT, with the market pricing a clean auto/SiC recovery and heavy buybacks but offering limited margin of safety. The new information on 175% AI data center growth adds a potential high-growth segment that could accelerate the recovery, but its contribution remains small and does not yet justify a higher rating. Therefore, the thesis remains largely unchanged, though the AI traction slightly increases the probability of the bull case if it scales.