Shares of Onto Innovation tumbled 9.6% to $314.53 on Tuesday, erasing most of the gains from a sharp multi-day run-up that peaked at $347.87 on June 22. The drop landed on a brutal day for the sector: a global selloff in chipmaker shares dragged U.S. indexes lower amid doubts about the sustainability of the AI-fueled tech rally.
Fears of a possible Fed rate hike later this year, driven by accelerating inflation tied to the Iran conflict, added to the pressure. For Onto shareholders, the question is whether the pullback is just a breather or a sign the stock got ahead of itself.
An Aggressive Analyst Call Lit the Fuse — Then Gravity Hit. Oppenheimer raised its price target on Onto to $450 from $370 on Monday while maintaining an Outperform rating.
The firm boosted 2027 revenue and earnings estimates by 8%, citing stronger chip-equipment spending signals and rising confidence in Onto's newest inspection platform for AI chips. That call pushed shares up over 4% on June 22 alone. But with the Nasdaq 100 plunging as much as 3.4% on Tuesday and the VanEck Semiconductor ETF dropping 6.5% , even a strong company-specific story could not outrun the market tide.
The Valuation Is Rich, and Investors Know It. Onto trades at roughly 48.5 times next year's expected earnings, with a $17.3 billion market cap on just $1.03 billion in trailing revenue.
At 16.2 times price-to-sales versus a U.S. semiconductor industry average of 8.8 times , that premium leaves little room for disappointment. When a stock rallies ~38% in three weeks — from $254 in mid-May to $348 — even believers are tempted to lock in profits.
The Underlying Business Momentum Is Real. Onto reported Q1 2026 revenue of $291.9 million, beating expectations, with sales up 9.5% year-over-year.
Management projects 2026 revenue above $1.3 billion with more than 30% annual growth and operating margins above 30% by year-end.
The company recently priced a $1.3 billion zero-coupon convertible debt offering due 2031 , giving it a war chest for its $710 million Rigaku partnership — a deal to combine its inspection tools with Rigaku's AI-driven X-ray technology.
A Brutal Macro Backdrop Could Keep Pressure On. Worries about the sustainability of tech surges, combined with fears that rising inflation could force higher interest rates and more expensive borrowing for AI infrastructure buildout , make high-multiple names like Onto especially vulnerable. Oppenheimer notes Onto still trades at a discount to peers like KLA at 48 times 2027 earnings , but that argument only holds if the growth materializes. Investors should watch Q2 results closely: anything short of another beat-and-raise will test whether conviction or valuation anxiety wins.