Shares of SiTime Corporation surged past $714 in pre-market trading Thursday, a 31.6% leap after the precision-timing chipmaker delivered a quarter that blindsided even its most optimistic backers — and raised the immediate question of whether this niche semiconductor firm can hold its place in the AI infrastructure buildout. SiTime Doubles Revenue and Nearly Doubles Its Stock Price in a Day — But at $715, How Much AI Growth Is Already Priced In?
Shares of SiTime rocketed 31.6% to $714.99 after the precision-timing chipmaker — which makes the tiny components that keep signals synchronized inside data centers, optical networks, and AI servers — delivered a quarter that crushed expectations on every metric and issued guidance that left analysts scrambling to revise models.
• Revenue More Than Doubled, Powered by AI Data Centers
Revenue hit $157.4 million, up 127% year-over-year and 39% sequentially.
The data center and communications segment crossed $100 million in quarterly revenue for the first time, surging 181% year-over-year , fueled by the industry transition to faster optical modules, where SiTime commands higher prices per chip, and growing demand for synchronization components in AI server racks. This isn't a company riding a broad chip recovery — it's capturing new dollars as AI infrastructure scales.
• Margins Are Expanding Fast as Revenue Grows
Gross margin widened to 67.1%, up 8.9 percentage points from a year ago, while non-GAAP operating margin surged to 34% from just 10%.
Costs grew far slower than revenue — cost of goods rose roughly 74% while operating expenses climbed about 50% — meaning each new dollar of sales drops more profit to the bottom line. Non-GAAP earnings per share reached $2.34.
• Q3 Guidance Blew Past Consensus by a Mile
Management guided Q3 revenue to $285–$295 million at roughly 68% gross margin, with EPS of $3.50–$3.65 — nearly double the Street's prior EPS consensus of $1.90. That jump partly reflects the July 1 closing of SiTime's $1.35 billion acquisition of Renesas's timing business , which brings over 10,000 customers and a 70% gross-margin profile.
The combined Q3 guidance implies an annualized revenue run rate above $1.2 billion.
• The Acquisition Changes the Math — and the Risk
The acquired business has outperformed management's own expectations during due diligence , but it was funded with zero-coupon convertible debt , adding roughly 3.6 million dilutive shares and balance-sheet leverage. All eight covering analysts carry buy ratings, with a mean target of $837.50 — suggesting the Street sees further upside even after today's surge. The open question: with the stock now pricing in a billion-dollar-revenue company growing at triple digits, any stumble in AI spending or integration hiccups could mean a painful reversal.