SiTime (SITM) Q3 2026 earnings review
SiTime data-center sales triple, but deal costs cut reported profit
SiTime, a maker of precision timing chips, expanded its sales and operating margins after adding the Renesas timing division while AI server demand accelerated. Total revenue reached $299 million, and chief executive Rajesh Vashist said core data-center sales rose 202% from a year ago. Gross margin excluding one-offs hit 71%, though acquisition charges pushed reported net income down to $4 million.
| Sales from businesses owned a year ago | +156% by our math, if TPD hit its $85M plan |
|---|---|
| Total revenue | $298.7M +257% from a year ago; beat $285–295M plan |
| Gross margin, excluding one-offs | 70.7% up 11.9 percentage points from a year ago |
| Fourth-quarter outlook | On call not provided in the text release |
⚖️ Verdict: 🟢 Bullish
The story got better because core data-center growth sped up for a second straight quarter and gross margin excluding one-offs cleared 70% right after the acquisition closed. One caution: closing the deal drained cash to $324 million against $1.3 billion of debt, and the release did not split out the acquired division's sales as promised.
The question now is whether the conference call's fourth-quarter outlook and standalone TPD numbers confirm that underlying demand is still accelerating without customer double-ordering. Supporters see multi-quarter visibility from 12-to-18-month orders, while skeptics note those orders are cancellable and TPD supply remains tied to Renesas factories. The fourth-quarter revenue and margin plan on today's call will test both views.
🐂 Bull Case
AI Data-Center Demand Accelerated Again
SiTime's Communications, Enterprise and Data Center segment (CED) sells precision timing chips that synchronise data in artificial intelligence servers. While the segment's large share of sales leaves the company exposed if cloud builders pause their spending, the quarter's numbers advanced the growth case. Chief executive Rajesh Vashist said that "core CED revenue grew 202% year over year as the AI infrastructure buildout continued to drive demand for differentiated timing".
That 202% gain accelerated from 181% in the second quarter and 158% in the first. By our math, core CED sales reached about $129 million, up from $101.2 million last quarter. Total revenue reached $298.7 million, beating the $285 million to $295 million plan. If the newly acquired division met its $85 million forecast, sales from businesses SiTime owned a year ago grew 156% by our math, up from 127% last quarter.
What to watch: Fourth-quarter CED outlook on the conference call. Another quarter of triple-digit growth would show that upgrades to faster networking equipment are still lifting chip orders across data-center customers.
Operating Leverage Lifted Margins Past 70%
SiTime set a long-term gross margin target of 60% to 65% excluding one-offs, and expected the newly acquired Timing Products Division (TPD, the timing chip business bought from Renesas) to lift combined gross margin to about 68% this quarter. Both high-priced AI server chips and the 70%-margin TPD catalogue pushed profitability past those targets in the first quarter after the deal closed.
- Gross margin, excluding one-offs: 70.7%, up 11.9 percentage points from a year ago and 2.7 points above the middle of the outlook range
- Research and development, excluding one-offs: 16.3% of revenue, down 5.9 percentage points from a year ago
- Selling and administrative costs, excluding one-offs: 11.0% of revenue, down 7.1 percentage points from a year ago
- Operating margin, excluding one-offs: 43.4%, up 24.9 percentage points from a year ago
Because revenue more than tripled while combined operating expenses stayed inside management's $80 million to $85 million plan at $81.6 million, operating income excluding one-offs reached $129.5 million. By our math, that beat the $109 million to $121 million range implied by the third-quarter outlook.
What to watch: Fourth-quarter gross margin outlook on the call. Holding the 70% level would show that higher-margin data-center and TPD sales can offset the seasonal rise in lower-margin consumer electronics.
Positives this quarter didn't test
Several standing growth drivers received brief qualitative mention in the press release, while their specific numbers wait for the conference call or quarterly filing.
- Demand breadth beyond data centers: Vashist said "growth was broad-based, demonstrating strength well beyond any single market", and the call will show how fast industrial and automotive sales grew.
- Complete timing portfolio: Vashist noted that "TPD integration has gone exceptionally well across our teams, customers and roadmap", and cross-selling progress will be tested over coming quarters.
- Timing content per server rack: not quantified in the release; management's commentary on 1.6-terabit optical module adoption on the call will update this driver.
- Customer order visibility: the release gave no book-to-bill ratio or order horizon; remarks on the call will show whether customers still book 12 to 18 months ahead.
- Physical and edge AI: robots, drones and automotive applications were not detailed in the release and await segment commentary on the call.
🐻 Bear Case
Acquisition Costs Cut Reported Profit and Cash
Management highlights profit excluding one-offs, which reached $130.3 million, and Vashist pointed to a new level of financial performance. Standard accounting tells a different story because closing the $1.5 billion Renesas deal brought heavy non-cash charges, transaction bills and new debt costs onto the income statement and balance sheet.
- Reported gross margin: 51.6%, down 1.9 percentage points from a year ago and down 11.4 points from last quarter
- Intangible amortisation in cost of revenue: $53.2 million, or 17.8% of revenue by our math
- Stock-based compensation and deal costs: $35.0 million in employee stock awards and $21.3 million in direct acquisition expenses
- Reported net income: $4.4 million ($0.14 per share), down from $18.2 million last quarter
- Net debt: $994.8 million by our math, with $324.4 million in cash against $1.32 billion in convertible notes
Paying out the cash for the acquisition cut interest income from $12.5 million last quarter to $1.5 million, while interest expense rose to $5.1 million. Unlike deal fees, intangible amortisation, employee stock grants and debt costs will stay on the books for years.
What to watch: Operating cash flow in the third-quarter 10-Q filing. It will show how fast cash generation can pay down the new debt load and meet the credit facility's leverage limits next year.
Release Omitted the Acquired Division's Sales
Finance chief Beth Howe told investors last quarter that SiTime would report revenue for TPD, the timing chip business acquired from Renesas on July 1, separately in the third quarter before folding it into the existing segments. For this quarter, she projected $200 million to $210 million for legacy SiTime and about $85 million for TPD.
The third-quarter earnings release printed only the combined revenue figure of $298.7 million and the 202% growth rate for core CED. Without the standalone TPD revenue number in the text, readers of the release cannot tell how much of the $8.7 million beat against the middle of the combined outlook came from legacy SiTime versus the acquired division.
What to watch: Standalone TPD revenue in the conference call remarks or the 10-Q acquisition note. Once SiTime merges the division into its existing business units next quarter, outside investors will lose the ability to separate underlying growth from acquired sales.
Risks this quarter didn't answer
Four operational and supply-chain risks from prior quarters were not addressed in the third-quarter press release and await the call or the 10-Q filing.
- Order-book cancellation risk: customers have been placing orders 12 to 18 months ahead that remain cancellable with little notice, and the 10-Q revenue footnote will update policy and backlog terms.
- Reliance on Renesas factories: TPD production and testing stay with the seller under a transition agreement for several quarters, and the call will show whether supply constraints eased.
- Distributor and single-customer concentration: top three distributors made up 66% of sales and one consumer customer made up 14.5% last quarter; the 10-Q concentration note will give third-quarter shares.
- Bosch wafer supply renewal: the MEMS wafer agreement underpinning SiTime's oscillators expires around March 2027, and a signed renewal would remove this overhang.
👓 Other Themes
Three-for-One Stock Split and Hiring Grants
SiTime announced a three-for-one forward stock split to "make stock ownership more accessible to employees and investors", with split-adjusted trading starting on December 7, 2026. Separately, the board granted 47,976 restricted stock units to 71 new hires on November 2, following the 109,689 units granted to 168 hires in August as the US chipmaker expands its workforce after the Renesas deal.
💲 Other KPIs
Accounts receivable — money customers owe for billed shipments — rose 128.7% from last quarter, outpacing the 89.7% sequential jump in revenue. Since the end of December 2025, receivables have more than quadrupled from $45.0 million as the company took on TPD billings and shipped more products late in the quarter.
Stockpiles of raw materials and finished chips grew 7.2% from last quarter, slower than the 14.0% increase in the second quarter and the 11.7% rise in the first. The third-quarter balance includes $3.0 million of accounting step-up amortisation from the acquired TPD inventory.
The diluted share count used for profit excluding one-offs rose 20.5% from a year ago and 15.7% from last quarter. The increase reflects roughly 3.6 million shares issued to Renesas on July 1 to help pay for TPD, alongside ongoing employee stock awards.
❓ Key Questions
What is the fourth-quarter outlook for revenue and margins?
SiTime provides its quarterly numbers on the conference call rather than in the text of the release. The fourth-quarter plan will show whether the 70.7% gross margin excluding one-offs and the $300 million quarterly revenue pace can hold into year-end.
How much revenue did the acquired TPD business generate?
Management previously guided TPD to about $85 million for the third quarter and promised to report it separately once before merging the segments. Without that figure, investors cannot verify the exact growth rate of the legacy SiTime business.
Did the book-to-bill ratio stay above 1.0 this quarter?
Customers were booking orders 12 to 18 months in advance last quarter, which supporters view as multi-quarter visibility and skeptics view as double-ordering risk. An updated bookings reading will show whether data-center order momentum is still building.
Have supply limits at Renesas factories eased under the transition deal?
TPD relies on Renesas for manufacturing and testing for several quarters, and management noted customer-visible supply constraints in the second quarter. Any timeline for moving production to SiTime's own partners will determine when TPD can grow faster.
Has SiTime renewed its wafer supply contract with Bosch?
The agreement for the resonator wafers inside SiTime's oscillators expires around March 2027. Chief executive Rajesh Vashist said last quarter that the renewal should be done relatively soon, and a signed deal would lock in multi-year wafer pricing.