SiTime Corporation (SITM) | The Buildout — AI Infrastructure

The Verdict

SiTime designs the precision timing parts that keep high-speed electronic systems synchronized — MEMS oscillators, Super TCXOs, clock ICs and resonators. As AI datacenters push optical links and accelerator clusters to higher speeds and greater density, timing budgets tighten and timing content per system rises; management says inference infrastructure needs 2 to 4 times more timing content than training infrastructure. SiTime's parts sit in optical modules, switches, accelerator cards, server boards and rack-level synchronization. With the close of the Renesas timing business in July 2026, the company also sells clocks and buffers, which widens what it can place into each of those sockets.

Earnings Beat

SiTime reported Q2 2026 revenue of $157M, up 127% year over year and 39% sequentially. Gross margin was 63.0% on a GAAP basis and 67.1% on the non-GAAP basis management quotes, ahead of the ~65% ±1 point guide, with non-GAAP operating margin at 34% against 10% a year earlier. The standout was the datacenter segment: CED revenue was $101M, up 181% year over year, the ninth consecutive quarter of triple-digit growth.

Management tone: Management's language escalated between the Q1 2026 and Q2 2026 calls. In Q1 the CEO described the company as coming to a 'tipping point' and cited 'promises made, promises kept' on reaching the gross-margin target early. In Q2 he called the quarter 'truly exceptional' and the period 'clearly an inflection point,' and the company initiated a combined Q3 guide far above Q2 revenue. Management also volunteered negatives rather than waiting to be asked: the interest-income cliff, the heavier consumer mix in the second half, carve-out complexity, and supply constraints in the acquired business. It conceded 'credible suppliers even at the 1.6T level.'

Management Guidance

For Q3 2026, management guided combined revenue of $285–295M — SiTime excluding TPD of $200–210M, up 30% sequentially at the midpoint, and TPD of roughly $85M — with gross margin of ~68% ±1 point, operating expenses of $80–85M, interest income of ~$4M, a share count of ~32.8M including ~3.6M shares issued in conjunction with the acquisition, and non-GAAP EPS of $3.50–$3.65. The FY2026 revenue growth guide of 'at least 80%' was set in Q1 on a SiTime-ex-TPD basis and was not restated on the Q2 call. Management put a floor under coming quarters at 'above the 65% threshold… probably in the range of the 67, 68,' described 2027 as a year of 'significant growth' with 'no signs of slowdown,' and restated a multiyear growth rate of '30% maybe a little bit higher.'

Trajectory

Revenue went from $83.6M in Q3 2025 to $113.3M in Q4 2025, held near flat at $113.6M in Q1 2026, then stepped to $157.4M in Q2 2026. Gross margin on the facts-block basis rose across those same four quarters — 53.5%, 56.4%, 59.0%, 63.0% — which management attributes to a richer product mix and better manufacturing absorption on higher revenue. EBITDA on the same basis was -$6.1M, $16.2M, $7.7M and $21.2M; the Q1 2026 dip came against roughly flat revenue. One measured drag sits directly ahead: interest income steps from $12.2M in Q2 2026 to ~$4M guided for Q3, because the convertible proceeds were used to fund the acquisition.

The Model

The model's locked projections put FY+1 revenue at $888M with EBITDA of $231M (26.0%), rising to FY+2 revenue of $1,450M and EBITDA of $463M (31.9%). The near-term figure is anchored by the Q3 2026 guide of $285–295M and by the 12-to-18-month order visibility management describes; the FY+2 step-up depends on the 1.6T optical ramp and the integrated-timing roadmap. Dispersion across the five model runs is wide — the FY+2 revenue spread is 34%, with a minimum of $1,200M, a median of $1,450M and a maximum of $1,700M.

Projections are the median of 5 independent model runs. The model’s revenue sits 69.0% above analyst consensus.

For Q3 2026, management guided combined revenue of $285–295M — SiTime excluding TPD of $200–210M, up 30% sequentially at the midpoint, and TPD of roughly $85M — with gross margin of ~68% ±1 point, operating expenses of $80–85M, interest income of ~$4M, a share count of ~32.8M including ~3.6M shares issued in conjunction with the acquisition, and non-GAAP EPS of $3.50–$3.65. The FY2026 revenue growth guide of 'at least 80%' was set in Q1 on a SiTime-ex-TPD basis and was not restated on the Q2 call. Management put a floor under coming quarters at 'above the 65% threshold… probably in the range of the 67, 68,' described 2027 as a year of 'significant growth' with 'no signs of slowdown,' and restated a multiyear growth rate of '30% maybe a little bit higher.'

What Could Go Right — and Wrong

Looking Ahead

The next twelve months turn on three things the source material names. First, whether the Q3 2026 guide of $285–295M is delivered and the acquired business's first partial quarter lands. Second, whether the Bosch MEMS agreement is renewed — management said it should be done 'relatively soon' — since it is the company's only disclosed long-term supply agreement. Third, whether the 1.6T optical ramp arrives in 2027 as management expects, with 1.6T revenue doubling against a combined $450M SAM for 800G and 1.6T. Management also points to a multiyear growth rate of '30% maybe a little bit higher' and to a chiplet, advanced-substrate and module roadmap it says expands SAM by $2.5 billion by 2030 — an item with no named customer, partner or date.

Financials

Annual Summary

Key Ratios (Trailing)

The Company

SiTime is a fabless provider of precision timing solutions — oscillators, clock ICs, resonators and synchronization software — sold into electronics systems where timing accuracy, resilience and reliability are design-critical. The 10-K describes its products as 'the heartbeat of our customers' electronic systems.' Its parts sit where AI work happens: optical modules, datacenter switches, accelerator cards, server boards, retimers and active electrical cables, plus rack-level synchronization across compute and networking nodes. Management says inference infrastructure built on newer accelerators needs 2 to 4 times more timing content per system than training infrastructure, and that synchronization adds several hundred dollars of content per datacenter rack.

The company does not own manufacturing. It buys MEMS wafers and analog mixed-signal ICs from Robert Bosch in Germany, TSMC and UMC in Taiwan, and Teledyne Digital Imaging in Canada, and contracts packaging, assembly and test to ASE, Carsem, UTAC, Hana Semiconductor, Daishinku and STATS ChipPAC across Asia. All of its own facilities are leased: a roughly 50,400 sq ft Santa Clara headquarters whose lease expires in March 2027, plus sites in Japan, Malaysia, the Netherlands, Taiwan, Finland, India and Ukraine. The FY2025 10-K profile describes three reportable segments, while the Q1 2026 10-Q states the company operates in one reportable segment; the CED, AID and MIC split is the basis management guides and narrates against.

Business Segments

Competitive Landscape

SiTime's FY2025 10-K names 13 competitors and states that many of them are 'substantially larger' with 'significantly better brand recognition and broader product offerings.' Management describes the company as having created the precision timing category and as 'the only company that is doing' oscillators, resonators and clocks, but it also concedes 'credible suppliers even at the 1.6T level' and that SiTime shares business 'with most other suppliers in quartz oscillators.' The intel file records that on the Q2 2026 call management declined to fully disaggregate share gain from market growth at 1.6T.

Supply Chain

SiTime is fabless. It buys MEMS wafers and analog mixed-signal chips from named foundries in Germany, Taiwan and Canada, and contracts packaging, assembly and test to suppliers across Asia. Bosch is the only disclosed long-term supply agreement, and no neighbor transcript names SiTime.