Earnings Highlights: MACOM (MTSI) | FY26 Q2

1. Summary | MACOM Sharply Raises Data Center Guidance as Twin Optical and RF Engines Drive Record Results

On booming demand across all end markets, MACOM's Q2 revenue reached a record $289M (YoY +22%), and book-to-bill surged to a record 1.5. Management boldly raised FY26 Data Center revenue growth guidance from the original 35%-40% to >60%. Its future "three growth arrows" are clearly focused on: high-speed optical build-outs in the data center (1.6T/800G, 200G PDs and CW Laser), the Advanced GaN upgrade cycle in defense radar and electronic warfare, and volume production of LEO satellite communication modules.

2. Financials (Non-GAAP)

• Revenue: $289.0M (QoQ +6.4%, YoY +22.0%).

• Margins:

  • Gross margin: 58.5% (QoQ +90 bps), with higher fab utilization driving margin expansion.

  • Operating margin: 27.8% (up QoQ, with record operating income of $80.5M).

• EPS: $1.09 (prior quarter $1.02).

• Balance sheet and spending:

  • Opex: $88.6M (R&D $59.1M, SG&A $29.5M).

  • CapEx: $13.2M in Q2 (FY26 full-year estimate of $55M - $65M, kept within 5% of revenue).

  • Cash: cash and short-term investments of $664.9M at quarter-end; FY26 operating cash flow expected to exceed $300M.

• Segment revenue:

  • Data Center: $98.2M (QoQ +14.5%).

  • Industrial & Defense: $120.7M (QoQ +2.5%).

  • Telecom: $70.1M (QoQ +3.0%).

3. Outlook (FY26 Q3)

• Revenue guidance: $331M - $339M (the midpoint implies a strong QoQ jump).

• Gross margin guidance: 59% - 60% (targeting the 60% threshold by year-end).

• EPS guidance: $1.31 - $1.37.

• Sources of growth:

  • Data Center: expected QoQ +35%, the core source of explosive growth.

  • Industrial & Defense: expected QoQ close to +10%.

  • Telecom: expected QoQ growth in the low single digits.

4. Product Developments

• Data Center (optical communications / AI infrastructure):

  • Optical module components: 1.6T/800G PAM4 products are ramping in volume. Single-lane 200G PDs are in strong demand thanks to industry-leading low dark current and an integrated micro-lens design.

  • Silicon photonics light source: the 75mW-class CW Laser already delivers excellent optical performance; the team is now focused on optimizing process and reliability, with volume contribution expected in FY27-FY28.

  • Coherent Light: targeting 128G/192G baud rates, actively pushing power-efficient interconnect for short-reach data center links and DCI.

  • Copper connectivity: Linear Equalizer products are moving into 1.6T/800G applications (such as LPO, NPO and even PCIe), extending the reach limits of copper.

  • Legacy products: competitors shifting capacity has let MACOM win extra share in the 100G legacy DFB laser market.

• Industrial & Defense (radar / electronic warfare):

  • Advanced GaN: developing high-frequency, high-power MMICs for new drone and electronic warfare platforms that require high integration.

• Telecom (5G / LEO satellites):

  • 5G base stations: launching Gen4 GaN products with better linearity and cost structure, ready to take share in the 2.7-3.5GHz bands.

  • SatCom: 40nm GaN licensed from HRL is being brought into E-band, W-band and other high-frequency bands. Satellite electronics modules are in low-rate initial production (LRIP), expected to move to full-rate production between year-end and CY27.

5. Longer-Term Outlook

• Long-term trend: AI architectures are evolving from scale-up and scale-out to scale-across, with bandwidth and power-efficiency requirements growing exponentially. MACOM's strategy isn't to bet on a single technology, but to supply the underlying chips across CPO, LPO and traditional pluggable modules.

• Capacity plans and LTA strategy:

  • A £45 million strategic investment in UK epitaxy house IQE (for an 11% stake), together with a long-term supply agreement (LTA), firmly secures upstream strategic supply of InP (indium phosphide) and SiC (silicon carbide) wafers.

  • No greenfield fabs; capacity comes from upgrading existing equipment. The North Carolina fab is expected to complete a 30% capacity expansion by year-end; the Lowell, Massachusetts fab is expanding Advanced GaN and InP lines.

• Impact of mix shift on margins: the share of high-margin Data Center revenue is expanding rapidly, and utilization at the Lowell fab is recovering (helped by high-margin I&D orders such as high-voltage diodes), so significant operating leverage is expected over the next two quarters.

6. Q&A Highlights

• Key question: what's behind Data Center's explosive Q3 growth (+35% QoQ)?

  • Management: not a single customer, but broad 1.6T deployment. Plus a complete product matrix spanning 200G PDs, Coherent Light for DCI and Linear Equalizers for LPO, while demand for legacy 100G products is still holding up.

• Key question: CW Laser commercialization timeline and progress?

  • Management: optical performance is on target; the current focus is improving reliability. Qualification by module makers and hyperscalers takes time, so it is not included in the FY26 model, with the main contribution in FY27/FY28.

• Key question: can fab capacity absorb orders at a 1.5 book-to-bill?

  • Management signaled: keeping CapEx within 5% of revenue is sufficient. The company is targeting $2B in revenue and can get there entirely by debottlenecking existing sites, without heavy capital spending on new fabs.

• Key question: strategic shift in the LEO satellite terminal market?

  • Management: MACOM will not enter highly integrated terminal SoCs or receivers; rather, customers are actively seeking MACOM's GaAs diode-based control components to optimize antenna performance — an opportunistic, high-margin entry.

7. Risks and Watch Points

• CW Laser qualification delay risk: competition in silicon photonics light sources is intense; if reliability qualification slips, MACOM could miss the window to expand share in FY27.

• Weak telecom recovery: the global 5G RAN market is expected to show zero growth in 2026, so Telecom segment growth depends heavily on share gains and offsetting contributions from LEO satellites.

• Inventory and double-ordering risk: a 1.5 book-to-bill looks great in a boom, but it's worth watching closely whether module makers start double booking as they scramble amid shortages.

8. Bottom Line

• In one sentence: MACOM is in the sweet spot of the main up-leg of a twin boom in AI infrastructure and high-frequency communications.

• Core moat: top-tier materials and IC co-design expertise spanning RF, microwave, mmWave and optics (InP/GaAs/GaN), plus vertically integrated in-house fabs in the US and Europe — a strong fit with defense de-sinicization and AI supply chain security trends.

• Takeaway: a multi-engine growth profile across Data Center, Defense and SatCom, with profit growing far faster than revenue. Over a medium-term horizon (6-8 quarters), as the IQE supply tie-up and 1.6T penetration rise, the revenue base will step up substantially, and there's still significant room for upward revisions to the valuation.