Lumentum Conference Call Summary Company Overview - Lumentum is primarily an infrastructure provider focused on data centers, offering semiconductor components and systems to hyperscalers and data center operators [5][6][10] Core Business Segments - **Lasers and Transceivers**: Lumentum specializes in two main types of lasers used in data centers: Continuous Wave (CW) lasers and Externally Modulated Lasers (EMLs). The company predominantly manufactures EMLs, holding approximately 50% to 60% of the global EML market [9][10] - **Emerging Technologies**: The company is also exploring ultra-high power lasers for scale-up and scale-out applications within data centers [10] Market Dynamics - **Demand vs. Supply**: Lumentum is currently facing a supply-demand imbalance, estimating to be 30% behind demand by mid-2026 despite plans to increase capacity by 40% [18][19] - **Capacity Expansion**: The company is virtualizing its indium phosphide fabs to optimize production and meet increasing demand [20][21] Product Development and Trends - **200 Gig EMLs**: The company anticipates that 200 gig EMLs will constitute 10% of volumes in Q1 2026, increasing to 25% by Q4 2026, which will positively impact revenue and margins [22][25] - **Optical Circuit Switches (OCS)**: Lumentum sees significant growth potential in the OCS market, with expectations to grow from $10 million in Q1 to $100 million by Q4 2026 [38][40] Competitive Landscape - **Vertical Integration Risks**: While competitors are exploring vertical integration, Lumentum has opted to focus on components rather than integrated modules, which may mitigate risks associated with competition [16][17] - **Co-Packaged Optics**: The company views co-packaged optics as a growth opportunity, with expectations for material revenue contributions starting in the latter half of 2026 [46][50] Future Outlook - **Growth Drivers**: Lumentum anticipates strong contributions from OCS, scale-out, and scale-up optics in 2026, which are not yet reflected in current financial projections [64][65] - **Market Position**: The company believes its core business, particularly in EMLs and emerging technologies, positions it well for future growth, with optimism about the optics market resurgence [63][66] Key Takeaways - Lumentum is strategically positioned in the data center infrastructure market, focusing on lasers and transceivers, with a strong emphasis on EMLs - The company is addressing supply chain challenges while expanding capacity to meet growing demand - Future growth is expected from new product developments and market opportunities, particularly in OCS and co-packaged optics, indicating a positive outlook for the company in the coming years [64][65]

Q4 FY25 Performance - Revenue reached $480.7 million[9,10,11,13], a 16% increase QoQ[8] and a 67% increase YoY[8] - Non-GAAP gross margin was 37.8%[10], compared to 35.2% in Q3 FY25[10] and 27.8% in Q4 FY24[10] - Non-GAAP operating income was $72.3 million[10], resulting in a 15.0% operating margin[10] - Non-GAAP diluted EPS was $0.88[10], compared to $0.57 in Q3 FY25[10] and $(0.13) in Q4 FY24[10] Segment Performance - Cloud & Networking revenue was $424.1 million[11] - Industrial Tech revenue was $56.6 million[11] Key Growth Drivers - Strong cloud demand, particularly from hyperscale customers, drove revenue growth[8] - Cloud module shipments exceeded the 50% QoQ growth target[8] - EML business approximately doubled compared to Q4 FY24[8] Q1 FY26 Guidance (Non-GAAP) - Revenue is projected to be between $510 million and $540 million[13] - Operating margin is expected to be between 16.0% and 17.5%[13] - Diluted EPS is projected to be between $0.95 and $1.10[13]