RMBS earnings call summary

Prepared Highlights

• Product revenue of $88 million in Q1, up 15% year-over-year, driven by DDR5 RCD chips (CEO, CFO).
• Total revenue of $180.2 million in Q1, in line with guidance (CFO).
• Royalty revenue of $69.6 million; licensing billings of $70.8 million in Q1 (CFO).
• Contract and other revenue of $22.6 million, predominantly silicon IP (CFO).
• Non-GAAP net income of $69.3 million in Q1 (CFO).
• Operating cash flow of $83 million; free cash flow of $66.3 million in Q1 (CFO).
• CapEx of $17 million in Q1; depreciation of $8.5 million (CFO).
• Cash, cash equivalents and marketable securities of $786 million at quarter end, up $24 million from Q4 2025 (CFO).
• Inventory increased by $14 million in Q1; expected to continue building strategically in Q2 (CFO).
• Non-GAAP total operating costs of $104.6 million in Q1; operating expenses of $69.9 million (CFO).
• Interest and other income of $6.9 million in Q1 (CFO).
• Official guidance (Q2 2026): Revenue $192M–$198M; product revenue $95M–$101M (11% sequential increase at midpoint); royalty revenue $72M–$78M; licensing billings $76M–$82M; non-GAAP total operating costs $110M–$114M; CapEx ~$14M; non-GAAP operating profit $78M–$88M; non-GAAP EPS $0.65–$0.73 (110M diluted shares); non-GAAP tax expense $13.6M–$15.2M (CFO).
• Full-year outlook: Expect year-over-year revenue growth in 2026 (CFO).

Mgmt Quotes

• "We opened 2026 with a strong first quarter, meeting our financial targets and broadening our portfolio to address the accelerating demands of AI." (CEO)
• "As AI adoption accelerates and inference use cases expand, workloads are becoming more persistent and context-rich and performance is increasingly defined by how efficiently data can be stored, accessed, moved and secured." (CEO)
• "We delivered product revenue of $88 million in Q1, in line with our guidance and up 15% year-over-year. Looking ahead, we expect to deliver double-digit product revenue growth in the second quarter." (CEO)
• "We delivered first quarter revenue and earnings in line with our guidance with solid contributions from each of our diversified businesses." (CFO)
• "Our product business grew 15% year-over-year and is poised for sequential growth in the second quarter." (CFO)

Prepared Metrics

Q&A Batch (1-5 of 9)

Q1 — Kevin Garrigan

• Topic: June quarter product revenue recovery and LPDDR5 SOCAMM2 revenue timing
• Key points:
  • Q2 product revenue guided at 11% sequential growth over Q1; prior OSAT issue is resolved, supply chain normalizing.
  • Market transitioning from DDR5 Gen 2 to Gen 3, a positive catalyst; management expects sequential growth after Q2.
  • LPDDR5 SOCAMM2 revenue in 2026 will be “very minimal” due to small volumes and small content; it addresses a small portion of AI workloads.
• Mgmt stance: Bullish on core DDR5 trajectory; neutral/cautious on SOCAMM2 near-term financial impact (strategic stepping stone, not in 2026 model).

Q2 — Tristan Gerra

• Topic: Supply constraints, data center growth, and MRDIMM opportunity
• Key points:
  • Server market expected to grow low double-digit this year; demand continues for standard servers driven by agentic AI.
  • Back-end supply situation has not improved since last quarter; lead times remain long, and supply is expected to be tight into 2027.
  • MRDIMM ramp expected to start in earnest in 2027; SAM still valued at ~$600 million, with ramp dependent on Intel/AMD platform launches.
• Mgmt stance: Cautious on supply (tightness persisting); bullish on MRDIMM long-term opportunity but conservative on near-term attach rate.

Q3 — Aaron Rakers

• Topic: MRDIMM attach rate assumptions, CXL strategy, and second-half seasonality
• Key points:
  • MRDIMM attach rate modeled as “low” and conservative; key variables include platform timing, DRAM pricing, and customer module mix.
  • CXL: traction in IP business, but no semiconductor product launch planned; focus remains on standard DIMMs and MRDIMMs for agentic AI.
  • Second-half product revenue expected to show better growth than first half; first-half 2026 (midpoint) still growing ~18% vs. first-half 2025.
• Mgmt stance: Neutral on MRDIMM near-term (conservative attach rate); bullish on second-half growth and CXL IP traction.

Q4 — Gary Mobley

• Topic: License/contract revenue strength, silicon IP growth, and CPU-to-GPU ratio in AI servers
• Key points:
  • Silicon IP business seeing “very good traction” from AI custom solutions; expected to grow 10%–15% annually.
  • Patent licensing business stable at ~$200M–$210M annually, with quarterly variations due to agreement structures.
  • Agentic AI and inference are shifting CPU-to-GPU ratio in favor of CPUs; DDR and MRDIMMs expected to be workhorses for inference.
• Mgmt stance: Bullish on silicon IP and patent licensing fundamentals; bullish on CPU ratio shift benefiting Rambus.

Q5 — Sebastien Cyrus Naji (analyst)

• Topic: SOCAMM content, companion chip revenue progress, and bundling importance
• Key points:
  • SOCAMM content for Rambus: 3 voltage regulators and an SPD Hub; content and volumes remain minimal.
  • Companion chips (newer products) contributed low double-digit percent of total product revenue in Q1; expected similar in Q2.
  • Management expects to exit 2026 with mid-double-digit percent of product revenue from new chips; steady quarter-over-quarter growth.
  • Customers increasingly require whole chipset from one supplier due to interoperability challenges at high speeds.
• Mgmt stance: Bullish on companion chip growth trajectory and bundling strategy; neutral on SOCAMM near-term financial impact.

Q&A Batch (6-9 of 9)

Q6 — Kevin Cassidy

• Topic: Inventory build and supply tightness
• Key points:
  • No orders were left unbooked due to inventory shortages.
  • Supply tightening is observed, especially on the back end; company is building inventory to avoid missing steep customer ramps.
  • Generation 3 is ramping very fast; company wants sufficient inventory for new generations.
  • Older generation inventory may be used to serve demand, as part of normal inventory management.
• Mgmt stance: Neutral – proactive inventory build to manage supply tightening and fast generation transitions, but no current order loss.

Q7 — Bastien Faucon-Morin

• Topic: (No content provided in input)
• Key points: (No content provided in input)
• Mgmt stance: (No content provided in input)

Q8 — Luc Seraphin (response to Bastien Faucon-Morin)

• Topic: SOCAMM solution content and DDR5 generation ramp timing
• Key points:
  • SOCAMM solution includes 1 SPD Hub and 2 types of voltage regulators (one 12 amp, two 3 amps); no PMIC in this generation.
  • LPDDR6 may require more complex power management chips; company views this as a strategic stepping stone.
  • Gen 4 DDR5 starts ramping this year but is a niche generation; Gen 5 product shipments begin toward end of 2025, with bulk volume starting in 2027, dependent on Intel/AMD next-gen platform ramps.
• Mgmt stance: Bullish on long-term strategic positioning (stepping stone for LPDDR6 and future power management), cautious on near-term volume (Gen 5 bulk volume not until 2027).

Q9 — Mark Lipacis

• Topic: DIMM attach rate by CPU use case and back-end supply tightness
• Key points:
  • Highest memory capacity/bandwidth use is near GPUs/HBM platforms (e.g., DGX boxes); inference and agentic AI CPUs likely have lower attach rates, but company has not modeled this.
  • Back-end supply tightness due to two factors: (1) increased data center demand, (2) semiconductor suppliers moving back-end supply chains from China to other Asian countries, straining capacity.
  • Company exited 2025 with mid-40% market share; expects to continue gaining share in 2026, with no sign of erosion, aided by strong Gen 3 footprint and additional content.
• Mgmt stance: Bullish on market share trajectory (mid-40% share, continued gains expected), neutral on attach rate modeling (difficult to quantify), cautious on back-end supply (tightness from demand and supply chain shifts, no war impact yet).