Ciena Corporation's Q4 2025 results reveal the scale of hyperscaler spending on AI infrastructure. The networking equipment maker logged $7.8B in orders for fiscal 2025, ending the year with $5B in backlog—$3.8B in hardware and software alone.
Optical networking revenue climbed 19% year-over-year, while routing and switching revenue jumped 49%. Ciena's 3005 series revenue doubled, driven primarily by data center optical connectivity (DCOM) demand. The company stated DCOM operations have reached "hundreds of millions of dollars in revenue scale" with "advanced pipeline discussions with additional hyperscalers" underway.
Reconfigurable Line System (RLS) revenue surged 72% as hyperscalers upgrade optical networks to handle AI training and inference workloads. Ciena's WaveLogic 6 Nano 800G pluggables generated $168M in revenue, more than double the prior year.
For fiscal 2026, Ciena projects $5.7B-$6.1B revenue, representing 24% growth at midpoint versus prior 17% guidance. Operating margins are expected to reach 17%, up from 11.2% in fiscal 2025, as capital equipment orders convert to revenue.
Micron Technology officially broke ground on its New York megafab, with Google Cloud CEO Thomas Kurian stating the facility "will strengthen the domestic supply chain and support the innovation required to meet accelerating AI demand." The project addresses memory and storage bottlenecks in AI data centers.
Infrastructure spending extends beyond chips and networking. Data center operators are deploying liquid cooling systems to manage heat from dense GPU clusters. Mining companies like DMG Blockchain Solutions adjusted equipment operations "to focus on profitability over hashrate generation," repurposing energy-intensive infrastructure for AI compute.
Mawson Infrastructure Group adopted a stockholder rights agreement while noting it "does not preclude the Board from considering proposals" for transactions in stockholder interests, signaling potential M&A activity in the infrastructure buildout sector.
Ciena allocated $330M to stock repurchases in fiscal 2025 and plans similar buybacks in 2026, while increasing capex to $250M-$275M for 3nm chip mask sets and production capacity. The company's cash position stood at $1.4B at year-end.