Ciena (CIEN) Stock Soars on Q4 2025 Earnings Beat, AI Demand and Bullish 2026 Guidance
Ciena Corporation (NYSE: CIEN) jumped sharply on Thursday, December 11, 2025, after posting a strong fiscal fourth‑quarter 2025 earnings report and issuing revenue guidance for 2026 that came in well ahead of Wall Street expectations. The move caps a remarkable year in which the optical‑networking specialist has ridden the wave of artificial intelligence (AI) and cloud infrastructure spending to triple‑digit stock gains. Barron’s+2Investors+2 As of early afternoon trading, Ciena shares were changing hands around $222 per share, up solidly on the day and near record territory. The stock is now up roughly 160%–165% in 2025, following an already strong run