Ciena beat Q1 earnings expectations but saw stock drop 14% on March 5, 2026, due to profit-taking, cautious guidance, and insider selling despite strong AI-driven demand and a record backlog.

Ciena reported strong fiscal Q1 2026 results, with revenue rising 33.1% to $1.43 billion and adjusted EPS surging to $1.35, both exceeding expectations. The company raised its full-year 2026 revenue guidance to $5.9–6.3 billion and boosted its gross margin outlook to 44% at the midpoint, citing robust demand from AI-driven data centers and a record $7 billion backlog. Despite the positive outlook and a new high-density optical engine launch, Ciena’s stock dropped 14% on March 5, 2026, due to profit-taking after a 47% year-to-date rally, a conservative growth outlook relative to high expectations, and insider selling by CEO Gary Smith.