Ciena Corp Officer Files Form 144 to Sell 2,500 Shares Under 10b5-1 Plan

Executive Summary

On October 15, 2026, David Rothenstein, an Officer at Ciena Corporation (CIEN), filed a Form 144 notice of proposed sale covering 2,500 shares of common stock with an aggregate market value of $899,000.00. The proposed sale is executed via Morgan Stanley Smith Barney LLC pursuant to a pre-arranged Rule 10b5-1 trading plan adopted on October 10, 2025.

Transaction Details

• Filer: David Rothenstein (Officer)
• Shares Proposed for Sale: 2,500
• Estimated Aggregate Market Value: $899,000.00 (~$359.60 per share)
• Shares Outstanding: 141,808,525 (~0.0018% of outstanding shares)
• Broker: Morgan Stanley Smith Barney LLC Executive Financial Services
• Approximate Sale Date: October 15, 2026
• Origin of Securities: Vesting of Restricted Stock Units (RSUs) acquired from the issuer between September 20, 2021, and March 20, 2024.

Prior 3-Month Activity

The filer previously executed scheduled sales under the same 10b5-1 plan:

• September 15, 2026: 2,500 shares for gross proceeds of $826,208.25
• August 14, 2026: 2,500 shares for gross proceeds of $1,095,250.00

Trading Significance

This filing represents a routine, programmed transaction under a Rule 10b5-1 plan established a year prior. Given the small transaction size relative to total shares outstanding (less than 0.01%) and consistent periodic execution, market impact is expected to be minimal.