Ciena Officer Dino DiPerna Files Form 144 to Sell 890 Shares Under 10b5-1 Plan

Executive Summary

On October 15, 2026, Dino DiPerna, an Officer at CIENA CORP ($CIEN), filed a Form 144 notice proposing the sale of 890 shares of common stock through Morgan Stanley Smith Barney LLC. The aggregate market value of the proposed transaction is $308,865.60, reflecting an estimated price of $347.04 per share.

Transaction & Plan Details

• Security: Common Stock
• Shares Proposed for Sale: 890
• Aggregate Market Value: $308,865.60
• Acquisition Origin: Acquired as restricted stock from the issuer on September 20, 2026.
• Rule 10b5-1 Trading Plan: The transaction is governed by a pre-established trading plan adopted on June 10, 2026.
• Past 3 Months Activity: The filer reported two prior sales:
  • September 16, 2026: 249 shares sold for $87,150.00
  • September 15, 2026: 249 shares sold for $80,890.14

Market Impact & Significance

The trading significance is rated as Low. The 890 shares represent a negligible fraction of CIENA CORP's approximately 141.8 million shares outstanding. Furthermore, the sale is being conducted pursuant to a Rule 10b5-1 plan adopted months earlier, indicating routine portfolio diversification rather than discretionary selling based on near-term business developments.