Rothenstein David M 4

What Happened
David M. Rothenstein, SVP and Chief Strategy Officer at CIENA (CIEN), had a total of 2,113 shares withheld on March 20, 2026 to satisfy tax liabilities related to vested restricted stock/unit awards. The shares were recorded as dispositions at $383.89 per share, totaling approximately $811,160 across five withholding transactions (472, 174, 811, 436, and 220 shares).

Key Details

• Transaction date: 2026-03-20; filing date: 2026-03-24 (filed within two business days).
• Price per share: $383.89; total value of withheld shares: ~$811,160.
• Shares withheld by transaction: 472; 174; 811; 436; 220 (total 2,113).
• Reported as code F — shares withheld to cover tax liabilities upon vesting of RSUs/PSUs.
• Footnotes indicate withholdings relate to RSU award agreements dated 12/13/2022, 12/12/2023, 12/17/2024, and 12/16/2025; reported RSU/PSU grants were previously disclosed on Form 4 filings tied to those dates.
• Shares owned after the transaction are not specified in the provided summary of the filing.

Context
This was a tax-withholding disposition (code F), a routine administrative action when restricted stock units or performance units vest. These withholdings are not open-market sales by the insider and do not necessarily indicate a change in the insider’s view of the company.