Rothenstein David M 4

What Happened
David M. Rothenstein, SVP and Chief Strategy Officer at Ciena (CIEN), reported a sale of 2,500 shares on 2026-03-16. The shares were disposed at $345.00 each for a total transaction value of $862,500. The filing lists the transaction as an open-market/private sale (code S) and is a sale rather than a purchase.

Key Details

• Transaction date and price: 2026-03-16 at $345.00 per share (total $862,500).
• Filing date: Form 4 filed 2026-03-18 (appears timely for the 2026-03-16 transaction).
• Plan/authorization: Sale was made pursuant to a Rule 10b5-1 trading plan dated 10/10/2025 (Footnote F1).
• Share status: Filing notes reported shares include unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs) (Footnote F2).
• Transaction type: Reported as a sale (S). No indication in the provided data that this was an option exercise, gift, or tax withholding.

Context
Sales executed under a 10b5-1 plan are typically prearranged and do not necessarily reflect a change in the insider’s view of the company; they are commonly used to avoid questions about timing. The filing does not provide further detail on post-transaction holdings in the summary provided here.