Marc D. Graff - 14 Aug 2026 Form 4 Insider Report for CIENA CORP (CIEN)

Reporting relationship: SVP & Chief Financial Officer
Issuer ticker: CIEN
Reported as of: 14 Aug 2026
Net transaction value: -$2,151,435
SEC form: 4
Accepted by SEC: 18 Aug 2026, 18:30:13 UTC
Prior SEC filing: 04 Aug 2026
Source filing: View source filing
Reporting owner signature: By: Michelle Rankin For: Marc D. Graff

Key filing fact

Marc D. Graff filed Form 4 for CIENA CORP (CIEN) on 18 Aug 2026.

Key facts

This page summarizes Marc D. Graff's Form 4 filing for CIENA CORP (CIEN).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 18 Aug 2026, 18:30.

Change

Previous filing in this sequence was filed on 04 Aug 2026.
Current net transaction value: -$2,151,435.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002080157 Primary reporting owner

Graff Marc D.

Relationship: SVP & Chief Financial Officer
Address: C/O CIENA CORPORATION, 8150 MAPLE LAWN BOULEVARD, SUITE 300, FULTON
Signature: By: Michelle Rankin For: Marc D. Graff
Signature date: 17 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

CIEN transaction

Common Stock

Sale

Transaction value: $2,151,435
Shares: -4,995
Change %: -4.4%
Price: $430.72
Shares after: 107,519
Date: 14 Aug 2026
Ownership: Direct
Footnotes: F1, F2, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 3 footnotes

Footnote F1

Sales were affected pursuant to Rule 10b5-1 trading plan dated 08/14/2026.

Footnote F2

Reflects the weighted average sales price with transactions in a range of sales from $423.3500 to $443.4100. Upon request by the SEC, full information regarding the number of shares sold at each separate sales price will be provided.

Footnote F3

Shares reported include unvested Restricted Stock Units (RSUs)