Bruce L. Claflin - 24 Sep 2026 Form 4 Insider Report for CIENA CORP (CIEN)

Reporting relationship: Director
Issuer ticker: CIEN
Reported as of: 24 Sep 2026
Net transaction value: -$1,016,835
SEC form: 4
Accepted by SEC: 28 Sep 2026, 17:53:15 UTC
Prior SEC filing: 14 May 2026
Source filing: View source filing
Reporting owner signature: By: Michele Rankin For: Bruce L. Claflin

Key filing fact

Bruce L. Claflin filed Form 4 for CIENA CORP (CIEN) on 28 Sep 2026.

Key facts

This page summarizes Bruce L. Claflin's Form 4 filing for CIENA CORP (CIEN).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 28 Sep 2026, 17:53.

Change

Previous filing in this sequence was filed on 14 May 2026.
Current net transaction value: -$1,016,835.

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 0001403694 Primary reporting owner

Claflin Bruce L.

Relationship: Director
Address: C/O CIENA CORPORATION, 8150 MAPLE LAWN BOULEVARD, SUITE 300, FULTON
Signature: By: Michele Rankin For: Bruce L. Claflin
Signature date: 28 Sep 2026

Reported non-derivative transactions

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

CIEN transaction

Common Stock

Sale

Transaction value: $1,016,835
Shares: -2,857
Change %: -26%
Price: $355.91
Shares after: 8,279
Date: 24 Sep 2026
Ownership: By spousal trust
Footnotes: F1, F2

CIEN holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 50,843
Date: 24 Sep 2026
Ownership: Direct
Footnotes: F3

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

Reflects a contribution of common stock to an exchange fund in exchange for an interest in the exchange fund. The common stock was valued at $355.91 per share for the purpose of determining the size of the interest in the exchange fund to be issued

Footnote F2

The beneficiaries of the trust are the reporting person's spouse and children. The reporting person disclaims beneficial ownership of the securities held by the trust.

Footnote F3

Shares reported include unvested Restricted Stock Units (RSUs).