Form 144: Proposed sale of 2,500 CIEN shares; $412,050 value

Ciena Corporation (CIEN) received a Rule 144 notice for a proposed sale of 2,500 shares of common stock with an aggregate market value of $412,050.

Rhea-AI Filing Summary

Ciena Corporation (CIEN) received a Rule 144 notice for a proposed sale of 2,500 shares of common stock with an aggregate market value of $412,050. The filing lists Morgan Stanley Smith Barney LLC Executive Financial Services as broker, an approximate sale date of 10/15/2025, and the NYSE as the exchange. The filing shows 141,055,908 shares outstanding.

The shares to be sold were acquired via Restricted Stock Units on 03/20/2023. The document also lists recent 10b5-1 sales for David Rothenstein: 2,500 shares on 09/15/2025 for $330,000.00 and 2,500 shares on 08/15/2025 for $226,495.75.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many CIEN shares are proposed for sale under this Form 144?

The notice covers a proposed sale of 2,500 shares of common stock.

What is the aggregate market value of the proposed CIEN share sale?

The filing states an aggregate market value of $412,050.00.

When is the approximate sale date for the CIEN shares?

The approximate date of sale is 10/15/2025.

Who is the broker for the proposed CIEN share sale?

The broker is Morgan Stanley Smith Barney LLC Executive Financial Services.

On which exchange are the CIEN shares listed for this sale?

The filing names the NYSE as the securities exchange.

How were the CIEN shares being sold acquired?

They were acquired via Restricted Stock Units on 03/20/2023.

What recent sales related to this seller are disclosed?

The filing lists 10b5-1 sales for David Rothenstein: 2,500 shares on 09/15/2025 for $330,000.00 and 2,500 shares on 08/15/2025 for $226,495.75.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 10/15/2025 - 04:39 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001444157
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Ciena Corporation
SEC File Number	001-36250
Address of Issuer	7035 Ridge Road Hanover MARYLAND 21076
Phone	4106945700
Name of Person for Whose Account the Securities are To Be Sold	DAVID ROTHENSTEIN
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	2500	412050.00	141055908	10/15/2025	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	03/20/2023	Restricted Stock Units	Issuer			2500	03/20/2023	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
10b5-1 Sales for DAVID ROTHENSTEIN 7035 Ridge Road Hanover MD 21076	Common	09/15/2025	2500	330000.00
10b5-1 Sales for DAVID ROTHENSTEIN 7035 Ridge Road Hanover MD 21076	Common	08/15/2025	2500	226495.75

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock units during the period of 03/20/2023 through 06/20/2024.
Date of Notice	10/15/2025
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	12/23/2024
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ David Rothenstein
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)