CIEN (CIEN) insider files notice to sell 2,500 common shares under plan

Rhea-AI Filing Summary

CIEN reported a planned sale of 2,500 common shares in a Form 144 notice. The shares are to be sold through Morgan Stanley Smith Barney LLC Executive Financial Services with an aggregate market value of 546100.00, and the table lists 140854735 common shares outstanding, with the sale expected around 12/15/2025 on the NYSE.

The securities come from common stock underlying restricted stock units acquired from the issuer on 09/20/2015, when 2500 units were granted and fully paid. The filing also lists recent 10b5-1 sales for David Rothenstein, including 2,500 common shares sold on 11/17/2025 for gross proceeds of 479311.50 and another 2,500 shares sold on 10/15/2025 for 425543.00.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	546100.00	140854735	12/15/2025	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	09/20/2015	Restricted Stock Units	Issuer			2500	09/20/2015	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	11/17/2025	2500	479311.50
10b5-1 Sales for DAVID ROTHENSTEIN 7035 Ridge Road Hanover MD 21076	Common	10/15/2025	2500	425543.00

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

How many CIEN common shares are covered by this Form 144 notice?

The Form 144 notice covers 2,500 common shares of CIEN to be sold, as listed in the table under "Number of Shares or Other Units To Be Sold."

What is the aggregate market value of the CIEN shares planned for sale?

The planned sale of CIEN common shares has an aggregate market value of 546100.00, according to the Form 144 table.

When and where are the CIEN shares expected to be sold?

The approximate date of sale is listed as 12/15/2025, and the securities exchange named for the CIEN common shares is the NYSE.

What prior 10b5-1 sales by David Rothenstein are disclosed for CIEN?

The filing lists 10b5-1 sales for David Rothenstein: 2,500 CIEN common shares sold on 11/17/2025 for gross proceeds of 479311.50 and 2,500 shares sold on 10/15/2025 for 425543.00.

How were the CIEN securities being sold originally acquired?

The CIEN common shares come from restricted stock units acquired from the issuer on 09/20/2015, when 2500 securities were acquired with a payment date of 09/20/2015 and a payment nature listed as N/A.