CIEN (NYSE: CIEN) affiliate files to sell 2,500 shares; prior 10b5-1 trades listed

Rhea-AI Filing Summary

CIEN: Form 144 notice reporting a proposed sale of 2,500 shares of Common Stock tied to Restricted Stock Units.

The filing lists Morgan Stanley Smith Barney LLC as the broker and identifies David Rothenstein as the seller; it also records prior 10b5-1 sales of 2,500 shares on 02/17/2026 for $750,498 and 2,500 shares on 01/09/2026 for $548,200.

Insights

Securities Compliance Analyst

Routine affiliate resale notice with recorded prior 10b5-1 transactions.

The filing is a regulatory notice concerning the proposed sale of 2,500 Common shares linked to Restricted Stock Units, with Morgan Stanley Smith Barney LLC listed as the broker. The seller is named as David Rothenstein.

Cash amounts from recent 10b5-1 sales are shown as $750,498 on 02/17/2026 and $548,200 on 01/09/2026. Timing and final proceeds treatment for the new sale are not detailed in the excerpt.

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	843450.00	141398427	03/16/2026	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	06/20/2020	Restricted Stock Units	Issuer			2500	06/20/2020	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	02/17/2026	2500	750498.00
10b5-1 Sales for DAVID ROTHENSTEIN 7035 Ridge Road Hanover MD 21076	Common	01/09/2026	2500	548200.00

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

What does the CIEN Form 144 disclose?

The filing discloses a proposed sale of 2,500 Common shares tied to Restricted Stock Units and names Morgan Stanley Smith Barney LLC as the broker. It identifies David Rothenstein as the selling party and records two recent 10b5-1 sales.

Who is listed as the seller in the CIEN Form 144?

The seller is identified as David Rothenstein with an address included. The broker shown is Morgan Stanley Smith Barney LLC executing the transaction on behalf of the selling party.

What prior transactions are recorded in the filing for CIEN?

The filing records two prior 10b5-1 sales: 2,500 shares sold on 02/17/2026 for $750,498 and 2,500 shares sold on 01/09/2026 for $548,200.

Does the Form 144 state how proceeds will be used?

The excerpt does not specify any use of proceeds or whether the company receives funds. The entry lists sale amounts for prior transactions but does not state proceeds treatment for the proposed sale.