Officer proposes sale of 1,773 shares as prior 10b5-1 sales listed — CIEN (CIEN)

Rhea-AI Filing Summary

Joseph Cumello reported a Form 144 proposing sale of 1,773 shares of Common Stock (Restricted Stock Units) dated 03/20/2026. The filing also lists prior 10b5-1 sales on 01/12/2026 of 11,929 Common shares for $2,741,531.61. Brokerage info on the filing shows $687,906.27 associated with the 1,773-share line and an execution date of 03/27/2026.

Insights

Securities Compliance Attorney

Form 144 discloses a proposed resale and prior 10b5-1 sales by an insider.

The filing lists a proposed sale of 1,773 Restricted Stock Units dated 03/20/2026 and records prior 10b5-1 sales of 11,929 shares on 01/12/2026 for $2,741,531.61. The broker line includes $687,906.27 and an execution date of 03/27/2026.

These disclosures are routine resale notifications under Section 144; cash‑flow treatment and any sale settlement mechanics 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	1773	687906.27	141398427	03/27/2026	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	03/20/2026	Restricted Stock Units	Issuer			1773	03/20/2026	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 JOSEPH CUMELLO 7035 Ridge Road Hanover MD 21076	Common	01/12/2026	11929	2741531.61

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 CIEN's Form 144 filed by Joseph Cumello report?

It reports a proposed sale of 1,773 Restricted Stock Units dated 03/20/2026. The filing also records prior 10b5-1 sales of 11,929 shares on 01/12/2026 for $2,741,531.61.

How many shares did the filing show sold under a 10b5-1 plan for CIEN?

The filing shows prior 10b5-1 sales of 11,929 Common shares on 01/12/2026 with total proceeds of $2,741,531.61 as stated in the excerpt.

What quantity and date are listed for the proposed resale in the Form 144?

The proposed resale line lists 1,773 shares (Restricted Stock Units) with a transaction date of 03/20/2026 and an associated execution date shown as 03/27/2026.

Does the Form 144 specify who is the broker for the proposed sale?

Yes; the excerpt names Morgan Stanley Smith Barney LLC at 1 New York Plaza as the broker on the line corresponding to the 1,773-share entry in the filing.