Ciena officer proposes sale of 1,586 shares

Cumello's reported history includes a September 20, 2026 restricted-stock-unit acquisition and a June 26, 2026 10b5-1 sale.

Rhea-AI Filing Summary

Ciena Corporation officer Joseph Cumello reported a proposed sale of 1,586 common shares, with an aggregate market value of $568,469.98 and an approximate sale date of September 25, 2026. The reported activity also includes 1,586 common shares acquired from the issuer through restricted stock units on September 20, 2026, and 1,586 shares sold on June 26, 2026 for gross proceeds of $739,599.38 under the 10b5-1 Sales heading.

Key Figures

Proposed sale: 1,586 common shares Aggregate market value: $568,469.98 Shares acquired through restricted stock units: 1,586 common shares +2 more

5 metrics

Proposed sale 1,586 common shares Approximate sale date September 25, 2026

Aggregate market value $568,469.98 Proposed sale of 1,586 common shares

Shares acquired through restricted stock units 1,586 common shares Acquired from the issuer on September 20, 2026

Shares sold during the prior three months 1,586 common shares Sale date June 26, 2026; listed under 10b5-1 Sales

Gross proceeds $739,599.38 Sale of 1,586 common shares on June 26, 2026

Key Terms

Rule 144, Restricted Stock Units, 10b5-1 Sales, Aggregate market value

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Units financial

"09/20/2026 | Restricted Stock Units | Issuer"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

10b5-1 Sales regulatory

"10b5-1 Sales for JOSEPH CUMELLO"

10b5-1 sales are pre-arranged stock-trading plans that let company insiders automatically buy or sell shares according to a fixed schedule or formula, even if they later learn confidential information. Think of it as setting up an automatic thermostat for trades: it creates a clear, documented path that can protect insiders from insider-trading accusations and gives investors a signal about predictable insider activity—though it can also simply be a way for insiders to diversify or raise cash.

Aggregate market value financial

"568469.98"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

FAQ

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

How many CIEN shares is Joseph Cumello reporting for sale?

Joseph Cumello, identified as a Ciena Corporation officer, reported a proposed sale of 1,586 common shares with an aggregate market value of $568,469.98 and an approximate sale date of September 25, 2026.

What prior CIEN share sales does Joseph Cumello report?

The reported sales include 1,586 common shares sold on June 26, 2026 for gross proceeds of $739,599.38, under the 10b5-1 Sales heading for sales during the prior three months.

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

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Available on EDGAR 09/25/2026 - 04:41 PM Accepted by SEC EDGAR 09/25/2026 - 04:17 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	0001963638
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	8150 Maple Lawn Blvd, Suite 300, Fulton MARYLAND 20759
Phone	4106945700
Name of Person for Whose Account the Securities are To Be Sold	JOSEPH CUMELLO
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	1586	568469.98	141808525	09/25/2026	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	09/20/2026	Restricted Stock Units	Issuer			1586	09/20/2026	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 8150 Maple Lawn Blvd, Suite 300, Fulton MD 20759	Common	06/26/2026	1586	739599.38

144: Remarks and Signature

Remarks
Date of Notice	09/25/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	10/13/2025
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/ Joseph Cumello
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)