Ciena officer plans $87K NYSE stock sale

Rhea-AI Filing Summary

CIENA CORPORATION (CIEN) received a notice that officer Dino DiPerna intends to sell 249 shares of common stock under Rule 144 through Morgan Stanley Smith Barney LLC, with an indicated aggregate market value of $87,150.00, with sales expected on or about September 16, 2026 on the NYSE.

The notice also lists DiPerna’s prior sales over the past three months, including 249 shares for $80,890.14 on September 15, 2026 and 782 shares for $351,235.30 on July 15, 2026.

Key Figures

Shares to be sold: 249 shares Planned aggregate market value: $87,150.00 Recent sale on September 15, 2026: 249 shares for $80,890.14 +2 more

5 metrics

Shares to be sold 249 shares Common stock to be sold by Dino DiPerna under Rule 144

Planned aggregate market value $87,150.00 Aggregate market value for 249 CIENA shares expected to be sold on September 16, 2026

Recent sale on September 15, 2026 249 shares for $80,890.14 CIENA common stock sold by Dino DiPerna during the past three months

Sale on July 15, 2026 782 shares for $351,235.30 CIENA common stock sold by Dino DiPerna during the past three months

Planned sale date September 16, 2026 Expected date for the new Rule 144 sale of 249 CIENA shares

Key Terms

Rule 144, Restricted Stock, aggregate market value

3 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 financial

"Common | 06/20/2026 | Restricted Stock | ISSUER"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

aggregate market value financial

"Common | Morgan Stanley Smith Barney LLC ... | 249 | 87150.00"

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.

What insider transaction did CIEN report in this Form 144?

Officer Dino DiPerna filed a Rule 144 notice to sell 249 shares of CIENA common stock through Morgan Stanley Smith Barney LLC, with an indicated aggregate market value of $87,150.00 and an expected sale date of September 16, 2026 on the NYSE.

Who is selling CIEN (CIENA CORPORATION) shares in this filing?

The seller is Dino DiPerna, identified as an officer of CIENA CORPORATION. The notice covers sales for his account under Rule 144, including an intended sale of 249 shares and prior sales during the last three months.

How many CIEN shares are planned to be sold under this new Rule 144 notice?

The notice states that 249 shares of CIENA common stock are to be sold. The transaction is to be executed through Morgan Stanley Smith Barney LLC Executive Financial Services and is listed with an aggregate market value of $87,150.00.

What CIEN insider sales occurred in the past three months according to this Form 144?

The filing lists two prior sales by Dino DiPerna: 249 shares of CIENA common stock on September 15, 2026 for $80,890.14, and 782 shares on July 15, 2026 for $351,235.30.

At what prices are the recent and planned CIEN sales valued in this filing?

The planned sale of 249 shares is shown with an aggregate market value of $87,150.00. Prior sales include 249 shares valued at $80,890.14 on September 15, 2026 and 782 shares valued at $351,235.30 on July 15, 2026.

What type of CIEN security is being sold in this Form 144 notice?

The security is CIENA CORPORATION common stock, originally held as Restricted Stock. The new Rule 144 notice covers 249 shares, and the past three-month sales section also reports sales of CIENA common stock.

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

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Available on EDGAR 09/16/2026 - 04:41 PM Accepted by SEC EDGAR 09/16/2026 - 04:40 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	0001998460
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 Boulevard, Suite 300 Fulton MARYLAND 20759
Phone	(410) 694-5700
Name of Person for Whose Account the Securities are To Be Sold	DINO DIPERNA
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	249	87150.00	141808525	09/16/2026	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	06/20/2026	Restricted Stock	ISSUER			249	06/20/2026	Not Applicable

* 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
DINO DIPERNA 8150 Maple Lawn Boulevard, Suite 300 Fulton MD 20759	Common	09/15/2026	249	80890.14
DINO DIPERNA 8150 Maple Lawn Boulevard, Suite 300 Fulton MD 20759	Common	07/15/2026	782	351235.30

144: Remarks and Signature

Remarks
Date of Notice	09/16/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	06/10/2026
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/ Dino Cosimo DiPerna
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)