Ciena officer plans sale of 249 shares, $80,890

A CIENA CORP officer filed a Rule 144 notice to sell 249 shares of CIEN common stock, following earlier sales of 782 shares in the prior three months.

Rhea-AI Filing Summary

CIENA CORP (CIEN) received a notice that company officer Dino DiPerna intends to sell CIENA common stock under Rule 144. The planned sale covers 249 shares of common stock to be sold through Morgan Stanley Smith Barney LLC Executive Financial Services, with a stated market value reference of $80,890.14 as of September 15, 2026.

The shares to be sold derive from restricted stock originally acquired from the issuer on June 20, 2026. Over the prior three months, DiPerna has reported separate sales of 782 shares of CIENA common stock for aggregate proceeds of $351,235.30, which must be aggregated under Rule 144 volume limits.

Key Figures

Shares proposed for sale: 249 shares Market value reference for proposed sale: $80,890.14 Shares sold in prior 3 months: 782 shares +3 more

6 metrics

Shares proposed for sale 249 shares Common stock to be sold under Rule 144

Market value reference for proposed sale $80,890.14 Reference value for the 249 CIENA shares as of September 15, 2026

Shares sold in prior 3 months 782 shares CIENA common stock sold by Dino DiPerna during the past three months

Proceeds from prior 3-month sales $351,235.30 Aggregate proceeds from 782 CIENA shares sold in the past three months

Planned sale date reference September 15, 2026 Date associated with the 249-share planned sale entry

Acquisition date of restricted stock June 20, 2026 Date the restricted stock to be sold was acquired from the issuer

Key Terms

Rule 144, Restricted Stock, aggregate with sales

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 with sales regulatory

"sales are required by paragraph (e) of Rule 144 to be aggregated"

FAQ

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

What does the Form 144 filing disclose for CIEN?

It discloses that CIENA CORP officer Dino DiPerna plans to sell 249 shares of CIENA common stock under Rule 144, with Morgan Stanley Smith Barney LLC Executive Financial Services handling the transaction and a market value reference of $80,890.14 as of September 15, 2026.

How many CIEN shares does Dino DiPerna plan to sell under this Form 144?

The notice covers a proposed sale of 249 shares of CIENA CORP common stock, classified as restricted stock originally acquired from the issuer on June 20, 2026, and intended to be sold pursuant to Rule 144.

What prior CIEN stock sales by Dino DiPerna are reported in the last three months?

Over the past three months, 782 shares of CIENA CORP common stock were sold for aggregate proceeds of $351,235.30. These prior sales are reported for Rule 144 aggregation with the newly proposed 249-share sale.

Which broker is listed for the planned CIEN share sale?

The planned sale of 249 CIENA common shares is to be executed through Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, 8th Floor, New York, NY 10004.

What kind of CIEN securities are being sold under this Form 144?

The securities are CIENA CORP common stock described as restricted stock, originally acquired from the issuer on June 20, 2026, and now intended for resale under Rule 144 subject to its volume and other conditions.

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

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Available on EDGAR 09/15/2026 - 04:23 PM Accepted by SEC EDGAR 09/15/2026 - 04:23 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	80890.14	141808525	09/15/2026	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	07/15/2026	782	351235.30

144: Remarks and Signature

Remarks
Date of Notice	09/15/2026
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)