Ciena (NYSE: CIEN) insider files Form 144 for 2,500-share sale

Rhea-AI Filing Summary

Ciena insider David Rothenstein plans to sell 2,500 shares of common stock through Morgan Stanley Smith Barney, with a proposed sale date of 07/15/2026. The shares relate to Restricted Stock Units granted on 06/20/2020 and follow two 10b5-1 sales in May and June 2026, each for 2,500 shares with reported aggregate values of 1,405,968.75 and 1,142,672.50.

Key Figures

Shares proposed to be sold: 2,500 shares Planned sale aggregate value: 1,117,325.00 Prior 10b5-1 sale value: 1,405,968.75 +2 more

5 metrics

Shares proposed to be sold 2,500 shares Common stock, proposed sale date 07/15/2026

Planned sale aggregate value 1,117,325.00 Reported value for 2,500 common shares to be sold

Prior 10b5-1 sale value 1,405,968.75 Sale of 2,500 common shares on 05/15/2026

Prior 10b5-1 sale value 1,142,672.50 Sale of 2,500 common shares on 06/15/2026

RSU grant-related shares 2,500 shares Restricted Stock Units granted on 06/20/2020

Key Terms

Form 144, 10b5-1 Sales, Restricted Stock Units

3 terms

Form 144 regulatory

"144: Securities To Be Sold"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

10b5-1 Sales regulatory

"10b5-1 Sales for DAVID ROTHENSTEIN 7035 Ridge Road"

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.

Restricted Stock Units financial

"06/20/2020 | 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.

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Available on EDGAR 07/15/2026 - 04:25 PM Accepted by SEC EDGAR 07/15/2026 - 04:25 PM Learn about SEC filing dates

FAQ

What stock sale does CIEN's Form 144 filing disclose?

The Form 144 indicates a planned sale of 2,500 Ciena common shares through Morgan Stanley Smith Barney on 07/15/2026. The filing reports an aggregate value of 1,117,325.00 for this proposed transaction.

Who is selling CIEN shares in this Form 144 filing?

The filing identifies David Rothenstein as the seller, with details provided in the 10b5-1 sales section. He is associated with transactions in Ciena common stock, including the planned 2,500-share sale and earlier 10b5-1 sales.

What 10b5-1 sales of CIEN stock has David Rothenstein made recently?

The filing lists two 10b5-1 sales of 2,500 Ciena common shares each: one on 05/15/2026 with a reported value of 1,405,968.75 and another on 06/15/2026 valued at 1,142,672.50.

What is the source of the CIEN shares being sold in this Form 144?

The shares planned for sale are tied to Restricted Stock Units granted on 06/20/2020. The Form 144 links the 2,500 common shares to this RSU award from the issuer.

Which broker is handling the planned CIEN share sale in this Form 144?

The planned transaction will be executed through Morgan Stanley Smith Barney LLC Executive Financial Services at 1 New York Plaza, 8th Floor, New York, NY 10004, as disclosed for the 2,500 Ciena common shares to be sold on 07/15/2026.

On which market is the CIEN stock sale in this Form 144 intended to occur?

The Form 144 indicates that the 2,500 Ciena common shares are to be sold on the NYSE. This exchange designation applies to the planned transaction dated 07/15/2026.

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	1117325.00	141552922	07/15/2026	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	06/20/2020	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	06/15/2026	2500	1142672.50
10b5-1 Sales for DAVID ROTHENSTEIN 7035 Ridge Road Hanover MD 21076	Common	05/15/2026	2500	1405968.75

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)