Ciena officer plans $899K sale of 2,500 shares

The notice also lists two earlier 2,500-share sales by Rothenstein under a Rule 10b5-1 plan.

Rhea-AI Filing Summary

Ciena Corporation officer David Rothstein reported plans to sell 2,500 common shares, with an aggregate market value of $899,000.00 and an approximate sale date of October 15, 2026. Morgan Stanley Smith Barney LLC is listed as the broker. The notice also reports two earlier sales of 2,500 shares each under a Rule 10b5-1 plan: 2,500 shares for $1,095,250.00 on August 14, 2026, and 2,500 shares for $826,208.25 on September 15, 2026. Rothenstein states that the shares to be sold were acquired upon vesting of restricted stock units between September 20, 2021, and March 20, 2024.

Key Figures

Planned sale: 2,500 shares Aggregate market value: $899,000.00 Shares outstanding: 141,808,525 shares +4 more

7 metrics

Planned sale 2,500 shares Ciena common shares; approximate sale date October 15, 2026

Aggregate market value $899,000.00 Planned sale

Shares outstanding 141,808,525 shares Reported in the securities information

Shares sold 2,500 shares September 15, 2026, under a Rule 10b5-1 plan

Aggregate market value $826,208.25 Sale on September 15, 2026

Shares sold 2,500 shares August 14, 2026, under a Rule 10b5-1 plan

Aggregate market value $1,095,250.00 Sale on August 14, 2026

Key Terms

Rule 144, Rule 10b5-1, Restricted Stock Units

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.

Rule 10b5-1 regulatory

"10b5-1 Sales for DAVID ROTHENSTEIN"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

Restricted Stock Units financial

"acquired upon the vesting of restricted stock units"

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.

FAQ

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

How many CIEN shares did David Rothstein plan to sell?

David Rothstein reported plans to sell 2,500 Ciena common shares, with an aggregate market value of $899,000.00 and an approximate sale date of October 15, 2026.

What earlier CIEN sales did David Rothstein report?

The notice lists two earlier sales of 2,500 shares each under a Rule 10b5-1 plan: 2,500 shares for $1,095,250.00 on August 14, 2026, and 2,500 shares for $826,208.25 on September 15, 2026.

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

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Available on EDGAR 10/15/2026 - 04:38 PM EDT Accepted by SEC EDGAR 10/15/2026 - 04:37 PM EDT 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	0001444157
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	DAVID ROTHENSTEIN
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	2500	899000.00	141808525	10/15/2026	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	09/20/2021	Restricted Stock Units	Issuer			2500	09/20/2021	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 8150 Maple Lawn Blvd, Suite 300, Fulton MD 20759	Common	09/15/2026	2500	826208.25
10b5-1 Sales for DAVID ROTHENSTEIN 8150 Maple Lawn Blvd, Suite 300, Fulton MD 20759	Common	08/14/2026	2500	1095250.00

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock units during the period of 9/20/2021 through 3/20/2024.
Date of Notice	10/15/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	10/10/2025
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/ David Rothenstein
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)