Insider plans Rule 144 sale of 2,500 shares

A holder of CIEN common stock filed a notice under Rule 144 to sell 2,500 shares through Morgan Stanley Smith Barney, with an aggregate market value of $759,800.

Accepted by SEC EDGAR 02/17/2026 - 04:39 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

A holder of CIEN common stock filed a notice under Rule 144 to sell 2,500 shares through Morgan Stanley Smith Barney, with an aggregate market value of $759,800. CIEN had 140,854,735 shares outstanding at the time. The shares come from restricted stock units acquired on 12/20/2017. Over the past three months, the same account sold 2,500 shares on 12/15/2025 for $552,100 and another 2,500 shares on 01/09/2026 for $548,200 under a Rule 10b5-1 trading plan for David M. Rothenstein.

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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	7035 Ridge Road Hanover MARYLAND 21076
Phone	4106945700
Name of Person for Whose Account the Securities are To Be Sold	DAVID M 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	759800.00	140854735	02/17/2026	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	12/20/2017	Restricted Stock Units	Issuer			2500	12/20/2017	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 M ROTHENSTEIN 7035 Ridge Road Hanover MD 21076	Common	01/09/2026	2500	548200.00
10b5-1 Sales for DAVID M ROTHENSTEIN 7035 Ridge Road Hanover MD 21076	Common	12/15/2025	2500	552100.00

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock units during the period of 12/20/2017 through 12/20/2021
Date of Notice	02/17/2026
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 M Rothenstein
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)