FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

SMITH GARY B
2. Issuer Name and Ticker or Trading Symbol

CIENA CORP [ CIEN ]
5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

__X__ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
President, CEO
(Last)          (First)          (Middle)

C/O CIENA CORPORATION, 7035 RIDGE RD.
3. Date of Earliest Transaction (MM/DD/YYYY)

1/21/2021
(Street)

HANOVER, MD 21076-1426
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 1/21/2021  S  2500 (1)D$54.4425 (2)475202 (3)D  
Common Stock 1/22/2021  S  2500 (1)D$55.0732 (4)472702 (3)D  

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security3. Trans. Date3A. Deemed Execution Date, if any4. Trans. Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
6. Date Exercisable and Expiration Date7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares

Explanation of Responses:
(1) Sales were effected pursuant to Rule 10b5-1 trading plan dated 9/21/20.
(2) Reflects the weighted average sales price with transactions in a range of sales from $53.86 to $54.915. Upon request by the SEC, full information regarding the number of shares sold at each separate sales price will be provided.
(3) Shares reported include unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs).
(4) Reflects the weighted average sales price with transactions in a range of sales from $54.445 to $55.37. Upon request by the SEC, full information regarding the number of shares sold at each separate sales price will be provided.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
SMITH GARY B
C/O CIENA CORPORATION
7035 RIDGE RD.
HANOVER, MD 21076-1426
X
President, CEO

Signatures
By: Michelle Rankin For: Gary B Smith1/25/2021
**Signature of Reporting PersonDate

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