Form 4: CIEN CEO Gary B. Smith sale; ownership now 268,470

Rhea-AI Filing Summary

Ciena (CIEN) CEO and Director Gary B. Smith reported an insider sale on 11/03/2025. He sold 6,800 shares of common stock pursuant to a Rule 10b5-1 trading plan dated 09/11/2024.

The weighted-average price was $190.451, with trades executed between $188.2450 and $192.3400. Following the transaction, Smith beneficially owns 268,470 shares, held directly; this total includes unvested RSUs and PSUs.

Insider Trade Summary

Net Seller: 6,800 shares ($1,295,067)

Net Sell 1 txn

Insider SMITH GARY B

Role President, CEO

Sold 6,800 shs ($1.30M)

Type	Security	Shares	Price	Value
Sale	Common Stock	6,800	$190.451	$1.30M

Holdings After Transaction: Common Stock — 268,470 shares (Direct)

Footnotes (1)

1. Sales were effected pursuant to Rule 10b5-1 trading plan dated 09/11/2024. Reflects the weighted average sales price with transactions in a range of sales from $188.2450 to $192.3400. Upon request by the SEC, full information regarding the number of shares sold at each separate sales price will be provided. Shares reported include unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs).

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SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

SMITH GARY B

(Last) (First) (Middle)

C/O CIENA CORPORATION

7035 RIDGE RD.

(Street)

HANOVER MD 21076-1426

(City) (State) (Zip)

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

3. Date of Earliest Transaction (Month/Day/Year)
11/03/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

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. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction 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	11/03/2025		S		6,800(1)	D	$190.451(2)	268,470(3)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. 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: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Sales were effected pursuant to Rule 10b5-1 trading plan dated 09/11/2024.

2. Reflects the weighted average sales price with transactions in a range of sales from $188.2450 to $192.3400. 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).

	By: Michelle Rankin For: Gary B Smith	11/05/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did CIEN report?

Ciena CEO and Director Gary B. Smith reported selling 6,800 shares of common stock on 11/03/2025.

At what price were the CIEN shares sold?

The sale used a weighted-average price of $190.451, with individual trades ranging from $188.2450 to $192.3400.

Was the CIEN sale under a 10b5-1 plan?

Yes. Sales were effected under a Rule 10b5-1 trading plan dated 09/11/2024.

How many CIEN shares does Gary B. Smith own after the sale?

He beneficially owns 268,470 shares following the transaction.

What is included in the reported CIEN share ownership?

The ownership total includes unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs).

What is the ownership form of the remaining CIEN shares?

The filing lists the ownership as Direct (D).

What role does Gary B. Smith hold at Ciena (CIEN)?

He is President, CEO, and a Director of Ciena.