Ciena (CIEN) CEO discloses 6,800-share sale under Rule 10b5-1

Rhea-AI Filing Summary

Ciena Corporation President and CEO Gary B. Smith, who also serves as a director, reported selling 6,800 shares of Ciena common stock on 12/22/2025. The sale was coded as an open market sale and was carried out under a Rule 10b5-1 trading plan dated 09/11/2024, meaning the trades were pre-arranged under a preset plan.

The reported shares were sold at a weighted average price of $233.4622, with individual transactions occurring in a price range from $230.6450 to $238.1200. After this transaction, Smith beneficially owns 391,437 shares, which the disclosure notes include unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs).

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

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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)
12/22/2025

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	12/22/2025		S		6,800(1)	D	$233.4622(2)	391,437(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 affected 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 $230.6450 to $238.1200. 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	12/23/2025
	** 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 CIENA CORP (CIEN) report for Gary B. Smith?

The report shows that Gary B. Smith, Ciena's President, CEO, and director, sold 6,800 shares of Ciena common stock on 12/22/2025 in an open market transaction.

At what prices did Gary B. Smith sell CIENA CORP (CIEN) shares?

The filing states a weighted average sales price of $233.4622 per share, with individual sale prices ranging from $230.6450 to $238.1200.

How many CIENA CORP (CIEN) shares does Gary B. Smith own after the transaction?

Following the reported sale, Gary B. Smith beneficially owns 391,437 shares of Ciena common stock. The disclosure notes that this amount includes unvested RSUs and PSUs.

Was the CIENA CORP (CIEN) insider sale made under a Rule 10b5-1 trading plan?

Yes. The explanation states that the sales were effected pursuant to a Rule 10b5-1 trading plan dated 09/11/2024, indicating the trades were made under a pre-arranged plan.

What is Gary B. Smith’s role at CIENA CORP (CIEN)?

Gary B. Smith is identified as a Director and as an Officer, with the title President, CEO of Ciena Corporation.

How was ownership reported in the CIENA CORP (CIEN) Form 4 filing?

The 6,800 shares sold and the 391,437 shares beneficially owned after the transaction are both reported as held with direct (D) ownership.