Form 4: Ciena CEO Gary B. Smith reports 6,800‑share 10b5‑1 sale

Rhea-AI Filing Summary

Ciena (CIEN) CEO and Director Gary B. Smith reported an open‑market sale of 6,800 shares of common stock on 11/10/2025 under a Rule 10b5-1 trading plan dated 9/11/2024. The weighted average sales price was $209.4521, with individual trades executed between $206.29 and $213.48. Following the transaction, Smith beneficially owns 261,670 shares directly; this total includes unvested RSUs and PSUs.

Insider Trade Summary

Net Seller: 6,800 shares ($1,424,274)

Net Sell 1 txn

Insider SMITH GARY B

Role President, CEO

Sold 6,800 shs ($1.42M)

Type	Security	Shares	Price	Value
Sale	Common Stock	6,800	$209.4521	$1.42M

Holdings After Transaction: Common Stock — 261,670 shares (Direct)

Footnotes (1)

1. Sales were affected pursuant to Rule 10b5-1 trading plan dated 9/11/2024. Reflects the weighted average sales price with transactions in a range of sales from $206.29 to $213.48. 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).

Form 4 Insider Transactions: What Each Field Means →

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)
11/10/2025

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	11/10/2025		S		6,800(1)	D	$209.4521(2)	261,670(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 9/11/2024.

2. Reflects the weighted average sales price with transactions in a range of sales from $206.29 to $213.48. 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	11/11/2025
	** 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 on Form 4?

CEO and Director Gary B. Smith sold 6,800 shares of Ciena common stock on 11/10/2025.

What was the sale price for the CIEN shares?

The filing reports a weighted average price of $209.4521, with trades ranging from $206.29 to $213.48.

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

Yes. The sales were effected under a Rule 10b5-1 trading plan dated 9/11/2024.

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

He beneficially owns 261,670 shares directly, which includes unvested RSUs and PSUs.

What is the ownership form reported for the remaining CIEN shares?

The filing lists ownership as Direct (D).

What roles does Gary B. Smith hold at CIEN?

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