[Form 4] CIENA CORP Insider Trading Activity

Rhea-AI Filing Summary

Ciena Corporation (CIEN) reported an insider transaction: President & CEO and Director Gary B. Smith sold 6,800 shares of common stock on 10/15/2025 in an open-market trade under a Rule 10b5-1 trading plan dated 09/11/2024. The filing lists a weighted average price of $170.2509, with individual sales executed between $167.1500 and $172.6900.

Following the sale, Smith beneficially owns 275,270 shares directly. The reported holdings include unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs).

Insights

Governance & Insider Transactions Analyst

Routine 10b5-1 insider sale; administrative disclosure.

Gary B. Smith, Ciena’s President & CEO and a Director, disclosed selling 6,800 shares on 10/15/2025 under a pre-set Rule 10b5-1 plan. The filing states a weighted average sale price of $170.2509, with trades ranging from $167.1500 to $172.6900.

After the transaction, Smith beneficially holds 275,270 shares directly; the total includes unvested RSUs and PSUs. As a plan-based transaction, activity occurs automatically per instructions, reducing discretion.

Actual market impact depends on overall trading volume and holder decisions. Subsequent filings may provide additional activity details if further plan executions occur.

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)
10/15/2025

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	10/15/2025		S		6,800(1)	D	$170.2509(2)	275,270(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 $167.1500 to $172.6900. 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	10/17/2025
	** 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 (CIEN) report?

Gary B. Smith sold 6,800 shares of common stock on 10/15/2025 under a Rule 10b5-1 plan.

What was the sale price reported in the CIEN Form 4?

The filing reports a weighted average price of $170.2509, with sales between $167.1500 and $172.6900.

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

He beneficially owns 275,270 shares directly after the reported transaction.

What roles does Gary B. Smith hold at CIENA?

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

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

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

Do the reported holdings include equity awards?

Yes. The filing notes holdings include unvested RSUs and PSUs.