[Form 4] CIENA CORP Insider Trading Activity

Rhea-AI Filing Summary

Ciena Corporation (CIEN) senior vice president of Global R&D, Dino Diperna, reported a sale of company stock in a Form 4 filing. On 11/17/2025, he sold 1,241 shares of Ciena common stock at a price of $190.8 per share. The filing states that this sale was made under a Rule 10b5-1 trading plan dated 7/11/2025, which is a pre-arranged plan for trading company stock. Following the reported transaction, Diperna beneficially owns 38,047 shares of Ciena common stock, and this amount includes 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

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^*

DiPerna Dino

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP Global R&D

3. Date of Earliest Transaction (Month/Day/Year)
11/17/2025

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	11/17/2025		S		1,241(1)	D	$190.8	39,288(2)	D
Common Stock	11/17/2025		S		1,241(1)	D	$190.8	38,047(2)	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 7/11/2025.

2. Shares reported include unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs).

	By: Michelle Rankin For: Dino Diperna	11/18/2025
	** 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 did Ciena (CIEN) executive Dino Diperna report in this Form 4?

Dino Diperna, Ciena's SVP Global R&D, reported a sale of 1,241 shares of Ciena common stock on 11/17/2025 at $190.8 per share.

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

Yes. The filing notes that the sales were effected pursuant to a Rule 10b5-1 trading plan dated 7/11/2025, which is a pre-arranged plan for trading.

How many Ciena (CIEN) shares does Dino Diperna own after the reported transaction?

After the reported transaction, Dino Diperna beneficially owns 38,047 shares of Ciena common stock.

Does the reported Ciena (CIEN) share ownership include RSUs and PSUs?

Yes. The filing explains that the shares reported as beneficially owned include unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs).

What is Dino Diperna’s role at Ciena (CIEN)?

Dino Diperna is identified as an officer of Ciena Corporation, serving as SVP Global R&D.

Is this Ciena (CIEN) Form 4 filed by more than one reporting person?

No. The filing indicates that it is a Form filed by one reporting person, namely Dino Diperna.

What type of security did the Ciena (CIEN) insider sell?

The transaction involved Ciena common stock, as reported in Table I of the Form 4.