Ciena (CIEN) SVP Global R&D files Form 4 on RSU and PSU taxes

Rhea-AI Filing Summary

Ciena Corporation senior vice president of Global R&D, Dino DiPerna, reported several insider transactions in Ciena common stock on 12/20/2025. The filings show multiple entries coded "F," which indicate shares were withheld by the company to cover income tax obligations tied to previously granted restricted stock units (RSUs) and performance stock units (PSUs).

The transactions involved small blocks of Ciena common stock at a reported price of $230.34 per share, each linked to specific RSU or PSU award agreements granted between 2021 and 2024. After these tax-withholding events, DiPerna beneficially owned 52,395 shares of Ciena common stock, including unvested RSUs and 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

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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).

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)
12/20/2025

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	12/20/2025		F		204(1)	D	$230.34	59,550(2)	D
Common Stock	12/20/2025		F		444(3)	D	$230.34	59,106(2)	D
Common Stock	12/20/2025		F		730(4)	D	$230.34	58,376(2)	D
Common Stock	12/20/2025		F		428(5)	D	$230.34	57,948(2)	D
Common Stock	12/20/2025		F		319(6)	D	$230.34	57,629(2)	D
Common Stock	12/20/2025		F		1,783(7)	D	$230.34	55,846(2)	D
Common Stock	12/20/2025		F		2,050(7)	D	$230.34	53,796(2)	D
Common Stock	12/20/2025		F		1,401(8)	D	$230.34	52,395(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. Represents shares withheld to cover payment of the tax liabilities of the reporting person related to a restricted stock unit (RSU) award agreement dated 10/27/2023. Acquisition of the RSU was previously reported in Table I of the reporting person's Form 4 filed on 10/31/2023.

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

3. Represents shares withheld to cover payment of the tax liabilities of the reporting person related to a restricted stock unit (RSU) award agreement dated 12/13/2022. Acquisition of the RSU was previously reported in Table I of the reporting person's Form 3 filed on 10/31/2023.

4. Represents shares withheld to cover payment of the tax liabilities of the reporting person related to a restricted stock unit (RSU) award agreement dated 12/12/2023. Acquisition of the RSU was previously reported in Table I of the reporting person's Form 4 filed on 12/14/2023.

5. Represents shares withheld to cover payment of the tax liabilities of the reporting person related to a restricted stock unit (RSU) award agreement dated 12/17/2024. Acquisition of the RSU was previously reported in Table I of the reporting person's Form 4 filed on 12/19/2024.

6. Represents shares withheld to cover payment of the tax liabilities of the reporting person related to a restricted stock unit (RSU) award agreement dated 12/14/2021. Acquisition of the RSU was previously reported in Table I of the reporting person's Form 3 filed on 10/31/2023.

7. Represents shares withheld to cover payment of the tax liabilities of the reporting person related to a performance stock unit (PSU) award agreement dated 12/17/2024. The earning of the PSU was previously reported on Table I of the reporting person's Form 4 filed on 12/18/2025.

8. Represents shares withheld to cover payment of the tax liabilities of the reporting person related to a performance stock unit (PSU) award agreement dated 12/12/2023. The earning of the PSU was previously reported on Table I of the reporting person's Form 4 filed on 12/19/2024.

	By: Michelle Rankin For: Dino DiPerna	12/22/2025
	** Signature of Reporting Person	Date
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FAQ

What insider transaction did CIENA CORP (CIEN) report in this Form 4?

The filing reports several insider transactions by Dino DiPerna, where Ciena common shares were withheld to pay tax liabilities arising from vested RSU and PSU awards.

Who is the reporting person in the CIEN Form 4 and what is their role?

The reporting person is Dino DiPerna, who serves as SVP Global R&D at Ciena Corporation.

When did the reported CIEN insider transactions occur?

The insider transactions occurred on 12/20/2025, as shown in Table I for the Ciena common stock entries.

How many CIEN shares does the insider beneficially own after these transactions?

After the reported tax-withholding transactions, Dino DiPerna beneficially owned 52,395 shares of Ciena common stock, which include unvested RSUs and PSUs.

What does transaction code "F" mean in the CIENA CORP Form 4?

Transaction code "F" indicates shares were withheld by the issuer to cover the reporting person's tax liabilities related to vested equity awards such as RSUs or PSUs.

Which CIEN equity awards are tied to these tax-withholding transactions?

The shares withheld relate to RSU and PSU award agreements dated 12/14/2021, 12/13/2022, 12/12/2023, 10/27/2023, and 12/17/2024, as explained in the notes.

Are the unvested RSUs and PSUs included in the CIEN share ownership total?

Yes. The filing notes that the shares reported as beneficially owned include unvested RSUs and PSUs.