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 .

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

Q: 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 .

Q: 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.

Q: 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.

Filing Impact

(Very High)

Filing Sentiment

(Negative)

Form Type

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.

Insider Trade Summary

8 transactions reported

Mixed 8 txns

Insider DiPerna Dino

Role SVP Global R&D

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	204	$230.34	$47K
Tax Withholding	Common Stock	444	$230.34	$102K
Tax Withholding	Common Stock	730	$230.34	$168K
Tax Withholding	Common Stock	428	$230.34	$99K
Tax Withholding	Common Stock	319	$230.34	$73K
Tax Withholding	Common Stock	1,783	$230.34	$411K
Tax Withholding	Common Stock	2,050	$230.34	$472K
Tax Withholding	Common Stock	1,401	$230.34	$323K

Holdings After Transaction: Common Stock — 59,550 shares (Direct)

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

Form 4 Insider Transactions: What Each Field Means →

12/23/2025 - 02:26 PM

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).

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

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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
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.

Source: View Original Filing on SEC EDGAR

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.