Ciena SVP withholds shares to cover RSU taxes

Ciena Corp senior vice president of Global R&D Dino DiPerna reported routine share withholdings for taxes tied to restricted stock units.

Rhea-AI Filing Summary

Ciena Corp senior vice president of Global R&D Dino DiPerna reported routine share withholdings for taxes tied to restricted stock units. On March 20, 2026, a total of 2,052 shares of common stock were disposed of at $383.89 per share to cover tax liabilities on multiple RSU awards.

After these tax-withholding dispositions, DiPerna directly owned 45,289 shares of Ciena common stock, and this figure includes unvested restricted stock units and performance stock units. These transactions were not open-market sales but automatic share withholdings by the company to satisfy tax obligations on previously granted equity awards.

Insider Trade Summary

Exercise Price or Tax Liability: 2,052 shares

Exercise Price or Tax Liability 5 txns

Insider DiPerna Dino

Role SVP Global R&D

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	204	$383.89	$78K
Exercise Price or Tax Liability	Common Stock	444	$383.89	$170K
Exercise Price or Tax Liability	Common Stock	730	$383.89	$280K
Exercise Price or Tax Liability	Common Stock	427	$383.89	$164K
Exercise Price or Tax Liability	Common Stock	247	$383.89	$95K

Holdings After Transaction: Common Stock — 45,289 shares (Direct)

Footnotes (6)

1. F1. 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. F2. Shares reported include unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs).
3. F3. 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. F4. 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. F5. 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. F6. Represents shares withheld to cover payment of the tax liabilities of the reporting person related to a restricted stock unit (RSU) award agreement dated 12/16/2025. Acquisition of the RSU was previously reported in Table I of the reporting person's Form 4 filed on 12/18/2025.

FAQ

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What did Ciena (CIEN) executive Dino DiPerna report in this Form 4?

Dino DiPerna reported that 2,052 Ciena common shares were withheld on March 20, 2026 to cover tax liabilities from vested RSU awards. These were automatic tax-withholding dispositions, not open-market stock sales, associated with previously granted restricted stock units.

Were Dino DiPerna’s Ciena (CIEN) transactions open-market sales of stock?

No, the Form 4 shows code F tax-withholding dispositions, meaning shares were withheld by Ciena to pay DiPerna’s tax liabilities on vesting RSUs. The filing specifies these transactions as payment of tax obligations rather than discretionary open-market sales of shares.

How many Ciena (CIEN) shares does Dino DiPerna hold after these transactions?

Following the March 20, 2026 tax-withholding dispositions, Dino DiPerna directly owned 45,289 Ciena common shares. Footnotes clarify that this reported figure includes both unvested restricted stock units and performance stock units, giving a consolidated view of his equity position after the RSU-related tax withholdings.

What is the total number of Ciena (CIEN) shares withheld for Dino DiPerna’s taxes?

The transaction summary reports 2,052 Ciena common shares withheld at a price of $383.89 per share. These shares were used to cover tax liabilities arising from several restricted stock unit award agreements granted between 2022 and 2025, as detailed in the Form 4 footnotes.

Which Ciena (CIEN) equity awards were involved in Dino DiPerna’s tax withholdings?

The footnotes indicate the withheld shares relate to RSU award agreements dated December 13, 2022; October 27, 2023; December 12, 2023; December 17, 2024; and December 16, 2025. Each award’s original acquisition was reported in earlier Forms 3 or 4 filed for DiPerna.

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Accepted by SEC EDGAR 03/24/2026 - 07:12 PM Learn about SEC filing dates

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 MARYLAND 21076-1426

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/20/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	03/20/2026		F		204(1)	D	$383.89	47,137(2)	D
Common Stock	03/20/2026		F		444(3)	D	$383.89	46,693(2)	D
Common Stock	03/20/2026		F		730(4)	D	$383.89	45,963(2)	D
Common Stock	03/20/2026		F		427(5)	D	$383.89	45,536(2)	D
Common Stock	03/20/2026		F		247(6)	D	$383.89	45,289(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 12/16/2025. Acquisition of the RSU was previously reported in Table I of the reporting person's Form 4 filed on 12/18/2025.

	By: Michelle Rankin For: Dino Diperna	03/24/2026
	** 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.
* Form 4: SEC 1474 (03-26)