Dino Diperna - 20 Sep 2025 Form 4 Insider Report for CIENA CORP (CIEN)

Role: SVP Global R&D
Signature: By: Michelle Rankin For: Dino Diperna
Issuer symbol: CIEN
Transactions as of: 20 Sep 2025
Net transactions value: -$294,036
Form type: 4
Filing time: 23 Sep 2025, 13:31:10 UTC
Previous filing: 16 Jul 2025
Next filing: 17 Oct 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
DiPerna Dino	SVP Global R&D	C/O CIENA CORPORATION, 7035 RIDGE RD., HANOVER	By: Michelle Rankin For: Dino Diperna	22 Sep 2025	0001998460

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CIEN	Common Stock	Tax liability	$28,227	-204	-0.47%	$138.37	43,184	20 Sep 2025	Direct	F1, F2
transaction	CIEN	Common Stock	Tax liability	$61,436	-444	-1%	$138.37	42,740	20 Sep 2025	Direct	F2, F3
transaction	CIEN	Common Stock	Tax liability	$101,010	-730	-1.7%	$138.37	42,010	20 Sep 2025	Direct	F2, F4
transaction	CIEN	Common Stock	Tax liability	$59,222	-428	-1%	$138.37	41,582	20 Sep 2025	Direct	F2, F5
transaction	CIEN	Common Stock	Tax liability	$44,140	-319	-0.77%	$138.37	41,263	20 Sep 2025	Direct	F2, F6

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
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.
F2	Shares reported include unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs).
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.
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.
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.
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 12/14/2021. Acquisition of the RSU was previously reported in Table I of the reporting person's Form 3 filed on 10/31/2023.