David M. Rothenstein - 20 Dec 2025 Form 4 Insider Report for CIENA CORP (CIEN)

Role: SVP and Chief Strategy Officer
Signature: By: Michelle Rankin For: David M Rothenstein
Issuer symbol: CIEN
Transactions as of: 20 Dec 2025
Net transactions value: -$3,850,824
Form type: 4
Filing time: 23 Dec 2025, 14:33:12 UTC
Previous filing: 18 Dec 2025
Next filing: 13 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Rothenstein David M	SVP and Chief Strategy Officer	C/O CIENA CORPORATION, 7035 RIDGE RD., HANOVER	By: Michelle Rankin For: David M Rothenstein	22 Dec 2025	0001444157

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CIEN	Common Stock	Tax liability	$156,401	-679	-0.31%	$230.34	220,733	20 Dec 2025	Direct	F1, F2
transaction	CIEN	Common Stock	Tax liability	$46,989	-204	-0.09%	$230.34	220,529	20 Dec 2025	Direct	F1, F2
transaction	CIEN	Common Stock	Tax liability	$186,806	-811	-0.37%	$230.34	219,718	20 Dec 2025	Direct	F2, F3
transaction	CIEN	Common Stock	Tax liability	$100,428	-436	-0.2%	$230.34	219,282	20 Dec 2025	Direct	F2, F4
transaction	CIEN	Common Stock	Tax liability	$101,119	-439	-0.2%	$230.34	218,843	20 Dec 2025	Direct	F2, F5
transaction	CIEN	Common Stock	Tax liability	$1,999,812	-8,682	-4%	$230.34	210,161	20 Dec 2025	Direct	F2, F6
transaction	CIEN	Common Stock	Tax liability	$418,988	-1,819	-0.87%	$230.34	208,342	20 Dec 2025	Direct	F2, F7
transaction	CIEN	Common Stock	Tax liability	$481,641	-2,091	-1%	$230.34	206,251	20 Dec 2025	Direct	F2, F7
transaction	CIEN	Common Stock	Tax liability	$358,639	-1,557	-0.75%	$230.34	204,694	20 Dec 2025	Direct	F2, F8

* 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 12/13/2022. Acquisition of the RSU was previously reported in Table I of the reporting person's Form 4 filed on 12/15/2022.
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 12/12/2023. Acquisition of the RSU was previously reported in Table I of the reporting person's Form 4 filed on 12/14/2023.
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 12/17/2024. Acquisition of the RSU was previously reported in Table I of the reporting person's Form 4 filed on 12/19/2024.
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 12/14/2021. Acquisition of the RSU was previously reported in Table I of the reporting person's Form 4 filed on 12/16/2021.
F6	Represents shares withheld to cover payment of the tax liabilities of the reporting person related to a market stock unit (MSU) award agreement dated 12/13/2022. The earning of the MSU was previously reported on Table I of the reporting person's Form 4 filed on 12/18/2025.
F7	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.
F8	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.