Ciena CFO Marc D. Graff sells 97 common shares

The reported 107,136-share position includes unvested restricted stock units.

Rhea-AI Filing Summary

Ciena Corp (CIEN) EVP & Chief Financial Officer Marc D. Graff sold 97 shares of common stock at $355.1900 per share on October 1, 2026, pursuant to a Rule 10b5-1 trading plan dated March 25, 2026. After the sale, he reported direct holdings of 107,136 shares.

Insider Trade Summary 10b5-1

Net Seller: 97 shares

Net Sell 1 txn

Insider Graff Marc D.

Role EVP & Chief Financial Officer

Sold 97 shs ($34K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2	97	$355.19	$34K

Holdings After Transaction: Common Stock — 107,136 shares (Direct)

Footnotes (2)

1. F1. Sales were affected pursuant to Rule 10b5-1 trading plan dated 03/25/2026.
2. F2. Shares reported include unvested Restricted Stock Units (RSUs)

Key Figures

Shares sold: 97 shares Sale price: $355.1900 per share Direct holdings after sale: 107,136 shares

3 metrics

Shares sold 97 shares Common stock sale on October 1, 2026

Sale price $355.1900 per share Common stock sale on October 1, 2026

Direct holdings after sale 107,136 shares Reported after the October 1, 2026 sale; includes unvested Restricted Stock Units (RSUs)

Key Terms

Rule 10b5-1 trading plan, Restricted Stock Units (RSUs)

2 terms

Rule 10b5-1 trading plan regulatory

"pursuant to Rule 10b5-1 trading plan dated"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

Restricted Stock Units (RSUs) financial

"include unvested Restricted Stock Units (RSUs)"

Restricted stock units (RSUs) are a type of company promise to give employees shares of stock in the future, usually after certain conditions like working for a set time. They are like a gift promised today that you receive later, which can become valuable if the company's stock price goes up. RSUs matter because they are a way companies reward employees and can be a significant part of compensation.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many shares did CIEN's CFO sell, and at what price?

Marc D. Graff, Ciena Corp's EVP & Chief Financial Officer, sold 97 shares at $355.1900 per share on October 1, 2026. The sale was made under a Rule 10b5-1 trading plan dated March 25, 2026.

How many shares did Marc D. Graff hold after selling CIEN shares?

He reported direct holdings of 107,136 shares after the sale; the reported amount includes unvested Restricted Stock Units (RSUs).

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/06/2026 - 07:56 PM Accepted by SEC EDGAR 10/06/2026 - 07:55 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).

X

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^*

Graff Marc D.

(Last) (First) (Middle)

C/O CIENA CORPORATION

8150 MAPLE LAWN BOULEVARD, SUITE 300

(Street)

FULTON MARYLAND 20759

(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)
	EVP & Chief Financial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/01/2026

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	10/01/2026		S		97(1)	D	$355.19	107,136(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. Sales were affected pursuant to Rule 10b5-1 trading plan dated 03/25/2026.

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

	By: Michelle Rankin For: Marc D Graff	10/06/2026
	** 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)