[Form 4] CIENA CORP Insider Trading Activity

Rhea-AI Filing Summary

Bruce L. Claflin, a director of CIENA CORP (CIEN), reported changes in his beneficial ownership on a Form 4 covering transactions dated 09/24/2025. The filing shows a sale of 8,461 shares at $140.12 and a gift of 4,386 shares for no consideration, leaving Mr. Claflin with 50,238 shares beneficially owned directly. The filing also discloses 11,136 shares held indirectly in a spousal trust for which he disclaims beneficial ownership. The reported holdings include unvested restricted stock units (RSUs). The Form 4 was signed on behalf of Mr. Claflin on 09/25/2025.

Positive

• Timely and detailed disclosure of insider sale and gift, including transaction codes and price
• Clarification of share types (includes unvested RSUs) and explanation of indirect holdings via spousal trust
• Proper disclaimer of beneficial ownership for trust-held shares

Negative

• Insider sale of 8,461 shares may be viewed negatively by some investors despite being a routine disclosure
• Gift of 4,386 shares reduces the reporting person's direct economic stake in the company

Insights

Financial Analyst

TL;DR: Director reported a modest sale and a gift, reducing direct holdings while retaining indirect trust holdings.

The Form 4 discloses a sale of 8,461 shares at $140.12 and a gift of 4,386 shares, leaving 50,238 shares directly owned and 11,136 shares held indirectly in a spousal trust. The filing notes inclusion of unvested RSUs in the reported totals. From a trading-activity perspective, the transactions are routine disclosures by an insider and provide transparency about the director's current and indirect stake. There is no new operational or financial information about the company in this filing.

Corporate Governance Expert

TL;DR: Disclosure appears compliant and clear; gift and trust holdings are properly explained.

The reporting provides required detail: transaction codes (S for sale, G for gift), price for the sale, and explanatory footnotes describing RSUs, the nature of the gift, and the trust beneficiaries. The director disclaims beneficial ownership of trust-held shares, which is standard. The filing indicates timely reporting (transaction 09/24/2025, signature 09/25/2025). This is a routine insider reporting event rather than a governance red flag.

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
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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).

1. Name and Address of Reporting Person^*

Claflin Bruce L.

(Last) (First) (Middle)

C/O CIENA CORPORATION

7035 RIDGE RD.

(Street)

HANOVER MD 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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
09/24/2025

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	09/24/2025		S		8,461	D	$140.12	54,624(1)	D
Common Stock	09/24/2025		G		4,386	D	(2)	50,238(1)	D
Common Stock								11,136	I	By spousal trust(3)

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

2. These shares were given as a gift for which no consideration was received by the Reporting Person.

3. The beneficiaries of the trust are the reporting person's spouse and children. The reporting person disclaims beneficial ownership of the securities held by the trust.

	By: Michelle Rankin For: Bruce L. Claflin	09/25/2025
	** 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.

FAQ

What did CIEN director Bruce L. Claflin report on Form 4?

He reported a sale of 8,461 shares at $140.12 and a gift of 4,386 shares on 09/24/2025, leaving 50,238 shares directly owned.

How many CIEN shares does Bruce L. Claflin indirectly own via a trust?

11,136 shares are held indirectly in a spousal trust for which he disclaims beneficial ownership.

Did the Form 4 disclose unvested awards for CIEN insider Bruce L. Claflin?

Yes; the filing states that reported shares include unvested Restricted Stock Units (RSUs).

Was the insider transaction for CIEN reported timely?

Yes; the transactions are dated 09/24/2025 and the Form 4 was signed on 09/25/2025.

Was any consideration received for the gifted CIEN shares?

No; the filing specifies the 4,386 shares were given as a gift for which no consideration was received.