[Form 4] Ciena Corporation Insider Trading Activity

Gary B. Smith, President and CEO and Director of Ciena Corporation (CIEN), reported an insider sale under a pre-existing trading plan.

Rhea-AI Filing Summary

Gary B. Smith, President and CEO and Director of Ciena Corporation (CIEN), reported an insider sale under a pre-existing trading plan. The Form 4 shows he disposed of 6,800 shares of Ciena common stock on 08/15/2025 at a weighted average price of $90.5351 per share, with sale proceeds reflecting transactions priced between $89.5300 and $91.6675. The sale was effected pursuant to a Rule 10b5-1 trading plan dated 09/11/2024. After the reported transaction, Mr. Smith beneficially owns 311,957 shares, a total that includes unvested restricted stock units (RSUs) and performance stock units (PSUs). The filing was signed on behalf of Mr. Smith on 08/18/2025.

Insights

Securities Analyst

TL;DR: Routine, preplanned insider sale under a 10b5-1 plan; ownership remains substantial at 311,957 shares.

The transaction is an orderly disposition executed under a Rule 10b5-1 trading plan, which limits the informational significance of the sale by indicating it was pre-scheduled. The reported weighted average sale price is $90.5351 across trades between $89.53 and $91.6675. Continuing beneficial ownership of 311,957 shares, including unvested RSUs and PSUs, suggests ongoing equity alignment with shareholders. Absent other context, this Form 4 represents a standard insider liquidity event rather than a material change in control or strategy.

Corporate Governance Specialist

TL;DR: Governance signal is neutral — sale follows a documented plan and disclosures are complete.

The filing transparently discloses that sales were effected pursuant to a documented 10b5-1 plan dated 09/11/2024 and provides the weighted average price range. The inclusion of unvested RSUs and PSUs in the total beneficial ownership is explicitly stated, improving clarity around executive interests. From a governance perspective, the timely Form 4 filing and notation of the trading plan meet typical disclosure expectations for insider transactions.

Insider Trade Summary

Net Seller: 6,800 shares

Net Sell 1 txn

Insider SMITH GARY B

Role President, CEO

Sold 6,800 shs ($616K)

Type	Security	Shares	Price	Value
Sale	Common Stock	6,800	$90.5351	$616K

Holdings After Transaction: Common Stock — 311,957 shares (Direct)

Footnotes (3)

1. F1. Sales were effected pursuant to Rule 10b5-1 trading plan dated 9/11/2024.
2. F2. Reflects the weighted average sales price with transactions in a range of sales from $89.5300 to $91.6675. Upon request by the SEC, full information regarding the number of shares sold at each separate sales price will be provided.
3. F3. Shares reported include unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs).

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Accepted by SEC EDGAR 08/18/2025 - 08:18 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^*

SMITH GARY B

(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
X	Officer (give title below)		Other (specify below)
	President, CEO

3. Date of Earliest Transaction (Month/Day/Year)
08/15/2025

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	08/15/2025		S		6,800(1)	D	$90.5351(2)	311,957(3)	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 effected pursuant to Rule 10b5-1 trading plan dated 9/11/2024.

2. Reflects the weighted average sales price with transactions in a range of sales from $89.5300 to $91.6675. Upon request by the SEC, full information regarding the number of shares sold at each separate sales price will be provided.

3. Shares reported include unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs).

	By: Michelle Rankin For: Gary B Smith	08/18/2025
	** 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.