Ciena (NYSE: CIEN) strategy chief sells 2,500 shares under 10b5-1

Rhea-AI Filing Summary

Ciena Corp SVP and Chief Strategy Officer David M. Rothenstein sold 2,500 shares of common stock on 2026-07-15 at a weighted average price of $420.9137 per share, effected under a Rule 10b5-1 trading plan dated 10/10/2025. After the sale, he holds 182,731 shares, including unvested RSUs and PSUs.

Insider Trade Summary 10b5-1

Net Seller: 2,500 shares ($1,052,284)

Net Sell 1 txn

Insider Rothenstein David M

Role SVP and Chief Strategy Officer

Sold 2,500 shs ($1.05M)

Type	Security	Shares	Price	Value
Sale	Common Stock	2,500	$420.9137	$1.05M

Holdings After Transaction: Common Stock — 182,731 shares (Direct)

Footnotes (1)

1. Sales were affected pursuant to Rule 10b5-1 trading plan dated 10/10/2025. Reflects the weighted average sales price with transactions in a range of sales from $406.05 to $442.8500. Upon request by the SEC, full information regarding the number of shares sold at each separate sales price will be provided. Shares reported include unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs).

Key Figures

Shares sold: 2,500 shares Weighted average sale price: $420.9137 per share Sale price range: $406.05–$442.8500 per share +2 more

5 metrics

Shares sold 2,500 shares Common stock sale on 2026-07-15 by David M. Rothenstein

Weighted average sale price $420.9137 per share Weighted average sales price for the 2,500-share transaction

Sale price range $406.05–$442.8500 per share Range of individual sale prices within the reported transaction

Post-transaction holdings 182,731 shares Direct holdings after sale, including unvested RSUs and PSUs

10b5-1 plan date 10/10/2025 Date of Rule 10b5-1 trading plan governing the reported sales

Key Terms

Rule 10b5-1 trading plan, Restricted Stock Units (RSUs), Performance Stock Units (PSUs), weighted average sales price

4 terms

Rule 10b5-1 trading plan regulatory

"Sales were effected pursuant to Rule 10b5-1 trading plan dated 10/10/2025."

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

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

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.

Performance Stock Units (PSUs) financial

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

Performance stock units (PSUs) are a form of executive or employee pay that promise company shares only if pre-set performance goals are met over a defined period; think of them as a bonus paid in stock that arrives only when the company hits agreed targets. Investors watch PSUs because they affect the number of shares outstanding (dilution) and reveal how management’s pay is tied to financial or operational results, aligning incentives with shareholder outcomes.

weighted average sales price financial

"Reflects the weighted average sales price with transactions in a range of sales."

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

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/17/2026 - 12:42 PM Accepted by SEC EDGAR 07/17/2026 - 12:42 PM Learn about SEC filing dates

FAQ

What insider transaction did Ciena (CIEN) report for David M. Rothenstein?

David M. Rothenstein, Ciena’s SVP and Chief Strategy Officer, reported selling 2,500 shares of common stock on 2026-07-15. The sale used a weighted average price of $420.9137 per share and was effected under a Rule 10b5-1 trading plan dated 10/10/2025.

At what price were the 2,500 Ciena (CIEN) shares sold?

The 2,500 Ciena shares were sold at a weighted average price of $420.9137 per share. Individual sale prices ranged from $406.05 to $442.8500 per share, with full price-by-price details available to the SEC upon request.

How many Ciena (CIEN) shares does David M. Rothenstein hold after the sale?

After the reported transaction, David M. Rothenstein holds 182,731 Ciena shares. This figure includes unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs) that are reported as part of his direct ownership position.

Was the Ciena (CIEN) insider sale made under a Rule 10b5-1 plan?

Yes. The sales were effected pursuant to a Rule 10b5-1 trading plan dated 10/10/2025. The filing also affirms Rule 10b5-1 status, indicating the trades followed a pre-arranged plan rather than discretionary same-day decisions.

What type of security did David M. Rothenstein sell in the Ciena (CIEN) transaction?

David M. Rothenstein sold common stock of Ciena in a non-derivative transaction. The reported sale covered 2,500 common shares, and his remaining 182,731-share position includes both regular shares and unvested RSUs and PSUs.

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^*

Rothenstein David M

(Last) (First) (Middle)

C/O CIENA CORPORATION

7035 RIDGE RD.

(Street)

HANOVER MARYLAND 21076-1426

(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)
	SVP and Chief Strategy Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/15/2026

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	07/15/2026		S		2,500(1)	D	$420.9137(2)	182,731(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 affected pursuant to Rule 10b5-1 trading plan dated 10/10/2025.

2. Reflects the weighted average sales price with transactions in a range of sales from $406.05 to $442.8500. 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: David M Rothenstein	07/16/2026
	** 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)