Ciena executive sells 2,500 shares under 10b5-1

Ciena Corporation executive David M. Rothenstein, SVP and Chief Strategy Officer, sold 2,500 shares of Ciena common stock in an open-market transaction.

Rhea-AI Filing Summary

Ciena Corporation executive David M. Rothenstein, SVP and Chief Strategy Officer, sold 2,500 shares of Ciena common stock in an open-market transaction. The sale took place on February 17, 2026 at a weighted average price of $300.1992 per share, with individual trades executed in a price range from $288.71 to $306.54 under a pre-established Rule 10b5-1 trading plan dated October 10, 2025. After this sale, he directly owns 199,694 shares, which include unvested Restricted Stock Units and Performance Stock Units.

Insider Trade Summary

Net Seller: 2,500 shares

Net Sell 1 txn

Insider Rothenstein David M

Role SVP and Chief Strategy Officer

Sold 2,500 shs ($750K)

Type	Security	Shares	Price	Value
Sale	Common Stock	2,500	$300.1992	$750K

Holdings After Transaction: Common Stock — 199,694 shares (Direct)

Footnotes (3)

1. F1. Sales were affected pursuant to Rule 10b5-1 trading plan dated 10/10/2025.
2. F2. Reflects the weighted average sales price with transactions in a range of sales from $288.71 to $306.54. 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).

FAQ

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

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

Ciena reported that executive David M. Rothenstein sold 2,500 shares of common stock in an open-market transaction on February 17, 2026. The trade was executed under a pre-arranged Rule 10b5-1 trading plan dated October 10, 2025.

At what price were the Ciena (CIEN) shares sold in this Form 4 filing?

The 2,500 Ciena shares were sold at a weighted average price of $300.1992 per share. Individual trades occurred within a price range from $288.71 to $306.54, according to the Form 4 footnote disclosure.

How many Ciena (CIEN) shares does David M. Rothenstein own after this sale?

After the sale, David M. Rothenstein directly owns 199,694 Ciena shares. This figure includes both unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs), as specifically noted in the Form 4 footnotes.

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

Yes. The Form 4 states that the sales were effected pursuant to a Rule 10b5-1 trading plan dated October 10, 2025. Such plans allow pre-scheduled trades, providing a structured framework for insider stock sales.

Who is the insider involved in this Ciena (CIEN) Form 4 transaction?

The insider is David M. Rothenstein, who serves as Senior Vice President and Chief Strategy Officer of Ciena Corporation. He reported an open-market sale of 2,500 shares of Ciena common stock.

What type of security was involved in the Ciena (CIEN) Form 4 sale?

The transaction involved Ciena common stock as a non-derivative security. The Form 4 also notes that the post-transaction holdings count includes unvested RSUs and PSUs held by the reporting executive.

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

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Accepted by SEC EDGAR 02/19/2026 - 11:14 AM 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^*

Rothenstein David M

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP and Chief Strategy Officer

3. Date of Earliest Transaction (Month/Day/Year)
02/17/2026

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	02/17/2026		S		2,500(1)	D	$300.1992(2)	199,694(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 $288.71 to $306.54. 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	02/18/2026
	** 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.