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

Rhea-AI Filing Summary

Ciena Corp senior vice president and Chief Strategy Officer David M. Rothenstein sold 2,500 shares of common stock in an open-market transaction. The sale took place on March 16, 2026 at a reported price of $345.0000 per share and was executed under a pre-arranged Rule 10b5-1 trading plan dated October 10, 2025, indicating it was scheduled in advance.

Following this transaction, Rothenstein directly holds 197,194 shares of Ciena common stock, and this figure includes unvested Restricted Stock Units and Performance Stock Units. The filing shows no derivative securities remaining after this sale.

Insights

Equity compensation and insider-trading analyst

Pre-planned, modest insider sale with large remaining stake.

The transaction shows Ciena SVP and Chief Strategy Officer David M. Rothenstein selling 2,500 common shares in an open-market trade at $345.0000 per share. The sale was executed under a Rule 10b5-1 trading plan dated October 10, 2025, suggesting it was pre-scheduled rather than opportunistic.

After the sale, he still directly holds 197,194 shares, including unvested RSUs and PSUs, indicating substantial ongoing equity exposure. No derivative positions are listed, so the filing reflects a straightforward stock sale rather than an option exercise-and-sell pattern.

Because the number of shares sold is small relative to the reported holdings and the trade occurred under a pre-arranged plan, this looks like routine portfolio management rather than a meaningful change in insider sentiment. Subsequent company filings may provide additional context on future equity awards or further 10b5-1 activity.

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)
03/16/2026

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	03/16/2026		S		2,500(1)	D	$345	197,194(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 10/10/2025.

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

	By: Michelle Rankin For: David M. Rothenstein	03/17/2026
	** 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)

FAQ

What did Ciena (CIEN) executive David M. Rothenstein report in this Form 4?

David M. Rothenstein, Ciena’s SVP and Chief Strategy Officer, reported selling 2,500 shares of common stock. The transaction was an open-market sale at a reported price of $345.0000 per share, documented as a standard Section 16 insider trading disclosure.

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

Yes. The filing states the sales were effected pursuant to a Rule 10b5-1 trading plan dated October 10, 2025. Such plans are established in advance, which generally indicates the timing of trades is pre-arranged rather than based on short-term market conditions.

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

After the reported sale, David M. Rothenstein directly holds 197,194 Ciena common shares. The filing notes this figure includes unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs), reflecting both currently owned and unvested equity-based compensation awards.

What type of transaction did the Ciena (CIEN) Form 4 disclose?

The Form 4 discloses a non-derivative transaction coded “S,” meaning an open-market or private sale of common stock. It covers the sale of 2,500 Ciena shares at a reported price of $345.0000 per share by executive David M. Rothenstein.

Does the Ciena (CIEN) filing show any remaining stock options or derivatives for this insider?

No derivative securities are listed in the derivative summary for this Form 4. The disclosure focuses solely on common stock holdings and the 2,500-share sale, with post-transaction ownership reported as 197,194 shares including unvested RSUs and PSUs.