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

Rhea-AI Filing Summary

Ciena Corp senior executive David M. Rothenstein reported an open-market sale of company stock. On June 15, 2026, the SVP and Chief Strategy Officer sold 2,500 shares of Ciena common stock at a weighted average price of about $457.07 per share.

The sale was made 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 187,581 shares of Ciena common stock, which the filing notes include unvested RSUs and PSUs.

Insider Trade Summary 10b5-1

Net Seller: 2,500 shares ($1,142,673)

Net Sell 1 txn

Insider Rothenstein David M

Role SVP and Chief Strategy Officer

Sold 2,500 shs ($1.14M)

Type	Security	Shares	Price	Value
Sale	Common Stock	2,500	$457.069	$1.14M

Holdings After Transaction: Common Stock — 187,581 shares (Direct, null)

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 $448.20 to $475.05. 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: $457.069 per share Post-transaction holdings: 187,581 shares +2 more

5 metrics

Shares sold 2,500 shares Open-market sale on June 15, 2026

Weighted average sale price $457.069 per share Common stock sale on June 15, 2026

Post-transaction holdings 187,581 shares Common stock directly held after sale, includes unvested RSUs and PSUs

Sale price range $448.20–$475.05 per share Range of prices for individual sale trades

Trading plan date October 10, 2025 Date of Rule 10b5-1 trading plan governing the sale

Key Terms

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

5 terms

Rule 10b5-1 trading plan regulatory

"Sales were affected 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.

weighted average sales price financial

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

Restricted Stock Units (RSUs) financial

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

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.

open-market sale financial

"transaction_action: open-market sale"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

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Form 4 Insider Transactions: What Each Field Means →

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)
06/15/2026

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	06/15/2026		S		2,500(1)	D	$457.069(2)	187,581(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 $448.20 to $475.05. 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	06/16/2026
	** 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)

FAQ

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

Ciena reported that SVP and Chief Strategy Officer David M. Rothenstein sold 2,500 shares of common stock in an open-market transaction on June 15, 2026, at a weighted average price of about $457.07 per share.

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

Yes. The filing states that Rothenstein’s stock sales were effected pursuant to a Rule 10b5-1 trading plan dated October 10, 2025, indicating the transactions were pre-arranged rather than discretionary market-timed trades.

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

After selling 2,500 shares, Rothenstein directly holds 187,581 shares of Ciena common stock. The filing notes that this figure includes unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs).

What price range did the Ciena (CIEN) insider sales cover?

The filing reports a weighted average sale price of $457.069 per share, with individual trades executed in a price range from $448.20 to $475.05. Detailed share counts by exact price are available to the SEC upon request.

What role does David M. Rothenstein hold at Ciena (CIEN)?

David M. Rothenstein is Ciena’s Senior Vice President and Chief Strategy Officer. His position makes his share transactions notable for investors tracking insider activity at the company.