Ciena R&D chief sells 498 shares in 10b5-1 plan

Q: What insider transaction did CIEN executive Dino DiPerna report?

He reported two open-market sales of CIENA CORP common stock, selling 249 shares on September 15, 2026 and 249 shares on September 16, 2026, as disclosed in the Form 4.

Q: At what prices were the CIEN shares sold by Dino DiPerna?

The Form 4 reports that 249 CIEN shares were sold at $324.86 per share on September 15, 2026, and 249 CIEN shares were sold at $350.00 per share on September 16, 2026.

Q: What is Dino DiPerna’s role at CIENA CORP (CIEN)?

The reporting person, Dino DiPerna, is identified as EVP & Chief R&D Officer of CIENA CORP in the Form 4.

Q: Do the reported CIEN holdings include RSUs or PSUs?

A Form 4 footnote explains that the shares reported include unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs), indicating that equity awards are part of the reported position.

CIENA’s EVP & Chief R&D Officer reported Rule 10b5-1 sales totaling 498 CIEN shares over two days.

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Form Type

Rhea-AI Filing Summary

CIENA CORP (CIEN) executive Dino DiPerna, EVP & Chief R&D Officer, reported open-market sales of company common stock under a Rule 10b5-1 trading plan. He sold 249 shares on September 15, 2026 at $324.86 per share and 249 shares on September 16, 2026 at $350.00 per share. A footnote states that the shares reported on this Form 4 include unvested Restricted Stock Units and Performance Stock Units.

Insider Trade Summary 10b5-1

Net Seller: 498 shares

Net Sell 2 txns

Insider DiPerna Dino

Role EVP & Chief R&D Officer

Sold 498 shs ($168K)

Type	Security	Shares	Price	Value
Sale	Common Stock ^{F1, F2}	249	$350.00	$87K
Sale	Common Stock ^{F1, F2}	249	$324.86	$81K

Holdings After Transaction: Common Stock — 39,126 shares (Direct)

Footnotes (2)

F1. Sales were affected pursuant to Rule 10b5-1 trading plan dated 6/10/2026.
F2. Shares reported include unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs).

Key Figures

Shares sold September 15, 2026: 249 shares Sale price September 15, 2026: $324.86 per share Shares sold September 16, 2026: 249 shares +3 more

6 metrics

Shares sold September 15, 2026 249 shares Open-market sale of CIENA CORP common stock

Sale price September 15, 2026 $324.86 per share Open-market sale of 249 CIEN shares

Shares sold September 16, 2026 249 shares Open-market sale of CIENA CORP common stock

Sale price September 16, 2026 $350.00 per share Open-market sale of 249 CIEN shares

Total shares sold 498 shares Aggregate of the reported Form 4 sales

Rule 10b5-1 plan date June 10, 2026 Date of trading plan under which sales were effected

Key Terms

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

3 terms

Rule 10b5-1 trading plan regulatory

"Sales were affected pursuant to Rule 10b5-1 trading plan dated 6/10/2026."

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 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"

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.

FAQ

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

What insider transaction did CIEN executive Dino DiPerna report?

He reported two open-market sales of CIENA CORP common stock, selling 249 shares on September 15, 2026 and 249 shares on September 16, 2026, as disclosed in the Form 4.

How many CIEN shares did Dino DiPerna sell in total?

According to the Form 4 transaction summary, Dino DiPerna sold a total of 498 shares of CIENA CORP common stock across the reported transactions.

At what prices were the CIEN shares sold by Dino DiPerna?

The Form 4 reports that 249 CIEN shares were sold at $324.86 per share on September 15, 2026, and 249 CIEN shares were sold at $350.00 per share on September 16, 2026.

Were Dino DiPerna’s CIEN stock sales under a Rule 10b5-1 plan?

Yes. A footnote states that the sales were effected pursuant to a Rule 10b5-1 trading plan dated June 10, 2026, and the Form 4’s Rule 10b5-1 checkbox is marked true.

What is Dino DiPerna’s role at CIENA CORP (CIEN)?

The reporting person, Dino DiPerna, is identified as EVP & Chief R&D Officer of CIENA CORP in the Form 4.

Do the reported CIEN holdings include RSUs or PSUs?

A Form 4 footnote explains that the shares reported include unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs), indicating that equity awards are part of the reported position.

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

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Available on EDGAR 09/17/2026 - 04:18 PM Accepted by SEC EDGAR 09/17/2026 - 04:17 PM

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).

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^*

DiPerna Dino

(Last)

(First)

(Middle)

C/O CIENA CORPORATION

8150 MAPLE LAWN BOULEVARD, SUITE 300

(Street)

FULTON

MARYLAND

20759

(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)
	EVP & Chief R&D Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/15/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	09/15/2026		S		249⁽¹⁾	D	$324.86	39,375⁽²⁾	D
Common Stock	09/16/2026		S		249⁽¹⁾	D	$350	39,126⁽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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. Sales were affected pursuant to Rule 10b5-1 trading plan dated 6/10/2026.

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

	By: Michelle Rankin For: DINO DIPERNA	09/17/2026
	** 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)

Source: View Original Filing on SEC EDGAR

Ciena R&D chief sells 498 shares in 10b5-1 plan

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