Were Dino DiPerna’s Ciena (CIEN) share sales pre-planned?

Yes. The Form 4 states the sales were effected pursuant to a Rule 10b5-1 trading plan dated July 11, 2025. Such plans are established in advance and automate trades, reducing the significance of timing decisions by the executive.

Ciena (CIEN) SVP sells 2,829 shares under Rule 10b5-1 plan

Filing Impact

(Very High)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Ciena Corporation senior vice president Dino DiPerna sold shares in a planned transaction. On April 15, 2026, he executed two open-market sales totaling 2,829 shares of Ciena common stock at 471.79 per share. The transactions were carried out pursuant to a Rule 10b5-1 trading plan dated 7/11/2025, indicating they were pre-scheduled rather than discretionary trades.

Following these sales, DiPerna directly held 42,460 shares of Ciena common stock. The reported balance includes unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs), showing he maintains a significant ongoing equity stake in the company alongside his executive role as SVP Global R&D.

Insider Trade Summary 10b5-1

Net Seller: 2,829 shares ($1,334,694)

Net Sell 2 txns

Insider DiPerna Dino

Role SVP Global R&D

Sold 2,829 shs ($1.33M)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,322	$471.79	$624K
Sale	Common Stock	1,507	$471.79	$711K

Holdings After Transaction: Common Stock — 43,967 shares (Direct)

Footnotes (1)

Sales were effected pursuant to Rule 10b5-1 trading plan dated 7/11/2025. Shares reported include unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs).

Key Figures

Shares sold: 2,829 shares Sale price: 471.79 per share Shares held after sale: 42,460 shares +1 more

4 metrics

Shares sold 2,829 shares Total common shares sold on April 15, 2026

Sale price 471.79 per share Transaction price for both open-market sales

Shares held after sale 42,460 shares Direct Ciena common stock holdings after transactions

Net shares sold 2,829 shares Net share change from transaction summary

Key Terms

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

4 terms

Rule 10b5-1 trading plan regulatory

"Sales were effected pursuant to Rule 10b5-1 trading plan dated 7/11/2025."

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 Performance Stock Units (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.

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.

Form 4 Insider Transactions: What Each Field Means →

04/16/2026 - 10:52 AM

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

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 Global R&D

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/15/2026

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	04/15/2026		S		1,322⁽¹⁾	D	$471.79	43,967⁽²⁾	D
Common Stock	04/15/2026		S		1,507⁽¹⁾	D	$471.79	42,460⁽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 effected pursuant to Rule 10b5-1 trading plan dated 7/11/2025.

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

	By: Michelle Rankin For: Dino Diperna	04/16/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did Ciena (CIEN) report for Dino DiPerna?

Ciena reported that SVP Global R&D Dino DiPerna sold 2,829 shares of common stock in two open-market transactions. These trades occurred on April 15, 2026 and were executed under a pre-arranged Rule 10b5-1 trading plan dated July 11, 2025.

At what price did Ciena (CIEN) executive Dino DiPerna sell shares?

Dino DiPerna sold his Ciena common stock at 471.79 per share. Both open-market sale transactions on April 15, 2026 used this same transaction price, providing a clear reference level for the reported insider sales in this Form 4 filing.

How many Ciena (CIEN) shares does Dino DiPerna hold after the sale?

After the reported transactions, Dino DiPerna directly holds 42,460 Ciena common shares. This post-transaction balance, disclosed in the Form 4, includes unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs) tied to his executive compensation.

What type of securities did Dino DiPerna trade in this Ciena (CIEN) Form 4?

The transactions involved Ciena common stock only, classified as non-derivative securities. Footnotes also explain that DiPerna’s reported holdings after the sale include unvested equity awards, specifically Restricted Stock Units (RSUs) and Performance Stock Units (PSUs).