CIENA (CIEN) CFO Marc Graff sells 126 shares in pre-planned trade

Rhea-AI Filing Summary

CIENA CORP Senior Vice President and Chief Financial Officer Marc D. Graff reported an open-market sale of 126 shares of common stock at $449.36 per share on June 24, 2026, executed under a Rule 10b5-1 trading plan. Following this trade, he directly holds 127,081 shares, which the disclosure notes include unvested Restricted Stock Units (RSUs).

Insights

Equity analyst

Routine, pre-planned CFO stock sale of a very small portion of holdings.

SVP & CFO Marc D. Graff executed an open-market sale of 126 CIENA CORP shares at $449.36 per share. The transaction was carried out under a Rule 10b5-1 trading plan dated March 25, 2025, indicating it was pre-scheduled rather than opportunistic.

After the sale, Graff still directly owns 127,081 shares of common stock, and the position disclosed includes unvested RSUs. The sale represents a very small fraction of his reported holdings, consistent with routine liquidity or diversification rather than a major shift in exposure.

Because the sale is both small relative to his remaining stake and executed under a pre-arranged trading plan, it carries limited informational value about management’s view of CIENA CORP’s prospects based solely on this filing.

Insider Trade Summary 10b5-1

Net Seller: 126 shares ($56,619)

Net Sell 1 txn

Insider Graff Marc D.

Role SVP & Chief Financial Officer

Sold 126 shs ($57K)

Type	Security	Shares	Price	Value
Sale	Common Stock	126	$449.36	$57K

Holdings After Transaction: Common Stock — 127,081 shares (Direct, null)

Footnotes (1)

1. Sales were affected pursuant to Rule 10b5-1 trading plan dated 03/25/2025. Shares reported include unvested Restricted Stock Units (RSUs).

Key Figures

Shares sold: 126 shares Sale price per share: $449.36 per share Shares held after transaction: 127,081 shares +2 more

5 metrics

Shares sold 126 shares Open-market sale on June 24, 2026

Sale price per share $449.36 per share Common Stock, open-market transaction

Shares held after transaction 127,081 shares Direct ownership following sale; includes unvested RSUs

Net shares sold 126 shares transactionSummary netBuySellShares

Transaction direction net-sell transactionSummary netBuySellDirection

Key Terms

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

4 terms

Rule 10b5-1 trading plan regulatory

"Sales were affected pursuant to Rule 10b5-1 trading plan dated 03/25/2025."

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)."

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.

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.

non-derivative financial

"transaction_type: non-derivative"

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/26/2026 - 04:56 PM Accepted by SEC EDGAR 06/26/2026 - 04:56 PM 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^*

Graff Marc D.

(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 & Chief Financial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/24/2026

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	06/24/2026		S		126(1)	D	$449.36	127,081(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 03/25/2025.

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

	By: Michelle Rankin For: Marc D. Graff	06/26/2026
	** 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) CFO Marc D. Graff report in this Form 4?

Marc D. Graff reported an open-market sale of 126 CIENA common shares at $449.36 per share. The filing shows this was a routine transaction under a Rule 10b5-1 trading plan and that he still retains a substantial equity position afterward.

How many CIENA (CIEN) shares does the CFO hold after this transaction?

After the reported sale, Marc D. Graff directly holds 127,081 CIENA common shares. The filing notes that this figure includes unvested Restricted Stock Units (RSUs), so it reflects both vested and certain unvested equity-based compensation awards.

Was the CIENA (CIEN) CFO’s stock sale part of a Rule 10b5-1 plan?

Yes. The sale was effected pursuant to a Rule 10b5-1 trading plan dated March 25, 2025. Such plans allow insiders to pre-schedule trades, helping separate routine portfolio management from discretionary market-timing decisions by executives.

How significant is the 126-share sale by CIENA (CIEN) CFO Marc D. Graff?

The transaction covers just 126 shares compared with 127,081 shares held afterward, a very small portion of his stake. Combined with the Rule 10b5-1 plan disclosure, this suggests a routine event rather than a major change in insider ownership exposure.

What type of security did the CIENA (CIEN) CFO sell in this Form 4?

The filing shows a sale of CIENA common stock, classified as a non-derivative security. Footnotes also indicate his reported holdings include unvested Restricted Stock Units (RSUs), which are equity awards that convert into common shares as they vest over time.