# EDGAR Filing Document

**Accession Number:** 0000936395
**File Stem:** 0001193125-26-260665
**Filing Date:** 2026-6
**Character Count:** 21805
**Document Hash:** ee45c1aeb341451526f4d169174113de
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-260665.hdr.sgml**: 20260608

**ACCESSION NUMBER**: 0001193125-26-260665

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 13

**CONFORMED PERIOD OF REPORT**: 20260608

**ITEM INFORMATION**: Other Events

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260608

**DATE AS OF CHANGE**: 20260608

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** CIENA CORP
- **CENTRAL INDEX KEY:** 0000936395
- **STANDARD INDUSTRIAL CLASSIFICATION:** TELEPHONE & TELEGRAPH APPARATUS [3661]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 232725311
- **STATE OF INCORPORATION:** MD
- **FISCAL YEAR END:** 1031

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-36250
- **FILM NUMBER:** 261071003

**BUSINESS ADDRESS:**
- **STREET 1:** 7035 RIDGE ROAD
- **CITY:** HANOVER
- **STATE:** MD
- **ZIP:** 21076
- **BUSINESS PHONE:** 4108658500

**MAIL ADDRESS:**
- **STREET 1:** 7035 RIDGE ROAD
- **CITY:** HANOVER
- **STATE:** MD
- **ZIP:** 21076

?xml version='1.0' encoding='ASCII'? 8-K

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

### FORM 8-K

#### CURRENT REPORT

#### Pursuant to Section 13 or 15(d)

#### of the Securities Exchange Act of 1934

#### Date of Report (Date of earliest event reported): June 8, 2026

## Ciena Corporation

#### (Exact name of registrant as specified in its charter)

#### Commission File Number: 001-36250

---

| | |
|:---|:---|
| **Delaware** | **23-2725311** |
| **(State or other jurisdiction<br>of incorporation)** | **(I.R.S. Employer**<br> **Identification No.)** |

---

---

| | |
|:---|:---|
| **7035 Ridge Road, Hanover, MD** | **21076** |
| **(Address of principal executive offices)** | **(Zip Code)** |

---

#### Registrant's telephone number, including area code: (410) 694-5700

#### Not Applicable

#### (Former name or former address, if changed since last report)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

---

| | |
|:---|:---|
| **Title of each class** | **Name of each exchange**<br> **on which registered** |
| Common Stock, par value $0.01 per share CIEN | New York Stock Exchange |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging Growth Company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

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#### ITEM 8.01 - OTHER EVENTS

#### Convertible Notes Offering
On June 8, 2026, Ciena Corporation (the "Company") issued a press release announcing its intention to offer (the "Offering") $2.0 billion aggregate principal amount of convertible senior notes due 2031 (the "Notes") in a private placement to persons reasonably believed to be qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended (the "Securities Act"). The Notes will be fully and unconditionally guaranteed, on a senior unsecured basis, by each wholly-owned domestic subsidiary of the Company that currently or in the future guarantees its 4.00% senior notes due 2030 or any refinancing of such notes. The Company also intends to grant the initial purchasers of the Notes an option to purchase up to an additional $300.0 million aggregate principal amount of the Notes within a 13-day period beginning on, and including, the initial closing date of the Offering. Accordingly, the Notes will not be registered under the Securities Act and the Notes may not be offered or sold in the United States absent registration or an applicable exemption from the registration requirements of the Securities Act.

In connection with the pricing of the Notes, the Company expects to enter into convertible note hedge transactions with one or more of the initial purchasers of the Notes or affiliates thereof and/or other financial institutions (the "option counterparties"). Concurrently with entry into the convertible note hedge transactions, the Company also expects to enter into warrant transactions with the option counterparties relating to the same number of shares of the Company's common stock, subject to customary anti-dilution adjustments.

The Company intends to use a portion of the net proceeds from the Offering to (i) pay the net cost of the convertible note hedge transactions (after such cost is partially offset by the proceeds of the Company's entry into the warrant transactions) and (ii) to repurchase up to $140 million of shares of the Company's common stock pursuant to its existing stock repurchase program concurrently with the pricing of the Offering in privately negotiated transactions effected with or through one of the initial purchasers or its affiliate. The Company intends to use approximately $1.14 billion of the remaining net proceeds from the Offering to repay amounts outstanding under its senior secured term loan (the "Existing Term Loan"), including accrued interest and pay related fees and expenses. The Company intends to use the remainder of the net proceeds for general corporate purposes, including investments to enhance supply chain capacity.

The completion of the Offering and the effectiveness of the Credit Agreement Amendment (as defined below) are cross-conditional.

A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

#### Credit Agreement Amendment
Pursuant to a Credit Agreement dated July 15, 2024, as amended (the "Credit Agreement") by and among the Company, the lenders party thereto and Bank of America, N.A., as administrative agent (the "Administrative Agent"), the Company maintained the Existing Term Loan and a senior secured revolving credit facility in an aggregate principal amount of $300 million and maturing on October 24, 2028 (the "Revolving Facility").

In connection with the Offering, the Company, as borrower, and Ciena Communications, Inc., Ciena Government Solutions, Inc., Ciena Communications International, LLC and Blue Planet Software, Inc., as guarantors, expect to enter into a Refinancing Amendment to Credit Agreement (the "Credit Agreement Amendment") with the lenders party thereto and the Administrative Agent, pursuant to which, among other things, (i) the maturity date of the Revolving Facility will be extended from October 24, 2028 to October 24, 2030, (ii) the credit spread adjustment applicable to SOFR-based borrowings under the Revolving Facility will be removed, (iii) daily SOFR will be added as an interest rate option for borrowings under the Revolving Facility, (iv) the outstanding borrowings under the Revolving Facility will bear interest, at the Company's election, at a rate per annum (which is subject to increase during an event of default) of, at the option of the Company, either term SOFR or daily SOFR (subject to a floor of 0.00%) plus a margin ranging from 1.25% to 2.00%, as applicable, or a base rate (subject to a floor of 1.00%) plus a margin ranging from 0.25% to 1.00%, in each case, with such interest rate margin based on the Company's consolidated net leverage ratio (the "Total Net Leverage Ratio"), (v) the commitment fee will be payable on the unused portion of the Revolving Facility at a per annum rate ranging from 0.20% to 0.30%, with the actual rate determined according to the Total Net Leverage Ratio and (vi) increased flexibility will be provided with respect to the Offering and the convertible note hedge and warrant transactions described in this Current Report on Form 8-K and Exhibit 99.1 hereto.

------

Except as amended by the Credit Agreement Amendment, the remaining terms of the Credit Agreement will remain in full force and effect.

The effectiveness of the Credit Agreement Amendment is conditioned upon repayment in full of the Existing Term Loan.

#### No Offer or Solicitation
Neither this Current Report on Form 8-K nor the press release filed as Exhibit 99.1 hereto constitutes an offer to sell, or a solicitation of an offer to buy, any securities of the Company, or an offer to buy, or a solicitation of an offer to sell, any of its securities, nor will there be any sale of any of the Company's securities in any state or other jurisdiction in which such offer, sale or solicitation would be unlawful.

#### Cautionary Note Regarding Forward-Looking Statements
This Current Report on Form 8-K contains certain forward-looking statements that are based on the Company's current expectations, forecasts, information and assumptions. These statements involve inherent risks and uncertainties. Actual results or outcomes may differ materially from those stated or implied, because of risks and uncertainties, including those detailed in the Company's most recent annual and quarterly reports filed with the SEC. Forward-looking statements include statements regarding the Company's expectations, beliefs, intentions or strategies and can be identified by words such as "anticipate," "believe," "could," "estimate," "expect," "intend," "may," "should," "will," and "would" or similar words. The Company assumes no obligation to update the information included in Current Report on Form 8-K, whether as a result of new information, future events or otherwise.

These forward-looking statements include, among others, whether the Company will offer the Notes or consummate the Offering, the final terms of the Offering, the anticipated principal amount of the Notes, which could differ based upon market conditions, whether the convertible note hedge and warrant transactions described above will become effective and whether the Company will enter into Credit Agreement Amendment.

#### ITEM 9.01 - FINANCIAL STATEMENTS AND EXHIBITS
(d) The following exhibits are being filed herewith:

---

| | |
|:---|:---|
| Exhibit Number | Description of Document |
| 99.1 | [Press release announcing the launch of the Offering, dated June 8, 2026.](d125730dex991.htm) |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document) |

---

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#### SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | | |
|:---|:---|:---|
|  | **Ciena Corporation** | **Ciena Corporation** |
| Dated: June 8, 2026 | By: | /s/ Sheela Kosaraju |
|  |  | Sheela Kosaraju |
|  |  | SVP, General Counsel and Assistant Secretary |

---

## Exhibit 99.1

**Exhibit 99.1**![LOGO](g125730dsp002.jpg)

---

| | |
|:---|:---|
| **Investor Contact**: | Gregg Lampf |
|  | Ciena Corporation |
|  | +1 (410) 694-5700 |
|  | <u>ir@ciena.com</u> |

---

**<u>FOR IMMEDIATE RELEASE</u>**

**Ciena Announces Proposed Offering of Convertible Senior Notes** 

**HANOVER, Md. – June 8, 2026 –** Ciena<sup>®</sup> Corporation (NYSE: CIEN) (the "Company"), the global leader in high-speed connectivity, today announced that it intends to offer $2.0 billion aggregate principal amount of convertible senior notes due 2031 (the "Notes") in a private offering (the "Offering"). The Notes will be fully and unconditionally guaranteed, on a senior unsecured basis, by each wholly-owned domestic subsidiary of Ciena that currently or in the future guarantees its 4.00% senior notes due 2030 or any refinancing of such notes (the "guarantees"). The Company also intends to grant the initial purchasers of the Notes an option to purchase up to an additional $300.0 million aggregate principal amount of the Notes within a 13-day period beginning on, and including, the initial closing date of the Offering.

The Company intends to use a portion of the net proceeds from the Offering (i) to pay the net cost of the convertible note hedge transactions described below (after such cost is partially offset by the proceeds of the Company's entry into the warrant transactions described below) and (ii) to repurchase up to $140 million of shares of the Company's common stock pursuant to its existing stock repurchase program concurrently with the pricing of the Offering in privately negotiated transactions effected with or through one of the initial purchasers or its affiliate. The Company intends to use approximately $1.14 billion of the remaining net proceeds from the Offering to repay amounts outstanding under its term loan under its existing credit facility and pay related fees and expenses. The Company intends to use the remainder of the net proceeds for general corporate purposes, including investments to enhance supply chain capacity.

Any concurrent repurchases of shares of the Company's common stock described above may result in the Company's common stock trading at prices that are higher than would be the case in the absence of these repurchases, which may result in a higher initial conversion price for the Notes to be offered. In addition, any repurchases of our common stock following the Offering could affect the trading price of the Notes and, if conducted during an observation period for the conversion of any Notes, could affect the number of shares and value of the consideration that is due upon such conversion. Potential hedging activity in connection with the convertible note hedge and warrant transactions described below may also affect the market price of the Company's common stock or the Notes, holders' ability to convert the Notes or the number of shares and value of the consideration to be received upon conversion of the Notes as described below.

The Notes will be senior unsecured obligations of the Company. The Notes will mature on September 15, 2031, unless earlier converted, redeemed or repurchased. Prior to June 15, 2031, the Notes will be convertible only upon satisfaction of certain conditions and during certain periods, and thereafter, the Notes will be convertible at any time until the close of business on the second scheduled trading day immediately preceding the maturity date. The Company will satisfy any conversion by paying cash up to the aggregate principal amount of the Notes to be converted and by paying or delivering, as the case may be, cash, shares of the Company's common stock or

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![LOGO](g125730dsp002.jpg)

a combination of cash and shares of the Company's common stock, at its election, in respect of the remainder, if any, of its conversion obligation in excess of the aggregate principal amount of the Notes being converted. The Company may not redeem the Notes prior to September 20, 2029, except in the event of a cleanup redemption (as defined below). The Notes will be redeemable, in whole or in part, at the Company's option on or after September 20, 2029, upon the satisfaction of certain conditions and subject to certain limitations. In addition, the Notes will be redeemable at any time if the aggregate principal amount of the Notes that remains outstanding is less than 10% of the aggregate principal amount of the Notes initially issued in the Offering and certain other conditions are satisfied (a "cleanup redemption").

In connection with the pricing of the Notes, the Company expects to enter into convertible note hedge transactions with one or more of the initial purchasers of the Notes or affiliates thereof and/or other financial institutions (the "option counterparties"). These transactions are expected to cover, subject to anti-dilution adjustments substantially similar to those applicable to the Notes, the same number of shares of the Company's common stock that will initially underlie the Notes, and are expected generally to reduce any dilutive effect on the Company's common stock of the Notes and/or offset any cash payments the Company is required to make in excess of the principal amount of converted Notes, as the case may be. Concurrently with entry into the convertible note hedge transactions, the Company also expects to enter into warrant transactions with the option counterparties relating to the same number of shares of the Company's common stock, subject to customary anti-dilution adjustments. The warrant transactions could separately have a dilutive effect on the Company's common stock to the extent that the market price per share of the Company's common stock exceeds the strike price of the warrants.

If the initial purchasers exercise their option to purchase additional Notes, the Company expects to enter into additional convertible note hedge transactions and additional warrant transactions with the option counterparties.

The Company has been advised by the option counterparties that, in connection with establishing their initial hedges of the convertible note hedge and warrant transactions, the option counterparties or their respective affiliates expect to enter into various derivative transactions with respect to the Company's common stock and/or purchase shares of the Company's common stock concurrently with or shortly after the pricing of the Notes. This activity could increase (or reduce the size of any decrease in) the market price of the Company's common stock and/or the Notes at that time. The option counterparties or their respective affiliates may also modify their hedge positions by entering into or unwinding various derivatives with respect to the Company's common stock and/or purchasing or selling the Company's common stock or other securities of the Company in secondary market transactions following the pricing of the Notes and prior to the maturity of the Notes (and are likely to do so in connection with any conversion of the Notes, any redemption of Notes, any repurchase of the Notes upon a fundamental change or any other repurchase of Notes if the Company elects to terminate a corresponding portion of the convertible note hedge transactions). This activity could also cause or avoid an increase or a decrease in the market price of the Company's common stock and/or the Notes, which could affect the ability of holders to convert the Notes and, to the extent the activity occurs during any observation period related to a conversion of the Notes, it could affect the number of shares and value of the consideration that noteholders will receive upon conversion of the Notes.

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![LOGO](g125730dsp002.jpg)

The Notes and guarantees are being offered only to persons reasonably believed to be qualified institutional buyers in reliance on Rule 144A under the Securities Act of 1933, as amended (the "Securities Act"). This release shall not constitute an offer to sell or the solicitation of an offer to buy the Notes or guarantees. Any offers of the Notes and guarantees are being made only by means of a private offering memorandum. The Notes, guarantees, and any common stock issuable upon conversion have not been registered under the Securities Act or the securities laws of any other jurisdiction and may not be offered or sold in the United States without registration or an applicable exemption from registration requirements.

###

**About Ciena**

Ciena is the global leader in high-speed connectivity. We build the world's most advanced networks to support exponential growth in bandwidth demand. By harnessing the power of our networking systems, interconnects, automation software, and services, Ciena revolutionizes data transmission and network management. With unparalleled expertise and innovation, we empower our customers, partners, and communities to thrive in the AI era.

**Note to Ciena Investors** 

This press release contains certain forward-looking statements that are based on our current expectations, forecasts, information and assumptions. These statements involve inherent risks and uncertainties. Actual results or outcomes may differ materially from those stated or implied, because of risks and uncertainties, including those detailed in our most recent annual and quarterly reports filed with the SEC. Forward-looking statements include statements regarding our expectations, beliefs, intentions or strategies and can be identified by words such as "anticipate," "believe," "could," "estimate," "expect," "intend," "may," "should," "will," and "would" or similar words. Ciena assumes no obligation to update the information included in this press release, whether as a result of new information, future events or otherwise.

These forward-looking statements include, among others, whether Ciena will offer the Notes or consummate the Offering, the final terms of the Offering, prevailing market conditions, the anticipated principal amount of the Notes, which could differ based upon market conditions, the anticipated use of the net proceeds from the Offering, which could change as a result of market conditions or for other reasons, whether the convertible note hedge and warrant transactions described above will become effective, the effects of entering into these transactions, and the impact of general economic, industry or political conditions in the United States or internationally.