CIEN (CIEN) insider 10b5-1 sales and proposed 2,500-share RSU resale

Rhea-AI Filing Summary

CIEN notice of proposed sale: a broker-dealer filing lists 2,500 shares of Common stock issued as Restricted Stock Units to be sold. The filing identifies prior 10b5-1 plan sales by David Rothenstein of 2,500 shares on 03/16/2026, 04/15/2026, and 05/15/2026 with stated proceeds.

Insights

Securities Compliance Counsel

Filing documents 10b5-1 plan sales and a proposed resale of RSUs.

The filing records a broker-dealer entry and a proposed sale of 2,500 shares of Common stock described as Restricted Stock Units. It also lists three prior plan-based dispositions by David Rothenstein on 03/16/2026, 04/15/2026, and 05/15/2026.

Because the sales are noted as 10b5-1, these dispositions are presented as pre-arranged trading-plan transactions; timing and cash-flow counterparties are not detailed in the excerpt.

Equity Compensation Analyst

Observed pattern: repeated 2,500-share plan sales across three months.

The record shows identical share quantities sold under a 10b5-1 plan on three dates and a separate 2,500-share resale item tied to RSUs. The amounts received are listed per trade in the excerpt.

These entries document routine monetization of compensation awards; subsequent filings would show remaining holdings or plan terms if disclosed.

Key Figures

Proposed resale: 2,500 shares Sale on 03/16/2026: 2,500 shares Sale on 04/15/2026: 2,500 shares +1 more

4 metrics

Proposed resale 2,500 shares Restricted Stock Units to be sold

Sale on 03/16/2026 2,500 shares 10b5-1 sale proceeds <money>$862,500.00</money>

Sale on 04/15/2026 2,500 shares 10b5-1 sale proceeds <money>$1,169,134.00</money>

Sale on 05/15/2026 2,500 shares 10b5-1 sale proceeds <money>$1,405,968.75</money>

Key Terms

10b5-1, Restricted Stock Units, Filer (broker-dealer)

3 terms

10b5-1 regulatory

"10b5-1 Sales for DAVID ROTHENSTEIN 7035 Ridge Road Hanover"

A 10b5-1 plan is a pre-set schedule that lets company insiders buy or sell shares according to written instructions made when they do not possess material, nonpublic information. Think of it as a timed automatic payment for stock trades: it helps insiders avoid accusations of trading on secret information and gives outside investors a clearer signal about whether sales are routine or potentially informative about the company’s prospects.

Restricted Stock Units financial

"Common | 06/20/2020 | Restricted Stock Units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Filer (broker-dealer) regulatory

"Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza"

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Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	2500	1114950.00	141552922	06/15/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	06/20/2020	Restricted Stock Units	Issuer			2500	06/20/2020	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
10b5-1 Sales for DAVID ROTHENSTEIN 7035 Ridge Road Hanover MD 21076	Common	05/15/2026	2500	1405968.75
10b5-1 Sales for DAVID ROTHENSTEIN 7035 Ridge Road Hanover MD 21076	Common	04/15/2026	2500	1169134.00
10b5-1 Sales for DAVID ROTHENSTEIN 7035 Ridge Road Hanover MD 21076	Common	03/16/2026	2500	862500.00

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the CIEN Form 144 say about the shares being sold?

The filing lists a proposed sale of 2,500 shares of Common stock described as Restricted Stock Units. It identifies the security class and the quantity to be sold by the reporting party.

Who executed prior 10b5-1 sales shown in the filing for CIEN?

The excerpt names David Rothenstein as the seller under a 10b5-1 plan, reporting sales of 2,500 shares on 03/16/2026, 04/15/2026, and 05/15/2026.

What proceeds were reported for the recent 10b5-1 sales in the CIEN excerpt?

The filing shows proceeds of $862,500.00 on 03/16/2026, $1,169,134.00 on 04/15/2026, and $1,405,968.75 on 05/15/2026 for each respective 2,500-share sale.

Was the Form 144 filed by the broker or the individual for CIEN?

The excerpt lists Morgan Stanley Smith Barney LLC as the filer, while the reported selling transactions are attributed to David Rothenstein under a 10b5-1 plan, per the disclosed rows.

Do these entries show if the company receives any proceeds from the sales?

The excerpt attributes sales to an insider plan and broker-dealer filer; it does not state that the issuer will receive proceeds, nor does it describe use of proceeds in the provided text.