Insider sells 5,000 shares under 10b5-1 at CIEN (NYSE: CIEN)

Rhea-AI Filing Summary

Ciena Corporation notice of resale: David Rothenstein reported sales of Company common stock under 10b5-1 plans. The filing lists Restricted Stock Units of 2,500 shares tied to a grant date of 06/20/2021. It records two recent 10b5-1 dispositions: 2,500 shares on 03/16/2026 for $862,500 and 2,500 shares on 02/17/2026 for $750,498.

Insights

Equity Transactions Analyst

Routine Rule 144 resale notices for insider-planned sales under 10b5-1.

The filing documents resale activity by an affiliate (David Rothenstein) using 10b5-1 plans and shows Restricted Stock Units dated 06/20/2021 for 2,500 shares. Two completed 10b5-1 dispositions are itemized with gross proceeds.

These entries are administrative disclosures required for certain insider/resale sales; they disclose transaction dates and amounts but do not change company financials. Subsequent filings would show further disposition details if additional sales occur.

Key Figures

Restricted Stock Units: 2,500 shares 10b5-1 sale proceeds: $862,500 10b5-1 sale proceeds: $750,498

3 metrics

Restricted Stock Units 2,500 shares grant date 06/20/2021

10b5-1 sale proceeds $862,500 2,500 shares sold on 03/16/2026

10b5-1 sale proceeds $750,498 2,500 shares sold on 02/17/2026

Key Terms

Form 144, 10b5-1 Sales, Restricted Stock Units

3 terms

Form 144 regulatory

"144: Securities To Be Sold"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

10b5-1 Sales regulatory

"10b5-1 Sales for DAVID ROTHENSTEIN"

10b5-1 sales are pre-arranged stock-trading plans that let company insiders automatically buy or sell shares according to a fixed schedule or formula, even if they later learn confidential information. Think of it as setting up an automatic thermostat for trades: it creates a clear, documented path that can protect insiders from insider-trading accusations and gives investors a signal about predictable insider activity—though it can also simply be a way for insiders to diversify or raise cash.

Restricted Stock Units financial

"Restricted Stock Units | Issuer | 2500 | 06/20/2021"

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.

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

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Accepted by SEC EDGAR 04/15/2026 - 04:53 PM Learn about SEC filing dates

FAQ

What did CIEN report in this Form 144 filing?

The filing reports insider resale activity under Rule 144 via 10b5-1 plans. It lists a 2,500-share RSU grant dated 06/20/2021 and two executed 10b5-1 sales of 2,500 shares each on 02/17/2026 and 03/16/2026 with the recorded proceeds.

Who conducted the sales disclosed in the CIEN Form 144?

The sales were reported for David Rothenstein. The filing identifies him as the seller and records two 10b5-1 dispositions of 2,500 shares each on specified dates, with the gross amounts shown alongside each transaction.

How many shares and proceeds are shown for the recent CIEN sales?

The filing shows two sales of 2,500 shares each. The proceeds recorded are $750,498 for 02/17/2026 and $862,500 for 03/16/2026, as disclosed in the notice of sale entries.

Are the shares listed in the CIEN filing restricted or vested?

The filing references Restricted Stock Units with a grant date of 06/20/2021. The notice lists the RSU count as 2,500, indicating the source of the shares being offered in the resale disclosure.

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	1167975.00	141398427	04/15/2026	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	06/20/2021	Restricted Stock Units	Issuer			2500	06/20/2021	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	03/16/2026	2500	862500.00
10b5-1 Sales for DAVID ROTHENSTEIN 7035 Ridge Road Hanover MD 21076	Common	02/17/2026	2500	750498.00

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)