Insider Rothenstein Files Form 4 on March 20, 2026 Activity
| Field | Detail |
|---|---|
| Company | Rothenstein David M |
| Form Type | 4 |
| Filed Date | Mar 24, 2026 |
| Risk Level | low |
| Pages | 3 |
| Reading Time | 3 min |
| Sentiment | neutral |
Complexity: simple
Sentiment: neutral
Topics: insider-transaction, form-4, ownership-change
TL;DR
**Insider David M. Rothenstein filed a Form 4, signaling a change in his holdings.**
AI Summary
David M. Rothenstein, a reporting insider, filed a Form 4 on March 24, 2026, indicating a change in beneficial ownership of securities as of March 20, 2026. While the filing itself doesn't detail the specific transaction (buy/sell/grant), it signals that an insider's stake in the company has been altered. This matters to investors because insider activity can sometimes be a signal of management's confidence (or lack thereof) in the company's future prospects, potentially influencing stock price.
Why It Matters
Insider transaction filings like this provide transparency into how key personnel are managing their holdings, which can be a valuable data point for investors assessing the company's outlook.
Risk Assessment
Risk Level: low — This filing is purely informational about an insider's ownership change and does not inherently pose a direct financial risk to the company.
Analyst Insight
Investors should seek out the full 'form4.html' document to understand the nature of the transaction (buy or sell) and its size, as this context is crucial for interpreting the insider activity.
Key Players & Entities
- Rothenstein David M (person) — Reporting insider
- 0001444157 (company) — CIK of the reporting person
- 2026-03-24 (date) — Filing Date
- 2026-03-20 (date) — Period of Report
Forward-Looking Statements
- Further details regarding the specific transaction (e.g., buy, sell, grant, exercise) will be found within the full 'form4.html' document, which was not provided in this excerpt. (Rothenstein David M) — high confidence, target: N/A
FAQ
Who filed this Form 4?
David M. Rothenstein, with CIK 0001444157, filed this Form 4.
What is the purpose of a Form 4 filing?
A Form 4 is a 'Statement of changes in beneficial ownership of securities,' used to report changes in ownership of company stock by insiders (officers, directors, or beneficial owners of more than 10% of a class of the company's equity securities).
When was this Form 4 filed and accepted?
This Form 4 was filed on March 24, 2026, and accepted on March 24, 2026, at 19:13:42.
What is the 'Period of Report' for this filing?
The 'Period of Report' for this filing is March 20, 2026.
Where is David M. Rothenstein's mailing address listed in the filing?
The mailing address for David M. Rothenstein is 7035 RIDGE ROAD, HANOVER MD 21076.
Filing Stats: 830 words · 3 min read · ~3 pages · Grade level 7.9 · Accepted 2026-03-24 19:13:42
Filing Documents
- form4.html (4)
- form4.xml (4) — 10KB
- 0001123292-26-000502.txt ( ) — 12KB
From the Filing
SEC FORM 4 SEC Form 4 FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 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 * Rothenstein David M (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 and Chief Strategy Officer 2a. Foreign Trading Symbol 3. Date of Earliest Transaction (Month/Day/Year) 03/20/2026 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 03/20/2026 F 472 (1) D $ 383.89 196,722 (2) D Common Stock 03/20/2026 F 174 (1) D $ 383.89 196,548 (2) D Common Stock 03/20/2026 F 811 (3) D $ 383.89 195,737 (2) D Common Stock 03/20/2026 F 436 (4) D $ 383.89 195,301 (2) D Common Stock 03/20/2026 F 220 (5) D $ 383.89 195,081 (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. Represents shares withheld to cover payment of the tax liabilities of the reporting person related to a restricted stock unit (RSU) award agreement dated 12/13/2022. Acquisition of the RSU was previously reported in Table I of the reporting person's Form 4 filed on 12/15/2022. 2. Shares reported include unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs). 3. Represents shares withheld to cover payment of the tax liabilities of the reporting person related to a restricted stock unit (RSU) award agreement dated 12/12/2023. Acquisition of the RSU was previously reported in Table I of the reporting person's Form 4 filed on 12/14/2023. 4. Represents shares withheld to cover payment of the tax liabilities of the reporting person related to a restricted stock unit (RSU) award agreement dated 12/17/2024. Acquisition of the RSU was previously reported in Table I of the reporting person's Form 4 filed on 12/19/2024. 5. Represents shares withheld to cover payment of the tax liabilities of the reporting person related to a restricted stock unit (RSU) award agreement dated 12/16/2025. Acquisition of the RSU was previously reported in Table I of the reporting person's Form 4 filed on 12/18/2025. By: Michelle Rankin For: David M Rothenstein 03/24/2026 ** 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 man