CIEN at a glance
Ciena (CIEN, SEC CIK 936395) filed its latest 10-K annual report on December 12, 2025, a 10-Q quarterly report on September 3, 2026, an 8-K current report on September 3, 2026 and Form 4 insider filings as recently as October 6, 2026. SignalX summarizes each filing with AI and tracks the company's insider trades and institutional holders.
- For the fiscal year ended November 1, 2025 (FY2025), Ciena (CIEN) reported revenue of $4.8 billion (up 18.8% from FY2024) and net income of $123.3 million. Diluted EPS was $0.85.
- As of June 30, 2026, 46 institutional investment managers tracked by SignalX reported holding Ciena (CIEN) shares worth $41.1 billion in 13F-HR filings.
- The most recent insider open-market sale reported on Form 4 was by Phipps Jason on October 1, 2026 of 2,629 shares at $355.19 per share.
- In the last 90 days, CIEN insiders reported 0 open-market purchases ($0) and 22 open-market sales ($17.5M) on Form 4, a net sale of $17.5M.
Source: SEC EDGAR (XBRL financial data, 13F-HR and Form 4 filings).
- Revenue · FY2025
- $4.8B
- +18.8% vs prior year
- Insiders · 90 days
- 0 buys · 22 sells
- Net −$17.5M
- 13F holders
- 46 funds
- $41.1B · +2 vs prior quarter
- Latest 8-K
- Sep 3, 2026
- Item 2.02
AI 10-K Annual Report Analysis
Latest 10-K, fiscal year ended Nov 1, 2025
Risk Factors
- Regulatory risk: heightened U.S.-China tensions causing tariffs, export controls, and restrictions disrupting supply chain and increasing costs
- Macroeconomic risk: revenue concentration with 50% from top 5 customers, including one cloud provider at 18%, vulnerable to spending cuts
- Operational risk: $826.2M inventory plus $2.1B non-cancellable purchase commitments exposes supply chain to mismatched demand and obsolete inventory
- Competitive risk: intense competition from larger vendors with broader offerings threatening incumbency and market share
- Financial risk: dependence on concentrated customers and supply chain partners creates exposure to customer financial instability and supplier disruptions
Management Discussion & Analysis
- Revenue $4.8B, up 19% YoY from $4.0B in fiscal 2024
- Gross margin 42.0% vs 42.8% in fiscal 2024, decline driven by lower services margin and product mix shifts
- Best segment: cloud providers with growing orders and two in top five customers by revenue; no specific $ given
- Backlog increased to $5.0B from $2.1B, reflecting strong order growth and supply constraints
- R&D investment $848.3M, up 11% YoY; acquisition of Nubis to enhance AI workload interconnect technology
Business Overview
- Core business model: Network infrastructure solutions for telecommunications and data center providers
- No new products, services, or segments introduced or emphasized this year
- Continued emphasis on corporate governance, including ethics codes for senior financial officers and all employees
- Proxy statement to be filed within 120 days post fiscal year end with detailed executive compensation and governance disclosures
- Filing distinctive for extensive cross-references to proxy statement for critical disclosures rather than including them directly
AI summary of the CIEN 10-K filed . Generated from the filing text; verify against the original.View on SEC EDGARHow to read a 10-K
AI 10-Q Quarterly Report Analysis
Latest 10-Q, quarter ended Aug 1, 2026
Management Discussion & Analysis
- Cash, equivalents and investments $2.84B, up $1.48B from November 1, 2025
- Operating cash flow $683.6M during first nine months of fiscal 2026
- 2031 Notes and Warrants proceeds $1.6B net of refinancing-related items
- Stock repurchases $337.9M; employee tax-withholding repurchases $278.3M
- Capital expenditures $194.9M; employee stock-plan proceeds $38.0M
Risk Factors
- No new or changed risk factors identified; filing references risks from the 2025 Annual Report
- Forward-looking statements risk: unanticipated risks could materially harm business, financial condition, or results
- Capital allocation risk: $171.7 million stock repurchases during fiscal Q3 2026
- Liquidity risk: $335.0 million remaining under $1.0 billion repurchase authorization
- Financing risk: $140.0 million used to repurchase 0.3 million shares tied to 2031 Note offering
AI summary of the CIEN 10-Q filed . Generated from the filing text; verify against the original.View on SEC EDGAR10-K vs 10-Q vs 8-K
AI 8-K Current Report Analysis
The most recent material events, by 8-K item
Item 2.02: Results of Operations and Financial Condition
- Fiscal Q3 2026 results for quarter ended August 1, 2026
- Press release furnished as Exhibit 99.1 with detailed financial results
Item EX-99.1: Item EX-99.1
- Fiscal Q3 2026 revenue $1.67B, up 37% YoY; optical networking drove growth at $1.19B
- Adjusted EPS $2.11, up 215% YoY; adjusted operating margin expanded to 22.5% from 10.7%
Item 1.01: Entry into a Material Definitive Agreement
- Notes sold privately under Section 4(a)(2) and Rule 144A, limiting resale primarily to qualified institutional buyers
- Notes and potential exchange shares unregistered, creating resale restrictions and reduced liquidity for investors
Item 8.01: Other Events
- Ciena announced June 8, 2026 pricing of an offering, with detailed terms in Exhibit 99.1
- Offering proceeds and convertible note hedge and warrant transactions may affect capital structure and future dilution
Item EX-99.1: Item EX-99.1
- $2.5B upsized 0.00% convertible notes due September 15, 2031, reducing near-term cash interest expense
- Approximately $1.14B proceeds earmarked for term-loan repayment, lowering leverage and related financing costs
Item 8.01: Other Events
- Planned $2.0B convertible senior notes due 2031, with $300M additional-purchase option, creating substantial long-term refinancing capacity
- Approximately $1.14B of proceeds targeted to repay the senior secured term loan, reducing secured debt but replacing it with convertible obligations
AI summaries of CIEN 8-K current reports filed with the SEC. What 8-K item codes mean
SignalX for CIEN
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Recent Insider Transactions (Form 4)
Latest reported trades by officers, directors and 10% owners
| Insider | Type | Date | Shares | Price |
|---|---|---|---|---|
| Phipps Jason | Sell | Oct 1, 2026 | 2,629 | $355.19 |
| Graff Marc D. | Sell | Oct 1, 2026 | 97 | $355.19 |
| Kosaraju Sheela | Sell | Oct 1, 2026 | 2,101 | $355.19 |
| Cumello Joseph | Sell | Sep 25, 2026 | 1,586 | $358.52 |
| NEVENS THOMAS MICHAEL | G | Sep 24, 2026 | 2,797 | - |
| Claflin Bruce L. | Sell | Sep 24, 2026 | 2,857 | $355.91 |
| NEVENS THOMAS MICHAEL | Sell | Sep 23, 2026 | 3,738 | $359.04 |
| Gage Brodie | F | Sep 20, 2026 | 231 | $348.80 |
Financial SummaryXBRL
| Metric | FY2023 | FY2024 | FY2025 |
|---|---|---|---|
| Profitability | |||
| Revenue | - | $4.0B | $4.8B |
| Gross Profit | - | $1.7B | $2.0B |
| Operating Income | - | $166.6M | $197.5M |
| Net Income | - | $84.0M | $123.3M |
| Gross Margin | - | 42.8% | 42.0% |
| Op. Margin | - | 4.1% | 4.1% |
| Net Margin | - | 2.1% | 2.6% |
| Balance Sheet | |||
| Total Assets | $5.6B | $5.6B | $5.9B |
| Equity | $2.8B | $2.8B | $2.7B |
| ROE | - | 3.0% | 4.5% |
| Per Share | |||
| EPS | - | $0.58 | $0.85 |
| Cash Flow | |||
| Operating CF | - | $514.5M | $806.1M |
| CapEx | - | $136.6M | $140.8M |
Source: XBRL data in Ciena (CIEN)'s 10-K filings on SEC EDGAR, in USD. Compare across companies →
13F Fund Holdings: Quarterly Trend
Latest: Q2 2026Aggregate CIEN share value held by 13F filers tracked by SignalX, by quarter.
Quarterly totals table
| Quarter | Funds | Total value |
|---|---|---|
| Q2 2026 | 46 | $41.14B |
| Q1 2026 | 44 | $32.88B |
| Q4 2025 | 39 | $20.40B |
| Q3 2025 | 38 | $12.87B |
| Q2 2025 | 36 | $6.41B |
| Q1 2025 | 32 | $3.69B |
| Q4 2024 | 26 | $4.32B |
| Q3 2024 | 22 | $829.4M |
- JPMorgan Chase & Co+979.6K (+10%)
- State Street Corp+371.5K (+6%)
- Vanguard Portfolio Management LLC+311.5K (+4%)
- Ameriprise Financial+204.4K (+109%)
- Invesco Ltd+199.9K (+13%)
- FMR LLC (Fidelity)−2.10M (-10%)
- T. Rowe Price Group−1.17M (-22%)
- BlackRock−655.3K (-5%)
- Prudential Financial−167.4K (-51%)
- Bank of America Corp−166.1K (-8%)
Source: 13F-HR filings on SEC EDGAR (aggregated from 283 fund-quarter rows). Reflects only 13F filers tracked by SignalX, not the full institutional ownership universe. How 13F filings work
CIEN filing archive
AI analysis pages for each 10-K, 10-Q and 8-K
10-K annual reports
10-Q quarterly reports
8-K current reports
Latest 2026 SEC Filings: 10-K, 10-Q, 8-K & Form 4
| Form | Filing date | Period | Analysis | SEC |
|---|---|---|---|---|
| 4 | Oct 6, 2026 | - | - | - |
| 4 | Oct 6, 2026 | - | - | - |
| 4 | Oct 6, 2026 | - | - | - |
| 4 | Sep 29, 2026 | - | - | - |
| 4 | Sep 28, 2026 | - | - | - |
| 4 | Sep 25, 2026 | - | - | - |
| 4 | Sep 22, 2026 | - | - | - |
| 4 | Sep 22, 2026 | - | - | - |
| 4 | Sep 22, 2026 | - | - | - |
| 4 | Sep 22, 2026 | - | - | - |
| 4 | Sep 22, 2026 | - | - | - |
| 4 | Sep 22, 2026 | - | - | - |
| 4 | Sep 22, 2026 | - | - | - |
| 4 | Sep 22, 2026 | - | - | - |
| 4 | Sep 22, 2026 | - | - | - |
| 4 | Sep 17, 2026 | - | - | - |
| 4 | Sep 17, 2026 | - | - | - |
| 4 | Sep 17, 2026 | - | - | - |
| 4 | Sep 17, 2026 | - | - | - |
| 8-K | Sep 3, 2026 | - | Analysis | - |
| 10-Q | Sep 3, 2026 | Aug 1, 2026 | Analysis | |
| 4 | Sep 2, 2026 | - | - | - |
| 4 | Aug 18, 2026 | - | - | - |
| 4 | Aug 18, 2026 | - | - | - |
| 4 | Aug 18, 2026 | - | - | - |
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CIEN SEC filings: frequently asked questions
Are CIEN insiders buying or selling?
In the last 90 days, Ciena (CIEN) officers, directors and 10% owners reported no open-market purchases and 22 open-market sales worth $17.5 million by 10 insiders on Form 4. Many insider sales are pre-planned or for taxes, so purchases usually carry more information.
Which institutions hold CIEN stock?
As of June 30, 2026, the largest Ciena (CIEN) holders among the 13F filers tracked by SignalX were FMR LLC (Fidelity) ($9.4 billion), BlackRock ($6.2 billion), JPMorgan Chase & Co ($5.4 billion), Vanguard Capital Management LLC ($4.5 billion), Vanguard Portfolio Management LLC ($3.8 billion). 13F-HR reports are filed up to 45 days after each quarter ends.
What was CIEN's revenue in fiscal year 2025?
For the fiscal year ended November 1, 2025 (FY2025), Ciena (CIEN) reported revenue of $4.8 billion (up 18.8% from FY2024) and net income of $123.3 million. Diluted EPS was $0.85. The figures come from the XBRL data in the 10-K.
What are the main risks in CIEN's latest 10-K?
In the 10-K filed December 12, 2025, Ciena (CIEN) flagged: Regulatory risk: heightened U.S.-China tensions causing tariffs, export controls, and restrictions disrupting supply chain and increasing costs. Macroeconomic risk: revenue concentration with 50% from top 5 customers, including one cloud provider at 18%, vulnerable to spending cuts. (AI summary of the Risk Factors section.)
What did CIEN report in its latest 8-K?
Ciena (CIEN) filed an 8-K on September 3, 2026 reporting Item 2.02 (Results of Operations and Financial Condition). Fiscal Q3 2026 results for quarter ended August 1, 2026.
What are the latest CIEN SEC filings?
Ciena (CIEN) filed its latest 10-K annual report on December 12, 2025, a 10-Q quarterly report on September 3, 2026, an 8-K current report on September 3, 2026 and a Form 4 insider filing on October 6, 2026.
What is CIEN's SEC CIK number?
Ciena (CIEN)'s SEC Central Index Key (CIK) is 936395. EDGAR lists every CIEN filing under that number.
Ask anything about CIEN
The research agent reads CIEN's filings, financials, insider trades and 13F holders, then answers with sources.