Ciena

What the company does

Ciena is in the communications equipment industry, part of the information technology sector. The SEC files it under Telephone & Telegraph Apparatus.

Ciena reports 4 segments: Networking Platforms, Global Services, Platform Software and Services and Blue Planet Automation Software and Services.

Its latest fiscal year, FY2025, ended Nov 1, 2025.

Source: 10-K, Item 1 Business

Risks common in this industry

These are general risks for companies in the communications equipment industry. They are not a summary of Ciena’s own risk factors; for those, read Item 1A of its latest 10-K, linked below.

1. CompetitionTechnology markets move fast, and rivals large and small can change prices or products.
2. Customer demandSpending by customers on technology rises and falls with their budgets and the economy.
3. Security and privacyCyberattacks, outages and data-privacy rules can raise costs or harm customer trust.
4. Supply and tradeReliance on suppliers and exposure to tariffs or export rules can limit what it can sell or build.
5. Intellectual propertyPatent claims and licensing disputes can lead to costs or limits on products.

Source: 10-K, Item 1A Risk Factors (the company's own list, in the company's words)

Three years of key numbers

Every number links to its filing; hover for the XBRL tag. A dash means the number isn't cleanly available, and we don't estimate it.

• Revenue: Total revenue for the fiscal year, as the company reports it on its income statement.
• Net income: Net income attributable to the company's shareholders, after all costs, interest and taxes.
• Operating cash flow: Cash the business brought in from its day-to-day operations during the year (cash flow statement).
• Cash & equivalents: Cash and short-term investments that count as cash equivalents on the balance sheet. Excludes longer-dated marketable securities.
• Total debt: The current part of long-term debt plus long-term debt, at carrying value.
• Diluted shares: Weighted average shares outstanding for the year, including the effect of options and stock awards.

Learn more: How to read an income statement · Earnings per share, basic and diluted · Free cash flow · How to read a balance sheet · Growth rate calculator · P/E calculator · Market cap calculator · Free cash flow calculator · Return on equity and assets calculator

Recent filings

Learn more: 10-K vs. 10-Q vs. 8-K · Form 4 insider filings · Fiscal years and quarters

Tracked funds that report owning Ciena

• Citadel Advisors: 214,064 shares, reported value $105.0M at Jun 30, 2026 (+52.4% in shares since the filing for Mar 31, 2026). Form 13F filed Sep 2, 2026.
• Point72 Asset Management: 210,516 shares, reported value $103.3M at Jun 30, 2026 (−61.3% in shares since the filing for Mar 31, 2026). Form 13F filed Aug 14, 2026.
• Renaissance Technologies: 184,774 shares, reported value $90.6M at Jun 30, 2026 (+88.9% in shares since the filing for Mar 31, 2026). Form 13F filed Aug 13, 2026.
• Millennium Management: 166,420 shares, reported value $81.6M at Jun 30, 2026 (+83.5% in shares since the filing for Mar 31, 2026). Form 13F filed Aug 14, 2026.
• Bridgewater Associates: 101,038 shares, reported value $49.6M at Jun 30, 2026 (−29.8% in shares since the filing for Mar 31, 2026). Form 13F filed Aug 14, 2026.
• Two Sigma Investments: 9,500 shares, reported value $4.7M at Jun 30, 2026 (+172.5% in shares since the filing for Mar 31, 2026). Form 13F filed Aug 14, 2026.

From each fund’s latest Form 13F, which is filed up to 45 days after quarter end and lists long positions in US-listed stocks only. A listing here is a fact about a filing, not a view on the stock. What a 13F does and doesn’t show.