QS Research · Michael Burry's Scion Capital analyst template · 2006
CIENA CORP (CIEN)
As of 2026-11-08 · 12/15 boxes filled from SEC filings and market data
Conclusion: WATCH
Conviction low · base case none · downside -20% · upside +36%
Section 13's TTM to Aug 1, 2026 base ($887.1M EBITDA [N15], $35.11B EV [N26]) is the right starting point, but I price all three cases at today's 39.6x EV/EBITDA [N28] rather than the 30x-45x comparables band because no non-valuation catalyst justifies a different multiple. At that multiple the TTM base is today's price: 39.6 x $887.1M = $35.13B EV, less $0.60B net debt [N24], divided by 141.81M shares [N5] = about $243, so the base case is 0%. A 20% EBITDA cut gives about $194/share (-20%), while a 35% EBITDA increase, consistent with the FY2026 revenue guide of $6.42B [S100] and the FY2027 growth target [S82], gives about $330/share (+36%). The market is not missing the AI growth story; it is pricing a high multiple with supply and concentration risk, so this is a watch, not a long, until delivery converts guidance into EBITDA.
Key numbers
- Share price: $243.39
- Market cap: $34.51B
- Latest financial period: TTM to Aug 1, 2026
- Revenue (TTM): $6.02B
- EV / EBITDA (TTM): 39.6x
- P/E (TTM): 52.7x
- Price / book: 11.29x
The 15 boxes
- ✓ 1. Long-form business notes
Ciena sells optical transport and switching hardware, IP routing gear, network control/automation software and lifecycle services into cloud providers, service providers and other network operators; FY2025 revenue was $4.77B across four reported segments (Networking Platforms, Platform Software and Services, Blue Planet Automation Software and Services, Global Services). Between the FY2020 10-K and the FY2025 10-K the story shifts from a 'Converged Packet Optical / Packet Networking' portfolio sold mainly on 5G and network transformation to an optical-plus-interconnect portfolio pitched directly at AI data center demand, with the Nubis acquisition (Q4 fiscal 2025) adding short-reach interconnect. Growth has not carried through to operating profit: revenue rose from $3.53B (FY2020) to $4.77B (FY2025) while operating income fell from $487.0M to $197.5M. Cash generation is the strong point — FY2025 operating cash flow $806.1M on capex of $140.8M, with $334.5M returned via buybacks.
- ✓ 2. Competitive advantage
Ciena sells into an intensely competitive, price-led optical networking market against Nokia, Huawei, Cisco, HPE and ZTE — vendors the 10-K itself says have substantially greater financial, operational and marketing resources — and its move into data-center interconnects adds Broadcom, Marvell and Credo. The six-year record shows no pricing power: gross margin fell from ~46.7% in FY2020 to ~41.9% in FY2025 and operating income fell from $487.0M to $197.5M even as revenue rose from $3.53B to $4.77B. Concentration is the other way round from a moat: five customers were ~50% of FY2025 revenue and contracts carry no minimum purchases and allow cancellation. The only advantage the company claims is optical technology leadership; the sources show no durable cost, switching-cost or scale advantage in the numbers.
- ✓ 3. 10-Q takeaways
Fiscal third quarter 2026 revenue rose 37.0% to $1.671B and gross margin to 45.4%, with GAAP operating margin 18.0% and adjusted EPS $2.11; first nine months fiscal 2026 revenue was $4.669B. First nine months operating cash flow was $683.6M, cash/investments were $2.8B, and buybacks were $171.7M in the fiscal third quarter and $335.3M under the program in the first nine months. Guidance is numeric: fiscal fourth quarter 2026 revenue $1.75B plus or minus $50M and fiscal 2026 revenue $6.42B plus or minus $50M; the 10-Q says no material risk-factor change.
- ✓ 4. Corporate governance
Filled; members read this box.
- ✓ 5. Overview of the prior 3 years of 8-K filings
Filled; members read this box.
- ✓ 6. Other significant filings
Filled; members read this box.
- ✓ 7. Chronology of significant news and events
Filled; members read this box.
- ✓ 8. Comparables valuation interpretation
Filled; members read this box.
- ✓ 9. Insider trading interpretation
Filled; members read this box.
- ○ 10. Earnings-call notes
- ○ 11. Impression of the shareholder letter
- ○ 12. Scuttlebutt overview
- ✓ 13. Valuation and risk/reward summary
Filled; members read this box.
- ✓ 14. Current price suppression and potential catalysts
Filled; members read this box.
- ✓ 15. Conclusions
The call above.
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