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Ciena Corporation (CIEN)

Ciena Corporation at a glance — key fundamentals, SEC filings, insider buying and selling, and earnings dates.

Ciena Corporation (CIEN) is a Communication Equipment company based in US with a market capitalization of $78B. Revenue grew 18.8% year-over-year and the company generated $665.3M in free cash flow. This page tracks CIEN's SEC filings, insider buying and selling, earnings dates, and key fundamentals in one place.

US · 8.8K employees · IPO Feb 7, 1997

Valuation

Valuation & price

$554.46 · as of May 17, 2026 · -11.6% vs 52w high

653.0

P/E ratio

Latest-FY diluted EPS

28.59

P/B ratio

Market cap ÷ book equity

—

Dividend yield

Price — last 12 months

$620$349$77.75Jul 25Dec 25Jul 26Jul 7, 25$80.13Jul 9, 25$79.33Jul 11, 25$77.75Jul 15, 25$82.61Jul 17, 25$84.81Jul 21, 25$85.47Jul 23, 25$86.75Jul 25, 25$88.60Jul 29, 25$91.07Jul 31, 25$92.84Aug 4, 25$92.67Aug 6, 25$94.31Aug 11, 25$93.38Aug 13, 25$94.66Aug 15, 25$90.87Aug 19, 25$88.77Aug 21, 25$87.36Aug 25, 25$90.74Aug 27, 25$92.74Aug 29, 25$93.97Sep 3, 25$94.82Sep 5, 25$116.69Sep 9, 25$122.19Sep 11, 25$132.50Sep 16, 25$137.48Sep 18, 25$138.04Sep 22, 25$139.31Sep 24, 25$138.42Sep 26, 25$141.93Sep 30, 25$145.67Oct 2, 25$152.66Oct 6, 25$153.25Oct 8, 25$159.66Oct 10, 25$155.94Oct 14, 25$164.82Oct 16, 25$170.78Oct 21, 25$169.71Oct 23, 25$172.58Oct 27, 25$182.54Oct 29, 25$189.27Oct 31, 25$189.92Nov 4, 25$182.87Nov 6, 25$201.46Nov 10, 25$208.74Nov 12, 25$209.52Nov 14, 25$191.71Nov 18, 25$187.00Nov 20, 25$176.45Nov 25, 25$196.24Nov 28, 25$204.21Dec 2, 25$202.50Dec 4, 25$195.73Dec 8, 25$212.93Dec 10, 25$221.85Dec 12, 25$218.44Dec 16, 25$209.84Dec 18, 25$210.71Dec 22, 25$236.75Dec 24, 25$240.28Dec 29, 25$239.00Jan 2, 26$246.06Jan 6, 26$254.19Jan 8, 26$225.21Jan 12, 26$234.26Jan 14, 26$238.38Jan 16, 26$243.42Jan 21, 26$231.89Jan 23, 26$229.14Jan 27, 26$247.52Jan 29, 26$253.53Feb 2, 26$268.49Feb 4, 26$253.50Feb 9, 26$289.68Feb 11, 26$297.25Feb 13, 26$303.92Feb 18, 26$310.96Feb 20, 26$334.95Feb 24, 26$342.70Feb 26, 26$341.16Mar 2, 26$353.73Mar 4, 26$343.55Mar 6, 26$294.17Mar 10, 26$337.36Mar 12, 26$336.83Mar 17, 26$370.05Mar 19, 26$412.58Mar 23, 26$407.90Mar 25, 26$437.70Mar 27, 26$401.61Mar 31, 26$388.23Apr 2, 26$447.76Apr 7, 26$447.88Apr 9, 26$487.38Apr 13, 26$479.90Apr 15, 26$475.76Apr 17, 26$507.43Apr 22, 26$498.97Apr 24, 26$520.80Apr 28, 26$473.69Apr 30, 26$527.58May 4, 26$538.51May 6, 26$576.79May 8, 26$548.11May 12, 26$577.15May 14, 26$591.57May 18, 26$524.53May 20, 26$554.76May 22, 26$583.74May 28, 26$570.18Jun 1, 26$569.61Jun 3, 26$620.37Jun 5, 26$488.21Jun 9, 26$439.34Jun 11, 26$445.22Jun 15, 26$463.41Jun 17, 26$436.72Jun 22, 26$460.33Jun 24, 26$463.51Jun 26, 26$479.50Jul 2, 26$422.46
$77.7552-week range$627.00
Loading valuation history…

Fundamentals

Key fundamentals

$78B

Market cap

18.8%

Revenue growth (YoY)

42.0%

Gross margin

$665.3M

Free cash flow (USD)

$274.1M

Net debt

-1.7%

Share dilution

2/5

Graham criteria passed

Defensive-investor screen

Technology

Sector

Trajectory

Long-term trends

Revenue by year

2016 → 2025

FY 2016$2.6BFY 2017$2.8BFY 2018$3.1BFY 2019$3.6BFY 2020$3.5BFY 2021$3.6BFY 2022$3.6BFY 2023$4.4BFY 2024$4.0BFY 2025$4.8B
$2.6B$4.8B

Free cash flow by year

2016 → 2025

FY 2016$182.3MFY 2017$140.3MFY 2018$161.6MFY 2019$350.6MFY 2020$411.0MFY 2021$462.1MFY 2022$-258.6MFY 2023$62.1MFY 2024$377.9MFY 2025$665.3M
$182.3M$665.3M

Gross margin by year

2021 → 2025

FY 202147.6%FY 202243.0%FY 202342.8%FY 202442.8%FY 202542.0%
47.6%42.0%

Value screen

Graham defensive-investor tests

Computing the scorecard — refreshing any stale inputs…

0

Insider buys · 90 days

14

Insider sells · 90 days

Earnings

Last reported: Jun 4, 2026 (EPS $1.64)

Next expected: not yet scheduled

On the tape

Recent SEC & insider activity

  • Insider sellInsider Sell $740K · 10b5-1 PlanCumello Joseph · SVP, General Mgr. Blue Planet · $739.6KJun 30, 2026Filing
  • Insider sellInsider Sell $57K · 10b5-1 PlanGraff Marc D. · SVP & Chief Financial Officer · $56.6KJun 26, 2026Filing
  • Insider sellInsider Sell $559K · 10b5-1 PlanGage Brodie · SVP Global Products & Supply · $559.3KJun 17, 2026Filing
  • Insider sellInsider Sell $1.1M · 10b5-1 PlanRothenstein David M · SVP and Chief Strategy Officer · $1.1MJun 17, 2026Filing
  • Insider sellInsider Sell $1.3M · 10b5-1 PlanSMITH GARY B · Director, President, CEO · $1.3MJun 17, 2026Filing
  • 8-K eventDebt RefinancingJun 11, 2026Filing
  • 8-K eventConvertible Notes OfferingJun 8, 2026Filing
  • 8-K eventEarnings ReleaseJun 4, 2026Filing
  • Quarterly report10-Q FiledJun 4, 2026Filing
  • Insider sellInsider Sell $1.7M · 10b5-1 PlanSMITH GARY B · Director, President, CEO · $1.7MJun 2, 2026Filing

Questions

Frequently asked questions

What is Ciena Corporation's market cap?

Ciena Corporation (CIEN) has a market capitalization of $78B.

What is CIEN's P/E ratio?

CIEN trades at a price-to-earnings ratio of 653.0, based on its latest fiscal-year diluted earnings per share and the most recent cached price.

What is CIEN's price-to-book (P/B) ratio?

CIEN trades at 28.59 times book value per share.

When did Ciena Corporation last report earnings?

CIEN last reported earnings on June 4, 2026; the next date is not yet scheduled.

Are insiders buying CIEN stock?

SEC Form 4 filings show no open-market insider buys at Ciena Corporation in the last 90 days (14 sells).

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Timeline

Every filing, insider trade & earnings on a price-anchored timeline

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News

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Data: SEC EDGAR filings and cached fundamental data; prices and ratios use the most recent cached quote and statements (may lag by up to a day). Educational and research purposes only. Not investment advice.