Massivemarkets

CIEN

Ciena Corporation

NYSE · usd

$326.00+3.36 (+1.04%)
As of 9:16:13 AM EDT on Oct 23, 2026 · 15-minute delayed

Ciena Corporation (CIEN) trades at $326.00 (+1.04%) as of 9:16:13 AM EDT on Oct 23, 2026, -9.35% over the past month. Market cap is $45.75B, with 1.4 days to cover in short interest.

Stock performance

How Ciena Corporation (CIEN) stock has performed from one day to one year, with its 52-week range.

-0.63%
-$2.06 over 1D
$324.38$328.91$333.45$337.984:00 AM5:05 AM6:15 AM8:05 AM9:15 AM$325.20
1D
-10.71%
1W
-9.50%
1M
-9.35%
YTD
+37.96%
1Y
+80.20%
52-wk range
$168.22 – $637.51

Key statistics

Today's trading snapshot for CIEN: day range, open, previous close, volume and market cap.

Day range
$320.70 – $346.29
Open
$343.48
Prev close
$322.64
Volume
3.94M
Market cap
$45.75B
Shares out
141.81M

Valuation and profitability ratios: P/E, P/S, ROE

Valuation and profitability ratios for Ciena Corporation: P/E, P/S, P/B, ROE and more.

P/E
69.92
P/S
7.60
P/B
14.97
P/FCF
56.18
ROE
21.4%
ROA
8.2%
Debt/Equity
1.06
Div yield
0.00%

As of Oct 22, 2026

8-K filings

Material corporate events Ciena Corporation has disclosed to the SEC on Form 8-K.

  • Earnings and performanceSep 3, 2026

    On September 3, 2026, Ciena Corporation ("Ciena") issued a press release announcing its financial results for its fiscal third quarter ended August 1, 2026.

  • Debt activityJun 11, 2026

    On June 11, 2026 and in connection with the Offering, the Company, as borrower, and Ciena Communications, Inc., Ciena Government Solutions, Inc., Ciena Communications International, LLC and Blue Planet Software, Inc., as guarantors, entered into a Refinancing Amendment to Credit Agreement (the "Credit Agreement Amendment") with the lenders party thereto and the Administrative Agent, which amends the Credit Agreement by, among other things, (i) extending the maturity date of the Revolving Facility from October 24, 2028 to October 24, 2030.

  • Debt activityJun 8, 2026

    Ciena Corporation (the "Company") issued a press release announcing its intention to offer (the "Offering") $2.0 billion aggregate principal amount of convertible senior notes due 2031 (the "Notes") in a private placement to persons reasonably believed to be qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended (the "Securities Act").

  • Investor communicationsJun 4, 2026

    In conjunction with the issuance of this press release, Ciena posted to the quarterly results page of the 'Investors' section of www.ciena.com an accompanying investor presentation.

  • Shareholder meetingsMar 31, 2026

    Ciena Corporation held its 2026 annual meeting of stockholders on March 26, 2026. The matters described below were voted on by stockholders at the Annual Meeting and the number of votes cast with respect to each matter, and with respect to the election of directors, were as indicated below: [election of directors results, ratification of auditors, and stockholder advisory vote on executive compensation]

Dividend history and stock splits

Ciena Corporation's recent dividend payments and stock splits.

Dividends

No recent dividends.

Splits

  • 1-for-7Sep 25, 2006

CIEN short interest

How heavily CIEN is shorted: shares short, days to cover and average daily volume.

Days to cover
1.4
Short interest
3.87M
Avg volume
2.68M

As of · reported to FINRA twice monthly.

CIEN news

The latest news and headlines about Ciena Corporation (CIEN).

Frequently asked questions

What is the Ciena Corporation (CIEN) stock price today?

Ciena Corporation (CIEN) is trading at $326.00 (+1.04% on the day) as of 9:16:13 AM EDT on Oct 23, 2026. Prices are delayed at least 15 minutes; real-time quotes are available from the Massive API.

What is Ciena Corporation?

Ciena is a leader in high-speed optical connectivity, providing systems, components, and automation software for telecom providers and enterprises, such as data centers, to enable long-distance connectivity.

What is the short interest in CIEN?

As of Sep 30, 2026, CIEN has 3.87M shares short and 1.4 days to cover.

What exchange is CIEN listed on?

Ciena Corporation (CIEN) trades on NYSE in USD, in the TELEPHONE & TELEGRAPH APPARATUS industry.

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