Ciena (CIEN)
Information Technology · optical networking and telecommunications equipment · NYSE
Ciena provides high-speed optical networking, routing, and automation software designed to scale network capacity and meet the massive bandwidth demands driven by artificial intelligence and cloud computing.
What Ciena does
Ciena is a network technology company that provides hardware, software, and services to global network operators. Its solutions, which include optical networking and routing and switching platforms, are designed to increase network capacity, enable service delivery, and support high-bandwidth applications such as AI, cloud services, video, and data. The company also offers software for network automation and lifecycle management, along with comprehensive professional services.
Recent developments
For the fiscal third quarter 2026, Ciena reported revenue of $1.67 billion, a 37% year-over-year increase, and raised its fiscal year 2026 revenue guidance to approximately $6.42 billion. The company completed a $2.9 billion convertible note offering to refinance debt and continued its share repurchase program.
From Ciena's filing of 2026-09-03.
Themes: AI infrastructure, optical networking, network automation, cloud infrastructure, high-speed connectivity, network transformation
Fundamentals
- Price$425.93 as of 2026-10-08 close
- Market cap$60.4B as of 2026-08-28 (share count; price 2026-10-08)
- 1-year return+166.8% 2025-10-08 close $159.66 → 2026-10-08 close $425.93
- P/E141.77 as of 2026-10-08
- Net margin+2.6% FY2025, SEC XBRL
- Gross margin+42.0% FY2025, SEC XBRL
- ROE+4.5% FY2025, SEC XBRL
- Debt / equity0.53 as of 2026-09-03
- Revenue growth (YoY)+30.6% as of 2026-09-03
- Revenue CAGR (3y)+9.5% SEC XBRL
- Beta2.00 as of 2026-09-03
- Last reported earnings2026-09-03 SEC EDGAR Form 8-K (Item 2.02)
How CIEN compares in its sector
- price-to-earnings ratiotop 25% 253 covered Information Technology peers, as of 2026-10-08
- net profit marginmiddle range 380 covered Information Technology peers, as of 2026-09-03
- operating marginmiddle range 375 covered Information Technology peers, as of 2026-09-03
- gross marginmiddle range 311 covered Information Technology peers, as of 2026-09-03
- return on equitymiddle range 370 covered Information Technology peers, as of 2026-09-03
- 3-year revenue CAGRmiddle range 385 covered Information Technology peers
- free cash flow (absolute dollars, latest fiscal year)top 25% 382 covered Information Technology peers, as of FY2025
Position among covered Information Technology companies that report each metric (minimum 5 peers). A relative position within our covered catalog — not a valuation, quality, or investment judgment. A higher percentile is simply a higher value (for P/E, more expensive on earnings — never "better"). Informational only.
How Ciena looks technically
Ciena (CIEN) is trading 8.6% above its 200-day average, the long-term trend line — a longer-term uptrend. Its 50-day average crossed below its 200-day average about 13 trading days ago — a "death cross", a bearish long-term signal. There is no clear trend right now — the price is choppy (ADX, a 0–100 trend-strength gauge, is 16, below the 25 that marks a real trend), though buyers have been pushing harder than sellers lately — pressure, not a trend. Momentum is neutral — its 14-day RSI (a 0–100 momentum gauge) is 63, neither overbought (above 70) nor oversold (below 30). It made a new 20-day high about 2 trading days ago. It is 33.2% below its highest point of the past year.
Trend
9
| Distance from the 200-day | it is trading 8.6% above its 200-day average, the long-term trend line — a longer-term uptrend | +8.6% |
|---|---|---|
| 50-day moving average | its average price over the last 50 trading days — a short-term trend line — is $379.10 | $379.10 |
| 200-day moving average | its average price over the last 200 trading days — the long-term trend line — is $392.12 | $392.12 |
| Swing structure | its recent peaks and dips disagree — one of them is rising while the other is not, so there is no clean up or down pattern in the swings | mixed — one of the two is not confirming |
| Last swing turn | its last significant turn was a swing low 10 calendar days ago — the swings before that are what the structure reading is measured on | 10 sessions |
| Wave structure | its recent swings can be read as a completed three-part downward correction — a pullback in the A-B-C shape Elliott-wave chartists use; the labelling fails if price closes below 339.33. It is the only labelling that fits, though not with textbook proportions, and it describes the swings already printed, not what comes next. | possible three-wave downward correction, complete (atypical proportions) |
| Since the 50/200 cross | its 50-day average crossed below its 200-day average about 13 trading days ago — a "death cross", a bearish long-term signal | 13 sessions |
| Above the 200-day after a dip | it recently dipped to its 200-day average (the long-term trend line) and has since climbed back above it — now about 8.6% above | +8.6% |
| Trend strength (14-day ADX) | there is no clear trend right now — the price is choppy (ADX, a 0–100 trend-strength gauge, is 16, below the 25 that marks a real trend), though buyers have been pushing harder than sellers lately — pressure, not a trend | 15.9 |
Momentum
3
| 14-day RSI | momentum is neutral — its 14-day RSI (a 0–100 momentum gauge) is 63, neither overbought (above 70) nor oversold (below 30) | 62.7 |
|---|---|---|
| Position in its 14-day range | it is trading in the upper half of its 14-day range ($339.33 to $448.00) — its "stochastic" reading is 80 out of 100, where 0 would mean closing exactly at the 14-session low and 100 exactly at the high. This measures WHERE the price sits inside its recent range, which is a different question from the RSI beside it: RSI is a momentum gauge, measuring how FAST the price has been moving, so a stock can drift quietly to the bottom of its range with an ordinary RSI, or fall sharply and still sit in the middle. It has been slipping within that range over the last few sessions. | 79.7 |
| Since the MACD crossed zero | MACD, a trend-momentum gauge, is in positive territory (momentum leaning bullish) | 16 sessions |
Range
12
| 52-week high | its highest closing price over the past year (about 252 trading days) was $637.51 | $637.51 |
|---|---|---|
| From the 52-week high | it is 33.2% below its 52-week high (its highest price of the past year) | -33.2% |
| Above the 52-week low | it is 189.0% above its 52-week low (its lowest price of the past year) | +189.0% |
| Below the 52-week high | it is 33.2% below its highest point of the past year | 33.2% |
| Since a 20-day breakout | it made a new 20-day high about 2 trading days ago | 2 sessions |
| Since a 55-day breakout | it made a new 55-day high about 2 trading days ago | 2 sessions |
| All-time high | its highest closing price on record is $637.51 (set on 2026-06-03) | $637.51 |
| Given back of the 52-week move | over the past year its closes ranged ($151.45 to $627.00), and it has given back roughly a third of its rise from last year’s low — 42% of it. Chart-watchers call 61.8%-65% given back the "golden pocket" — for this company that is $317.89 to $333.11. It is watched widely enough that orders cluster there, which is the honest reason it matters; it is not a forecast. | 42.3% |
| From the all-time high | it is 33.2% below its all-time high | -33.2% |
| Nearest price level | it is sitting right on a support level at $425.67 — a price it turned at twice since 2026-06-17, most recently on 2026-08-04. Since 2024-10-08 it has 8 such levels below the current price and 2 above. Levels like these describe where the price has reversed or paused before; they are not a forecast of where it will go. | -0.1% |
| All-time low | its lowest closing price on record is $4.98 (set on 2009-02-24) | $4.98 |
| Above the all-time low | it is 8452.8% above its all-time low | +8,453% |
Volatility
5
| Band width vs its own 6 months | day-to-day price swings are wider than usual versus its own recent 6-month history (wider than about 75% of it) | 75th percentile |
|---|---|---|
| Typical daily range | in a typical session it travels about $24.23 between its high and its low — about 5.7% of its price. That is its "average true range" over the last 14 sessions, which also counts the distance from the previous close, so a day that opens well away from yesterday counts as the large move it was | $24.23 |
| Bollinger bands (20-day, ±2σ) | most of its recent trading has stayed between about $300.33 and $436.67 — the "Bollinger bands", a range drawn two standard deviations either side of its 20-day average price, which widens when the stock gets more volatile and narrows when it settles | $300.33 – $368.50 – $436.67 |
| Typical daily range (% of price) | its price moves about 5.7% in a typical session — about typical for the companies we cover. This is the average gap between a session's high and low over the last 14 sessions, counting overnight moves, expressed against the current price so it can be compared with companies trading at any price | 5.7% |
| Stretch from the 200-day average | it is trading 1.4 daily ranges above its 200-day average price (8.6% above it in plain percentage terms) — a way of asking how far it has stretched from its own average in units of how far it normally moves in a day, so a calm company and a jumpy one can be compared on the same scale | 1.4 daily ranges above its 200-day average |
Volume
1
| Volume vs its 30-day average | trading volume is about normal versus its 30-day average | 1.34× |
|---|
Analyst
2
| Change in the average price target | analysts have cut their average price target by 0.7% since the prior reading | -0.7% |
|---|---|---|
| Change in the consensus rating | the analyst consensus rating has improved toward "buy" since the prior reading | 0.04 toward buy |
Price gaps
3
| Gap at the open | it opened on 2026-10-08 2.3% below the previous session's close — an overnight gap, the part of the move that happened while the market was shut, and had not traded back through that level by the close | -2.3% |
|---|---|---|
| Open gap | it gapped 2.3% below the previous close today and has not traded back through the level it left behind at 446.45 — an "unfilled gap", which describes a price range no trade has since crossed and is not a forecast that it will be crossed | -2.3% |
| Gap filled | a 3.3% gap down opened on 2026-10-07 has been "filled" 1 session ago — price traded back through the level the gap left behind, and it closed again during the very session that opened it | 1 session ago |
Price streaks
1
| Closing streak | it closed lower in its latest session, after a session that did not close lower — a single down day rather than a run | 1 session down |
|---|
Relative strength
4
| vs market, 1 month | over the past 1 month this stock beat the market by 23.8 percentage points (the stock gained 24.8% while the market gained 1.0%) | +23.8% |
|---|---|---|
| vs market, 3 months | over the past 3 months this stock lagged the market by 7.2 percentage points (the stock lost 3.4% while the market gained 3.8%) | -7.2% |
| vs market, 6 months | over the past 6 months this stock lagged the market by 19.4 percentage points (the stock lost 1.9% while the market gained 17.5%) | -19.4% |
| vs market, 12 months | over the past 12 months this stock beat the market by 151.8 percentage points (the stock gained 166.8% while the market gained 15.0%) | +151.8% |
Signal agreement
2
| Bullish technical signals | 4 of the 9 technical signals we can compute for it are currently in a bullish state: trading above its 200-day average, a fresh 20-day high, MACD momentum is positive, trading above the Ichimoku cloud — these describe past price behaviour, not a forecast | 4 of 9 |
|---|---|---|
| Bearish technical signals | 2 of the 9 technical signals we can compute for it are currently in a bearish state: a "death cross" — its 50-day average is below its 200-day, lagging the market over 6 months — these describe past price behaviour, not a forecast | 2 of 9 |
Trend (Ichimoku cloud)
1
| Vs the Ichimoku cloud | trading 4.1% above the Ichimoku cloud — a band drawn from where its own highs and lows sat up to 2026-09-01 and projected forward over today's price, the side traders read as an established uptrend, with the band below acting as the level that would have to give way. The band itself is moderate, spanning 4.4% of the share price. | +4.1% |
|---|
Volume-weighted price
2
| Vs this year’s average price paid | the price is 8% above the average price paid so far this year, so the typical buyer over that stretch is showing a gain. That average is $395.45 — a volume-weighted average of daily closes over 190 sessions, not a true tick-by-tick VWAP. | +7.7% |
|---|---|---|
| Vs the average paid since it last reported | the price is 17% above the average price paid since it last reported on 2026-09-03 (its 10-Q), so the typical buyer over that stretch is showing a gain. That average is $363.21 — a volume-weighted average of daily closes over 25 sessions, not a true tick-by-tick VWAP. | +17.3% |
Price levels it has turned at before
CIEN last closed at $425.93 on 2026-10-08. Since 2024-10-08 it has turned at 8 prices below its last close and 2 above; the 3 nearest below and the 2 nearest above are listed, nearest first.
| Level | Side | Distance | Evidence |
|---|---|---|---|
| $425.67 | Support | 0.1% below the last close | turned there twice · 2026-06-17 to 2026-08-04 |
| $417.26 | Support | 2.0% below the last close | turned there twice · 2026-07-23 to 2026-08-27 |
| $459.37 | Resistance | 7.8% above the last close | turned there three times · 2026-04-15 to 2026-08-13 |
| $362.27 | Support | 14.9% below the last close | turned there four times · 2026-02-25 to 2026-08-24 |
| $496.77 | Resistance | 16.6% above the last close | turned there twice · 2026-05-19 to 2026-06-25 |
A level is a price this company reversed or paused at more than once — they describe past behaviour, not a forecast of where the price will go.
Wave structure
Its recent swings can be read as a three-part downward correction — the A-B-C shape chartists use for a pullback — now complete.
This labelling fails — stops being a possible reading at all — if it closes below $339.33.
It is the only labelling that fits these swings, though its proportions are not the textbook ones. It was chosen from 3 labellings that survived the rules, counting shorter readings of the same bars.
This reading has stood for 3 trading days, since 2026-10-06.
Read from daily closes as of 2026-10-08.
An Elliott-wave count describes the swings already printed and the level that would disprove it. It is not a forecast, a target, or advice.
Screens: Trading above the 200-day moving average · Recent death cross (50-day crossed below 200-day) · Tested and reclaimed 200-day support · Pulled back from the 12-month high · Broke out to a new 20-day high · trendless / choppy (low ADX) | Learn: moving average · golden cross · adx · rsi · breakout · fifty two week high low
Based on daily closing prices as of 2026-10-08. Describes past price behavior only — informational, not financial advice.
Analyst consensus
- Consensus ratingBuy (1.71 mean, 1=Strong Buy…5=Strong Sell) — 20 analysts
- Mean price target$512.99 range $347.00 – $660.00; median $536.50
Analyst estimates, as of 2026-10-07. These are third-party analyst opinions and price targets, aggregated — not a recommendation, prediction, or advice from stocks-llm. Informational only.
Analyst EPS estimate for CIEN
- Consensus EPS estimate$2.08 next reporting period, as of 2026-10-07
- Estimate change, 30 days+$0.3491 (+20.2%) from $1.73, on 2026-09-02, 35-day window
- Readings revised upward38% of 8 comparable readings
The consensus estimate for the next reporting period, and how it has moved between readings of that SAME period. A change is measured only between readings estimating one period — when a company reports, the consensus moves to the next quarter and the two numbers are not comparable. Informational only, not a forecast and not advice.
Key risks (from latest filing)
["Revenue and operating results are subject to significant and difficult-to-predict quarterly fluctuations.","Heavy reliance on a small number of customers for a significant portion of total revenue.","Supply chain constraints and dependency on long-term supplier agreements can impact delivery capabilities and inventory."]
What changed in the latest 10-Q
AI-assisted comparison of CIEN's 10-Q filed 2026-09-03 against the prior one filed 2026-06-04.
Management's Discussion & Analysis (MD&A)
- Added:
- Newer filing (filed 2026-09-03) updates Business Momentum to reference the first three quarters of fiscal 2026 instead of the first half.
- Newer filing adds sentence: 'As part of our efforts to secure both long-term supply and demand, we have, and are seeking to continue to, enter into multi-year supply agreements with certain of our suppliers, some of which involve firm purchase commitments and prepayment arrangements, and long-term purchase arrangements with customers.'
- Newer filing updates revenue comparison to third quarter: revenue increased by 37% to $1.7 billion in Q3 fiscal 2026 compared to $1.2 billion in Q3 fiscal 2025.
- Newer filing updates Gross Margin Dynamics to third quarter: gross margin increased to 45.4% in Q3 fiscal 2026, compared to 41.3% in Q3 fiscal 2025, and adds 'tariff refunds' as a factor.
- Newer filing updates Operating Expense: operating expense grew from $430 million in Q3 fiscal 2025 to $458 million in Q3 fiscal 2026; R&D investment of $237 million in Q3 fiscal 2026, an increase of 12% compared to Q3 fiscal 2025.
- Newer filing adds to Capital Allocation Strategy: 'During the third quarter of fiscal 2026, we completed a convertible note offering of $2.9 billion and immediately used the proceeds to repay our term loan as described in Note 13 to our Condensed Consolidated Financial Statements included in Item 1 of Part I of this report.'
- Newer filing updates Capital Allocation Strategy to first nine months figures: ended first nine months of fiscal 2026 with $2.8 billion of cash, cash equivalents, and investments; cash from operations increased to $684 million compared to $435 million for first nine months of fiscal 2025; invested $195 million in capital purchases; repurchased $338 million via share buyback program and $278 million for tax withholding associated with employee stock awards.
- Removed:
- Older filing (filed 2026-06-04) states Business Momentum for the first half of fiscal 2026 only.
- Older filing states revenue increased by 40% to $1.6 billion in Q2 fiscal 2026 compared to $1.1 billion in Q2 fiscal 2025.
- Older filing states gross margin increased to 44.0% in Q2 fiscal 2026 compared to 40.2% in Q2 fiscal 2025, with factors limited to cost reduction, pricing optimization, and product mix (no tariff refunds).
- Older filing states operating expense grew from $420 million in Q2 fiscal 2025 to $454 million in Q2 fiscal 2026; R&D investment of $238 million in Q2 fiscal 2026, an increase of 11%.
- Older filing states Capital Allocation Strategy with first half figures: ended first half of fiscal 2026 with $1.4 billion of cash, cash equivalents, and investments; cash from operations increased to $487 million compared to $261 million for first half of fiscal 2025; invested $115 million in capital purchases; repurchased $344 million total for share buybacks and tax withholding.
- Older filing includes a sentence about operating segments and Note 3 reference, plus Revenue discussion with approximately 40% ($444.9 million) Q2 increase and approximately 36% ($799.6 million) six-month increase, and an Operating Segment Revenue table, which are not present in the newer excerpt (newer excerpt ends at 'Our results of operations are pr').
- Reworded:
- Business Momentum period reference changed from 'first half of fiscal 2026' (older) to 'first three quarters of fiscal 2026' (newer).
- Revenue percentage and dollar amounts updated from Q2 fiscal 2026 comparisons (older) to Q3 fiscal 2026 comparisons (newer).
- Gross Margin Dynamics percentages updated from Q2 (older: 44.0% vs 40.2%) to Q3 (newer: 45.4% vs 41.3%), and 'tariff refunds' added as a contributing factor in newer filing.
- Operating expense and R&D figures updated from Q2 comparisons (older) to Q3 comparisons (newer), with R&D increase percentage changed from 11% to 12%.
- Capital Allocation Strategy measurements changed from first half to first nine months with updated cash, investment, operations, and repurchase figures.
- Newer filing separates share repurchases into two distinct amounts ($338 million buyback program and $278 million tax withholding), while older filing reports a combined $344 million for both purposes.
- Notes:
- The newer filing excerpt is truncated: it ends mid-sentence at 'Our results of operations are pr' and does not include the Operating Segments, Revenue, or Operating Segment Revenue sections that appear in the older filing. Comparisons for those sections cannot be made.
Risk Factors
- Added:
- The newer filing (filed 2026-09-03) discloses a Rule 10b5-1 trading arrangement adopted by Dino DiPerna on June 10, 2026, including duration until July 30, 2027, and details of shares to be sold.
- The newer filing (filed 2026-09-03) includes four new exhibits related to a 2031 Convertible Senior Note offering and credit agreement refinancing: Exhibits 4.1, 4.2, 10.1, 10.2, and 10.3, each incorporated by reference to a Form 8-K filed June 11, 2026.
- The newer filing (filed 2026-09-03) states that in connection with the 2031 Note offering the company repurchased 0.3 million shares for a total of $140.0 million.
- Removed:
- The older filing (filed 2026-06-04) disclosed a Rule 10b5-1 trading arrangement adopted by Marc D. Graff on March 25, 2026, with details of shares to be sold, which is not present in the newer filing.
- Reworded:
- The newer filing (filed 2026-09-03) describes repurchases 'during the third quarter of fiscal 2026' while the older filing (filed 2026-06-04) describes repurchases 'during the second quarter of fiscal 2026'.
- The newer filing (filed 2026-09-03) reports repurchase period data for May 3, 2026 to May 30, 2026; May 31, 2026 to June 27, 2026; and June 28, 2026 to August 1, 2026, while the older filing (filed 2026-06-04) reports data for February 1, 2026 to February 28, 2026; March 1, 2026 to March 28, 2026; and March 29, 2026 to May 2, 2026.
- The newer filing (filed 2026-09-03) reports total shares purchased of 356,413 and repurchases of $171.7 million with $335.0 million remaining under the repurchase authorization as of August 1, 2026, while the older filing (filed 2026-06-04) reports total shares purchased of 224,091 and repurchases of $83.1 million with $506.7 million remaining as of May 2, 2026.
- The newer filing (filed 2026-09-03) references 'Note 13 and 17' to the Condensed Consolidated Financial Statements, while the older filing (filed 2026-06-04) references 'Note 15'.
- The newer filing (filed 2026-09-03) describes the Rule 10b5-1 trading arrangement table as covering 'the third quarter of fiscal 2026', while the older filing (filed 2026-06-04) covers 'the second quarter of fiscal 2026'.
- The Risk Factors section itself is unchanged between the two filings.
- Notes:
- The provided texts include content beyond the Risk Factors section (Items 2 through 6), so differences include non-Risk Factors disclosures.
- As filed excerpts, the newer filing's exhibit list may be incomplete or truncated.
AI-assisted comparison of two SEC filing sections. It describes wording and theme changes only, makes no materiality, legal, or investment judgement, and is not financial advice. Informational only — not financial advice.
Insider activity (SEC Form 4)
0 open-market purchases and 22 open-market sales by insiders in the last 90 days, of which we have read Form 4 filings through 2026-10-04. The 5 days since 2026-10-04 have not been checked yet.
- Last 30 days · read to 2026-10-040 buys · 11 sells ($7M) — 10 selling insiders
- Last 90 days · read to 2026-10-040 buys · 22 sells ($17M) — 10 selling insiders
- Last 180 days · read to 2026-10-040 buys · 41 sells ($36M) — 10 selling insiders
Activity heuristic: net selling (a transparent product heuristic from the counts above, not a prediction or advice)
Most recent open-market transaction: 2026-10-01. Based on Form 4 filings read through 2026-10-04; anything filed since is not yet included.
View full insider trading history → View SEC Form 3/4/5 filingsAsk about CIEN's insider activity →
Only open-market purchases (SEC code P) and sales (code S) are counted here. Option exercises, vesting/awards, gifts, and shares withheld for taxes are excluded — they are compensation or mechanical, not open-market conviction. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan) and are not necessarily bearish; open-market buying is not a recommendation to buy. Informational only — not financial advice.
U.S. House trading disclosures
U.S. House members publicly disclose their own, their spouse's, and dependent children's stock transactions under the STOCK Act. We hold 7 matched disclosures for CIEN from U.S. House Clerk Periodic Transaction Report filings.
U.S. House trading disclosures →Institutional ownership (13F)
6 institutional 13F filers reported holding CIEN as of 2026-06-30 (quarter-end position, filed within 45 days).
- Distinct 13F filers 6
- Reported shares held 41,455,550
- Reported value $20,336,434,599
reported quarterly holdings change (2026-03-31 → 2026-06-30): 0 new, 3 increased, 3 decreased, 0 exited. Change counts cover only managers that filed 13F reports in BOTH quarters, derived between two quarter-end snapshots — not same-day trades; a single manager is never said to have "bought" or "sold".
Institutional holdings are quarter-end long positions reported on SEC Form 13F-HR, filed up to 45 days after the quarter ends — they are delayed, are not real-time trades, exclude short positions and most non-US securities, and are not investment advice. Any increase/decrease is a reported change between two quarterly snapshots, not a same-day purchase or sale. These are quarter-end snapshots from the 13F filings on SEC EDGAR, filed within 45 days — not real-time, and any change is a difference between two quarterly reports, not a same-day trade. Informational only — not financial advice.
Ask about CIEN's institutional holders → See what each manager we track holds →
Short interest (FINRA)
CIEN had 3,590,902 shares of reported short interest as of the 2026-09-15 FINRA settlement date (delayed, bi-monthly; not real-time).
CIEN had 2.53% of its shares outstanding sold short as of the 2026-09-15 FINRA settlement date (percent of FLOAT would be higher — float is not disclosed in the source). FINRA reported 1.17 days to cover at the same settlement.
- Reported short interest (shares) 3,590,902
- Short interest (% of shares outstanding) 2.53%
- Prior settlement (shares) 3,345,857
- Reported change 7.32%
- Days to cover (reported) 1.17
Reported to FINRA as of the 2026-09-15 settlement date. Short interest is reported to FINRA and published on a delayed, bi-monthly schedule (as of a settlement date, disseminated roughly eight business days later) — it is NOT real-time, does not cover every venue or all US trading, and is not a short-squeeze prediction or investment advice. Days-to-cover is the value FINRA reports; percent of float is not shown because the source file carries no share-count denominator — where a percent appears it is of shares OUTSTANDING, the larger base, and is therefore a floor on percent of float. Informational only — not financial advice.
Competitors & peers
- Cisco Systems (CSCO)
- Nokia (NOK)
- Juniper Networks (JNPR)
- Huawei Technologies
- Infinera (INFN)
- ADVA Optical Networking
- Ciena (CIEN) competitors often include various specialized optical and routing equipment manufacturers globally.
AI-enriched competitor set. Linked names are companies covered by stocks-llm; other named peers are shown for reference only.
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Frequently asked questions
What does Ciena (CIEN) do?
Ciena is a network technology company that provides hardware, software, and services to global network operators. Its solutions, which include optical networking and routing and switching platforms, are designed to increase network capacity, enable service delivery, and support high-bandwidth applications such as AI, cloud services, video, and data. The company also offers software for network automation and lifecycle management, along with comprehensive professional services.
What sector is Ciena (CIEN) in?
Ciena (CIEN) is classified in the Information Technology sector. Its industry is optical networking and telecommunications equipment. It trades on NYSE.
Who are Ciena's (CIEN) competitors?
Notable peers of Ciena (CIEN) include Cisco Systems, Nokia, Juniper Networks, Huawei Technologies and Infinera. This peer set is informational only — not financial advice.
Has there been recent U.S. House stock trading in CIEN?
Yes — we hold 7 matched STOCK Act disclosures for CIEN from U.S. House Clerk Periodic Transaction Report filings. These are legally-required disclosures (often filed 30–45 days after the trade), may belong to a U.S. House member, their spouse, or a dependent child, and are not an indicator of company performance or investment advice.
Is Ciena (CIEN) overbought or oversold right now?
Ciena (CIEN) is currently neither overbought nor oversold — its 14-day RSI (a 0–100 momentum gauge) is 63, in the neutral middle (as of 2026-10-08). RSI describes recent price momentum, not a forecast — informational only, not financial advice.
Where does stocks-llm's data on CIEN come from?
Fundamentals come from SEC XBRL company filings for the figures marked with a fiscal year, and market data, as of 2026-09-03 for the rest; prices are market data, as of 2026-09-03; company filings and profile facts come from SEC EDGAR. All figures are delayed daily-close data shown with their as-of date — informational only, not financial advice.
Fundamentals: SEC XBRL company filings for the figures marked with a fiscal year, and market data, as of 2026-09-03 for the rest. Filings: SEC EDGAR. Prices are delayed daily-close data.
Last updated 2026-10-08.
Informational only — NOT financial advice. All figures are delayed daily-close data from SEC EDGAR & market data, shown with their as-of date.