Ciena (CIEN)
Ciena on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, financials, earnings dates and insider trades. Listed on NYSE, classified by the SEC as telephone & telegraph apparatus.
4.0M
Short interest
settlement 2026-10-15
1.2
Days to cover
-0.3 days vs prior
38.0%
Short share of volume
2026-11-02
90
Fails to deliver
settlement 2026-10-13
Thu 10 Dec
Next earnings
estimated date
-$16.9M
Insider flow, 90 days
0 buys, 22 sells
As of 2026-11-02.
Short interest
FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSONAs of 15 October 2026, short interest in CIEN is 3,984,850 shares, up 393,948 shares over the last month. Over the last 48 readings it ranged from 2,921,400 shares (14 August 2026) to 7,308,972 shares (15 December 2025). At the reported average volume of 3.4M shares a day that is 1.2 days to cover.
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| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 3,984,850 | +3.0% | 3,426,823 | 1.16 |
| 2026-09-30 | 3,868,972 | +7.7% | 2,681,505 | 1.44 |
| 2026-09-15 | 3,590,902 | +7.3% | 3,059,545 | 1.17 |
| 2026-08-31 | 3,345,857 | +14.5% | 1,684,576 | 1.99 |
| 2026-08-14 | 2,921,400 | -21.3% | 2,130,578 | 1.37 |
| 2026-07-31 | 3,711,106 | -7.1% | 2,296,038 | 1.62 |
| 2026-07-15 | 3,993,188 | +3.6% | 1,662,231 | 2.40 |
| 2026-06-30 | 3,853,439 | -19.1% | 4,068,949 | 1.00 |
| 2026-06-15 | 4,760,443 | +5.7% | 4,279,264 | 1.11 |
| 2026-05-29 | 4,505,490 | -0.5% | 2,093,785 | 2.15 |
| 2026-05-15 | 4,529,072 | +3.8% | 1,878,224 | 2.41 |
| 2026-04-30 | 4,365,229 | -7.0% | 2,159,596 | 2.02 |
| 2026-04-15 | 4,693,751 | -21.5% | 2,961,166 | 1.59 |
| 2026-03-31 | 5,977,920 | +18.5% | 3,607,944 | 1.66 |
| 2026-03-13 | 5,044,648 | -19.4% | 3,324,794 | 1.52 |
| 2026-02-27 | 6,258,043 | +11.4% | 2,426,111 | 2.58 |
| 2026-02-13 | 5,619,035 | +32.4% | 6,414,906 | 1.00 |
| 2026-01-30 | 4,244,185 | -28.7% | 2,260,600 | 1.88 |
| 2026-01-15 | 5,952,010 | -8.4% | 2,668,792 | 2.23 |
| 2025-12-31 | 6,498,989 | -11.1% | 2,105,586 | 3.09 |
| 2025-12-15 | 7,308,972 | +14.1% | 3,638,124 | 2.01 |
| 2025-11-28 | 6,406,321 | +9.8% | 4,061,820 | 1.58 |
| 2025-11-14 | 5,836,886 | +42.4% | 3,166,244 | 1.84 |
| 2025-10-31 | 4,098,820 | -7.4% | 2,253,720 | 1.82 |
| 2025-10-15 | 4,426,005 | -8.8% | 2,482,372 | 1.78 |
| 2025-09-30 | 4,852,614 | +21.0% | 2,740,289 | 1.77 |
| 2025-09-15 | 4,011,138 | -15.7% | 4,184,352 | 1.00 |
| 2025-08-29 | 4,759,717 | -12.6% | 1,755,833 | 2.71 |
| 2025-08-15 | 5,442,615 | -5.3% | 1,654,145 | 3.29 |
| 2025-07-31 | 5,744,440 | +5.7% | 1,667,472 | 3.44 |
| 2025-07-15 | 5,434,389 | -12.1% | 2,325,383 | 2.34 |
| 2025-06-30 | 6,181,305 | +26.9% | 2,291,933 | 2.70 |
| 2025-06-13 | 4,870,918 | +29.6% | 3,825,720 | 1.27 |
| 2025-05-30 | 3,757,963 | -3.6% | 1,175,887 | 3.20 |
| 2025-05-15 | 3,900,086 | -7.2% | 1,621,644 | 2.41 |
| 2025-04-30 | 4,200,813 | -6.4% | 1,526,524 | 2.75 |
| 2025-04-15 | 4,489,438 | +13.4% | 2,667,864 | 1.68 |
| 2025-03-31 | 3,959,977 | -5.7% | 2,202,609 | 1.80 |
| 2025-03-14 | 4,200,059 | +11.7% | 3,725,052 | 1.13 |
| 2025-02-28 | 3,759,510 | -4.6% | 2,383,873 | 1.58 |
| 2025-02-14 | 3,939,701 | -19.4% | 1,940,943 | 2.03 |
| 2025-01-31 | 4,890,274 | -11.3% | 3,531,910 | 1.38 |
| 2025-01-15 | 5,513,687 | +19.4% | 1,771,350 | 3.11 |
| 2024-12-31 | 4,618,108 | -25.0% | 1,946,626 | 2.37 |
| 2024-12-13 | 6,159,539 | -1.6% | 3,397,669 | 1.81 |
| 2024-11-29 | 6,256,998 | +0.3% | 1,165,603 | 5.37 |
| 2024-11-15 | 6,241,471 | +3.5% | 1,670,749 | 3.74 |
| 2024-10-31 | 6,032,453 | -1.3% | 1,603,211 | 3.76 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 2 November 2026, the short share of CIEN volume is 38.0%, down 14.8 points over the last five sessions. Over the last 30 readings it ranged from 36.1% (15 October 2026) to 63.8% (29 October 2026). The latest reading sits at the bottom of that range. The latest reading is 12.4 points below the 30-session average of 50.4%, on 2.1M shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-11-02 | 783K | 2.1M | 38.0% | 9,741 |
| 2026-10-30 | 667K | 1.4M | 47.8% | 1,218 |
| 2026-10-29 | 1.0M | 1.6M | 63.8% | 682 |
| 2026-10-28 | 830K | 1.6M | 52.5% | 5,144 |
| 2026-10-27 | 907K | 1.6M | 57.4% | 1,289 |
| 2026-10-26 | 813K | 1.5M | 52.8% | 2,179 |
| 2026-10-23 | 550K | 1.0M | 52.7% | 37,957 |
| 2026-10-22 | 872K | 2.0M | 44.2% | 48,848 |
| 2026-10-21 | 888K | 1.6M | 54.6% | 66 |
| 2026-10-20 | 496K | 961K | 51.6% | 486 |
| 2026-10-19 | 817K | 1.6M | 49.9% | 191 |
| 2026-10-16 | 684K | 1.8M | 38.3% | 5,584 |
| 2026-10-15 | 655K | 1.8M | 36.1% | 62,573 |
| 2026-10-14 | 731K | 1.6M | 44.7% | 11,716 |
| 2026-10-13 | 674K | 1.5M | 45.1% | 53,568 |
| 2026-10-12 | 933K | 1.8M | 52.5% | 40,629 |
| 2026-10-09 | 1.2M | 2.1M | 57.0% | 361 |
| 2026-10-08 | 1.2M | 1.9M | 61.9% | 5,192 |
| 2026-10-07 | 927K | 1.8M | 52.3% | 2,335 |
| 2026-10-06 | 1.9M | 3.7M | 52.2% | 3,126 |
| 2026-10-05 | 841K | 1.5M | 54.4% | 68 |
| 2026-10-02 | 690K | 1.3M | 53.3% | 1,295 |
| 2026-10-01 | 566K | 1.2M | 48.4% | 2,013 |
| 2026-09-30 | 532K | 1.3M | 41.2% | 962 |
| 2026-09-29 | 545K | 1.1M | 50.1% | 106 |
| 2026-09-28 | 380K | 820K | 46.3% | 212 |
| 2026-09-25 | 395K | 787K | 50.1% | 1,632 |
| 2026-09-24 | 353K | 608K | 58.1% | 44 |
| 2026-09-23 | 461K | 905K | 51.0% | 12 |
| 2026-09-22 | 558K | 1.0M | 53.1% | 665 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 13 October 2026, the fails-to-deliver balance in CIEN is 90 shares, down 13,634 shares over the last settlement date. Over the last 30 readings it ranged from 4 shares (10 August 2026) to 324,965 shares (29 June 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-10-13 | 90 | $405.01 | $36K |
| 2026-10-07 | 13,724 | $443.65 | $6.1M |
| 2026-10-05 | 1,055 | $391.34 | $413K |
| 2026-10-02 | 10 | $379.14 | $4K |
| 2026-09-15 | 901 | $319.64 | $288K |
| 2026-09-10 | 1,210 | $338.00 | $409K |
| 2026-09-08 | 39,058 | $321.00 | $12.5M |
| 2026-09-04 | 5,416 | $317.46 | $1.7M |
| 2026-09-03 | 6,491 | $354.16 | $2.3M |
| 2026-09-02 | 10,216 | $360.33 | $3.7M |
| 2026-08-21 | 487 | $392.48 | $191K |
| 2026-08-10 | 4 | $412.39 | $2K |
| 2026-08-07 | 2,070 | $403.76 | $836K |
| 2026-08-06 | 75 | $408.83 | $31K |
| 2026-08-03 | 1,200 | $377.05 | $452K |
| 2026-07-21 | 418 | $378.77 | $158K |
| 2026-07-17 | 1,486 | $388.81 | $578K |
| 2026-07-16 | 59 | $418.46 | $25K |
| 2026-07-09 | 5 | $440.97 | $2K |
| 2026-07-08 | 5,443 | $418.91 | $2.3M |
| 2026-07-07 | 49,923 | $433.83 | $21.7M |
| 2026-06-30 | 23 | $478.93 | $11K |
| 2026-06-29 | 324,965 | $479.50 | $155.8M |
| 2026-06-23 | 131 | $460.33 | $60K |
| 2026-06-18 | 1,839 | $436.72 | $803K |
| 2026-06-15 | 24,805 | $445.98 | $11.1M |
| 2026-06-12 | 27,580 | $445.22 | $12.3M |
| 2026-06-11 | 24,956 | $434.65 | $10.8M |
| 2026-06-10 | 5,454 | $439.34 | $2.4M |
| 2026-06-09 | 3,059 | $466.67 | $1.4M |
Insider trades
SEC Form 4, newest first. JSONInsiders at CIEN reported 22 open-market sells worth $16.9M in the last 90 days and no open-market buys. Latest filing: Gage Brodie (EVP & Chief Product & Tech) on 2026-10-15.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-10-15 | Gage Brodie | EVP & Chief Product & Tech | Sell | 1K | $344.08 | $413K | 34K |
| 2026-10-15 | DiPerna Dino | EVP & Chief R&D Officer | Sell | 445 | $350.00 | $156K | 36K |
| 2026-10-15 | DiPerna Dino | EVP & Chief R&D Officer | Sell | 445 | $344.08 | $153K | 37K |
| 2026-10-15 | Rothenstein David M | EVP & Chief Strategy Officer | Sell | 3K | $348.06 | $870K | 173K |
| 2026-10-15 | SMITH GARY B | President & CEO | Sell | 3K | $348.02 | $1.0M | 225K |
| 2026-10-01 | SMITH GARY B | President & CEO | Sell | 3K | $369.66 | $1.1M | 228K |
| 2026-10-01 | Graff Marc D. | EVP & Chief Financial Officer | Sell | 97 | $355.19 | $34K | 107K |
| 2026-10-01 | Kosaraju Sheela | EVP & Chief Legal Officer | Sell | 2K | $355.19 | $746K | 84K |
| 2026-10-01 | Phipps Jason | EVP & Chief Customer Officer | Sell | 3K | $355.19 | $934K | 57K |
| 2026-09-25 | Cumello Joseph | EVP & General Mgr. | Sell | 2K | $358.52 | $569K | 40K |
| 2026-09-24 | Claflin Bruce L. | Director | Sell | 3K | $355.91 | $1.0M | 8K |
| 2026-09-24 | NEVENS THOMAS MICHAEL | Director | Gift | 3K | price not stated in the filing | not stated | 3K |
| 2026-09-23 | NEVENS THOMAS MICHAEL | Director | Sell | 4K | $359.04 | $1.3M | 6K |
| 2026-09-20 | Cumello Joseph | EVP & General Mgr. | Tax withholding | 331 | $348.80 | $115K | 41K |
| 2026-09-20 | Cumello Joseph | EVP & General Mgr. | Tax withholding | 180 | $348.80 | $63K | 41K |
| 2026-09-20 | Cumello Joseph | EVP & General Mgr. | Tax withholding | 582 | $348.80 | $203K | 42K |
| 2026-09-20 | Cumello Joseph | EVP & General Mgr. | Tax withholding | 182 | $348.80 | $63K | 42K |
| 2026-09-20 | Cumello Joseph | EVP & General Mgr. | Tax withholding | 441 | $348.80 | $154K | 42K |
| 2026-09-20 | Kosaraju Sheela | EVP & Chief Legal Officer | Tax withholding | 189 | $348.80 | $66K | 86K |
| 2026-09-20 | Kosaraju Sheela | EVP & Chief Legal Officer | Tax withholding | 330 | $348.80 | $115K | 86K |
| 2026-09-20 | Kosaraju Sheela | EVP & Chief Legal Officer | Tax withholding | 549 | $348.80 | $191K | 87K |
| 2026-09-20 | Kosaraju Sheela | EVP & Chief Legal Officer | Tax withholding | 691 | $348.80 | $241K | 87K |
| 2026-09-20 | Kosaraju Sheela | EVP & Chief Legal Officer | Tax withholding | 156 | $348.80 | $54K | 88K |
| 2026-09-20 | Phipps Jason | EVP & Chief Customer Officer | Tax withholding | 268 | $348.80 | $93K | 60K |
| 2026-09-20 | Phipps Jason | EVP & Chief Customer Officer | Tax withholding | 503 | $348.80 | $175K | 60K |
| 2026-09-20 | Phipps Jason | EVP & Chief Customer Officer | Tax withholding | 859 | $348.80 | $300K | 61K |
| 2026-09-20 | Phipps Jason | EVP & Chief Customer Officer | Tax withholding | 735 | $348.80 | $256K | 62K |
| 2026-09-20 | Rothenstein David M | EVP & Chief Strategy Officer | Tax withholding | 220 | $348.80 | $77K | 175K |
| 2026-09-20 | Rothenstein David M | EVP & Chief Strategy Officer | Tax withholding | 436 | $348.80 | $152K | 176K |
| 2026-09-20 | Rothenstein David M | EVP & Chief Strategy Officer | Tax withholding | 811 | $348.80 | $283K | 176K |
| 2026-09-20 | Rothenstein David M | EVP & Chief Strategy Officer | Tax withholding | 204 | $348.80 | $71K | 177K |
| 2026-09-20 | Rothenstein David M | EVP & Chief Strategy Officer | Tax withholding | 679 | $348.80 | $237K | 177K |
| 2026-09-20 | SMITH GARY B | President & CEO | Tax withholding | 937 | $348.80 | $327K | 231K |
| 2026-09-20 | SMITH GARY B | President & CEO | Tax withholding | 2K | $348.80 | $608K | 232K |
| 2026-09-20 | SMITH GARY B | President & CEO | Tax withholding | 3K | $348.80 | $1.1M | 234K |
| 2026-09-20 | SMITH GARY B | President & CEO | Tax withholding | 3K | $348.80 | $1.0M | 237K |
| 2026-09-20 | Gage Brodie | EVP & Chief Product & | Tax withholding | 231 | $348.80 | $81K | 35K |
| 2026-09-20 | Gage Brodie | EVP & Chief Product & | Tax withholding | 388 | $348.80 | $135K | 36K |
| 2026-09-20 | Gage Brodie | EVP & Chief Product & | Tax withholding | 669 | $348.80 | $233K | 36K |
| 2026-09-20 | Gage Brodie | EVP & Chief Product & | Tax withholding | 442 | $348.80 | $154K | 37K |
| 2026-09-20 | Gage Brodie | EVP & Chief Product & | Tax withholding | 204 | $348.80 | $71K | 37K |
| 2026-09-20 | Hoffman Grant | EVP & Chief Supply | Tax withholding | 170 | $348.80 | $59K | 6K |
| 2026-09-20 | DiPerna Dino | EVP & Chief R&D Officer | Tax withholding | 247 | $348.80 | $86K | 37K |
| 2026-09-20 | DiPerna Dino | EVP & Chief R&D Officer | Tax withholding | 428 | $348.80 | $149K | 37K |
| 2026-09-20 | DiPerna Dino | EVP & Chief R&D Officer | Tax withholding | 730 | $348.80 | $255K | 38K |
| 2026-09-20 | DiPerna Dino | EVP & Chief R&D Officer | Tax withholding | 444 | $348.80 | $155K | 38K |
| 2026-09-20 | DiPerna Dino | EVP & Chief R&D Officer | Tax withholding | 204 | $348.80 | $71K | 39K |
| 2026-09-20 | Graff Marc D. | EVP & Chief Financial Officer | Tax withholding | 286 | $348.80 | $100K | 107K |
| 2026-09-16 | DiPerna Dino | EVP & Chief R&D Officer | Sell | 249 | $350.00 | $87K | 39K |
| 2026-09-15 | Gage Brodie | EVP & Chief Product & | Sell | 1K | $324.86 | $390K | 37K |
| 2026-09-15 | DiPerna Dino | EVP & Chief R&D Officer | Sell | 249 | $324.86 | $81K | 39K |
| 2026-09-15 | Rothenstein David M | EVP & Chief Strategy Officer | Sell | 3K | $330.48 | $826K | 178K |
| 2026-09-15 | SMITH GARY B | President & CEO | Sell | 3K | $330.18 | $975K | 240K |
| 2026-09-01 | SMITH GARY B | President, CEO | Sell | 3K | $362.90 | $1.1M | 243K |
| 2026-08-17 | Gage Brodie | SVP Global Products & Supply | Sell | 1K | $439.24 | $527K | 38K |
| 2026-08-17 | SMITH GARY B | President, CEO | Sell | 3K | $447.78 | $1.3M | 246K |
| 2026-08-14 | Graff Marc D. | SVP & Chief Financial Officer | Sell | 5K | $430.72 | $2.2M | 108K |
| 2026-08-14 | Rothenstein David M | SVP and Chief Strategy Officer | Sell | 3K | $438.10 | $1.1M | 180K |
| 2026-08-03 | SMITH GARY B | President, CEO | Sell | 3K | $379.81 | $1.1M | 249K |
| 2026-08-01 | Graff Marc D. | SVP & Chief Financial Officer | Tax withholding | 14K | $377.05 | $5.4M | 113K |
| 2026-07-15 | DiPerna Dino | SVP Global R&D | Sell | 391 | $449.15 | $176K | 40K |
| 2026-07-15 | Gage Brodie | SVP Global Products & Supply | Sell | 1K | $449.15 | $539K | 40K |
| 2026-07-15 | DiPerna Dino | SVP Global R&D | Sell | 391 | $449.15 | $176K | 40K |
| 2026-07-15 | Rothenstein David M | SVP and Chief Strategy Officer | Sell | 3K | $420.91 | $1.1M | 183K |
| 2026-07-15 | SMITH GARY B | President, CEO | Sell | 3K | $421.10 | $1.2M | 252K |
| 2026-07-01 | Graff Marc D. | SVP & Chief Financial Officer | Sell | 126 | $466.20 | $59K | 127K |
| 2026-07-01 | Kosaraju Sheela | SVP and General Counsel | Sell | 2K | $466.20 | $938K | 88K |
| 2026-07-01 | Phipps Jason | SVP Global Sales and Marketing | Sell | 3K | $466.20 | $1.2M | 62K |
| 2026-07-01 | SMITH GARY B | President, CEO | Sell | 3K | $468.83 | $1.4M | 255K |
| 2026-06-26 | Cumello Joseph | SVP, General Mgr. Blue Planet | Sell | 2K | $466.33 | $740K | 43K |
| 2026-06-24 | Graff Marc D. | SVP & Chief Financial Officer | Sell | 126 | $449.36 | $57K | 127K |
| 2026-06-22 | Hoffman Grant | SVP Chief Supply Chain Officer | Grant | 7K | $0.00 | $0 | 7K |
| 2026-06-20 | Cumello Joseph | SVP, General Mgr. Blue Planet | Tax withholding | 180 | $428.22 | $77K | 44K |
| 2026-06-20 | Cumello Joseph | SVP, General Mgr. Blue Planet | Tax withholding | 582 | $428.22 | $249K | 45K |
| 2026-06-20 | Cumello Joseph | SVP, General Mgr. Blue Planet | Tax withholding | 332 | $428.22 | $142K | 45K |
| 2026-06-20 | Cumello Joseph | SVP, General Mgr. Blue Planet | Tax withholding | 182 | $428.22 | $78K | 46K |
| 2026-06-20 | Cumello Joseph | SVP, General Mgr. Blue Planet | Tax withholding | 441 | $428.22 | $189K | 46K |
| 2026-06-20 | DiPerna Dino | SVP Global R&D | Tax withholding | 444 | $428.22 | $190K | 42K |
| 2026-06-20 | DiPerna Dino | SVP Global R&D | Tax withholding | 730 | $428.22 | $313K | 41K |
| 2026-06-20 | DiPerna Dino | SVP Global R&D | Tax withholding | 428 | $428.22 | $183K | 41K |
| 2026-06-20 | DiPerna Dino | SVP Global R&D | Tax withholding | 248 | $428.22 | $106K | 40K |
| 2026-06-20 | DiPerna Dino | SVP Global R&D | Tax withholding | 204 | $428.22 | $87K | 42K |
| 2026-06-20 | Gage Brodie | SVP Global Products & Supply | Tax withholding | 669 | $428.22 | $286K | 41K |
| 2026-06-20 | Gage Brodie | SVP Global Products & Supply | Tax withholding | 442 | $428.22 | $189K | 42K |
| 2026-06-20 | Gage Brodie | SVP Global Products & Supply | Tax withholding | 204 | $428.22 | $87K | 43K |
| 2026-06-20 | Gage Brodie | SVP Global Products & Supply | Tax withholding | 388 | $428.22 | $166K | 41K |
| 2026-06-20 | Gage Brodie | SVP Global Products & Supply | Tax withholding | 231 | $428.22 | $99K | 41K |
| 2026-06-20 | Kosaraju Sheela | SVP and General Counsel | Tax withholding | 728 | $428.22 | $312K | 91K |
| 2026-06-20 | Kosaraju Sheela | SVP and General Counsel | Tax withholding | 164 | $428.22 | $70K | 92K |
| 2026-06-20 | Kosaraju Sheela | SVP and General Counsel | Tax withholding | 198 | $428.22 | $85K | 90K |
| 2026-06-20 | Kosaraju Sheela | SVP and General Counsel | Tax withholding | 345 | $428.22 | $148K | 90K |
| 2026-06-20 | Kosaraju Sheela | SVP and General Counsel | Tax withholding | 578 | $428.22 | $248K | 91K |
| 2026-06-20 | Phipps Jason | SVP Global Sales and Marketing | Tax withholding | 735 | $428.22 | $315K | 67K |
| 2026-06-20 | Phipps Jason | SVP Global Sales and Marketing | Tax withholding | 859 | $428.22 | $368K | 66K |
| 2026-06-20 | Phipps Jason | SVP Global Sales and Marketing | Tax withholding | 268 | $428.22 | $115K | 65K |
| 2026-06-20 | Phipps Jason | SVP Global Sales and Marketing | Tax withholding | 504 | $428.22 | $216K | 65K |
| 2026-06-20 | Rothenstein David M | SVP and Chief Strategy Officer | Tax withholding | 436 | $428.22 | $187K | 185K |
| 2026-06-20 | Rothenstein David M | SVP and Chief Strategy Officer | Tax withholding | 679 | $428.22 | $291K | 187K |
| 2026-06-20 | Rothenstein David M | SVP and Chief Strategy Officer | Tax withholding | 204 | $428.22 | $87K | 187K |
| 2026-06-20 | Rothenstein David M | SVP and Chief Strategy Officer | Tax withholding | 811 | $428.22 | $347K | 186K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.
Planned sales (Form 144)
Newest first. JSON50 Form 144 notices on file for CIEN worth $53.6M at the prices reported; 15 in the last 90 days worth $10.4M. Latest: DAVID ROTHENSTEIN filed on 2026-10-15 to sell 2,500 shares ($899K) from 2026-10-15.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-10-15 | DAVID ROTHENSTEINOfficer | 3K | $899K | 0.002% | 2026-10-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-10-15 | DINO DIPERNAOfficer | 890 | $309K | 0.001% | 2026-10-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-10-15 | BRODIE GAGEOfficer | 1K | $413K | 0.001% | 2026-10-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-10-01 | SHEELA KOSARAJUOfficer | 2K | $746K | 0.001% | 2026-10-01 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-10-01 | JASON PHIPPSOfficer | 3K | $934K | 0.002% | 2026-10-01 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-10-01 | MARC GRAFFOfficer | 97 | $34K | 0.000% | 2026-10-01 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-25 | JOSEPH CUMELLOOfficer | 2K | $568K | 0.001% | 2026-09-25 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-23 | THOMAS MICHAEL NEVENSDirector | 4K | $1.3M | 0.003% | 2026-09-23 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-16 | DINO DIPERNAOfficer | 249 | $87K | 0.000% | 2026-09-16 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-15 | DAVID ROTHENSTEINOfficer | 3K | $799K | 0.002% | 2026-09-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-15 | BRODIE GAGEOfficer | 1K | $390K | 0.001% | 2026-09-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-15 | DINO DIPERNAOfficer | 249 | $81K | 0.000% | 2026-09-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-17 | BRODIE GAGEOfficer | 1K | $527K | 0.001% | 2026-08-17 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-14 | DAVID ROTHENSTEINOfficer | 3K | $1.1M | 0.002% | 2026-08-14 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-14 | MARC GRAFFOfficer | 5K | $2.2M | 0.004% | 2026-08-14 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-07-15 | DAVID ROTHENSTEINOfficer | 3K | $1.1M | 0.002% | 2026-07-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-07-15 | BRODIE GAGEOfficer | 1K | $539K | 0.001% | 2026-07-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-07-15 | DINO DIPERNAOfficer | 782 | $351K | 0.001% | 2026-07-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-07-01 | MARC GRAFFOfficer | 126 | $62K | 0.000% | 2026-07-01 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-07-01 | SHEELA KOSARAJUOfficer | 2K | $938K | 0.001% | 2026-07-01 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-07-01 | JASON PHIPPSOfficer | 3K | $1.2M | 0.002% | 2026-07-01 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-26 | JOSEPH CUMELLOOfficer | 2K | $769K | 0.001% | 2026-06-26 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-24 | MARC GRAFFOfficer | 126 | $58K | 0.000% | 2026-06-24 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-15 | DAVID ROTHENSTEINOfficer | 3K | $1.1M | 0.002% | 2026-06-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-15 | BRODIE GAGEOfficer | 1K | $559K | 0.001% | 2026-06-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-15 | DAVID ROTHENSTEINOfficer | 3K | $1.5M | 0.002% | 2026-05-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-15 | BRODIE GAGEOfficer | 1K | $685K | 0.001% | 2026-05-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-04-15 | DAVID ROTHENSTEINOfficer | 3K | $1.2M | 0.002% | 2026-04-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-04-15 | BRODIE GAGEOfficer | 1K | $566K | 0.001% | 2026-04-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-04-15 | DINO DIPERNAOfficer | 3K | $1.3M | 0.002% | 2026-04-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-04-01 | JASON PHIPPSOfficer | 22K | $9.0M | 0.016% | 2026-04-01 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-04-01 | SHEELA KOSARAJUOfficer | 2K | $808K | 0.001% | 2026-04-01 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-03-27 | JOSEPH CUMELLOOfficer | 2K | $688K | 0.001% | 2026-03-27 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-03-24 | BRODIE GAGEOfficer | 5K | $2.0M | 0.004% | 2026-03-24 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-03-16 | DAVID ROTHENSTEINOfficer | 3K | $843K | 0.002% | 2026-03-16 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-02-17 | DAVID M ROTHENSTEINOfficer | 3K | $760K | 0.002% | 2026-02-17 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-01-15 | SHEELA KOSARAJUOfficer | 382 | $94K | 0.000% | 2026-01-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-01-15 | DINO DIPERNAOfficer | 5K | $1.2M | 0.004% | 2026-01-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-01-15 | JASON PHIPPSOfficer | 21K | $5.3M | 0.015% | 2026-01-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-01-12 | JOSEPH CUMELLOOfficer | 12K | $2.8M | 0.008% | 2026-01-12 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-01-12 | PATRICK GALLAGHERDirector | 12K | $2.6M | 0.008% | 2026-01-12 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-01-09 | DAVID M ROTHENSTEINOfficer | 3K | $563K | 0.002% | 2026-01-09 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-01-02 | SHEELA KOSARAJUOfficer | 2K | $421K | 0.001% | 2026-01-02 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-12-15 | DAVID ROTHENSTEINOfficer | 3K | $546K | 0.002% | 2025-12-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-12-15 | T MICHAEL NEVENSDirector | 9K | $1.9M | 0.006% | 2025-12-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-12-15 | BRODIE GAGEOfficer | 550 | $121K | 0.000% | 2025-12-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-11-17 | DAVID ROTHENSTEINOfficer | 3K | $479K | 0.002% | 2025-11-17 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-11-17 | DINO DIPERNAOfficer | 2K | $474K | 0.002% | 2025-11-17 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-11-17 | BRODIE GAGEOfficer | 111 | $21K | 0.000% | 2025-11-17 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-10-15 | DAVID ROTHENSTEINOfficer | 3K | $412K | 0.002% | 2025-10-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON5 holders report 5% or more of CIEN in their latest filing, all on Schedule 13G (passive). The largest reported stake is FMR LLC at 13.5% of the class (19,113,538 shares), filed 2026-08-06 for an event on 2026-06-30.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-09-03 | 13G/Ano. 1 | JPMORGAN CHASE & CO.parent holding company | 5.6M | 3.9% | 2026-08-31 |
| 2026-08-06 | 13G/Ano. 5 | FMR LLCparent holding company | 19.1M | 13.5% | 2026-06-30 |
| 2026-08-06 | 13G/Ano. 5 | Abigail P. Johnsonindividual | 19.1M | 13.5% | 2026-06-30 |
| 2026-04-29 | 13G | Vanguard Portfolio Managementinvestment adviser | 7.4M | 5.2% | 2026-03-31 |
| 2026-04-29 | 13G | Vanguard Capital Managementinvestment adviser | 10.6M | 7.5% | 2026-03-31 |
| 2026-04-24 | 13G/Ano. 5 | BlackRock, Inc.parent holding company | 11.3M | 8.0% | 2026-03-31 |
| 2026-03-26 | 13G/Ano. 13 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
13F holders
Tracked managers holding CIEN at their latest 13F. JSON9 of the 30 tracked managers held CIEN at their latest 13F, $1.01B in total at quarter-end prices. AQR Capital Management is the largest at $507.2M (0.2% of its portfolio) as of 2026-06-30. Over the prior quarter 7 added shares and 2 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| AQR Capital Management | 2026-06-30 | 1.1M | $507.2M | 0.18% | +75K |
| Citadel Advisors | 2026-06-30 | 214K | $105.0M | 0.01% | +74K |
| Point72 Asset Management | 2026-06-30 | 211K | $103.3M | 0.11% | -334K |
| Renaissance Technologies | 2026-06-30 | 185K | $90.6M | 0.12% | +87K |
| Millennium Management | 2026-06-30 | 166K | $81.6M | 0.03% | +76K |
| D. E. Shaw & Co. | 2026-06-30 | 133K | $65.3M | 0.03% | +124K |
| Bridgewater Associates | 2026-06-30 | 101K | $49.6M | 0.20% | -43K |
| Two Sigma Investments | 2026-06-30 | 10K | $4.7M | 0.00% | +6K |
| Fisher Asset Management | 2026-06-30 | 679 | $333K | 0.00% | +69 |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
Financials
SEC XBRL, as filed. JSONIn Q3 FY 2026 (quarter ended 2026-08-01) Ciena reported revenue of $1.67B, up 37.0% from the same quarter a year earlier, and net income of $266.4M (1.83 diluted EPS). In FY 2025 it generated $806.1M of operating cash flow and spent $334.5M on buybacks. As of 2026-08-01, cash was $2.45B against $3.23B of debt.
- Cash
- $2.45B
- Debt
- $3.23B
- Equity
- $3.06B
- Total assets
- $8.00B
- Shares outstanding
- 141,808,525
Quarterly, last 8 quarters
| Quarter | Period end | Revenue | Net income | Margin | Diluted EPS |
|---|---|---|---|---|---|
| Q3 FY 2026 | 2026-08-01 | $1.67B | $266.4M | 15.9% | 1.83 |
| Q2 FY 2026 | 2026-05-02 | $1.57B | $218.2M | 13.9% | 1.49 |
| Q1 FY 2026 | 2026-01-31 | $1.43B | $150.3M | 10.5% | 1.03 |
| Q4 FY 2025derived | 2025-11-01 | $1.35B | $19.5M | 1.4% | n/a |
| Q3 FY 2025 | 2025-08-02 | $1.22B | $50.3M | 4.1% | 0.35 |
| Q2 FY 2025 | 2025-05-03 | $1.13B | $9.0M | 0.8% | 0.06 |
| Q1 FY 2025 | 2025-02-01 | $1.07B | $44.6M | 4.2% | 0.31 |
| Q4 FY 2024derived | 2024-11-02 | $1.12B | $37.0M | 3.3% | n/a |
Fiscal years, with buybacks and dividends
| Fiscal year | Ends | Revenue | Net income | Operating cash flow | Capex | Buybacks | Dividends |
|---|---|---|---|---|---|---|---|
| FY 2025 | 2025-11-01 | $4.77B | $123.3M | $806.1M | $140.8M | $334.5M | n/a |
| FY 2024 | 2024-11-02 | $4.01B | $84.0M | $514.5M | $136.6M | $254.5M | n/a |
| FY 2023 | 2023-10-28 | $4.39B | $254.8M | $168.3M | $106.2M | $242.2M | n/a |
| FY 2022 | 2022-10-29 | $3.63B | $152.9M | -$167.8M | $90.8M | $500.8M | n/a |
| FY 2021 | 2021-10-30 | $3.62B | $500.2M | $541.6M | $79.5M | $91.3M | n/a |
Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are the cash the company paid to repurchase its common stock in the year, not the amount authorized. Balance sheet lines are as of 2026-08-01; shares outstanding as of 2026-08-28 from the cover page.
What this page is
Ciena in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.
This page follows Ciena (CIEN), SEC CIK 936395, listed on NYSE, classified by the SEC as telephone & telegraph apparatus. The cross-market tables live on the short interest and insider transactions hubs.
Source and updates
- Short interest
- FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-10-15.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-11-02.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-10-13.JSON and CSV
- Planned sales
- SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-10-15.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-09-03.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Financials
- SEC EDGAR 10-K and 10-Q filingsSource: SEC.Weekly; values are as filed in the 10-Q and 10-K. Latest 2026-08-01.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-09-03.JSON and CSV
- Insider trades
- SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-10-15.JSON and CSV
- Company record
- EDGAR filing index for CIK 936395Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 10 requests a minute without a key, 30 with a free key from a free account.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
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Datasets
Frequently Asked Questions
How much of CIEN is sold short?
3,984,850 shares were held short at the 2026-10-15 settlement, 1.2 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is CIEN's daily short volume?
On 2026-11-02, 782,718 of the 2,061,239 CIEN shares reported to FINRA were sold short, 38.0% of the day's reported volume. Short volume is a flow for one day, not a position.
Does CIEN have fails to deliver?
The SEC's latest file shows 90 CIEN shares failed to deliver at settlement 2026-10-13. Fails are reported per settlement date and published twice a month with a lag.
Are CIEN insiders buying or selling?
Insiders at CIEN reported 22 open-market sells worth $16.9M in the last 90 days and no open-market buys. Latest filing: Gage Brodie (EVP & Chief Product & Tech) on 2026-10-15.
Have CIEN insiders filed to sell?
50 Form 144 notices on file for CIEN worth $53.6M at the prices reported; 15 in the last 90 days worth $10.4M. Latest: DAVID ROTHENSTEIN filed on 2026-10-15 to sell 2,500 shares ($899K) from 2026-10-15.
Who owns 5% or more of CIEN?
5 holders report 5% or more of CIEN in their latest filing, all on Schedule 13G (passive). The largest reported stake is FMR LLC at 13.5% of the class (19,113,538 shares), filed 2026-08-06 for an event on 2026-06-30.
What did CIEN report last quarter?
In Q3 FY 2026 (quarter ended 2026-08-01) Ciena reported revenue of $1.67B, up 37.0% from the same quarter a year earlier, and net income of $266.4M (1.83 diluted EPS). In FY 2025 it generated $806.1M of operating cash flow and spent $334.5M on buybacks. As of 2026-08-01, cash was $2.45B against $3.23B of debt.
Which tracked 13F managers own CIEN?
9 of the 30 tracked 13F managers held CIEN shares at their latest filing, $1.01B in all. The largest: Cliff Asness's AQR Capital Management (1.1M shares, $507.2M), Ken Griffin's Citadel Advisors (214K shares, $105.0M), Steve Cohen's Point72 Asset Management (211K shares, $103.3M), Renaissance Technologies (185K shares, $90.6M), Izzy Englander's Millennium Management (166K shares, $81.6M), D. E. Shaw & Co. (133K shares, $65.3M). The table above lists all 9.
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.