CIEN
Ciena Corporation
stockNYSE
Market OpenNov 13, 2026 1:22:08 PM EST
278.39USD-5.308%(-15.60)1,068,266
Pre-marketNov 13, 2026 9:27:30 AM EST
293.40USD-0.201%(-0.59)
As of 2026-10-30, there were 3,905,235 shares short with a short interest of 2.77%.
CIEN Short Interest - Official
CIEN Short Position Change - Official
CIEN Short Interest - Official
| Settlement Date1 | Short Interest % | Short Position | Days to Cover2 | Short Position Change | Short Position Change % | Shares Out | Shares Float |
|---|---|---|---|---|---|---|---|
| 2026-10-30 | 2.77 | 3,905,235 | 1.37 | -79,615 | -2.00 | 141,808,525 | 141,171,805 |
| 2026-10-15 | 2.82 | 3,984,850 | 1.16 | +115,878 | +3.00 | 141,808,525 | 141,161,878 |
| 2026-09-30 | 2.75 | 3,868,972 | 1.44 | +278,070 | +7.74 | 141,808,525 | 140,870,637 |
| 2026-09-15 | 2.55 | 3,590,902 | 1.17 | +245,045 | +7.32 | 141,808,525 | 140,870,637 |
| 2026-08-31 | 2.38 | 3,345,857 | 1.99 | +424,457 | +14.53 | 141,552,922 | 140,870,637 |
| 2026-08-14 | 2.07 | 2,921,400 | 1.37 | -789,706 | -21.28 | 141,552,922 | 140,870,637 |
| 2026-07-31 | 2.63 | 3,711,106 | 1.62 | -282,082 | -7.06 | 141,552,922 | 140,870,637 |
| 2026-07-15 | 2.83 | 3,993,188 | 2.40 | +139,749 | +3.63 | 141,552,922 | 140,864,975 |
| 2026-06-30 | 2.74 | 3,853,439 | 1.00 | -907,004 | -19.05 | 141,552,922 | 140,876,299 |
| 2026-06-15 | 3.38 | 4,760,443 | 1.11 | +231,371 | +5.11 | 141,552,922 | 140,883,377 |
| 2026-05-15 | 3.25 | 4,529,072 | 2.41 | +163,843 | +3.75 | 141,398,427 | 139,231,641 |
| 2026-04-30 | 3.13 | 4,365,229 | 2.02 | -328,522 | -7.00 | 141,398,427 | 139,616,622 |
| 2026-04-15 | 3.36 | 4,693,751 | 1.59 | -1,284,169 | -21.48 | 141,398,427 | 139,616,622 |
| 2026-03-31 | 4.28 | 5,977,920 | 1.66 | +933,272 | +18.50 | 141,398,427 | 139,616,622 |
| 2026-03-13 | 3.61 | 5,044,648 | 1.52 | -1,213,395 | -19.39 | 141,398,427 | 139,616,622 |
| 2026-02-27 | 4.48 | 6,258,043 | 2.58 | +639,008 | +11.37 | 141,463,456 | 139,616,622 |
| 2026-02-13 | 4.02 | 5,619,035 | 1.00 | +1,374,850 | +32.39 | 141,463,456 | 139,616,622 |
| 2026-01-30 | 3.04 | 4,244,185 | 1.88 | -1,707,825 | -28.69 | 140,854,735 | 139,616,622 |
| 2026-01-15 | 4.26 | 5,952,010 | 2.23 | -546,979 | -8.42 | 140,854,735 | 139,616,622 |
| 2025-12-31 | 4.65 | 6,498,989 | 3.09 | -809,983 | -11.08 | 140,854,735 | 139,616,622 |
| 2025-12-15 | 5.23 | 7,308,972 | 2.01 | +902,651 | +14.09 | 140,854,735 | 139,806,380 |
| 2025-11-28 | 4.58 | 6,406,321 | 1.58 | +569,435 | +9.76 | 141,055,908 | 139,838,596 |
| 2025-11-14 | 4.17 | 5,836,886 | 1.84 | +1,738,066 | +42.40 | 141,055,908 | 139,821,669 |
Historical data is split-adjusted.
1 Data from Finra. Finra publishes an updated file every two weeks.
2 Days to Cover (DTC) is also called Short Ratio. This is the Short Position / Average Daily Trading Volume.