CIEN
Ciena Corp
$418.46
-28.47 (-6.37%)
At close · Jul 15
Market Cap
$60.14B
Shares
141,552,922
Total shares sold short and not yet covered, reported to FINRA by broker-dealers and published twice a month (bi-monthly). Days to cover divides the short position by average daily volume; a high value (above 5) can signal short-squeeze potential.
Short Squeeze Score
43/100
Short interest 2.7% of shares — P57
Days to cover 1.0 — P15
Price vs VWAP -15.3% — P20
Short-volume trend +5.0% — P69
Short interest change -19.1% — P17
Worst FTD 0.23% of shares — P84
Peer-relative percentile rank across all stocks reporting short interest at the latest settlement date (2026-06-30). Weighted mean of the available factors (short interest 30%, days to cover 20%, price vs VWAP 15%, short-volume trend 15%, short-interest change 10%, fails-to-deliver 10%) plus catalyst boosts (price spike, volume surge, earnings within days), capped at +20 and clamped to 100.
Short Interest History
| Settlement Date | Current Position | Previous Position | Change | Days to Cover |
|---|---|---|---|---|
| 2026-06-30 | 3,853,439 | 4,760,443 | -907,004 | 1.00 |
| 2026-06-15 | 4,760,443 | 4,505,490 | +254,953 | 1.11 |
| 2026-05-29 | 4,505,490 | 4,529,072 | -23,582 | 2.15 |
| 2026-05-15 | 4,529,072 | 4,365,229 | +163,843 | 2.41 |
| 2026-04-30 | 4,365,229 | 4,693,751 | -328,522 | 2.02 |
| 2026-04-15 | 4,693,751 | 5,977,920 | -1,284,169 | 1.59 |
| 2026-03-31 | 5,977,920 | 5,044,648 | +933,272 | 1.66 |
| 2026-03-13 | 5,044,648 | 6,258,043 | -1,213,395 | 1.52 |
| 2026-02-27 | 6,258,043 | 5,619,035 | +639,008 | 2.58 |
| 2026-02-13 | 5,619,035 | 4,244,185 | +1,374,850 | 1.00 |
| 2026-01-30 | 4,244,185 | 5,952,010 | -1,707,825 | 1.88 |
| 2026-01-15 | 5,952,010 | 6,498,989 | -546,979 | 2.23 |
| 2025-12-31 | 6,498,989 | 7,308,972 | -809,983 | 3.09 |
| 2025-12-15 | 7,308,972 | 6,406,321 | +902,651 | 2.01 |
| 2025-11-28 | 6,406,321 | 5,836,886 | +569,435 | 1.58 |
| 2025-11-14 | 5,836,886 | 4,098,820 | +1,738,066 | 1.84 |
| 2025-10-31 | 4,098,820 | 4,426,005 | -327,185 | 1.82 |
| 2025-10-15 | 4,426,005 | 4,852,614 | -426,609 | 1.78 |
| 2025-09-30 | 4,852,614 | 4,011,138 | +841,476 | 1.77 |
| 2025-09-15 | 4,011,138 | 4,759,717 | -748,579 | 1.00 |
| 2025-08-29 | 4,759,717 | 5,442,615 | -682,898 | 2.71 |
| 2025-08-15 | 5,442,615 | 5,744,440 | -301,825 | 3.29 |
| 2025-07-31 | 5,744,440 | 5,434,389 | +310,051 | 3.44 |
Showing 1–23 of 23 settlements
Key facts
CIK
936395
CUSIP
171779309
13F (30d)
123 filings
120 filers
Visit website
Investor relations