CERS
Cerus CorpCompany with tickers: CERS
CIK
1020214
CUSIP
157085101
Shares Outstanding
200,368,974
13F Activity (30d)
10 filings
6 filers
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
66/100
Short interest 5.4% of shares — P75
Days to cover 4.2 — P66
Short-volume trend +1.4% — P58
Peer-relative percentile rank across all stocks reporting short interest at the latest settlement date (2026-05-29). Equal-weight mean of the available factors.
Short Interest History
| Settlement Date | Current Position | Previous Position | Change | Days to Cover |
|---|---|---|---|---|
| 2026-05-29 | 10,766,701 | 18,522,745 | -7,756,044 | 4.24 |
| 2026-05-15 | 18,522,745 | 11,273,044 | +7,249,701 | 4.00 |
| 2026-04-30 | 11,273,044 | 11,204,876 | +68,168 | 10.51 |
| 2026-04-15 | 11,204,876 | 11,119,137 | +85,739 | 12.45 |
| 2026-03-31 | 11,119,137 | 10,511,205 | +607,932 | 6.30 |
| 2026-03-13 | 10,511,205 | 7,781,596 | +2,729,609 | 3.61 |
| 2026-02-27 | 7,781,596 | 7,818,308 | -36,712 | 5.69 |
| 2026-02-13 | 7,818,308 | 6,725,116 | +1,093,192 | 8.01 |
| 2026-01-30 | 6,725,116 | 7,143,959 | -418,843 | 5.93 |
| 2026-01-15 | 7,143,959 | 6,714,909 | +429,050 | 3.62 |
| 2025-12-31 | 6,714,909 | 6,239,300 | +475,609 | 4.85 |
| 2025-12-15 | 6,239,300 | 5,838,160 | +401,140 | 3.60 |
| 2025-11-28 | 5,838,160 | 5,720,796 | +117,364 | 4.46 |
| 2025-11-14 | 5,720,796 | 5,222,244 | +498,552 | 4.11 |
| 2025-10-31 | 5,222,244 | 5,172,543 | +49,701 | 4.72 |
| 2025-10-15 | 5,172,543 | 6,191,774 | -1,019,231 | 3.90 |
| 2025-09-30 | 6,191,774 | 11,017,115 | -4,825,341 | 3.37 |
| 2025-09-15 | 11,017,115 | 6,904,159 | +4,112,956 | 8.89 |
| 2025-08-29 | 6,904,159 | 9,739,408 | -2,835,249 | 6.88 |
| 2025-08-15 | 9,739,408 | 7,006,354 | +2,733,054 | 6.94 |
| 2025-07-31 | 7,006,354 | 7,386,300 | -379,946 | 7.61 |
| 2025-07-15 | 7,386,300 | 7,963,960 | -577,660 | 8.30 |
| 2025-06-30 | 7,963,960 | 6,717,041 | +1,246,919 | 6.46 |
Showing 1–23 of 23 settlements