CERS
Cerus Corp
stockNASDAQ
Market OpenNov 13, 2026 2:19:31 PM EST
1.96USD+1.031%(+0.02)1,010,295
As of 2026-10-30, there were 14,631,896 shares short with a short interest of 7.67%.
CERS Short Interest - Official
CERS Short Position Change - Official
CERS 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 | 7.67 | 14,631,896 | 8.18 | -1,996,761 | -12.01 | 201,524,898 | 190,677,111 |
| 2026-10-15 | 8.72 | 16,628,657 | 9.39 | -951,766 | -5.41 | 201,524,898 | 190,676,708 |
| 2026-09-30 | 9.22 | 17,580,423 | 8.03 | -414,398 | -2.30 | 201,524,898 | 190,584,006 |
| 2026-09-15 | 9.44 | 17,994,821 | 16.58 | +277,105 | +1.56 | 201,524,898 | 190,584,006 |
| 2026-08-31 | 9.30 | 17,717,716 | 10.02 | +386,930 | +2.23 | 201,524,898 | 190,584,006 |
| 2026-08-14 | 9.09 | 17,330,786 | 5.07 | +2,370,624 | +15.85 | 201,524,898 | 190,584,006 |
| 2026-07-31 | 7.89 | 14,960,162 | 5.71 | +1,271,473 | +9.29 | 201,524,898 | 189,490,766 |
| 2026-07-15 | 7.22 | 13,688,689 | 5.50 | +950,293 | +7.46 | 200,368,974 | 189,475,338 |
| 2026-06-30 | 6.60 | 12,738,396 | 4.14 | -6,958,489 | -35.33 | 200,368,974 | 193,117,846 |
| 2026-06-15 | 10.20 | 19,696,885 | 8.49 | +1,174,140 | +6.34 | 200,368,974 | 193,157,318 |
| 2026-05-15 | 9.80 | 18,522,745 | 4.00 | +7,249,701 | +64.31 | 200,368,974 | 189,086,822 |
| 2026-04-30 | 6.38 | 11,273,044 | 10.51 | +68,168 | +0.61 | 200,368,974 | 176,749,314 |
| 2026-04-15 | 6.34 | 11,204,876 | 12.45 | +85,739 | +0.77 | 192,171,776 | 176,749,314 |
| 2026-03-31 | 6.29 | 11,119,137 | 6.30 | +607,932 | +5.78 | 192,171,776 | 176,749,314 |
| 2026-03-13 | 5.95 | 10,511,205 | 3.61 | +2,729,609 | +35.08 | 192,171,776 | 176,749,314 |
| 2026-02-27 | 4.40 | 7,781,596 | 5.69 | -36,712 | -0.47 | 192,087,501 | 176,749,314 |
| 2026-02-13 | 4.42 | 7,818,308 | 8.01 | +1,093,192 | +16.26 | 192,087,501 | 176,749,314 |
| 2026-01-30 | 3.80 | 6,725,116 | 5.93 | -418,843 | -5.86 | 192,087,501 | 176,749,314 |
| 2026-01-15 | 4.04 | 7,143,959 | 3.62 | +429,050 | +6.39 | 192,087,501 | 176,749,314 |
| 2025-12-31 | 3.80 | 6,714,909 | 4.85 | +475,609 | +7.62 | 192,087,501 | 176,749,314 |
| 2025-12-15 | 3.54 | 6,239,300 | 3.60 | +401,140 | +6.87 | 192,087,501 | 176,422,765 |
| 2025-11-28 | 3.31 | 5,838,160 | 4.46 | +117,364 | +2.05 | 192,087,501 | 176,367,060 |
| 2025-11-14 | 3.30 | 5,720,796 | 4.11 | +498,552 | +9.55 | 192,087,501 | 173,491,510 |
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.