IONS · Ionis Pharmaceuticals Inc · Short Volume
$44.60
+0.22 (+0.50%)
At close · Oct 20
Return incl. dividend (before tax)
Market Cap
$7.38B
Shares
166.18M
Volume · Oct 19
3.11M
Avg daily vol (3M)
3.27M
Daily short-sale volume published by FINRA from its trade-reporting facilities. It measures how many shares were sold short each day as a share of total volume — a daily flow, not the total outstanding short position.
Short Volume
| Date | Short Volume | Short Exempt | Total Volume | Short % |
|---|---|---|---|---|
| 2026-10-19 | 416,695 | 35,800 | 817,226 | 51.0% |
| 2026-10-16 | 233,848 | 2,306 | 566,748 | 41.3% |
| 2026-10-15 | 344,627 | 40 | 829,039 | 41.6% |
| 2026-10-14 | 384,551 | 0 | 680,213 | 56.5% |
| 2026-10-13 | 283,605 | 8 | 767,571 | 36.9% |
| 2026-10-12 | 251,034 | 51 | 688,926 | 36.4% |
| 2026-10-09 | 817,352 | 271 | 3,425,892 | 23.9% |
| 2026-10-08 | 278,815 | 0 | 1,128,198 | 24.7% |
| 2026-10-07 | 335,196 | 16,200 | 820,412 | 40.9% |
| 2026-10-06 | 405,782 | 50,160 | 944,473 | 43.0% |
| 2026-10-05 | 258,463 | 58 | 1,033,641 | 25.0% |
| 2026-10-02 | 286,487 | 0 | 862,139 | 33.2% |
| 2026-10-01 | 227,226 | 330 | 923,050 | 24.6% |
| 2026-09-30 | 338,367 | 4,478 | 915,639 | 37.0% |
| 2026-09-29 | 415,027 | 42 | 2,088,310 | 19.9% |
| 2026-09-28 | 455,661 | 500 | 1,410,646 | 32.3% |
| 2026-09-25 | 254,487 | 0 | 2,885,438 | 8.8% |
| 2026-09-24 | 388,761 | 5 | 1,540,498 | 25.2% |
| 2026-09-23 | 434,981 | 150 | 1,476,614 | 29.5% |
| 2026-09-22 | 824,598 | 15,140 | 2,195,671 | 37.6% |
| 2026-09-21 | 972,600 | 15 | 2,060,528 | 47.2% |
| 2026-09-18 | 326,655 | 300 | 1,767,607 | 18.5% |
| 2026-09-17 | 422,974 | 1,217 | 1,632,707 | 25.9% |
| 2026-09-16 | 594,346 | 1,474 | 3,058,519 | 19.4% |
| 2026-09-15 | 862,680 | 2,384 | 2,831,996 | 30.5% |
| 2026-09-14 | 719,225 | 115,928 | 2,552,780 | 28.2% |
| 2026-09-11 | 355,426 | 5,954 | 846,176 | 42.0% |
| 2026-09-10 | 308,457 | 267 | 1,007,491 | 30.6% |
| 2026-09-09 | 248,351 | 2,257 | 1,229,503 | 20.2% |
| 2026-09-08 | 1,288,807 | 32,618 | 4,356,518 | 29.6% |
| 2026-09-04 | 350,510 | 30,784 | 913,881 | 38.4% |
| 2026-09-03 | 552,941 | 17,226 | 2,028,657 | 27.3% |
| 2026-09-02 | 340,306 | 124 | 741,210 | 45.9% |
| 2026-09-01 | 305,822 | 778 | 633,248 | 48.3% |
| 2026-08-31 | 379,802 | 2,602 | 649,419 | 58.5% |
| 2026-08-28 | 444,360 | 57,284 | 715,275 | 62.1% |
| 2026-08-27 | 383,770 | 976 | 574,040 | 66.9% |
| 2026-08-26 | 756,131 | 1,158 | 1,005,380 | 75.2% |
| 2026-08-25 | 624,356 | 12,662 | 1,016,660 | 61.4% |
| 2026-08-24 | 521,314 | 14,210 | 863,647 | 60.4% |
| 2026-08-21 | 589,350 | 430 | 1,274,304 | 46.2% |
| 2026-08-20 | 352,304 | 449 | 861,830 | 40.9% |
| 2026-08-19 | 640,463 | 5,448 | 1,307,971 | 49.0% |
| 2026-08-18 | 551,874 | 3,729 | 1,023,305 | 53.9% |
| 2026-08-17 | 356,672 | 3,836 | 656,135 | 54.4% |
| 2026-08-14 | 197,653 | 6,000 | 589,890 | 33.5% |
| 2026-08-13 | 268,039 | 2,103 | 444,957 | 60.2% |
| 2026-08-12 | 368,060 | 1,177 | 997,824 | 36.9% |
| 2026-08-11 | 374,506 | 3,147 | 1,170,616 | 32.0% |
| 2026-08-10 | 407,784 | 804 | 715,585 | 57.0% |
Showing 1–50 of 65 days
Key facts
CIK
874015
CUSIP
462222100
13F (30d)
41 filings
40 filers
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