IONS

Ionis Pharmaceuticals Inc

$54.73 -0.20 (-0.36%) At close · Jul 15

Market Cap

$9.04B

165,262,556

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.

1M 3M 6M 1Y 5Y All

Short Volume

Date	Short Volume	Short Exempt	Total Volume	Short %
2026-07-15	1,064,628	36	1,507,830	70.6%
2026-07-14	1,245,431	30,300	2,080,426	59.9%
2026-07-13	1,581,474	32,600	2,664,167	59.4%
2026-07-10	3,252,819	301,410	5,386,819	60.4%
2026-07-09	5,221,041	501,695	10,301,638	50.7%
2026-07-08	633,589	36,800	832,266	76.1%
2026-07-07	790,750	14,289	1,255,816	63.0%
2026-07-06	518,919	19,925	759,072	68.4%
2026-07-02	769,523	12,419	991,199	77.6%
2026-07-01	356,191	5,196	554,297	64.3%
2026-06-30	342,336	2,184	522,876	65.5%
2026-06-29	778,493	5,026	1,052,907	73.9%
2026-06-26	1,142,965	33,449	1,544,520	74.0%
2026-06-25	776,853	33,356	1,167,055	66.6%
2026-06-24	786,106	33,200	1,176,024	66.8%
2026-06-23	355,177	11,660	644,162	55.1%
2026-06-22	651,997	650	1,066,840	61.1%
2026-06-18	221,299	570	342,911	64.5%
2026-06-17	330,599	1	609,746	54.2%
2026-06-16	290,279	3	371,366	78.2%
2026-06-15	259,379	518	534,610	48.5%
2026-06-12	643,059	0	1,061,637	60.6%
2026-06-11	725,648	0	999,257	72.6%
2026-06-10	409,970	941	687,148	59.7%
2026-06-09	316,982	73	556,432	57.0%
2026-06-08	311,079	2,258	761,039	40.9%
2026-06-05	358,150	5,015	842,264	42.5%
2026-06-04	258,361	1,882	532,890	48.5%
2026-06-03	223,807	24,209	398,555	56.2%
2026-06-02	533,630	31	802,247	66.5%
2026-06-01	318,577	4,545	505,974	63.0%
2026-05-29	221,897	852	419,289	52.9%
2026-05-28	563,932	615	735,804	76.6%
2026-05-27	314,874	5,452	472,071	66.7%
2026-05-26	185,579	547	354,555	52.3%
2026-05-22	362,241	14	623,982	58.1%
2026-05-21	874,405	1,202	1,137,661	76.9%
2026-05-20	620,303	940	844,909	73.4%
2026-05-19	320,656	398	566,292	56.6%
2026-05-18	416,841	987	916,117	45.5%
2026-05-15	490,283	58	727,164	67.4%
2026-05-14	423,666	250	726,983	58.3%
2026-05-13	328,229	526	563,608	58.2%
2026-05-12	245,896	2,974	573,201	42.9%
2026-05-11	290,400	1,466	631,155	46.0%
2026-05-08	303,315	753	530,959	57.1%
2026-05-07	726,113	180	916,277	79.2%
2026-05-06	553,117	10,032	688,543	80.3%
2026-05-05	141,199	1,347	277,836	50.8%
2026-05-04	276,467	37,107	496,326	55.7%

Showing 1–50 of 62 days

Key facts CIK 874015 CUSIP 462222100 13F (30d) 59 filings 39 filers Visit website Investor relations